Initial commit

.gitignore

@@ -0,0 +1,9 @@
+*.iml
+.gradle
+/local.properties
+/.idea/workspace.xml
+/.idea/libraries
+.DS_Store
+/build
+/captures
+.externalNativeBuild

.idea/compiler.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <resourceExtensions />
+    <wildcardResourcePatterns>
+      <entry name="!?*.java" />
+      <entry name="!?*.form" />
+      <entry name="!?*.class" />
+      <entry name="!?*.groovy" />
+      <entry name="!?*.scala" />
+      <entry name="!?*.flex" />
+      <entry name="!?*.kt" />
+      <entry name="!?*.clj" />
+      <entry name="!?*.aj" />
+    </wildcardResourcePatterns>
+    <annotationProcessing>
+      <profile default="true" name="Default" enabled="false">
+        <processorPath useClasspath="true" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/copyright/profiles_settings.xml

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+<component name="CopyrightManager">
+  <settings default="" />
+</component>

.idea/gradle.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="distributionType" value="DEFAULT_WRAPPED" />
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+            <option value="$PROJECT_DIR$/app" />
+          </set>
+        </option>
+        <option name="resolveModulePerSourceSet" value="false" />
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="EntryPointsManager">
+    <entry_points version="2.0" />
+  </component>
+  <component name="NullableNotNullManager">
+    <option name="myDefaultNullable" value="android.support.annotation.Nullable" />
+    <option name="myDefaultNotNull" value="android.support.annotation.NonNull" />
+    <option name="myNullables">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.Nullable" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nullable" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.Nullable" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.Nullable" />
+        </list>
+      </value>
+    </option>
+    <option name="myNotNulls">
+      <value>
+        <list size="4">
+          <item index="0" class="java.lang.String" itemvalue="org.jetbrains.annotations.NotNull" />
+          <item index="1" class="java.lang.String" itemvalue="javax.annotation.Nonnull" />
+          <item index="2" class="java.lang.String" itemvalue="edu.umd.cs.findbugs.annotations.NonNull" />
+          <item index="3" class="java.lang.String" itemvalue="android.support.annotation.NonNull" />
+        </list>
+      </value>
+    </option>
+  </component>
+  <component name="ProjectLevelVcsManager" settingsEditedManually="false">
+    <OptionsSetting value="true" id="Add" />
+    <OptionsSetting value="true" id="Remove" />
+    <OptionsSetting value="true" id="Checkout" />
+    <OptionsSetting value="true" id="Update" />
+    <OptionsSetting value="true" id="Status" />
+    <OptionsSetting value="true" id="Edit" />
+    <ConfirmationsSetting value="0" id="Add" />
+    <ConfirmationsSetting value="0" id="Remove" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" default="true" assert-keyword="true" jdk-15="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/build/classes" />
+  </component>
+  <component name="ProjectType">
+    <option name="id" value="Android" />
+  </component>
+</project>

.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/Inventoryapp.iml" filepath="$PROJECT_DIR$/Inventoryapp.iml" />
+      <module fileurl="file://$PROJECT_DIR$/app/app.iml" filepath="$PROJECT_DIR$/app/app.iml" />
+    </modules>
+  </component>
+</project>

.idea/runConfigurations.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.AllInPackageGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestClassGradleConfigurationProducer" />
+        <option value="org.jetbrains.plugins.gradle.execution.test.runner.TestMethodGradleConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

app/.gitignore

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+/build

app/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 25
+    buildToolsVersion "25.0.2"
+    defaultConfig {
+        applicationId "com.example.h_mal.inventoryapp"
+        minSdkVersion 15
+        targetSdkVersion 25
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    compile fileTree(dir: 'libs', include: ['*.jar'])
+    androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
+        exclude group: 'com.android.support', module: 'support-annotations'
+    })
+    compile 'com.android.support:appcompat-v7:25.3.0'
+    compile 'com.android.support:design:25.3.0'
+    testCompile 'junit:junit:4.12'
+}

app/proguard-rules.pro

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+# Add project specific ProGuard rules here.
+# By default, the flags in this file are appended to flags specified
+# in C:\Users\h_mal\AppData\Local\Android\Sdk/tools/proguard/proguard-android.txt
+# You can edit the include path and order by changing the proguardFiles
+# directive in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# Add any project specific keep options here:
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}

app/src/androidTest/java/com/example/h_mal/inventoryapp/ExampleInstrumentedTest.java

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+package com.example.h_mal.inventoryapp;
+
+import android.content.Context;
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumentation test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() throws Exception {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getTargetContext();
+
+        assertEquals("com.example.h_mal.inventoryapp", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.h_mal.inventoryapp">
+
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity
+            android:name=".MainActivity"
+            android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".AddProduct"
+            android:parentActivityName=".MainActivity">
+            <meta-data
+                android:name="android.support.PARENT_ACTIVITY"
+                android:value=".MainActivity" />
+        </activity>
+
+        <provider
+            android:name=".data.ProductProvider"
+            android:authorities="com.example.h_mal.inventoryapp"
+            android:exported="false" />
+
+    </application>
+
+</manifest>

app/src/main/java/com/example/h_mal/inventoryapp/AddProduct.java

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+package com.example.h_mal.inventoryapp;
+
+import android.Manifest;
+import android.app.LoaderManager;
+import android.content.ContentValues;
+import android.content.CursorLoader;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.Loader;
+import android.content.pm.PackageManager;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.provider.MediaStore;
+import android.support.v4.app.ActivityCompat;
+import android.support.v4.app.NavUtils;
+import android.support.v4.content.ContextCompat;
+import android.support.v7.app.AlertDialog;
+import android.support.v7.app.AppCompatActivity;
+import android.text.TextUtils;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.MotionEvent;
+import android.view.View;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.Toast;
+
+import com.example.h_mal.inventoryapp.data.ProductContract.ProductEntry;
+
+public class AddProduct extends AppCompatActivity implements
+        LoaderManager.LoaderCallbacks<Cursor>{
+
+    private static final int MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE = 1;
+
+    private static final int EXISTING_PRODUCT_LOADER = 0;
+
+    private Uri mCurrentProductUri;
+
+    private EditText mNameEditText;
+
+    private EditText mQuantityEditText;
+
+    private EditText mPriceEditText;
+
+    private ImageView mImageView;
+
+    private Uri mImageURI;
+
+    private static final int RESULT_LOAD_IMAGE = 1;
+
+    private boolean mProductHasChanged = false;
+
+    private static final int PICK_IMAGE_REQUEST = 0;
+
+    private View.OnTouchListener mTouchListener = new View.OnTouchListener() {
+        @Override
+        public boolean onTouch(View view, MotionEvent motionEvent) {
+            mProductHasChanged = true;
+            return false;
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_add_product);
+
+        mNameEditText = (EditText) findViewById(R.id.productName);
+        mQuantityEditText = (EditText) findViewById(R.id.productQuantity);
+        mPriceEditText = (EditText) findViewById(R.id.productPrice);
+        mImageView = (ImageView) findViewById(R.id.imageView2);
+
+        Intent intent = getIntent();
+        mCurrentProductUri = intent.getData();
+
+        if (mCurrentProductUri == null) {
+            setTitle(getString(R.string.add_product_title));
+
+            invalidateOptionsMenu();
+        } else {
+
+            setTitle(getString(R.string.edit_product_title));
+
+
+            getLoaderManager().initLoader(EXISTING_PRODUCT_LOADER, null, this);
+        }
+
+        Button Browse = (Button) findViewById(R.id.BrowseImage);
+        Browse.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                tryToOpenImageSelector();
+
+            }
+        });
+
+        Button SubmitProduct = (Button) findViewById(R.id.submit);
+        SubmitProduct.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                    saveProduct();
+            }
+        });
+
+        ImageButton ContactSupplier = (ImageButton) findViewById(R.id.ContactSupplier);
+        ContactSupplier.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent = new Intent(Intent.ACTION_SENDTO);
+                intent.setData(Uri.parse("mailto:")); // only email apps should handle this
+                intent.putExtra(Intent.EXTRA_SUBJECT, "Order Stock " + mNameEditText.getText().toString().trim());
+                intent.putExtra(Intent.EXTRA_TEXT, "I would like to order more " + mNameEditText.getText().toString().trim());
+                if (intent.resolveActivity(getPackageManager()) != null) {
+                    startActivity(intent);
+                }
+            }
+        });
+
+        Button Incrament = (Button) findViewById(R.id.buttonAdd);
+        Incrament.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                IncramentQuantity();
+            }
+        });
+
+        Button decrament = (Button) findViewById(R.id.buttonMinus);
+        decrament.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                DecramentQuantity();
+            }
+        });
+
+
+        mNameEditText.setOnTouchListener(mTouchListener);
+        mQuantityEditText.setOnTouchListener(mTouchListener);
+        mPriceEditText.setOnTouchListener(mTouchListener);
+
+    }
+
+    @Override
+    public void onBackPressed() {
+        new AlertDialog.Builder(this)
+                .setTitle("Discard changes?")
+                .setMessage("Are you sure you want to discard changes?")
+                .setNegativeButton(android.R.string.no, null)
+                .setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
+
+                    public void onClick(DialogInterface arg0, int arg1) {
+                        AddProduct.super.onBackPressed();
+                    }
+                }).create().show();
+    }
+
+    private void saveProduct() {
+
+        String nameString = mNameEditText.getText().toString().trim();
+        String quantityString = mQuantityEditText.getText().toString().trim();
+        String priceString = mPriceEditText.getText().toString().trim();
+
+        if (
+                TextUtils.isEmpty(nameString) || TextUtils.isEmpty(quantityString) ||
+                TextUtils.isEmpty(priceString) || mImageURI == null) {
+            Toast.makeText(AddProduct.this, "please insert all product data", Toast.LENGTH_SHORT).show();
+            return;
+        }
+
+        int quantity = Integer.parseInt(quantityString);
+        int price = Integer.parseInt(priceString);
+
+        ContentValues values = new ContentValues();
+        values.put(ProductEntry.COLUMN_PRODUCT_NAME, nameString);
+        values.put(ProductEntry.COLUMN_PRODUCT_PRICE, price);
+        values.put(ProductEntry.COLUMN_PRODUCT_QUANTITY, quantity);
+        values.put(ProductEntry.COLUMN_PRODUCT_IMAGE, String.valueOf(mImageURI));
+
+        if (mCurrentProductUri == null) {
+
+            Uri newUri = getContentResolver().insert(ProductEntry.CONTENT_URI, values);
+
+            if (newUri == null) {
+                Toast.makeText(this, getString(R.string.insert_product_failed),
+                        Toast.LENGTH_SHORT).show();
+            } else {
+
+                Toast.makeText(this, getString(R.string.insert_product_successful),
+                        Toast.LENGTH_SHORT).show();
+            }
+        } else {
+            int rowsAffected = getContentResolver().update(mCurrentProductUri, values, null, null);
+
+            if (rowsAffected == 0) {
+                Toast.makeText(this, getString(R.string.update_product_failed),
+                        Toast.LENGTH_SHORT).show();
+            } else {
+                Toast.makeText(this, getString(R.string.update_product_successful),
+                        Toast.LENGTH_SHORT).show();
+            }
+        }
+        NavUtils.navigateUpFromSameTask(AddProduct.this);
+
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.menu_editor, menu);
+        return true;
+    }
+
+    public void tryToOpenImageSelector() {
+        if (ContextCompat.checkSelfPermission(this,
+                Manifest.permission.READ_EXTERNAL_STORAGE)
+                != PackageManager.PERMISSION_GRANTED) {
+            ActivityCompat.requestPermissions(this,
+                    new String[]{Manifest.permission.READ_EXTERNAL_STORAGE},
+                    MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE);
+            return;
+        }
+        openImageSelector();
+    }
+
+    private void openImageSelector() {
+
+        Intent galleryIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
+        startActivityForResult(galleryIntent, RESULT_LOAD_IMAGE);
+    }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode,
+                                           String permissions[], int[] grantResults) {
+        switch (requestCode) {
+            case MY_PERMISSIONS_REQUEST_READ_EXTERNAL_STORAGE: {
+                if (grantResults.length > 0
+                        && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+                    openImageSelector();
+
+                }
+            }
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+            case R.id.action_delete:
+                DeleteDialog();
+                return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    private void DeleteDialog() {
+        android.app.AlertDialog.Builder builder = new android.app.AlertDialog.Builder(this);
+        builder.setMessage("Are you sure you want to delete");
+        builder.setPositiveButton("delete", new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                deleteProduct();
+            }
+        });
+        builder.setNegativeButton("cancel", new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+
+                if (dialog != null) {
+                    dialog.dismiss();
+                }
+            }
+        });
+
+        android.app.AlertDialog alertDialog = builder.create();
+        alertDialog.show();
+    }
+
+    private void deleteProduct() {
+
+        if (mCurrentProductUri != null) {
+
+            int rowsDeleted = getContentResolver().delete(mCurrentProductUri, null, null);
+
+            if (rowsDeleted == 0) {
+                Toast.makeText(this, "error deleting product", Toast.LENGTH_SHORT).show();
+            } else {
+                Toast.makeText(this, "Product deleted", Toast.LENGTH_SHORT).show();
+            }
+        }
+
+        finish();
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+
+        if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && data != null) {
+            Uri selectedImage = data.getData();
+            mImageView.setImageURI(selectedImage);
+            mImageURI = Uri.parse(selectedImage.toString());
+
+        }
+    }
+
+
+    @Override
+    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
+        String[] projection = {
+                ProductEntry._ID,
+                ProductEntry.COLUMN_PRODUCT_IMAGE,
+                ProductEntry.COLUMN_PRODUCT_NAME,
+                ProductEntry.COLUMN_PRODUCT_QUANTITY,
+                ProductEntry.COLUMN_PRODUCT_PRICE };
+
+        return new CursorLoader(this,
+                mCurrentProductUri,
+                projection,
+                null,
+                null,
+                null);
+    }
+
+    @Override
+    public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
+        if (cursor == null || cursor.getCount() < 1) {
+            return;
+        }
+
+        if (cursor.moveToFirst()) {
+            int nameColumnIndex = cursor.getColumnIndex(ProductEntry.COLUMN_PRODUCT_NAME);
+            int quantityColumnIndex = cursor.getColumnIndex(ProductEntry.COLUMN_PRODUCT_QUANTITY);
+            int priceColumnIndex = cursor.getColumnIndex(ProductEntry.COLUMN_PRODUCT_PRICE);
+            int selectedImage = cursor.getColumnIndex(ProductEntry.COLUMN_PRODUCT_IMAGE);
+
+            String name = cursor.getString(nameColumnIndex);
+            int quantity = cursor.getInt(quantityColumnIndex);
+            int price = cursor.getInt(priceColumnIndex);
+            String image = cursor.getString(selectedImage);
+
+            mNameEditText.setText(name);
+            mQuantityEditText.setText(Integer.toString(quantity));
+            mPriceEditText.setText(Integer.toString(price));
+            mImageView.setImageURI(Uri.parse(image));
+            mImageURI = Uri.parse(image);
+
+
+        }
+    }
+
+    private void IncramentQuantity() {
+        String quantityString = mQuantityEditText.getText().toString();
+        int initialQuantity;
+        if (quantityString.isEmpty()) {
+            initialQuantity = 0;
+        } else {
+            initialQuantity = Integer.parseInt(quantityString);
+        }
+        mQuantityEditText.setText(String.valueOf(initialQuantity + 1));
+    }
+
+    private void DecramentQuantity() {
+        String quantityString = mQuantityEditText.getText().toString();
+        int initialQuantity;
+        if (quantityString.isEmpty()) {
+            return;
+        } else if (quantityString.equals("0")) {
+            return;
+        } else {
+            initialQuantity = Integer.parseInt(quantityString);
+            mQuantityEditText.setText(String.valueOf(initialQuantity - 1));
+        }
+    }
+
+    @Override
+    public void onLoaderReset(Loader<Cursor> loader) {
+
+    }
+}

app/src/main/java/com/example/h_mal/inventoryapp/MainActivity.java

@@ -0,0 +1,136 @@
+package com.example.h_mal.inventoryapp;
+
+import android.app.LoaderManager;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.CursorLoader;
+import android.content.Intent;
+import android.content.Loader;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.support.design.widget.FloatingActionButton;
+import android.support.v7.app.AppCompatActivity;
+import android.util.Log;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.ListView;
+
+import com.example.h_mal.inventoryapp.data.ProductContract.ProductEntry;
+import com.example.h_mal.inventoryapp.data.ProductDbHelper;
+
+public class MainActivity extends AppCompatActivity implements
+        LoaderManager.LoaderCallbacks<Cursor>{
+
+    private static final int PRODUCT_LOADER = 0;
+
+    ProductCursorAdapter mCursorAdapter;
+    ProductDbHelper productDbhelper;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+
+        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
+        fab.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                Intent intent = new Intent(MainActivity.this, AddProduct.class);
+                startActivity(intent);
+            }
+        });
+
+        ListView productListView = (ListView) findViewById(R.id.list_item_view);
+
+        View emptyView = findViewById(R.id.empty_view);
+        productListView.setEmptyView(emptyView);
+
+        mCursorAdapter = new ProductCursorAdapter(this, null);
+        productListView.setAdapter(mCursorAdapter);
+
+        getLoaderManager().initLoader(PRODUCT_LOADER, null, this);
+
+    }
+
+    private void insertProduct() {
+        ContentValues values = new ContentValues();
+        values.put(ProductEntry.COLUMN_PRODUCT_NAME, "demoItem");
+        values.put(ProductEntry.COLUMN_PRODUCT_PRICE, 8);
+        values.put(ProductEntry.COLUMN_PRODUCT_QUANTITY, 4);
+        Uri SadImageuri = Uri.parse("android.resource://com.example.h_mal.inventoryapp/drawable/sad");
+        values.put(ProductEntry.COLUMN_PRODUCT_IMAGE, String.valueOf(SadImageuri));
+
+        Uri newUri = getContentResolver().insert(ProductEntry.CONTENT_URI, values);
+    }
+
+
+    private void deleteAllProducts() {
+        int rowsDeleted = getContentResolver().delete(ProductEntry.CONTENT_URI, null, null);
+        Log.v("MainActivity", rowsDeleted + " rows deleted");
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // Inflate the menu; this adds items to the action bar if it is present.
+        getMenuInflater().inflate(R.menu.menu_main, menu);
+        return true;
+    }
+
+    public void clickOnViewItem(long id) {
+                Intent intent = new Intent(MainActivity.this, AddProduct.class);
+                Uri currentProductUri = ContentUris.withAppendedId(ProductEntry.CONTENT_URI, id);
+                intent.setData(currentProductUri);
+                startActivity(intent);
+    }
+
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+            case R.id.action_settings:
+                deleteAllProducts();
+                return true;
+
+            case R.id.insert_placeholder_data:
+                insertProduct();
+                return true;
+        }
+
+        return super.onOptionsItemSelected(item);
+    }
+
+    @Override
+    public Loader<Cursor> onCreateLoader(int i, Bundle bundle) {
+        // Define a projection that specifies the columns from the table we care about.
+        String[] projection = {
+                ProductEntry._ID,
+                ProductEntry.COLUMN_PRODUCT_IMAGE,
+                ProductEntry.COLUMN_PRODUCT_NAME,
+                ProductEntry.COLUMN_PRODUCT_QUANTITY,
+                ProductEntry.COLUMN_PRODUCT_PRICE};
+
+        // This loader will execute the ContentProvider's query method on a background thread
+        return new CursorLoader(this,   // Parent activity context
+                ProductEntry.CONTENT_URI,   // Provider content URI to query
+                projection,             // Columns to include in the resulting Cursor
+                null,                   // No selection clause
+                null,                   // No selection arguments
+                null);                  // Default sort order
+    }
+
+    @Override
+    public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
+        mCursorAdapter.swapCursor(data);
+    }
+
+    @Override
+    public void onLoaderReset(Loader<Cursor> loader) {
+        mCursorAdapter.swapCursor(null);
+    }
+
+
+}

app/src/main/java/com/example/h_mal/inventoryapp/ProductCursorAdapter.java

@@ -0,0 +1,98 @@
+package com.example.h_mal.inventoryapp;
+
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.net.Uri;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.CursorAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.example.h_mal.inventoryapp.data.ProductContract.ProductEntry;
+
+/**
+ * Created by h_mal on 04/04/2017.
+ */
+
+public class ProductCursorAdapter extends CursorAdapter {
+
+    private final MainActivity activity;
+
+    private Context mContext;
+
+    public ProductCursorAdapter(MainActivity context, Cursor c) {
+        super(context, c, 0);
+        this.activity = context;
+    }
+
+    @Override
+    public View newView(Context context, Cursor cursor, ViewGroup parent) {
+        return LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
+    }
+
+    @Override
+    public void bindView(View view, Context context, Cursor cursor) {
+        mContext = context;
+
+        ImageView picImageView = (ImageView) view.findViewById(R.id.imageView);
+        TextView nameTextView = (TextView) view.findViewById(R.id.Product);
+        TextView priceTextView = (TextView) view.findViewById(R.id.price);
+        TextView quantityTextView = (TextView) view.findViewById(R.id.Qn);
+        Button sellButton = (Button) view.findViewById(R.id.button);
+
+        final String nameColumnIndex = cursor.getString(cursor.getColumnIndexOrThrow(ProductEntry.COLUMN_PRODUCT_NAME));
+        final Integer priceColumnIndex = cursor.getInt(cursor.getColumnIndexOrThrow(ProductEntry.COLUMN_PRODUCT_PRICE));
+        final Integer quantityColumnIndex = cursor.getInt(cursor.getColumnIndexOrThrow(ProductEntry.COLUMN_PRODUCT_QUANTITY));
+        final String imageColumnIndex = cursor.getString(cursor.getColumnIndexOrThrow(ProductEntry.COLUMN_PRODUCT_IMAGE));
+
+        nameTextView.setText(nameColumnIndex);
+        priceTextView.setText(Integer.toString(priceColumnIndex));
+        quantityTextView.setText(String.valueOf(quantityColumnIndex));
+
+//        picImageView.setImageURI(Uri.parse(cursor.getString(cursor.getColumnIndex(ProductEntry.COLUMN_PRODUCT_IMAGE))));
+
+        if (imageColumnIndex == null) {
+            picImageView.setVisibility(View.GONE);
+        }else {
+            picImageView.setVisibility(View.VISIBLE);
+            picImageView.setImageURI(Uri.parse(imageColumnIndex));
+        }
+
+        final long id = cursor.getLong(cursor.getColumnIndexOrThrow(ProductEntry._ID));
+
+        view.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                activity.clickOnViewItem(id);
+            }
+        });
+
+        sellButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View view) {
+                if (view != null) {
+                    Object obj = view.getTag();
+                    String st = obj.toString();
+                    ContentValues values = new ContentValues();
+                    values.put(ProductEntry.COLUMN_PRODUCT_NAME, nameColumnIndex);
+                    values.put(ProductEntry.COLUMN_PRODUCT_IMAGE, imageColumnIndex);
+                    values.put(ProductEntry.COLUMN_PRODUCT_QUANTITY, quantityColumnIndex >= 1? quantityColumnIndex-1: 0);
+                    values.put(ProductEntry.COLUMN_PRODUCT_PRICE, priceColumnIndex);
+
+                    Uri currentPetUri = ContentUris.withAppendedId(ProductEntry.CONTENT_URI, Integer.parseInt(st));
+
+                    int rowsAffected = mContext.getContentResolver().update(currentPetUri, values, null, null);
+
+                }
+            }
+        });
+        Object obj = cursor.getInt(cursor.getColumnIndex(ProductEntry._ID));
+        sellButton.setTag(obj);
+
+    }
+}

app/src/main/java/com/example/h_mal/inventoryapp/data/ProductContract.java

@@ -0,0 +1,47 @@
+package com.example.h_mal.inventoryapp.data;
+
+import android.content.ContentResolver;
+import android.net.Uri;
+import android.provider.BaseColumns;
+
+/**
+ * Created by h_mal on 04/04/2017.
+ */
+
+public class ProductContract {
+
+    private ProductContract() {}
+
+    public static final String CONTENT_AUTHORITY = "com.example.h_mal.inventoryapp";
+
+    public static final Uri BASE_CONTENT_URI = Uri.parse("content://" + CONTENT_AUTHORITY);
+
+    public static final String PATH_PRODUCTS = "products";
+
+    public static final class ProductEntry implements BaseColumns {
+
+        public static final Uri CONTENT_URI = Uri.withAppendedPath(BASE_CONTENT_URI, PATH_PRODUCTS);
+
+        public static final String CONTENT_LIST_TYPE =
+                ContentResolver.CURSOR_DIR_BASE_TYPE + "/" + CONTENT_AUTHORITY + "/" + PATH_PRODUCTS;
+
+
+        public static final String CONTENT_ITEM_TYPE =
+                ContentResolver.CURSOR_ITEM_BASE_TYPE + "/" + CONTENT_AUTHORITY + "/" + PATH_PRODUCTS;
+
+
+        public final static String TABLE_NAME = "products";
+
+        public final static String _ID = BaseColumns._ID;
+
+        public final static String COLUMN_PRODUCT_IMAGE = "image";
+
+        public final static String COLUMN_PRODUCT_NAME ="name";
+
+        public final static String COLUMN_PRODUCT_QUANTITY = "quantity";
+
+        public final static String COLUMN_PRODUCT_PRICE = "price";
+
+
+    }
+}

app/src/main/java/com/example/h_mal/inventoryapp/data/ProductDbHelper.java

@@ -0,0 +1,45 @@
+package com.example.h_mal.inventoryapp.data;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+import com.example.h_mal.inventoryapp.data.ProductContract.ProductEntry;
+
+/**
+ * Created by h_mal on 04/04/2017.
+ */
+
+public class ProductDbHelper extends SQLiteOpenHelper{
+
+    public static final String LOG_TAG = ProductDbHelper.class.getSimpleName();
+
+    private static final String DATABASE_NAME = "inventory.db";
+
+    private static final int DATABASE_VERSION = 1;
+
+
+    public ProductDbHelper(Context context) {
+        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+
+        String SQL_CREATE_PRODUCTS_TABLE =  "CREATE TABLE " + ProductEntry.TABLE_NAME + " ("
+                + ProductEntry._ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
+                + ProductEntry.COLUMN_PRODUCT_IMAGE + " TEXT, "
+                + ProductEntry.COLUMN_PRODUCT_NAME + " TEXT NOT NULL, "
+                + ProductEntry.COLUMN_PRODUCT_QUANTITY + " INTEGER NOT NULL DEFAULT 0, "
+                + ProductEntry.COLUMN_PRODUCT_PRICE + " INTEGER NOT NULL DEFAULT 0)";
+
+        db.execSQL(SQL_CREATE_PRODUCTS_TABLE);
+    }
+
+
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+
+    }
+}

app/src/main/java/com/example/h_mal/inventoryapp/data/ProductProvider.java

@@ -0,0 +1,214 @@
+package com.example.h_mal.inventoryapp.data;
+
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.util.Log;
+
+import com.example.h_mal.inventoryapp.data.ProductContract.ProductEntry;
+
+public class ProductProvider extends ContentProvider {
+
+
+    public static final String LOG_TAG = ProductProvider.class.getSimpleName();
+
+    private static final int PRODUCTS = 100;
+    private static final int PRODUCT_ID = 101;
+
+    private static final UriMatcher sUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+
+
+    static {
+
+        sUriMatcher.addURI(ProductContract.CONTENT_AUTHORITY, ProductContract.PATH_PRODUCTS, PRODUCTS);
+
+        sUriMatcher.addURI(ProductContract.CONTENT_AUTHORITY, ProductContract.PATH_PRODUCTS + "/#", PRODUCT_ID);
+    }
+
+    ProductDbHelper mDbHelper;
+
+    @Override
+    public boolean onCreate() {
+        mDbHelper = new ProductDbHelper(getContext());
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+                        String sortOrder) {
+
+        SQLiteDatabase database = mDbHelper.getReadableDatabase();
+
+        Cursor cursor;
+
+        int match = sUriMatcher.match(uri);
+        switch (match) {
+            case PRODUCTS:
+
+                cursor = database.query(ProductEntry.TABLE_NAME, projection, selection, selectionArgs,
+                        null, null, sortOrder);
+                break;
+            case PRODUCT_ID:
+
+                selection = ProductEntry._ID + "=?";
+                selectionArgs = new String[] { String.valueOf(ContentUris.parseId(uri)) };
+                cursor = database.query(ProductEntry.TABLE_NAME, projection, selection, selectionArgs,
+                        null, null, sortOrder);
+                break;
+            default:
+                throw new IllegalArgumentException("Cannot query " + uri);
+        }
+
+        cursor.setNotificationUri(getContext().getContentResolver(), uri);
+
+        return cursor;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues contentValues) {
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case PRODUCTS:
+                return insertProduct(uri, contentValues);
+            default:
+                throw new IllegalArgumentException("Insertion is not supported for " + uri);
+        }
+    }
+
+    private Uri insertProduct(Uri uri, ContentValues values) {
+
+        String name = values.getAsString(ProductEntry.COLUMN_PRODUCT_NAME);
+        if (name == null) {
+            throw new IllegalArgumentException("name required");
+        }
+
+        Integer quantity = values.getAsInteger(ProductEntry.COLUMN_PRODUCT_QUANTITY);
+        if (quantity != null && quantity < 0) {
+            throw new IllegalArgumentException("quantity required");
+        }
+
+
+        Integer price = values.getAsInteger(ProductEntry.COLUMN_PRODUCT_PRICE);
+        if (price != null && price < 0) {
+            throw new IllegalArgumentException("Price required");
+        }
+
+        String image = values.getAsString(ProductEntry.COLUMN_PRODUCT_IMAGE);
+        if (image == null) {
+            throw new IllegalArgumentException("image required");
+        }
+
+        SQLiteDatabase database = mDbHelper.getWritableDatabase();
+
+        long id = database.insert(ProductEntry.TABLE_NAME, null, values);
+        if (id == -1) {
+            Log.e(LOG_TAG, "row failed " + uri);
+            return null;
+        }
+
+        getContext().getContentResolver().notifyChange(uri, null);
+
+        return ContentUris.withAppendedId(uri, id);
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues contentValues, String selection,
+                      String[] selectionArgs) {
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case PRODUCTS:
+                return updateProduct(uri, contentValues, selection, selectionArgs);
+            case PRODUCT_ID:
+
+                selection = ProductEntry._ID + "=?";
+                selectionArgs = new String[] { String.valueOf(ContentUris.parseId(uri)) };
+                return updateProduct(uri, contentValues, selection, selectionArgs);
+            default:
+                throw new IllegalArgumentException("Update is not supported for " + uri);
+        }
+    }
+
+
+    private int updateProduct(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+
+        if (values.containsKey(ProductEntry.COLUMN_PRODUCT_NAME)) {
+            String name = values.getAsString(ProductEntry.COLUMN_PRODUCT_NAME);
+            if (name == null) {
+                throw new IllegalArgumentException("Name required");
+            }
+        }
+
+        if (values.containsKey(ProductEntry.COLUMN_PRODUCT_QUANTITY)) {
+            Integer quantity = values.getAsInteger(ProductEntry.COLUMN_PRODUCT_QUANTITY);
+            if (quantity != null && quantity < 0) {
+                throw new IllegalArgumentException("quantity required");
+            }
+        }
+
+        if (values.containsKey(ProductEntry.COLUMN_PRODUCT_PRICE)) {
+        Integer price = values.getAsInteger(ProductEntry.COLUMN_PRODUCT_PRICE);
+            if (price != null && price < 0) {
+                throw new IllegalArgumentException("Price required");
+            }
+        }
+
+
+        if (values.size() == 0) {
+            return 0;
+        }
+
+        SQLiteDatabase database = mDbHelper.getWritableDatabase();
+        int rowsUpdated = database.update(ProductEntry.TABLE_NAME, values, selection, selectionArgs);
+        if (rowsUpdated != 0) {
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+
+        return rowsUpdated;
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        SQLiteDatabase database = mDbHelper.getWritableDatabase();
+
+        int rowsDeleted;
+
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case PRODUCTS:
+                rowsDeleted = database.delete(ProductEntry.TABLE_NAME, selection, selectionArgs);
+                break;
+            case PRODUCT_ID:
+                selection = ProductEntry._ID + "=?";
+                selectionArgs = new String[] { String.valueOf(ContentUris.parseId(uri)) };
+                rowsDeleted = database.delete(ProductEntry.TABLE_NAME, selection, selectionArgs);
+                break;
+            default:
+                throw new IllegalArgumentException("Deletion is not supported for " + uri);
+        }
+
+        if (rowsDeleted != 0) {
+            getContext().getContentResolver().notifyChange(uri, null);
+        }
+
+        return rowsDeleted;
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        final int match = sUriMatcher.match(uri);
+        switch (match) {
+            case PRODUCTS:
+                return ProductEntry.CONTENT_LIST_TYPE;
+            case PRODUCT_ID:
+                return ProductEntry.CONTENT_ITEM_TYPE;
+            default:
+                throw new IllegalStateException("Unknown URI " + uri + " with match " + match);
+        }
+    }
+
+
+}

app/src/main/res/layout/activity_add_product.xml

@@ -0,0 +1,168 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:id="@+id/activity_add_product"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingBottom="@dimen/activity_vertical_margin"
+    android:paddingLeft="@dimen/activity_horizontal_margin"
+    android:paddingRight="@dimen/activity_horizontal_margin"
+    android:paddingTop="@dimen/activity_vertical_margin"
+    tools:context="com.example.h_mal.inventoryapp.AddProduct"
+    android:orientation="vertical">
+
+
+    <ImageView
+        android:id="@+id/imageView2"
+        android:layout_width="80dp"
+        android:layout_height="80dp"
+        android:layout_gravity="center"
+        app:srcCompat="@mipmap/ic_launcher" />
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_horizontal_margin">
+
+        <TextView
+            android:text="Image"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textAppearance="@style/TextAppearance.AppCompat" />
+
+        <Button
+            android:text="Browse"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:id="@+id/BrowseImage"
+            android:layout_weight="2" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_horizontal_margin">
+
+        <TextView
+            android:text="Name"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textAppearance="@style/TextAppearance.AppCompat" />
+
+        <EditText
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:inputType="textPersonName"
+            android:hint="Product name"
+            android:ems="10"
+            android:id="@+id/productName"
+            android:layout_weight="2" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:paddingBottom="@dimen/activity_horizontal_margin">
+
+        <TextView
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="quantity"
+            android:textAppearance="@style/TextAppearance.AppCompat" />
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="2"
+            android:orientation="horizontal">
+
+            <Button
+                android:id="@+id/buttonMinus"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="-" />
+
+            <EditText
+                android:id="@+id/productQuantity"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="4"
+                android:ems="10"
+                android:hint="Quantity"
+                android:inputType="number" />
+
+            <Button
+                android:id="@+id/buttonAdd"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1"
+                android:text="+" />
+
+        </LinearLayout>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/activity_horizontal_margin">
+
+        <TextView
+            android:text="Price"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:textAppearance="@style/TextAppearance.AppCompat" />
+
+        <TextView
+            android:text="£"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:id="@+id/textView8"
+            android:layout_weight="1"
+            android:textAlignment="center"
+            android:textAppearance="@style/TextAppearance.AppCompat.Body1" />
+
+        <EditText
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:inputType="number"
+            android:hint="Price"
+            android:ems="10"
+            android:layout_weight="4"
+            android:id="@+id/productPrice" />
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:orientation="horizontal"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content">
+
+        <ImageButton
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            app:srcCompat="@android:drawable/ic_dialog_email"
+            android:id="@+id/ContactSupplier"
+            android:layout_weight="1" />
+
+        <Button
+            android:text="submit"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:id="@+id/submit"
+            android:layout_weight="2" />
+
+    </LinearLayout>
+</LinearLayout>

app/src/main/res/layout/activity_main.xml

@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <ListView
+        android:id="@+id/list_item_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+    </ListView>
+
+    <RelativeLayout
+        android:id="@+id/empty_view"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_centerInParent="true">
+
+        <TextView
+            android:id="@+id/empty_title_text"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_centerHorizontal="true"
+            android:fontFamily="sans-serif-medium"
+            android:paddingTop="16dp"
+            android:text="Inventory list empty"
+            android:textAppearance="?android:textAppearanceMedium"/>
+
+        <TextView
+            android:id="@+id/empty_subtitle_text"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_below="@+id/empty_title_text"
+            android:layout_centerHorizontal="true"
+            android:fontFamily="sans-serif"
+            android:paddingTop="8dp"
+            android:text="add products to begin"
+            android:textAppearance="?android:textAppearanceSmall"
+            android:textColor="#A2AAB0"/>
+    </RelativeLayout>
+
+    <android.support.design.widget.FloatingActionButton
+        android:id="@+id/fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_margin="@dimen/fab_margin"
+        android:layout_alignParentBottom="true"
+        android:layout_alignParentRight="true"
+        android:src="@android:drawable/ic_menu_add" />
+
+</RelativeLayout>

app/src/main/res/layout/list_item.xml

@@ -0,0 +1,99 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:orientation="horizontal"
+    android:layout_width="match_parent"
+    android:layout_height="112sp"
+    android:padding="@dimen/activity_horizontal_margin">
+
+    <ImageView
+        android:layout_width="80dp"
+        android:layout_height="80dp"
+        android:scaleType="fitCenter"
+        app:srcCompat="@mipmap/ic_launcher"
+        android:id="@+id/imageView" />
+
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+
+        <LinearLayout
+            android:layout_height="match_parent"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <TextView
+                android:id="@+id/Product"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_marginLeft="30dp"
+                android:layout_marginStart="30dp"
+                android:layout_weight="1"
+                android:gravity="center"
+                android:text="Product Name" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_marginLeft="30dp"
+                android:layout_marginStart="30dp"
+                android:layout_weight="1"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textView2"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Price: £ " />
+
+                <TextView
+                    android:id="@+id/price"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="00.00" />
+            </LinearLayout>
+
+        </LinearLayout>
+
+        <LinearLayout
+            android:layout_width="0dp"
+            android:layout_height="match_parent"
+            android:layout_weight="1"
+            android:orientation="vertical">
+
+            <Button
+                android:id="@+id/button"
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:text="Sell" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="0dp"
+                android:layout_weight="1"
+                android:gravity="center"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:id="@+id/textView4"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Quantity: " />
+
+                <TextView
+                    android:id="@+id/Qn"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="Qn" />
+
+            </LinearLayout>
+        </LinearLayout>
+    </LinearLayout>
+
+
+</LinearLayout>

app/src/main/res/menu/menu_editor.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2016 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<!-- Options menu for the EditorActivity -->
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context=".EditorActivity">
+
+    <item
+        android:id="@+id/action_delete"
+        android:title="@string/delete_item"
+        app:showAsAction="never" />
+</menu>

app/src/main/res/menu/menu_main.xml

@@ -0,0 +1,15 @@
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context="com.example.h_mal.inventoryapp.MainActivity">
+    <item
+        android:id="@+id/action_settings"
+        android:orderInCategory="100"
+        android:title="delete all data"
+        app:showAsAction="never" />
+    <item
+        android:id="@+id/insert_placeholder_data"
+        android:orderInCategory="100"
+        android:title="insert test data"
+        app:showAsAction="never" />
+</menu>

app/src/main/res/values-v21/styles.xml

@@ -0,0 +1,9 @@
+<resources>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+        <item name="android:windowDrawsSystemBarBackgrounds">true</item>
+        <item name="android:statusBarColor">@android:color/transparent</item>
+    </style>
+</resources>

app/src/main/res/values-w820dp/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Example customization of dimensions originally defined in res/values/dimens.xml
+         (such as screen margins) for screens with more than 820dp of available width. This
+         would include 7" and 10" devices in landscape (~960dp and ~1280dp respectively). -->
+    <dimen name="activity_horizontal_margin">64dp</dimen>
+</resources>

app/src/main/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="colorPrimary">#3F51B5</color>
+    <color name="colorPrimaryDark">#303F9F</color>
+    <color name="colorAccent">#FF4081</color>
+</resources>

app/src/main/res/values/dimens.xml

@@ -0,0 +1,6 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+    <dimen name="fab_margin">16dp</dimen>
+</resources>

app/src/main/res/values/strings.xml

@@ -0,0 +1,12 @@
+<resources>
+    <string name="app_name">Inventory app</string>
+    <string name="action_settings">Settings</string>
+    <string name="add_product_title">Add Product</string>
+    <string name="edit_product_title">Edit product</string>
+    <string name="insert_product_failed">Inserting product failed</string>
+    <string name="insert_product_successful">Product added</string>
+    <string name="update_product_failed">Product update failed</string>
+    <string name="update_product_successful">Product updated successful</string>
+    <string name="save_item">Save product</string>
+    <string name="delete_item">Delete product</string>
+</resources>

app/src/main/res/values/styles.xml

@@ -0,0 +1,20 @@
+<resources>
+
+    <!-- Base application theme. -->
+    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
+        <!-- Customize your theme here. -->
+        <item name="colorPrimary">@color/colorPrimary</item>
+        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
+        <item name="colorAccent">@color/colorAccent</item>
+    </style>
+
+    <style name="AppTheme.NoActionBar">
+        <item name="windowActionBar">false</item>
+        <item name="windowNoTitle">true</item>
+    </style>
+
+    <style name="AppTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
+
+    <style name="AppTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
+
+</resources>

app/src/test/java/com/example/h_mal/inventoryapp/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.example.h_mal.inventoryapp;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() throws Exception {
+        assertEquals(4, 2 + 2);
+    }
+}

build.gradle

@@ -0,0 +1,23 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:2.3.1'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}

gradle.properties

@@ -0,0 +1,17 @@
+# Project-wide Gradle settings.
+
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx1536m
+
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Fri Apr 07 21:02:58 BST 2017
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.3-all.zip

gradlew

@@ -0,0 +1,160 @@
+#!/usr/bin/env bash
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS=""
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn ( ) {
+    echo "$*"
+}
+
+die ( ) {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+esac
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Split up the JVM_OPTS And GRADLE_OPTS values into an array, following the shell quoting and substitution rules
+function splitJvmOpts() {
+    JVM_OPTS=("$@")
+}
+eval splitJvmOpts $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS
+JVM_OPTS[${#JVM_OPTS[*]}]="-Dorg.gradle.appname=$APP_BASE_NAME"
+
+exec "$JAVACMD" "${JVM_OPTS[@]}" -classpath "$CLASSPATH" org.gradle.wrapper.GradleWrapperMain "$@"

gradlew.bat

@@ -0,0 +1,90 @@
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS=
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windowz variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+if "%@eval[2+2]" == "4" goto 4NT_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+goto execute
+
+:4NT_args
+@rem Get arguments from the 4NT Shell from JP Software
+set CMD_LINE_ARGS=%$
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+include ':app'