Initial commit

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.haimalik.myapplication"
+        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(include: ['*.jar'], dir: 'libs')
+    compile 'com.android.support:appcompat-v7:25.3.0'
+    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+}

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\HAIMALIK\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 *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/haimalik/myapplication/ExampleInstrumentedTest.java

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+package com.example.haimalik.myapplication;
+
+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.haimalik.myapplication", 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.haimalik.myapplication">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/haimalik/myapplication/MainActivity.java

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+package com.example.haimalik.myapplication;
+
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.support.v7.app.AppCompatActivity;
+import android.os.Bundle;
+import android.text.Editable;
+import android.text.TextUtils;
+import android.text.TextWatcher;
+import android.util.Log;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.EditText;
+import android.widget.Spinner;
+import android.widget.AdapterView.OnItemSelectedListener;
+
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.net.HttpURLConnection;
+
+import java.net.MalformedURLException;
+import java.nio.charset.Charset;
+import java.text.DecimalFormat;
+
+public class MainActivity extends AppCompatActivity {
+
+    EditText currencyOneEditText;
+    EditText currencyTwoEditText;
+    Spinner spinnerTop;
+    Spinner spinnerBottom;
+    double conversionRateOne;
+
+    private String URL = "https://free.currencyconverterapi.com/api/v3/convert?";
+
+    private static final String LOG_TAG = MainActivity.class.getSimpleName();
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_main);
+
+        currencyOneEditText = (EditText) findViewById(R.id.editText);
+        currencyTwoEditText = (EditText) findViewById(R.id.editText2);
+
+        currencyOneEditText.addTextChangedListener(TextWatcherClass);
+        currencyTwoEditText.addTextChangedListener(TextWatcherClass2);
+
+
+
+        addListenerOnSpinnerItemSelection();
+
+        String stringURL = UriBuilder();
+        MyAsyncTask task = new MyAsyncTask();
+        task.execute(stringURL);
+    }
+
+
+    private TextWatcher TextWatcherClass = new TextWatcher() {
+
+        @Override
+        public void onTextChanged(CharSequence s, int start, int before,
+                                  int count) {
+            currencyTwoEditText.removeTextChangedListener(TextWatcherClass2);
+            if(currencyOneEditText.getText().toString().isEmpty()){
+                currencyTwoEditText.setText("");
+                return;
+            }
+
+        }
+
+        @Override
+        public void beforeTextChanged(CharSequence s, int start, int count,
+                                      int after) {
+        }
+
+        @Override
+        public void afterTextChanged(Editable s) {
+
+            try{
+
+            Double topValue = Double.parseDouble(currencyOneEditText.getText().toString());
+            Double bottomValue = topValue * conversionRateOne;
+            DecimalFormat df = new DecimalFormat("#.##");
+            bottomValue = Double.valueOf(df.format(bottomValue));
+            currencyTwoEditText.setText(bottomValue.toString());
+
+
+            }
+            catch (NumberFormatException e){
+                Log.e(LOG_TAG, "no numbers inserted");
+            }
+            currencyTwoEditText.addTextChangedListener(TextWatcherClass2);
+        }
+
+    };
+
+    private TextWatcher TextWatcherClass2 = new TextWatcher() {
+
+        @Override
+        public void onTextChanged(CharSequence s, int start, int before,
+                                  int count) {
+            currencyOneEditText.removeTextChangedListener(TextWatcherClass);
+            if(currencyTwoEditText.getText().toString().isEmpty()){
+                currencyOneEditText.setText("");
+            }
+        }
+
+        @Override
+        public void beforeTextChanged(CharSequence s, int start, int count,
+                                      int after) {
+        }
+
+        @Override
+        public void afterTextChanged(Editable s) {
+
+            try{
+
+            Double bottomValue = Double.parseDouble(currencyTwoEditText.getText().toString());
+            Double topValue = bottomValue * (1 / conversionRateOne);
+            DecimalFormat df = new DecimalFormat("#.##");
+            topValue = Double.valueOf(df.format(topValue));
+            currencyOneEditText.setText(topValue.toString());
+
+
+            }
+            catch (NumberFormatException e){
+                Log.e(LOG_TAG, "no numbers inserted");
+            }
+            currencyOneEditText.addTextChangedListener(TextWatcherClass);
+        }
+
+    };
+
+    public void addListenerOnSpinnerItemSelection() {
+        spinnerTop = (Spinner) findViewById(R.id.spinner1);
+        spinnerTop.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int pos, long id) {
+                String currencyOne = parentView.getItemAtPosition(pos).toString();
+                currencyTwoEditText.setText("");
+                currencyOneEditText.setText("");
+                currencyOneEditText.setHint("insert " + currencyOne);
+
+                String stringURL = UriBuilder();
+                MyAsyncTask task = new MyAsyncTask();
+                task.execute(stringURL);
+
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parentView) {
+                // your code here
+            }
+
+        });
+
+        spinnerBottom = (Spinner) findViewById(R.id.spinner2);
+        spinnerBottom.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int pos, long id) {
+                String currencyTwo = parentView.getItemAtPosition(pos).toString();
+                currencyOneEditText.setText("");
+                currencyTwoEditText.setText("");
+                currencyTwoEditText.setHint("insert " + currencyTwo);
+
+                String stringURL = UriBuilder();
+                MyAsyncTask task = new MyAsyncTask();
+                task.execute(stringURL);
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parentView) {
+                // your code here
+            }
+
+        });
+
+    }
+
+    private String UriBuilder(){
+        String currencyOne = spinnerTop.getSelectedItem().toString();
+        String currencyTwo = spinnerBottom.getSelectedItem().toString();
+
+        Uri baseUri = Uri.parse(URL);
+        Uri.Builder builder = baseUri.buildUpon();
+        builder.appendQueryParameter("q", currencyOne + "_" + currencyTwo).appendQueryParameter("compact", "ultra");
+
+        return builder.build().toString();
+
+    }
+
+    private static URL createUrl(String stringUrl) {
+        URL url = null;
+        try {
+            url = new URL(stringUrl);
+        } catch (MalformedURLException e) {
+            Log.e(LOG_TAG, "Error with creating URL ", e);
+        }
+        return url;
+    }
+
+
+    private static String makeHttpRequest(URL url) throws IOException {
+        String jsonResponse = "";
+
+        if (url == null) {
+            return jsonResponse;
+        }
+
+        HttpURLConnection urlConnection = null;
+        InputStream inputStream = null;
+        try {
+            urlConnection = (HttpURLConnection) url.openConnection();
+            urlConnection.setReadTimeout(30000);
+            urlConnection.setConnectTimeout(30000);
+            urlConnection.setRequestMethod("GET");
+            urlConnection.connect();
+
+            if (urlConnection.getResponseCode() == 200) {
+                inputStream = urlConnection.getInputStream();
+                jsonResponse = readFromStream(inputStream);
+            } else {
+                Log.e(LOG_TAG, "Error response code: " + urlConnection.getResponseCode());
+            }
+        } catch (IOException e) {
+            Log.e(LOG_TAG, "Problem retrieving the JSON results.", e);
+        } finally {
+            if (urlConnection != null) {
+                urlConnection.disconnect();
+            }
+            if (inputStream != null) {
+                inputStream.close();
+            }
+        }
+        return jsonResponse;
+    }
+
+    private static String readFromStream(InputStream inputStream) throws IOException {
+        StringBuilder output = new StringBuilder();
+        if (inputStream != null) {
+            InputStreamReader inputStreamReader = new InputStreamReader(inputStream, Charset.forName("UTF-8"));
+            BufferedReader reader = new BufferedReader(inputStreamReader);
+            String line = "";
+            while (line != null) {
+                output.append(line);
+                line = reader.readLine();
+            }
+        }
+        Log.d(LOG_TAG, output.toString());
+        return output.toString();
+
+    }
+
+    private double extractFeatureFromJson(String newsJSON) {
+        double conversionValue = 0.00;
+        String currencyOne = spinnerTop.getSelectedItem().toString();
+        String currencyTwo = spinnerBottom.getSelectedItem().toString();
+
+        if (TextUtils.isEmpty(newsJSON)) {
+            return 0.00;
+        }
+
+        try {
+            JSONObject jObject = new JSONObject(newsJSON);
+            conversionValue = jObject.getDouble(currencyOne + "_" + currencyTwo);
+
+        } catch (JSONException e) {
+
+            Log.e("MainActivity", "Problem parsing the JSON results", e);
+        }
+        return conversionValue;
+    }
+
+    private class MyAsyncTask extends AsyncTask<String, Void, Double> {
+
+        @Override
+        protected Double doInBackground(String... urlString) {
+            String jsonResponse = null;
+            if (urlString.length < 1 || urlString[0] == null) {
+                return null;
+            }
+            try {
+                URL url = createUrl(urlString[0]);
+                jsonResponse = makeHttpRequest(url);
+
+            } catch (IOException e) {
+                Log.e(LOG_TAG, "Problem making the HTTP request.", e);
+            }
+
+
+            return extractFeatureFromJson(jsonResponse);
+
+        }
+
+        @Override
+        protected void onPostExecute(Double result) {
+            super.onPostExecute(result);
+
+            conversionRateOne = result;
+
+        }
+
+    }
+
+}

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

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+<?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"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    tools:context="com.example.haimalik.myapplication.MainActivity"
+    android:layout_margin="10dp">
+
+    <LinearLayout
+        android:layout_width="368dp"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <Spinner
+            android:id="@+id/spinner1"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:entries="@array/currency_arrays" />
+
+        <EditText
+            android:id="@+id/editText"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="7"
+            android:ems="10"
+            android:hint="Insert pounds"
+            android:selectAllOnFocus="true"
+            android:inputType="numberDecimal" />
+
+    </LinearLayout>;
+
+    <LinearLayout
+        android:layout_width="368dp"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+        <Spinner
+            android:id="@+id/spinner2"
+            android:layout_width="wrap_content"
+            android:layout_height="match_parent"
+            android:entries="@array/currency_arrays" />
+
+        <EditText
+            android:id="@+id/editText2"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="7"
+            android:ems="10"
+            android:selectAllOnFocus="true"
+            android:inputType="numberDecimal" />
+
+    </LinearLayout>
+
+</LinearLayout>

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

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+<?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/strings.xml

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+<resources>
+    <string name="app_name">Currency Converter</string>
+
+    <string-array name="currency_arrays">
+        <item>ALL</item>
+        <item>AED</item>
+        <item>AFN</item>
+        <item>AMD</item>
+        <item>ANG</item>
+        <item>AOA</item>
+        <item>ARS</item>
+        <item>AUD</item>
+        <item>AWG</item>
+        <item>AZN</item>
+        <item>BAM</item>
+        <item>BBD</item>
+        <item>BDT</item>
+        <item>BGN</item>
+        <item>BHD</item>
+        <item>BIF</item>
+        <item>BND</item>
+        <item>BOB</item>
+        <item>BRL</item>
+        <item>BSD</item>
+        <item>BTC</item>
+        <item>BTN</item>
+        <item>BWP</item>
+        <item>BYR</item>
+        <item>BZD</item>
+        <item>CAD</item>
+        <item>CDF</item>
+        <item>CHF</item>
+        <item>CLP</item>
+        <item>CNY</item>
+        <item>COP</item>
+        <item>CRC</item>
+        <item>CUP</item>
+        <item>CVE</item>
+        <item>CZK</item>
+        <item>DJF</item>
+        <item>DKK</item>
+        <item>DOP</item>
+        <item>DZD</item>
+        <item>EGP</item>
+        <item>ERN</item>
+        <item>ETB</item>
+        <item>EUR</item>
+        <item>FJD</item>
+        <item>FKP</item>
+        <item>GBP</item>
+        <item>GEL</item>
+        <item>GHS</item>
+        <item>GIP</item>
+        <item>GMD</item>
+        <item>GNF</item>
+        <item>GTQ</item>
+        <item>GYD</item>
+        <item>HKD</item>
+        <item>HNL</item>
+        <item>HRK</item>
+        <item>HTG</item>
+        <item>HUF</item>
+        <item>IDR</item>
+        <item>ILS</item>
+        <item>INR</item>
+        <item>IQD</item>
+        <item>IRR</item>
+        <item>ISK</item>
+        <item>JMD</item>
+        <item>JOD</item>
+        <item>JPY</item>
+        <item>KES</item>
+        <item>KGS</item>
+        <item>KHR</item>
+        <item>KMF</item>
+        <item>KPW</item>
+        <item>KRW</item>
+        <item>KWD</item>
+        <item>KYD</item>
+        <item>KZT</item>
+        <item>LAK</item>
+        <item>LBP</item>
+        <item>LKR</item>
+        <item>LRD</item>
+        <item>LSL</item>
+        <item>LVL</item>
+        <item>LYD</item>
+        <item>MAD</item>
+        <item>MDL</item>
+        <item>MGA</item>
+        <item>MKD</item>
+        <item>MMK</item>
+        <item>MNT</item>
+        <item>MOP</item>
+        <item>MRO</item>
+        <item>MUR</item>
+        <item>MVR</item>
+        <item>MWK</item>
+        <item>MXN</item>
+        <item>MYR</item>
+        <item>MZN</item>
+        <item>NAD</item>
+        <item>NGN</item>
+        <item>NIO</item>
+        <item>NOK</item>
+        <item>NPR</item>
+        <item>NZD</item>
+        <item>OMR</item>
+        <item>PAB</item>
+        <item>PEN</item>
+        <item>PGK</item>
+        <item>PHP</item>
+        <item>PKR</item>
+        <item>PLN</item>
+        <item>PYG</item>
+        <item>QAR</item>
+        <item>RON</item>
+        <item>RSD</item>
+        <item>RUB</item>
+        <item>RWF</item>
+        <item>SAR</item>
+        <item>SBD</item>
+        <item>SCR</item>
+        <item>SDG</item>
+        <item>SEK</item>
+        <item>SGD</item>
+        <item>SHP</item>
+        <item>SLL</item>
+        <item>SOS</item>
+        <item>SRD</item>
+        <item>STD</item>
+        <item>SYP</item>
+        <item>SZL</item>
+        <item>THB</item>
+        <item>TJS</item>
+        <item>TMT</item>
+        <item>TND</item>
+        <item>TOP</item>
+        <item>TRY</item>
+        <item>TTD</item>
+        <item>TWD</item>
+        <item>TZS</item>
+        <item>UAH</item>
+        <item>UGX</item>
+        <item>USD</item>
+        <item>UYU</item>
+        <item>UZS</item>
+        <item>VEF</item>
+        <item>VND</item>
+        <item>VUV</item>
+        <item>WST</item>
+        <item>XAF</item>
+        <item>XCD</item>
+        <item>XDR</item>
+        <item>XOF</item>
+        <item>XPF</item>
+        <item>YER</item>
+        <item>ZAR</item>
+        <item>ZMW</item>
+
+    </string-array>
+</resources>

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

@@ -0,0 +1,11 @@
+<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>
+
+</resources>

app/src/test/java/com/example/haimalik/myapplication/ExampleUnitTest.java

@@ -0,0 +1,17 @@
+package com.example.haimalik.myapplication;
+
+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);
+    }
+}