New commit with added features:

- filter list
 - new list item layout

app/build.gradle

@@ -8,7 +8,7 @@ android {
     compileSdkVersion 28
     defaultConfig {
         applicationId "com.example.h_mal.myapplication"
-        minSdkVersion 15
+        minSdkVersion 23
         targetSdkVersion 28
         versionCode 1
         versionName "1.0"
@@ -33,4 +33,5 @@ dependencies {
     implementation 'com.squareup.okhttp3:okhttp:4.2.1'
     implementation 'com.google.code.gson:gson:2.8.5'
     androidTestImplementation 'com.android.support.test:rules:1.0.2'
+    implementation 'com.android.support:cardview-v7:28.0.0'
 }

app/src/main/java/com/example/h_mal/myapplication/ListViewAdapter.kt

@@ -1,28 +1,86 @@
 package com.example.h_mal.myapplication
 
 import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.net.UrlQuerySanitizer
+import android.opengl.Visibility
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
 import android.widget.ArrayAdapter
+import android.widget.Filter
 import com.example.h_mal.myapplication.model.JsonObject
 import kotlinx.android.synthetic.main.repo_list_item.view.*
 
+//custom list adapter extends from array adater
 class ListViewAdapter(context: Context, objects: MutableList<JsonObject>) :
     ArrayAdapter<JsonObject>(context, 0, objects){
 
+    //populate each view
     override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
+        //if the current view is null then inflate our list item object into list
         var view: View? = convertView
         if (view == null) {
-            view = LayoutInflater.from(context).inflate(R.layout.repo_list_item, parent, false)
+            view = LayoutInflater.from(context).inflate(R.layout.repo_list_item, parent, false)!!
         }
 
+        //get the current item from the current position
         val item = getItem(position)
 
-        view?.name?.text = item?.name
-        view?.description?.text = item?.description
+        //set name and description
+        view.name?.text = item?.name
+        view.description?.text = item?.description
 
+        //parse date from the date time string and set the date
+        val dateString = item?.date?.split('T')?.get(0)
+        view.date?.text = dateString
 
-        return view!!
+        //check if the language object is null
+        if (item.language != null){
+            //language exists in object
+            //view holdin the language to be visible
+            view.lang_layout.visibility = View.VISIBLE
+
+            //language text and corresponding colour according to github is applied
+            view.lang?.text = item.language
+            getColor(item.language)?.let { it1 -> view.lang_col.setCardBackgroundColor(it1) }
+        }else{
+            //language was null therefore view to be hidden
+            view.lang_layout.visibility = View.GONE
+        }
+
+        //apply on click listener to item
+        view.setOnClickListener{
+            //click item opens then url
+            openLink(item.repoUrlString)
+        }
+
+        return view
+    }
+
+    //function for opening the link
+    fun openLink(urlString : String?){
+        //open link to repo if the url is not nu;;
+        if (urlString != null){
+            val openURL =  Intent(Intent.ACTION_VIEW)
+            openURL.data = Uri.parse(urlString)
+            context.startActivity(openURL)
+        }
+
+    }
+
+    //get the corresponding colour based on the programming language
+    fun getColor(language: String?) : Int?{
+        return when(language) {
+            "Ruby" -> context.getColor(R.color.Ruby)
+            "Java"-> context.getColor(R.color.Java)
+            "Objective-C" -> context.getColor(R.color.ObjectiveC)
+            "JavaScript" -> context.getColor(R.color.JavaScript)
+            "CSS" -> context.getColor(R.color.CSS)
+            "Shell" -> context.getColor(R.color.Shell)
+            //if the language has no match return nothing
+            else -> null
+        }
     }
 }

app/src/main/java/com/example/h_mal/myapplication/MainActivity.kt

@@ -4,6 +4,10 @@ import android.content.Context
 import android.support.v7.app.AppCompatActivity
 import android.os.Bundle
 import android.support.v4.widget.SwipeRefreshLayout
+import android.view.Menu
+import android.view.MenuInflater
+import android.view.MenuItem
+import android.widget.SearchView
 import com.example.h_mal.myapplication.model.JsonObject
 import com.google.gson.Gson
 import kotlinx.android.synthetic.main.activity_main.*
@@ -12,49 +16,101 @@ import java.io.IOException
 
 
 class MainActivity : AppCompatActivity() {
-    lateinit var thecontext: Context
+    lateinit var searchView: SearchView
+
+    val urlString = "https://api.github.com/orgs/square/repos"
 
-    companion object{
-        val urlString = "https://api.github.com/orgs/square/repos"
-    }
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        thecontext = this
-
+        //begin populating list
         executeTask()
 
+        //set a listener for the swipe to refresh
         swipe_refresh.setOnRefreshListener(swipeRefreshListener)
     }
 
+    //implement search interface in the menu
+    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
+        //inflate custom menu as our menu
+        menuInflater.inflate(R.menu.menu, menu)
+        //extract searchview
+        val searchItem = menu?.findItem(R.id.search)
+        //set searchview globally
+        searchView = searchItem?.actionView as SearchView
+
+        return true
+    }
+
     val swipeRefreshListener = SwipeRefreshLayout.OnRefreshListener{
+        //populate list when pulling to refresh
         executeTask()
     }
 
     fun executeTask(){
+        //clear list before populating
+        list_view.adapter = null
+
+        //create url from url string urlstring
         val url = Request.Builder().url(urlString).build()
+        //create a okhttpclient for a get request from url
         val client = OkHttpClient()
 
+        //call the url and retrieve its callback
         client.newCall(url).enqueue(object: Callback {
+            //failure of retrieval callback
             override fun onFailure(call: Call, e: IOException) {
+                //print error to log
                 System.err.println(e)
-
+                //if swipe refresh is refreshing then stop
                 swipe_refresh.isRefreshing = false
+                //list is empty
             }
 
+            //successful retrieval callback
             override fun onResponse(call: Call, response: Response) {
+                //get the JSON from the body
                 val urlResponse = response.body?.string()
 
+                //print the response to the logs
                 println("response = $urlResponse")
 
+                //create gson object
                 val gson = Gson()
+                //create a mutable list of objects extracted from the json text
                 val objectList = gson.fromJson(urlResponse, Array<JsonObject>::class.java).asList().toMutableList()
 
-                runOnUiThread{
-                    list_view.adapter = ListViewAdapter(thecontext, objectList)
-                    swipe_refresh.isRefreshing = false
+                if (objectList.size >0){
+                    //update the ui
+                    runOnUiThread{
+                        //custom list view adapter created
+                        val adapterLV = ListViewAdapter(baseContext, objectList)
+                        //apply adapter to listview
+                        list_view.adapter = adapterLV
+                        //if swipe refresh is refreshing then stop
+                        swipe_refresh.isRefreshing = false
+
+                        //search view has its query change listener applied
+                        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener{
+
+                            override fun onQueryTextSubmit(query: String?): Boolean {
+
+                                return true
+                            }
+
+                            //as the test is changed the list is filtered
+                            override fun onQueryTextChange(newText: String?): Boolean {
+                                //filter list function
+                                adapterLV.filter.filter(newText)
+
+                                return true
+                            }
+                        })
+                    }
+                }else{
+                    //list is empty
                 }
 
             }

app/src/main/java/com/example/h_mal/myapplication/model/JsonObject.kt

@@ -9,6 +9,8 @@ data class JsonObject(
     var description : String? = null,
     @SerializedName("language")
     var language : String? = null,
+    @SerializedName("created_at")
+    var date : String? = null,
     @SerializedName("html_url")
     var repoUrlString : String? = null
 )

app/src/main/res/drawable/ic_search_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M15.5,14h-0.79l-0.28,-0.27C15.41,12.59 16,11.11 16,9.5 16,5.91 13.09,3 9.5,3S3,5.91 3,9.5 5.91,16 9.5,16c1.61,0 3.09,-0.59 4.23,-1.57l0.27,0.28v0.79l5,4.99L20.49,19l-4.99,-5zM9.5,14C7.01,14 5,11.99 5,9.5S7.01,5 9.5,5 14,7.01 14,9.5 11.99,14 9.5,14z"/>
+</vector>

app/src/main/res/drawable/ic_search_white_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M15.5,14h-0.79l-0.28,-0.27C15.41,12.59 16,11.11 16,9.5 16,5.91 13.09,3 9.5,3S3,5.91 3,9.5 5.91,16 9.5,16c1.61,0 3.09,-0.59 4.23,-1.57l0.27,0.28v0.79l5,4.99L20.49,19l-4.99,-5zM9.5,14C7.01,14 5,11.99 5,9.5S7.01,5 9.5,5 14,7.01 14,9.5 11.99,14 9.5,14z"/>
+</vector>

app/src/main/res/drawable/ic_sort_black_24dp.xml

@@ -0,0 +1,5 @@
+<vector android:height="24dp" android:tint="#FFFFFF"
+    android:viewportHeight="24.0" android:viewportWidth="24.0"
+    android:width="24dp" xmlns:android="http://schemas.android.com/apk/res/android">
+    <path android:fillColor="#FF000000" android:pathData="M3,18h6v-2L3,16v2zM3,6v2h18L21,6L3,6zM3,13h12v-2L3,11v2z"/>
+</vector>

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

@@ -19,4 +19,6 @@
 
     </android.support.v4.widget.SwipeRefreshLayout>
 
+    <TextView android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+
 </android.support.constraint.ConstraintLayout>

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

@@ -1,18 +1,83 @@
 <?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">
-    <TextView
-            android:hint="name"
-            android:layout_margin="12dp"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content" tools:layout_editor_absoluteY="16dp"
-            tools:layout_editor_absoluteX="16dp" android:id="@+id/name"/>
-    <TextView
-            android:hint="description"
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+             xmlns:app="http://schemas.android.com/apk/res-auto"
+             android:layout_width="match_parent"
+             android:layout_height="wrap_content"
+             xmlns:tools="http://schemas.android.com/tools">
+
+
+    <android.support.v7.widget.CardView
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
             android:layout_marginLeft="12dp"
-            android:layout_below="@id/name"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content" tools:layout_editor_absoluteY="44dp"
-            tools:layout_editor_absoluteX="16dp" android:id="@+id/description"/>
-</RelativeLayout>
+            android:layout_marginTop="6dp"
+            android:layout_marginRight="12dp"
+            android:layout_marginBottom="6dp"
+            app:cardCornerRadius="12dp">
+
+        <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="match_parent"
+                android:layout_margin="16dp"
+                android:orientation="vertical">
+
+            <LinearLayout
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:orientation="horizontal">
+
+                <TextView
+                        android:id="@+id/name"
+                        android:layout_width="0dp"
+                        android:layout_height="wrap_content"
+                        android:layout_weight="3"
+                        android:textSize="22sp"
+                        android:textStyle="bold"
+                        android:textColor="#30ABC5"
+                        tools:text="Name of repo" />
+
+                <TextView
+                        android:id="@+id/date"
+                        android:layout_width="0dp"
+                        android:layout_height="match_parent"
+                        android:gravity="center"
+                        android:layout_weight="1"
+                        tools:text="19/04/2018" />
+
+            </LinearLayout>
+
+            <View android:layout_width="match_parent"
+                  android:layout_height="1dp"
+                  android:backgroundTint="#30ABC5"
+                  android:layout_marginTop="4dp"
+                  android:layout_marginBottom="4dp"/>
+
+            <TextView
+                    android:id="@+id/description"
+                    android:layout_width="wrap_content"
+                    android:layout_height="match_parent"
+                    android:layout_marginLeft="2dp"
+                    android:gravity="center_vertical"
+                    android:textSize="18sp"
+                    tools:text="Multi line description, text and more text then text
+add more text more of a description. Multi line
+description, text and more text then text add
+more text more of a description." />
+
+            <LinearLayout android:id="@+id/lang_layout" android:layout_width="match_parent" android:layout_height="wrap_content"
+            android:layout_marginTop="6dp" android:gravity="right">
+                <TextView android:layout_width="wrap_content" android:layout_height="match_parent"
+                          tools:text="Java" android:gravity="center" android:id="@+id/lang"/>
+                <android.support.v7.widget.CardView
+                        android:layout_width="16dp"
+                        android:layout_height="16dp"
+                        android:layout_marginLeft="4dp"
+                        app:cardCornerRadius="8dp" app:cardBackgroundColor="#E03F3F" android:id="@+id/lang_col"/>
+            </LinearLayout>
+
+
+        </LinearLayout>
+
+    </android.support.v7.widget.CardView>
+
+</FrameLayout>

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:id="@+id/search"
+          android:title="@string/search_title"
+          android:icon="@drawable/ic_search_white_24dp"
+          app:showAsAction="collapseActionView|ifRoom" app:actionViewClass="android.widget.SearchView"/>
+</menu>

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

@@ -1,6 +1,15 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <color name="colorPrimary">#008577</color>
-    <color name="colorPrimaryDark">#00574B</color>
+    <color name="colorPrimary">#30ABC5</color>
+    <color name="colorPrimaryDark">#247E91</color>
     <color name="colorAccent">#D81B60</color>
+
+    <color name="Ruby">#701516</color>
+    <color name="Java">#b07219</color>
+    <color name="ObjectiveC">#438eff</color>
+    <color name="JavaScript">#f1e05a</color>
+    <color name="CSS">#563d7c</color>
+    <color name="Shell">#89e051</color>
+
+
 </resources>

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

@@ -1,3 +1,6 @@
 <resources>
     <string name="app_name">SquareGithubRepo</string>
+    <string name="search_title">Search</string>
+
+
 </resources>