display all app icons in a grid

app/build.gradle

@@ -28,6 +28,7 @@ dependencies {
     compile fileTree(dir: 'libs', include: ['*.jar'])
     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:23.4.0'
+    compile 'com.android.support:recyclerview-v7:23.4.0'
     compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
 }
 

app/src/main/kotlin/com/simplemobiletools/applauncher/activities/MainActivity.kt

@@ -1,18 +1,38 @@
 package com.simplemobiletools.applauncher.activities
 
 import android.content.Intent
+import android.content.pm.PackageManager
 import android.os.Bundle
 import android.view.Menu
 import android.view.MenuItem
 import com.simplemobiletools.applauncher.R
+import com.simplemobiletools.applauncher.adapters.LaunchersAdapter
 import com.simplemobiletools.applauncher.extensions.isFirstRun
 import com.simplemobiletools.applauncher.extensions.preferences
+import com.simplemobiletools.applauncher.models.AppLauncher
+import kotlinx.android.synthetic.main.activity_main.*
+import java.util.*
 
 class MainActivity : SimpleActivity() {
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
+        fillGrid()
+    }
+
+    private fun fillGrid() {
+        val apps = ArrayList<AppLauncher>()
+        val pm = this.packageManager
+        val intent = Intent(Intent.ACTION_MAIN, null)
+        intent.addCategory(Intent.CATEGORY_LAUNCHER)
+        val list = pm.queryIntentActivities(intent, PackageManager.PERMISSION_GRANTED)
+        for (info in list) {
+            val componentInfo = info.activityInfo.applicationInfo
+            apps.add(AppLauncher(componentInfo.loadLabel(pm).toString(), componentInfo.loadIcon(pm)))
+        }
+
+        launchers_holder.adapter = LaunchersAdapter(apps)
     }
 
     override fun onCreateOptionsMenu(menu: Menu?): Boolean {

app/src/main/kotlin/com/simplemobiletools/applauncher/adapters/LaunchersAdapter.kt

@@ -0,0 +1,34 @@
+package com.simplemobiletools.applauncher.adapters
+
+import android.support.v7.widget.RecyclerView
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import com.simplemobiletools.applauncher.R
+import com.simplemobiletools.applauncher.models.AppLauncher
+import kotlinx.android.synthetic.main.app_launcher_item.view.*
+import java.util.*
+
+class LaunchersAdapter(val launchers: ArrayList<AppLauncher>) : RecyclerView.Adapter<LaunchersAdapter.ViewHolder>() {
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        holder.bindView(launchers[position])
+    }
+
+    override fun onCreateViewHolder(parent: ViewGroup?, viewType: Int): ViewHolder {
+        val view = LayoutInflater.from(parent?.context).inflate(R.layout.app_launcher_item, parent, false)
+        return ViewHolder(view)
+    }
+
+    override fun getItemCount(): Int {
+        return launchers.count()
+    }
+
+    class ViewHolder(view: View) : RecyclerView.ViewHolder(view) {
+        fun bindView(launcher: AppLauncher) {
+            with(launcher) {
+                itemView.launcher_label.text = launcher.name
+                itemView.launcher_icon.setImageDrawable(launcher.icon)
+            }
+        }
+    }
+}

app/src/main/kotlin/com/simplemobiletools/applauncher/models/AppLauncher.kt

@@ -0,0 +1,5 @@
+package com.simplemobiletools.applauncher.models
+
+import android.graphics.drawable.Drawable
+
+data class AppLauncher(val name: String, val icon: Drawable) { }

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

@@ -1,12 +1,19 @@
 <?xml version="1.0" encoding="utf-8"?>
 <RelativeLayout
+    android:id="@+id/grid_holder"
     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="match_parent"
-    android:padding="@dimen/activity_margin">
+    android:layout_height="match_parent">
+
+    <android.support.v7.widget.RecyclerView
+        android:id="@+id/launchers_holder"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:clipToPadding="false"
+        android:paddingBottom="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin"
+        app:layoutManager="android.support.v7.widget.GridLayoutManager"
+        app:spanCount="@integer/columns"/>
 
-    <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
-        android:text="Hello World!"/>
 </RelativeLayout>

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

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    android:id="@+id/launcher_holder"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="vertical"
+    android:padding="@dimen/launcher_padding">
+
+    <ImageView
+        android:id="@+id/launcher_icon"
+        android:layout_width="@dimen/icon_size"
+        android:layout_height="@dimen/icon_size"
+        android:layout_gravity="center"/>
+
+    <TextView
+        android:id="@+id/launcher_label"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:gravity="center_horizontal|top"
+        android:textSize="@dimen/font_size"/>
+
+</LinearLayout>

app/src/main/res/values-sw400dp/integers.xml

@@ -0,0 +1,3 @@
+<resources>
+    <integer name="columns">5</integer>
+</resources>

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

@@ -3,4 +3,8 @@
     <dimen name="social_padding">8dp</dimen>
     <dimen name="social_logo">40dp</dimen>
     <dimen name="settings_padding">8dp</dimen>
+    <dimen name="launcher_padding">4dp</dimen>
+    <dimen name="icon_size">60dp</dimen>
+
+    <dimen name="font_size">12sp</dimen>
 </resources>

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

@@ -0,0 +1,3 @@
+<resources>
+    <integer name="columns">4</integer>
+</resources>