display the initial apps with a default launcher

app/src/main/kotlin/com/simplemobiletools/applauncher/DbHelper.kt

@@ -1,28 +0,0 @@
-package com.simplemobiletools.applauncher
-
-import android.content.Context
-import android.database.sqlite.SQLiteDatabase
-import android.database.sqlite.SQLiteOpenHelper
-
-class DbHelper(context: Context) : SQLiteOpenHelper(context, "launchers.db", null, 1) {
-    val TABLE = "launchers"
-    val CREATE_DB = "CREATE TABLE $TABLE (" +
-            "$ID integer PRIMARY KEY autoincrement," +
-            "$NAME TEXT," +
-            "$PKG_NAME TEXT" +
-            ")"
-
-    companion object {
-        val ID: String = "_id"
-        val NAME: String = "name"
-        val PKG_NAME: String = "pkgName"
-    }
-
-    override fun onCreate(db: SQLiteDatabase) {
-        db.execSQL(CREATE_DB)
-    }
-
-    override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
-
-    }
-}

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

@@ -1,43 +1,25 @@
 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.adapters.MyCursorAdapter
+import com.simplemobiletools.applauncher.databases.DbHelper
 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() {
+    lateinit var dbHelper: DbHelper
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
-        fillGrid()
-    }
+        dbHelper = DbHelper(applicationContext)
+        launchers_holder.adapter = MyCursorAdapter(applicationContext, dbHelper.getLaunchers()) {
 
-    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), componentInfo.packageName))
-        }
-
-        apps.sortBy { it.name }
-        launchers_holder.adapter = LaunchersAdapter(apps) {
-            val launchIntent = packageManager.getLaunchIntentForPackage(it.pkgName)
-            if (launchIntent != null) {
-                startActivity(launchIntent)
-            }
         }
     }
 

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

@@ -1,27 +1,36 @@
 package com.simplemobiletools.applauncher.adapters
 
+import android.content.Context
+import android.database.Cursor
 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.databases.DbHelper
 import com.simplemobiletools.applauncher.models.AppLauncher
 import kotlinx.android.synthetic.main.app_launcher_item.view.*
-import java.util.*
 
-class LaunchersAdapter(val launchers: ArrayList<AppLauncher>, val itemClick: (AppLauncher) -> Unit) :
-        RecyclerView.Adapter<LaunchersAdapter.ViewHolder>() {
-    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
-        holder.bindView(launchers[position])
-    }
+class MyCursorAdapter(cxt: Context, dataCursor: Cursor, val itemClick: (AppLauncher) -> Unit) : RecyclerView.Adapter<MyCursorAdapter.ViewHolder>() {
+    val cursor = dataCursor
+    val context = cxt
 
     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, itemClick)
     }
 
+    override fun onBindViewHolder(holder: ViewHolder, position: Int) {
+        cursor.moveToPosition(position)
+        val name = cursor.getString(cursor.getColumnIndex(DbHelper.NAME))
+        val pkgName = cursor.getString(cursor.getColumnIndex(DbHelper.PKG_NAME))
+        val icon = context.resources.getDrawable(R.mipmap.launcher)
+        val launcher = AppLauncher(name, icon, pkgName)
+        holder.bindView(launcher)
+    }
+
     override fun getItemCount(): Int {
-        return launchers.count()
+        return cursor.count
     }
 
     class ViewHolder(view: View, val itemClick: (AppLauncher) -> Unit) : RecyclerView.ViewHolder(view) {

app/src/main/kotlin/com/simplemobiletools/applauncher/databases/DbHelper.kt

@@ -0,0 +1,54 @@
+package com.simplemobiletools.applauncher.databases
+
+import android.content.ContentValues
+import android.content.Context
+import android.database.Cursor
+import android.database.sqlite.SQLiteDatabase
+import android.database.sqlite.SQLiteOpenHelper
+
+class DbHelper(context: Context) : SQLiteOpenHelper(context, "launchers.db", null, 1) {
+    val TABLE = "launchers"
+    val CREATE_DB = "CREATE TABLE $TABLE (" +
+            "$ID integer PRIMARY KEY autoincrement," +
+            "$NAME TEXT," +
+            "$PKG_NAME TEXT UNIQUE" +
+            ")"
+
+    companion object {
+        val ID: String = "_id"
+        val NAME: String = "name"
+        val PKG_NAME: String = "pkgName"
+    }
+
+    fun addInitialLaunchers(db:SQLiteDatabase) {
+        addLauncher("Simple Calculator", "com.simplemobiletools.calculator", db)
+        addLauncher("Simple Calendar", "com.simplemobiletools.calendar", db)
+        addLauncher("Simple Camera", "com.simplemobiletools.camera", db)
+        addLauncher("Simple Draw", "com.simplemobiletools.draw", db)
+        addLauncher("Simple File Manager", "com.simplemobiletools.filemanager", db)
+        addLauncher("Simple Flashlight", "com.simplemobiletools.flashlight", db)
+        addLauncher("Simple Gallery", "com.simplemobiletools.gallery", db)
+        addLauncher("Simple Music Player", "com.simplemobiletools.musicplayer", db)
+        addLauncher("Simple Notes", "com.simplemobiletools.notes", db)
+    }
+
+    fun addLauncher(name: String, pkgName: String, db: SQLiteDatabase = writableDatabase) {
+        val contentValues = ContentValues()
+        contentValues.put(NAME, name)
+        contentValues.put(PKG_NAME, pkgName)
+        db.insert(TABLE, null, contentValues)
+    }
+
+    fun getLaunchers(): Cursor {
+        return readableDatabase.query(TABLE, arrayOf(NAME, PKG_NAME), null, null, null, null, NAME)
+    }
+
+    override fun onCreate(db: SQLiteDatabase) {
+        db.execSQL(CREATE_DB)
+        addInitialLaunchers(db)
+    }
+
+    override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
+
+    }
+}