Fix/fast appmenu (#20)

* Preload list of Apps when starting the App

In OnCreate, the variable `appsList` is used globally

* Improve ChooseActivity layout

Match it to the style of settings

* Reload appList continuously

Every 30 Seconds or when a app gets removed

* Create a `Install Apps` button

On click the PlayStore will be opened.

* Add missing translations

* Move global variables to `Functions.kt`

Anyone thinking global vars should not be used? I don't care haha... 
unless ... feel free to fork this repository and provide a better way of 
doing this ^^

app/src/main/java/com/finnmglas/launcher/ChooseActivity.kt

@@ -35,37 +35,23 @@ class ChooseActivity : AppCompatActivity() {
             heading.text = getString(R.string.choose_title_launch)
         else if (action == "pick") {
             heading.text = getString(R.string.choose_title)
-            subheading.text = forApp // TODO: make translatable
         }
         else if (action == "uninstall")
             heading.text = getString(R.string.choose_title_remove)
 
         /* Build Layout */
 
-        // TODO: Make this more efficient, faster, generate the list before
-
-        val mainIntent = Intent(Intent.ACTION_MAIN, null)
-        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER)
-
-        val pm = packageManager
-        val i = Intent(Intent.ACTION_MAIN)
-        i.addCategory(Intent.CATEGORY_LAUNCHER)
-        val apps = pm.queryIntentActivities(i, 0)
-
-        apps.sortBy { it.activityInfo.loadLabel(pm).toString() }
-
-        for (resolveInfo in apps) {
+        for (resolveInfo in appsList) {
             val app = resolveInfo.activityInfo
-            pm.getLaunchIntentForPackage(app.packageName)
 
             // creating TextView programmatically
             val tvdynamic = TextView(this)
             tvdynamic.textSize = 24f
-            tvdynamic.text = app.loadLabel(pm).toString()
+            tvdynamic.text = app.loadLabel(packageManager).toString()
             tvdynamic.setTextColor(Color.parseColor("#cccccc"))
 
             if (action == "launch"){
-                tvdynamic.setOnClickListener { startActivity(pm.getLaunchIntentForPackage(app.packageName)) }
+                tvdynamic.setOnClickListener { startActivity(packageManager.getLaunchIntentForPackage(app.packageName)) }
             }
             else if (action == "pick"){
                 tvdynamic.setOnClickListener {
@@ -96,6 +82,7 @@ class ChooseActivity : AppCompatActivity() {
         if (requestCode == UNINSTALL_REQUEST_CODE) {
             if (resultCode == Activity.RESULT_OK) {
                 Toast.makeText(this, getString(R.string.choose_removed_toast), Toast.LENGTH_LONG).show()
+                updateAppList(packageManager)
                 finish()
             } else if (resultCode == Activity.RESULT_FIRST_USER) {
                 Toast.makeText(this, getString(R.string.choose_not_removed_toast), Toast.LENGTH_LONG).show()

app/src/main/java/com/finnmglas/launcher/Functions.kt

@@ -7,6 +7,7 @@ import android.content.DialogInterface
 import android.content.Intent
 import android.content.SharedPreferences
 import android.content.pm.PackageManager
+import android.content.pm.ResolveInfo
 import android.net.Uri
 import android.os.Bundle
 import android.provider.Settings
@@ -16,6 +17,19 @@ import android.view.animation.Animation
 import android.view.animation.DecelerateInterpolator
 import android.widget.Toast
 
+/** Variables for all of the app */
+var upApp = ""
+var downApp = ""
+var rightApp = ""
+var leftApp = ""
+var volumeUpApp = ""
+var volumeDownApp = ""
+
+var calendarApp = ""
+var clockApp = ""
+
+var appsList : MutableList<ResolveInfo> = mutableListOf()
+
 // Taken from https://stackoverflow.com/questions/47293269
 fun View.blink(
     times: Int = Animation.INFINITE,
@@ -58,6 +72,13 @@ fun isInstalled(uri: String, context: Context): Boolean {
     return false
 }
 
+fun updateAppList(pm : PackageManager) {
+    val intent = Intent(Intent.ACTION_MAIN)
+        .addCategory(Intent.CATEGORY_LAUNCHER)
+    appsList = pm.queryIntentActivities(intent, 0)
+    appsList.sortBy { it.activityInfo.loadLabel(pm).toString() }
+}
+
 private fun getIntent(packageName: String, context: Context): Intent? {
     val intent: Intent? = context.packageManager.getLaunchIntentForPackage(packageName)
     intent?.addCategory(Intent.CATEGORY_LAUNCHER)

app/src/main/java/com/finnmglas/launcher/MainActivity.kt

@@ -2,6 +2,7 @@ package com.finnmglas.launcher
 
 import android.content.Context
 import android.content.Intent
+import android.os.AsyncTask
 import android.os.Bundle
 import android.util.DisplayMetrics
 import android.view.*
@@ -13,17 +14,6 @@ import java.util.*
 import kotlin.concurrent.fixedRateTimer
 import kotlin.math.abs
 
-/** Variables for all of the app */
-var upApp = ""
-var downApp = ""
-var rightApp = ""
-var leftApp = ""
-var volumeUpApp = ""
-var volumeDownApp = ""
-
-var calendarApp = ""
-var clockApp = ""
-
 class MainActivity : AppCompatActivity(),
     GestureDetector.OnGestureListener, GestureDetector.OnDoubleTapListener {
 
@@ -36,6 +26,7 @@ class MainActivity : AppCompatActivity(),
     // timers
     private var clockTimer = Timer()
     private var tooltipTimer = Timer()
+    private var loadAppsTimer = Timer()
 
     private var settingsIconShown = false
 
@@ -99,11 +90,17 @@ class MainActivity : AppCompatActivity(),
             }
         }
 
+        val pm = packageManager
+
+        loadAppsTimer = fixedRateTimer("loadAppsTimer", true, 0L, 30000) {
+            AsyncTask.execute { updateAppList(pm) }
+        }
     }
 
     override fun onPause() {
         super.onPause()
         clockTimer.cancel()
+        loadAppsTimer.cancel()
     }
 
 

app/src/main/java/com/finnmglas/launcher/SettingsActivity.kt

@@ -8,6 +8,7 @@ import android.os.Bundle
 import android.provider.Settings
 import android.view.View
 import android.view.WindowManager
+import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.viewpager.widget.ViewPager
 import com.finnmglas.launcher.ui.main.SectionsPagerAdapter
@@ -81,6 +82,18 @@ class SettingsActivity : AppCompatActivity() {
         startActivity(intent)
     }
 
+    fun chooseInstallApp(view : View) {
+        try {
+            val rateIntent = Intent(
+                Intent.ACTION_VIEW,
+                Uri.parse("https://play.google.com/store/apps/"))
+            startActivity(rateIntent)
+        } catch (e: ActivityNotFoundException) {
+            Toast.makeText(this,getString(R.string.settings_toast_store_not_found), Toast.LENGTH_SHORT)
+                .show()
+        }
+    }
+
     fun openFinnWebsite(view: View) { openNewTabWindow(getString(R.string.settings_footer_web), this) }
     fun openGithubRepo(view: View) { openNewTabWindow(getString(R.string.settings_footer_repo), this) }