feat: Remember server selection

code/mobile/android/PhoneVR/app/src/main/AndroidManifest.xml

@@ -66,7 +66,8 @@
                 android:resource="@xml/provider_paths_app" />
         </provider>
         <activity
-            android:name=".MainActivity"/>
+            android:name=".MainActivity"
+            android:launchMode="singleTop" />
         <activity
             android:name=".GameActivity"
             android:configChanges="orientation|keyboardHidden|screenSize"
@@ -87,8 +88,8 @@
         <activity
             android:name=".ALVRActivity"
             android:screenOrientation="landscape"
-            android:theme="@style/Theme.AppCompat.NoActionBar">
-        </activity>
+            android:theme="@style/Theme.AppCompat.NoActionBar"
+            android:launchMode="singleTop" />
     </application>
 
 </manifest>

code/mobile/android/PhoneVR/app/src/main/java/viritualisres/phonevr/ALVRActivity.java

@@ -227,6 +227,16 @@ public boolean onMenuItemClick(MenuItem item) {
         if (item.getItemId() == R.id.switch_viewer) {
             switchViewerNative();
             return true;
+        } else if (item.getItemId() == R.id.switch_server) {
+            // remove alvr_server prefs
+            SharedPreferences.Editor editor = getSharedPreferences("prefs", MODE_PRIVATE).edit();
+            editor.remove("alvr_server");
+            editor.apply();
+
+            // start InitActivity and clear back history
+            Intent intent = new Intent(this, InitActivity.class);
+            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+            startActivity(intent);
         } else if (item.getItemId() == R.id.max_brightness_toggle) {
             // Save app setting boolean max_brightness == true
             item.setChecked(!item.isChecked());

code/mobile/android/PhoneVR/app/src/main/java/viritualisres/phonevr/InitActivity.kt

@@ -4,14 +4,14 @@ package viritualisres.phonevr
 import android.content.Intent
 import android.os.Build
 import android.os.Bundle
-import android.text.Html.FROM_HTML_MODE_LEGACY
 import android.text.method.LinkMovementMethod
 import android.text.util.Linkify
 import android.util.Log
 import android.view.View
 import android.widget.TextView
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.SwitchCompat
 import androidx.core.text.HtmlCompat
 
 class InitActivity : AppCompatActivity() {
@@ -34,9 +34,37 @@ class InitActivity : AppCompatActivity() {
         tvBody.text = String.format(resources.getString(R.string.phonevr_support_packages), result)
         tvBody.movementMethod = LinkMovementMethod.getInstance()
         Linkify.addLinks(tvBody, Linkify.WEB_URLS)
+
+        val prefs = getSharedPreferences("prefs", MODE_PRIVATE)
+        val swVRemember = findViewById<SwitchCompat>(R.id.remeber_server)
+        swVRemember.isChecked = prefs.getBoolean("remember", false)
+
+        // check if alvr_server setting exists == first run
+        // if user has chosen to show server selection menu from respective main activities,
+        // ALVRActivity or MainActivity
+        // Not kept in Resume() to prevent looping when coming back from AlvrActivity, or others
+        if (prefs.contains("alvr_server") && prefs.getBoolean("remember", false)) {
+            var intent = Intent(this, ALVRActivity::class.java)
+            if (!prefs.getBoolean("alvr_server", true)) {
+                intent = Intent(this, MainActivity::class.java)
+            }
+            startActivity(intent)
+        }
+
+        swVRemember.setOnCheckedChangeListener { _, isChecked ->
+            prefs.edit().putBoolean("remember", isChecked).apply()
+            if (!isChecked) {
+                prefs.edit().remove("alvr_server").apply()
+            }
+        }
     }
 
     fun btOnClickALVRStreamer(view: View) {
+        val prefs = getSharedPreferences("prefs", MODE_PRIVATE)
+        // Save choice after first open. alvr_server as boolean
+        if (prefs.getBoolean("remember", false))
+            prefs.edit().putBoolean("alvr_server", true).apply()
+
         val intent = Intent(this, ALVRActivity::class.java)
         startActivity(intent)
     }
@@ -47,6 +75,11 @@ class InitActivity : AppCompatActivity() {
         if (Build.SUPPORTED_ABIS.contains("x86") ||
             Build.SUPPORTED_ABIS.contains("arm64-v8a") ||
             Build.SUPPORTED_ABIS.contains("armeabi-v7a")) {
+            val prefs = getSharedPreferences("prefs", MODE_PRIVATE)
+
+            if (prefs.getBoolean("remember", false))
+                prefs.edit().putBoolean("alvr_server", false).apply()
+
             val intent = Intent(this, MainActivity::class.java)
             startActivity(intent)
         } else {

code/mobile/android/PhoneVR/app/src/main/java/viritualisres/phonevr/SettingsActivity.kt

@@ -105,6 +105,17 @@ class SettingsActivity : AppCompatActivity() {
                 OpenFileWithIntent(File(getExternalFilesDir(null).toString() + "/PVR/pvrlog.txt"))
             }
         }
+
+        val btSwitchServer: Button = findViewById(R.id.btSwitchServer)
+        btSwitchServer.setOnClickListener {
+            val prefs = getSharedPreferences("prefs", MODE_PRIVATE)
+            prefs.edit().remove("alvr_server").apply()
+
+            // Start initActivity and let user choose the server again. Clear back history
+            val intent = Intent(this@SettingsActivity, InitActivity::class.java)
+            intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
+            startActivity(intent)
+        }
     }
     /*
      * Zips a file at a location and places the resulting zip file at the toLocation

code/mobile/android/PhoneVR/app/src/main/res/layout/activity_init.xml

@@ -92,4 +92,18 @@
         app:layout_constraintTop_toTopOf="@+id/alvr_streamer"
         app:srcCompat="@mipmap/ic_launcher_alvr" />
 
+    <androidx.appcompat.widget.SwitchCompat
+        android:id="@+id/remeber_server"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="40dp"
+        android:text="@string/remember_choice"
+        android:textAlignment="viewStart"
+        android:textSize="14sp"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.498"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/pvr_streamer"
+        app:switchPadding="10dp" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

code/mobile/android/PhoneVR/app/src/main/res/layout/activity_settings.xml

@@ -288,6 +288,21 @@
         android:text="@string/share_logs"/>
     </LinearLayout>
 
+    <Button
+        android:id="@+id/btSwitchServer"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="60dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginStart="8dp"
+        android:layout_weight="1"
+        android:text="@string/switch_phonevr_server"
+        app:layout_constraintBottom_toTopOf="@id/textViewLog"
+        app:layout_constraintTop_toBottomOf="@+id/btLayout"
+        tools:layout_editor_absoluteX="10dp" />
+
     <TextView
         android:id="@+id/textViewLog"
         android:layout_width="0dp"
@@ -297,7 +312,7 @@
         android:text="@string/log_recent_100_lines"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/btLayout"
+        app:layout_constraintTop_toBottomOf="@+id/btSwitchServer"
         android:layout_marginStart="8dp"
         android:layout_marginEnd="8dp"
         android:layout_marginTop="8dp" />

code/mobile/android/PhoneVR/app/src/main/res/menu/settings_menu.xml

@@ -4,6 +4,8 @@
     android:layout_height="match_parent">
     <item android:id="@+id/switch_viewer"
         android:title="@string/switch_viewer" />
+    <item android:id="@+id/switch_server"
+        android:title="@string/switch_phonevr_server" />
     <item
         android:id="@+id/max_brightness_toggle"
         android:title="@string/max_brightness"

code/mobile/android/PhoneVR/app/src/main/res/values/strings.xml

@@ -38,5 +38,7 @@
     <string name="switch_viewer">
             Switch Cardboard viewer
     </string>
+    <string name="switch_phonevr_server">Switch PhoneVR Server</string>
+    <string name="remember_choice">Remember choice</string>
     <string name="max_brightness">Max Brightness</string>
 </resources>