Add activity-wise Multiwindow support

app/src/main/AndroidManifest.xml

@@ -18,9 +18,7 @@
         android:supportsRtl="true"
         android:theme="@style/AppTheme"
         tools:ignore="GoogleAppIndexingWarning"
-        android:resizeableActivity="true"
-        android:debuggable="true"
-        android:supportsPictureInPicture="true">
+        android:debuggable="true">
         <service
             android:name=".LorieService"
             android:enabled="true"
@@ -33,7 +31,9 @@
         <activity android:name=".MainActivity"
             android:theme="@style/NoActionBar"
             android:launchMode="singleInstance"
-            android:configChanges="fontScale|orientation|screenSize|keyboard|keyboardHidden|layoutDirection|locale|mcc|mnc|navigation|screenLayout|touchscreen|uiMode|smallestScreenSize|density">
+            android:supportsPictureInPicture="true"
+            android:configChanges="fontScale|orientation|screenSize|keyboard|keyboardHidden|layoutDirection|locale|mcc|mnc|navigation|screenLayout|touchscreen|uiMode|smallestScreenSize|density"
+            android:resizeableActivity="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
 
@@ -46,7 +46,9 @@
         <activity
             android:theme="@style/Theme.AppCompat.DayNight"
             android:excludeFromRecents="true"
-            android:name=".LoriePreferences" >
+            android:name=".LoriePreferences" 
+            android:supportsPictureInPicture="false"
+            android:resizeableActivity="true">
         </activity>
 	<meta-data android:name="com.samsung.android.multidisplay.keep_process_alive" android:value="true"/>
 	<meta-data android:name="android.allow_multiple_resumed_activities" android:value="true" />

app/src/main/java/com/termux/x11/AdditionalKeyboardView.java

@@ -70,6 +70,12 @@ public class AdditionalKeyboardView extends HorizontalScrollView implements View
 	    return;
 	}
 
+	if (isInPictureInPictureMode()) {
+	    if (getVisibility() != View.GONE)
+                setVisibility(View.GONE);
+            return;
+	}
+
         Rect r = new Rect();
         getWindowVisibleDisplayFrame(r);
 

app/src/main/java/com/termux/x11/MainActivity.java

@@ -113,4 +113,11 @@ public class MainActivity extends AppCompatActivity {
     @Override
     public void onBackPressed() {}
 
+    @Override
+    public void onUserLeaveHint () {
+        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
+	if (preferences.getBooolean("PIP", true)) {
+            enterPictureInPictureMode();
+	}
+    }
 }

app/src/main/res/xml/preferences.xml

@@ -1,18 +1,24 @@
 <?xml version="1.0" encoding="utf-8"?>
 <PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">
-    <CheckBoxPreference android:title="Show additional keyboard"
+    
+    <CheckBoxPreference 
+	android:title="Show additional keyboard"
         android:defaultValue="true"
         android:summary="Show keyboard with additional keys if soft keyboard is visible"
         android:key="showAdditionalKbd" />
-    <CheckBoxPreference android:title="Fullscreen mode"
+    
+    <CheckBoxPreference 
+	android:title="Fullscreen mode"
         android:defaultValue="false"
         android:key="fullscreen" />
+    
     <ListPreference
         android:title="Touchscreen input mode"
         android:key="touchMode"
         android:defaultValue="1"
         android:entries="@array/touchscreenInputModesEntries"
         android:entryValues="@array/touchscreenInputModesValues" />
+    
     <CheckBoxPreference
         android:title="Show IME with external keyboard"
         android:defaultValue="false"
@@ -24,4 +30,10 @@
         android:key="Reseed"
         android:summary="The screen size will be adjusted while Soft Keybourd is open. Additional Keybaord is not supported by this option." />
 
+    <CheckBoxPreference
+        android:title="PIP Mode"
+        android:defaultValue="true"
+        android:key="PIP"
+        android:summary="Show app in picture-in-picture mode when home button or recents button is pressed" />
+
 </PreferenceScreen>