[Android] The back button now toggles the visibility of the action ba…

…r in the emulation window. This can be used in the future to implement the overlay for save states and other things.

Source/Android/src/org/dolphinemu/dolphinemu/EmulationActivity.java

@@ -11,9 +11,11 @@
 import android.util.DisplayMetrics;
 import android.view.InputDevice;
 import android.view.KeyEvent;
+import android.view.Menu;
 import android.view.MotionEvent;
 import android.view.Window;
 import android.view.WindowManager;
+import android.view.WindowManager.LayoutParams;
 
 /**
  * This is the activity where all of the emulation handling happens.
@@ -22,6 +24,7 @@
 public final class EmulationActivity extends Activity
 {
 	private boolean Running;
+	private boolean IsActionBarHidden = false;
 	private float screenWidth;
 	private float screenHeight;
 
@@ -38,8 +41,8 @@ public void onCreate(Bundle savedInstanceState)
 		this.screenWidth = displayMetrics.widthPixels;
 
 		// Request window features for the emulation view.
-		getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
-		getWindow().requestFeature(Window.FEATURE_NO_TITLE);
+		getWindow().addFlags(LayoutParams.FLAG_KEEP_SCREEN_ON);
+		getWindow().addFlags(LayoutParams.FLAG_FULLSCREEN);
 		getWindow().requestFeature(Window.FEATURE_ACTION_BAR_OVERLAY);
 
 		// Set the native rendering screen width/height.
@@ -51,10 +54,13 @@ public void onCreate(Bundle savedInstanceState)
 		NativeLibrary.SetDimensions((int)screenWidth, (int)screenHeight);
 		NativeLibrary.SetFilename(gameToEmulate.getStringExtra("SelectedGame"));
 		Running = true;
-		
+
 		// Set the emulation window.
 		setContentView(R.layout.emulation_view);
-
+
+		// Hide the action bar by default so it doesn't get in the way.
+		getActionBar().hide();
+		IsActionBarHidden = true;
 	}
 
 	@Override
@@ -96,6 +102,29 @@ public boolean onTouchEvent(MotionEvent event)
 
 		return false;
 	}
+
+	@Override
+	public void onBackPressed()
+	{
+		// The back button in the emulation
+		// window is the toggle for the action bar.
+		if (IsActionBarHidden)
+		{
+			IsActionBarHidden = false;
+			getActionBar().show();
+		}
+		else
+		{
+			IsActionBarHidden = true;
+			getActionBar().hide();
+		}
+	}
+
+	@Override
+	public boolean onCreateOptionsMenu(Menu menu)
+	{
+		return true;
+	}
 
 	// Gets button presses
 	@Override
@@ -124,6 +153,14 @@ public boolean dispatchKeyEvent(KeyEvent event)
 			switch (event.getAction())
 			{
 				case KeyEvent.ACTION_DOWN:
+					// Handling the case where the back button is pressed.
+					if (event.getKeyCode() == KeyEvent.KEYCODE_BACK)
+					{
+						onBackPressed();
+						return true;
+					}
+
+					// Normal key events.
 					action = 0;
 					break;
 				case KeyEvent.ACTION_UP: