Improve handling of focus behaviour on Android. Patch by Alexey Petruchik

android-project/src/org/libsdl/app/SDLActivity.java

@@ -190,7 +190,7 @@ public class SDLActivity extends Activity {
         if (SDLActivity.mIsPaused && SDLActivity.mIsSurfaceReady && SDLActivity.mHasFocus) {
             SDLActivity.mIsPaused = false;
             SDLActivity.nativeResume();
-            mSurface.enableSensor(Sensor.TYPE_ACCELEROMETER, true);
+            mSurface.handleResume();
         }
     }
         
@@ -550,6 +550,15 @@ class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
         mWidth = 1.0f;
         mHeight = 1.0f;
     }
+     
+    public void handleResume() {
+        setFocusable(true);
+        setFocusableInTouchMode(true);
+        requestFocus();
+        setOnKeyListener(this);
+        setOnTouchListener(this);
+        enableSensor(Sensor.TYPE_ACCELEROMETER, true);
+    }
     
     public Surface getNativeSurface() {
         return getHolder().getSurface();