I am trying to implement fling guestures in a game. However, it seems that the fling gestures are not detected (I am using Android emulator).
I'm not sure what is wrong as I have debugged it and the gestures are not being detected.
Here is my code, I apologize as it is kind of messy.
public class PlayActivity extends Activity {
private static final String TAG = "PlayActivity";
Maze maze;
GameView gameView;
ViewConfiguration vc;
int swipeMinDistance;
int swipeThresholdVelocity;
int swipeMaxOffPath;
private GestureDetector gestureDetector;
View.OnTouchListener gestureListener;
/**
* Sets up UI
*/
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
gameView = new GameView(this);
gameView.setKeepScreenOn(true);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(gameView);
this.maze = MazeContainer.getMaze();
ViewConfiguration vc = ViewConfiguration.get(getApplicationContext());
swipeMinDistance = vc.getScaledPagingTouchSlop();
swipeThresholdVelocity = vc.getScaledMinimumFlingVelocity();
swipeMaxOffPath = vc.getScaledTouchSlop();
gestureDetector = new GestureDetector(this, new MyGestureDetector());
gestureListener = new View.OnTouchListener() { //I don't know if I set this part up correctly
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
};
Toast.makeText(this, "Play Activity", Toast.LENGTH_LONG).show();
}
/**
* Makes sure that once back button is pressed, Title activity will start
*/
@Override
public void onBackPressed() {
Log.v(TAG, "Back button pressed. Going back to AMazeActivity.");
Intent intent = new Intent(getApplicationContext(), AMazeActivity.class);
startActivity(intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP));
finish();
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { //This method never gets executed
try {
if (Math.abs(e1.getY() - e2.getY()) > swipeMaxOffPath)
return false;
// right to left swipe
if(e1.getX() - e2.getX() > swipeMinDistance && Math.abs(velocityX) > swipeThresholdVelocity) {
// Toast.makeText(SelectFilterActivity.this, "Left Swipe", Toast.LENGTH_SHORT).show();
maze.keyDown(null, 'h');
} else if (e2.getX() - e1.getX() > swipeMinDistance && Math.abs(velocityX) > swipeThresholdVelocity) {
// Toast.makeText(SelectFilterActivity.this, "Right Swipe", Toast.LENGTH_SHORT).show();
maze.keyDown(null, 'j');
}
} catch (Exception e) {
// nothing
}
return false;
}
@Override
public boolean onDown(MotionEvent e) {
return true;
}
}
{
A suspicious area might be instantiating gesturesListener. But since the debugger is not telling me anything since nothing is going wrong, I don't know for sure. All I know is that dragging and accelerating the mouse over the emulator does not execute the appropriate methods inside MyGestureDetector.
Any tips is appreciated!
