I want to add a fling action on a LinearLayout. I have used the following code for this purpose.
public class NewsActivity extends Activity {
..........
...........
private static final int SWIPE_MIN_DISTANCE = 120;
private static final int SWIPE_MAX_OFF_PATH = 250;
private static final int SWIPE_THRESHOLD_VELOCITY = 200;
private GestureDetector gestureDetector;
View.OnTouchListener gestureListener;
@Override
public void onCreate(Bundle savedInstanceState) {
.....................
.....................
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LinearLayout newDeailsBlock = (LinearLayout) findViewById(R.id.newdeailsblock);
// Gesture detection
gestureDetector = new GestureDetector(new MyGestureDetector());
gestureListener = new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub
if (gestureDetector.onTouchEvent(event)) {
return true;
}
return false;
}
};
newDeailsBlock.setOnTouchListener(gestureListener);
}
class MyGestureDetector extends SimpleOnGestureListener {
@Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
try {
Log.d("move","Swipe test");
if (Math.abs(e1.getY() - e2.getY()) > SWIPE_MAX_OFF_PATH)
return false;
// right to left swipe
if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Log.d("move","Left Swipe");
} else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) {
Toast.makeText(NewsActivity.this, "Right Swipe", Toast.LENGTH_SHORT).show();
Log.d("move","Right Swipe");
}
} catch (Exception e) {
// nothing
}
return false;
}
}
}
But it is not working at all amd gestureDetector.onTouchEvent(event)
is returning false. What is the problem in my code?
Try having your Activity extend the below abstract class instead, and then implement the abstract methods
next()
andprevious()
with the functionality you want for the fling.