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January 9, 2022 15:52
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import android.content.Context; | |
import android.view.GestureDetector; | |
import android.view.GestureDetector.SimpleOnGestureListener; | |
import android.view.MotionEvent; | |
import android.view.View; | |
import android.view.View.OnTouchListener; | |
public class OnSwipeTouchListener implements OnTouchListener { | |
private final GestureDetector gestureDetector; | |
public OnSwipeTouchListener (Context ctx){ | |
gestureDetector = new GestureDetector(ctx, new GestureListener()); | |
} | |
@Override | |
public boolean onTouch(View v, MotionEvent event) { | |
return gestureDetector.onTouchEvent(event); | |
} | |
private final class GestureListener extends SimpleOnGestureListener { | |
private static final int SWIPE_THRESHOLD = 100; | |
private static final int SWIPE_VELOCITY_THRESHOLD = 100; | |
@Override | |
public boolean onDown(MotionEvent e) { | |
return true; | |
} | |
@Override | |
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { | |
boolean result = false; | |
try { | |
float diffY = e2.getY() - e1.getY(); | |
float diffX = e2.getX() - e1.getX(); | |
if (Math.abs(diffX) > Math.abs(diffY)) { | |
if (Math.abs(diffX) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) { | |
if (diffX > 0) { | |
onSwipeRight(); | |
} else { | |
onSwipeLeft(); | |
} | |
result = true; | |
} | |
} | |
else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) { | |
if (diffY > 0) { | |
onSwipeBottom(); | |
} else { | |
onSwipeTop(); | |
} | |
result = true; | |
} | |
} catch (Exception exception) { | |
exception.printStackTrace(); | |
} | |
return result; | |
} | |
} | |
public void onSwipeRight() { | |
} | |
public void onSwipeLeft() { | |
} | |
public void onSwipeTop() { | |
} | |
public void onSwipeBottom() { | |
} | |
} |
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imageView.setOnTouchListener(new OnSwipeTouchListener(MyActivity.this) { | |
public void onSwipeTop() { | |
Toast.makeText(MyActivity.this, "top", Toast.LENGTH_SHORT).show(); | |
} | |
public void onSwipeRight() { | |
Toast.makeText(MyActivity.this, "right", Toast.LENGTH_SHORT).show(); | |
} | |
public void onSwipeLeft() { | |
Toast.makeText(MyActivity.this, "left", Toast.LENGTH_SHORT).show(); | |
} | |
public void onSwipeBottom() { | |
Toast.makeText(MyActivity.this, "bottom", Toast.LENGTH_SHORT).show(); | |
} | |
}); |
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