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@vic797
Last active May 28, 2018 18:45
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This is a simple class for basic gestures detection on Android. The original class that I found on internet includes only the swipe gestures.
import android.content.Context;
import android.util.Log;
import android.view.GestureDetector;
import android.view.MotionEvent;
import android.view.View;
@SuppressWarnings("unused")
public abstract class OnSwipeTouchListener implements View.OnTouchListener {
private final GestureDetector gestureDetector;
public OnSwipeTouchListener(Context context) {
gestureDetector = new GestureDetector(context, new GestureListener());
}
@Override
public boolean onTouch(View v, MotionEvent event) {
return gestureDetector.onTouchEvent(event);
}
abstract void onSwipeRight();
abstract void onSwipeLeft();
abstract void onSwipeTop();
abstract void onSwipeBottom();
abstract void onDoubleTouch();
abstract void onLongTouch();
abstract void onSingleTouch();
private class GestureListener extends GestureDetector.SimpleOnGestureListener{
private static final int SWIPE_THRESHOLD = 100;
private static final int SWIPE_VELOCITY_THRESHOLD = 100;
private static final String TAG = "OnSwipeTouchListener";
@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) > SWIPE_THRESHOLD && Math.abs(velocityX) > SWIPE_VELOCITY_THRESHOLD) {
if (diffX > 0) {
Log.i(TAG, "onSwipeRight");
onSwipeRight();
} else {
Log.i(TAG, "onSwipeLeft");
onSwipeLeft();
}
result = true;
} else if (Math.abs(diffY) > SWIPE_THRESHOLD && Math.abs(velocityY) > SWIPE_VELOCITY_THRESHOLD) {
if (diffY > 0) {
Log.i(TAG, "onSwipeBottom");
onSwipeBottom();
} else {
Log.i(TAG, "onSwipeTop");
onSwipeTop();
}
result = true;
}
} catch (Exception ex) {
ex.printStackTrace();
}
return result;
}
@Override
public boolean onDoubleTap(MotionEvent e) {
Log.i(TAG, "onDoubleTouch");
onDoubleTouch();
return true;
}
@Override
public void onLongPress(MotionEvent e) {
Log.i(TAG, "onLongTouch");
onLongTouch();
super.onLongPress(e);
}
@Override
public boolean onSingleTapConfirmed(MotionEvent e) {
Log.i(TAG, "onSingleTouch");
onSingleTouch();
return super.onSingleTapConfirmed(e);
}
}
}
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