How to use

onTouchEvent

method

in

com.davemorrissey.labs.subscaleview.SubsamplingScaleImageView

@Override
public boolean onTouchEvent(@NonNull MotionEvent event) {
  if (sPoints != null && !drawing) {
    return super.onTouchEvent(event);
  return consumed || super.onTouchEvent(event);

@Override
public boolean onTouchEvent(@NonNull MotionEvent event) {
  boolean result = super.onTouchEvent(event);
  if (isImageLoaded() && !isScaling()) {
    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN:
        if (mTransYAnim != null && mTransYAnim.isRunning()) {
          mTransYAnim.cancel();
        }
        mActionDownY = event.getY();
        mDragDistance = 0.0F;
        mIsDragDown = false;
        break;
      case MotionEvent.ACTION_MOVE:
        onActionMove(event);
        break;
      case MotionEvent.ACTION_UP:
      case MotionEvent.ACTION_CANCEL:
        onActionRelease();
        break;
      default:
        break;
    }
  }
  return result;
}

return consumed || super.onTouchEvent(motionEvent);