HDImageView.java 文件源码

private void setFilingGesture(Context context) {
    mFlingDetector = new GestureDetector(context,new GestureDetector.SimpleOnGestureListener(){
        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {

            if (mTranslateEnabled && mReadySent && mViewTranslate != null && e1 != null && e2 != null
                    && (Math.abs(e1.getX() - e2.getX()) > 50 || Math.abs(e1.getY() - e2.getY()) > 50)
                    && (Math.abs(velocityX) > 500 || Math.abs(velocityY) > 500) && !mIsZooming) {
                PointF vTranslateEnd =
                        new PointF(mViewTranslate.x + (velocityX * 0.25f), mViewTranslate.y + (velocityY * 0.25f));
                float sCenterXEnd = ((getWidth() / 2.0F) - vTranslateEnd.x) / mScale;
                float sCenterYEnd = ((getHeight() / 2.0F) - vTranslateEnd.y) / mScale;
                startFilingAnimation(sCenterXEnd, sCenterYEnd);
                if (BuildConfig.DEBUG) Log.d(TAG, "onFling: 正在滑行");
                return true;
            }
            return false;
        }
    });
}