onTouch方向

Question

我有一台GirdView和一台onTouchListener，我想知道当有人在屏幕上滑动手指时的方向，我可以轻松地左右移动，但我也想上下移动。

但我的问题是..

float currentX;
        float currentY;

        @Override
        public boolean onTouch(View v, MotionEvent event) {
                float x = event.getX();
                float y = event.getY();

                switch(event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    Log.d("Showpatch", "Down Triggered " + x + ", " + y);
                    currentX = x;
                    currentY = y;
                    break;

                case MotionEvent.ACTION_UP:
                    Log.d("Showpatch", "Up Triggered" + x + ", " + y);

                    Log.d("Showpatch", "Testing Left... " + x + ", " + y);
                    if (currentX > x) {
                        Log.d("Showpatch", "Moved Left");
                        return false;
                    }

                    Log.d("Showpatch", "Testing Right... " + x + ", " + y);
                    if (currentX < x) {
                        Log.d("Showpatch", "Moved Right");
                        return false;
                    }

                    Log.d("Showpatch", "Testing Down... " + x + ", " + y);
                    if (currentY < y) {
                        Log.d("Showpatch", "Moved Down");
                        return false;
                    }

                    Log.d("Showpatch", "Testing Up... " + x + ", " + y);
                    if (currentY < y) {
                        Log.d("Showpatch", "Moved Up");
                        return false;
                    }

                    break;
                }


            return false;
        }

正如我所说的，它可以毫无问题地向左和向右移动，但它永远不会检测到向上或向下，因为它在到达up/down语句之前会触发left/right，除非您准确地上下移动手指，否则它不会工作……

有没有一种方法可以让用户向上或向下滑动？

非常感谢您的帮助，谢谢。

Answer 1

我相信手势监听器可以帮助你做到这一点，它是在1.6中引入的

http://developer.android.com/resources/articles/gestures.html

干杯托比亚斯