android - ACTION_UP は指が上にあるときに発火しません

Question

そのため、ここでこの問題に関するすべての議論を行いました。ACTION_UP が処理される場所は他にありません。

グラフィックスと計算を処理するためにスレッドを使用していますが、これが問題になる理由はわかりません。

これは onTouch メソッドの私の実装です:

@Override
public boolean onTouch(View v, MotionEvent event) {
    synchronized (this) {
        int action = event.getAction() & MotionEvent.ACTION_MASK;
        int pointerIndex = event.getAction()
                & MotionEvent.ACTION_POINTER_INDEX_MASK >> MotionEvent.ACTION_POINTER_INDEX_SHIFT;
        int pointerCount = event.getPointerCount();
        TouchEvent touchEvent;
        for (int i = 0; i < MAX_TOUCHPOINTS; i++) {
            if (i >= pointerCount) {
                isTouched[i] = false;
                id[i] = -1;
                continue;
            }
            int pointerId = event.getPointerId(i);
            if ((event.getAction() != MotionEvent.ACTION_MOVE && i != pointerIndex)) {
                // if its an up/down/cancel/out event mask the id to see if
                // we should process it for this touch point
                continue;
            }
            Log.i("Logged TouchEvents", "" + event.getAction());
            switch (action) {
            case MotionEvent.ACTION_DOWN:
            case MotionEvent.ACTION_POINTER_DOWN:
                touchEvent = touchEventPool.newObject();
                touchEvent.type = TouchEvent.TOUCH_DOWN;
                touchEvent.pointer = pointerId;
                touchEvent.x = touchX[i] = (int) (event.getX() * scaleX);
                touchEvent.y = touchY[i] = (int) (event.getY() * scaleY);
                isTouched[i] = true;
                id[i] = pointerId;
                toucheventBuffer.add(touchEvent);
                Log.d("MultiTouchHandler", "TouchEvent.Down ("
                        + touchEvent.x + "," + touchEvent.y + ")");

                break;

            case MotionEvent.ACTION_UP:
            case MotionEvent.ACTION_POINTER_UP:
            case MotionEvent.ACTION_CANCEL:
                touchEvent = touchEventPool.newObject();
                touchEvent.type = TouchEvent.TOUCH_UP;
                touchEvent.pointer = pointerId;
                touchEvent.x = touchX[i] = (int) (event.getX() * scaleX);
                touchEvent.y = touchY[i] = (int) (event.getY() * scaleY);
                isTouched[i] = false;
                id[i] = -1;
                toucheventBuffer.add(touchEvent);
                Log.d("MultiTouchHandler", "TouchEvent.TouchUp ("
                        + touchEvent.x + "," + touchEvent.y + ")");
                break;

            case MotionEvent.ACTION_MOVE:
                touchEvent = touchEventPool.newObject();
                touchEvent.type = TouchEvent.TOUCH_DRAG;
                touchEvent.pointer = pointerId;
                touchEvent.x = touchX[i] = (int) (event.getX() * scaleX);
                touchEvent.y = touchY[i] = (int) (event.getY() * scaleY);
                isTouched[i] = true;
                id[i] = pointerId;
                toucheventBuffer.add(touchEvent);
                Log.d("MultiTouchHandler", "TouchEvent.TouchDrag ("
                        + touchEvent.x + "," + touchEvent.y + ")");
                break;
            default:
                break;

            }

        }

    }
    return true;
}

変数 'action' (switch/case の前にチェックされる) が 1(ACTION_UP) になることはありません。

前もって感謝します。