android - 查看只注册 MotionEvent.ACTION_DOWN

Question

我遇到了一个有趣的问题...我似乎无法找到解决方案。我正在使用 ObjectAnimator 来旋转 ImageView；但 onTouchListener 似乎只注册了 MotionEvent.ACTION_DOWN。 (我从 Log Cats 中推导出来，还有 MotionEvent.ACTION_MOVE 和 MotionEvent.ACTION_UP)。

我认为问题可能与尝试同时聆听和动画化一个 View 有关。我将 ImageView 和线性布局(设置为 MATCH PARENT)包装在一个相对布局中，并注册了线性布局以监听触摸事件。线性布局也有同样的问题；仅处理 MotionEvent.ACTION_UP。我需要做些什么才能注册 MotionEvent.ACTION_MOVE 吗？

这是我的代码:

            touch_pad = (LinearLayout) findViewById(R.id.layout_touch_capture);
    touch_pad.setOnTouchListener(this);
    touch_pad.requestFocus();

            public boolean onTouch(View v, MotionEvent event) {
    switch(v.getId()) {
    case (R.id.layout_touch_capture):

    long end = 0;
    long start = 0;
    float y = event.getY();
    float y_sum = y;
    float x = event.getX();

    switch(event.getAction()) {
    case (MotionEvent.ACTION_UP): 
        end = animator.getCurrentPlayTime();
    Log.d("WheelActivity", "end location = " + end);
    break;
    case (MotionEvent.ACTION_MOVE):

    Log.d("WheelActivity", "event.getY() = " + y);
    y_sum += y;
    animator.setCurrentPlayTime((long) (start + y_sum));
    Log.d("WheelActivity", "animator play time = "                               animator.getCurrentPlayTime());
    Log.d("WheelActivity", "animator fraction = " +
          animator.getAnimatedFraction());

    break;
    case (MotionEvent.ACTION_DOWN): 
        start = animator.getCurrentPlayTime();
    Log.d("WheelActivity", "start location = " + start);
    break;
    }   
    }
    return false;
}

(抱歉，格式不正确的代码...)

Answer 1

return false;  

改为return true;