如何检查屏幕是否被触摸超过2秒

时间:2014-04-23 11:40:32

标签: android ontouchevent ontouchlistener

在不停止主UI线程的情况下检查屏幕是否已被触摸2秒或更长时间哪个是最佳且更优化的策略?

我已经检查了一些示例代码,但我不确定哪种方法是实现它的最佳方法,而且我还需要在不停止主UI线程的情况下执行此操作。

由于

3 个答案:

答案 0 :(得分:2)

您可以像这样实施OnTouchListener

public abstract class TouchTimer implements View.OnTouchListener {

    private long touchStart = 0l;
    private long touchEnd = 0l;

    @Override
    public boolean onTouch(View view, MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                this.touchStart = System.currentTimeMillis();
                return true;

            case MotionEvent.ACTION_UP:
                this.touchEnd = System.currentTimeMillis();
                long touchTime = this.touchEnd - this.touchStart;
                onTouchEnded(touchTime);
                return true;

            case MotionEvent.ACTION_MOVE:
                return true;

            default:
                return false;
        }
    }

    protected abstract void onTouchEnded(long touchTimeInMillis);
}

您可以这样使用它:

view.setOnTouchListener(new TouchTimer() {
    @Override
    protected void onTouchEnded(long touchTimeInMillis) {
        // touchTimeInMillis contains the time the touch lasted in milliseconds
    }
});

触摸结束后调用方法onTouchEnded()

答案 1 :(得分:0)

Android代码的所有手势检测部分内部使用Handler类和postDelayed方法的组合。您可以使用它来发布要在任意时间(例如2秒)之后运行的代码片段。

  1. 覆盖dispatchTouchEvent
  2. 如果事件是新闻事件,请获取Handle,postDelayed runnable并保存
  3. 如果事件是发布/取消事件,请删除所有以前的runnables
  4. 等待2秒钟才能运行代码

    Runnable runnable;
    
    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
            runnable = new Runnable() {
                @Override
                public void run() {
                    //do something
                }
            };
            getHandler().postDelayed(runnable, 2000);
        } else if (ev.getAction() == MotionEvent.ACTION_UP 
                || ev.getAction() == MotionEvent.ACTION_CANCEL) {
            getHandler().removeCallbacks(runnable);
        }
        return super.dispatchTouchEvent(ev);
    }
    
  5. 见:http://developer.android.com/reference/android/os/Handler.html#postDelayed(java.lang.Runnable,长)

答案 2 :(得分:0)

我在OnTouchListener上使用RelativeLayout。我希望这会对你有所帮助。

RelativeLayout ll = (RelativeLayout) findViewById(R.id.ll);
ll.setOnTouchListener(new View.OnTouchListener() {

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_UP:

                long clickDuration = Calendar.getInstance().getTimeInMillis() - startClickTime;
                if (clickDuration >= MIN_CLICK_DURATION) {
                    Toast.makeText(MainActivity.this, "TOUCHED FOR" + clickDuration + "MS", Toast.LENGTH_SHORT).show();
                }
                longClickActive = false;

                break;
            case MotionEvent.ACTION_DOWN:

                if (longClickActive == false) {
                    longClickActive = true;
                    Toast.makeText(MainActivity.this, "touch!", Toast.LENGTH_SHORT).show();
                    startClickTime = Calendar.getInstance().getTimeInMillis();
                }
                break;

            case MotionEvent.ACTION_MOVE:
                if (longClickActive == true) {

                    longClickActive = false;
                }
                break;
        }
        return true;
    }
});
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