执行不同任务的方法是通过使用触摸监听器来持有文本视图。

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英文:

Performing different tasks by holding text view using touch listener

问题

代码:

textview_temp2.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {
        
        switch(motionEvent.getAction()) {
            case MotionEvent.ACTION_DOWN:
                Log.i("TAG1", "按下");
                // 在这里开始计时器
                return true;
            
            case MotionEvent.ACTION_UP:
                Log.i("TAG3", "抬起");
                // 在这里停止计时器
                return true;
        }
        
        return false;
    }
});

现在,如果用户长按文本视图超过5秒,我希望调用事件动作“抬起”。并且只有这两个事件中的一个应该被调用。

英文:

I have a text view, on which I am implementing the touch listener.

Code:

 textview_temp2.setOnTouchListener(new View.OnTouchListener() {
              @Override
              public boolean onTouch(View view, MotionEvent motionEvent) {
                  
                  switch(motionEvent.getAction())
                  {
                      case MotionEvent.ACTION_DOWN:

                          Log.i("TAG1","touched Down");
                          
                          return  true;
                     
                      case MotionEvent.ACTION_UP:

                          Log.i("TAG3","touched UP");
                          return  true;

                  }
                  return false;
              }
          });

Now, I want to call event action up if the user holds the text view for 5 or more seconds. Also, only one among these two events should be called.

答案1

得分: 1

触摸按下时保存系统时间,然后在触摸抬起时比较经过了多少时间。如果经过了3-5秒之间的时间,执行3秒的动作;如果经过的时间超过5秒,执行5秒的动作。如果你想在经过5秒时自动执行5秒的动作,即使用户一直按住触摸,你可以使用一个持续5秒的计时器,在初始触摸按下时启动计时器,在触摸抬起时停止计时器。如果计时器倒数到0而没有被触摸抬起停止,计时器应调用你想要执行的同一方法/动作,以进行5秒的操作。

英文:

Save the system time when touched down, then at touched up compare how much time elapsed. Anything between 3-5 seconds you execute the 3 second action, anything above the 5 second you execute the 5 seconds action. If you want to automatically do the 5 second action at 5 seconds even if the user keep the touch down, then you could use a timer with a 5 seconds duration, you start the timer on initial touch down and stop it on touched up. The timer should call the same method/action you want for the 5 seconds if it ticks down to 0 without being stopped by a touched up.

答案2

得分: 0

容易完成。您需要使用处理程序来处理延迟的任务。

final int STEP3SECS = 3;
final int STEP5SECS = 5;
Handler handler = new Handler(new Handler.Callback() {
    @Override
    public boolean handleMessage(Message msg) {
        if (msg.what == STEP3SECS) {
            // 进行3秒的任务
        } else if (msg.what == STEP5SECS) {
            // 进行5秒的任务
        }
        return false;
    }
});

然后:

textview_temp2.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {

        switch(motionEvent.getAction())
        {
            case MotionEvent.ACTION_DOWN:

                Log.i("TAG1","按下");
                handler.sendEmptyMessageDelayed(STEP3SECS,3000);
                handler.sendEmptyMessageDelayed(STEP5SECS,5000);
                return  true;

            case MotionEvent.ACTION_UP:

                Log.i("TAG3","抬起");
                handler.removeCallbacksAndMessages(null);
                return  true;

        }
        return false;
    }
});

ACTION_UP 可以在3个不同的时间间隔内发生:在3秒之前,没有任务被执行。在3秒之后和5秒之前,只有3秒的任务会被执行。在5秒之后,两个任务都会被处理。

英文:

Easy to accomplish. You need to use a handler to handle your delayed tasks.

final int STEP3SECS = 3;
final int STEP5SECS = 5;
Handler handler = new Handler(new Handler.Callback() {
    @Override
    public boolean handleMessage(Message msg) {
        if (msg.what == STEP3SECS) {
            //do 3 second job
        } else if (msg.what == STEP5SECS) {
            //do 5 second job
        }
        return false;
    }
});

And then:

textview_temp2.setOnTouchListener(new View.OnTouchListener() {
    @Override
    public boolean onTouch(View view, MotionEvent motionEvent) {

        switch(motionEvent.getAction())
        {
            case MotionEvent.ACTION_DOWN:

                Log.i("TAG1","touched Down");
                handler.sendEmptyMessageDelayed(STEP3SECS,3000);
                handler.sendEmptyMessageDelayed(STEP5SECS,5000);
                return  true;

            case MotionEvent.ACTION_UP:

                Log.i("TAG3","touched UP");
                handler.removeCallbacksAndMessages(null);
                return  true;

        }
        return false;
    }
});

ACTION_UP can take place in 3 different time intervals: before 3 seconds, well no job gets done. After 3 seconds and before 5 seconds, only 3 second job gets done. And after 5 seconds which both jobs are handled.

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  • 本文由 发表于 2020年9月9日 13:51:11
  • 转载请务必保留本文链接:https://go.coder-hub.com/63805463.html
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