单个方法为多个按钮实现onTouchListener()

Question

我试图看看是否有一种方法可以创建一个单独的方法来实现多个按钮的触摸监听器,因为我有很多按钮几乎完全相同的事情.它们所做的唯一区别是它们将通过我的sendMessage()方法发送的消息,以及按钮需要多长时间才能发送消息.如果有办法,那可能是什么？而且,为什么不能这样的工作呢？

//Within onCreate Method...
Button mButton = (Button) findViewbyId(R.id.three_sec_button);
mButton = addTouchTimer(mButton, 3, 3);

电话 -

private Button addTouchTimer(Button button, final int sec, final int messageNum){
        button.setOnTouchListener(new View.OnTouchListener() {
            boolean longEnough = false;
            long realTimeLeft = sec * 1000;
            @Override
            // This will make it so that a message is only sent if the button is held down for 3 seconds
            // Otherwise it won't send. It is sent during the hold down process, releasing it returns a false
            // value and no message is sent.
            public boolean onTouch(View arg0, MotionEvent arg1) {
                Log.d("Button", "Touchy Touchy!");
                if(arg1.getAction() == MotionEvent.ACTION_DOWN){
                    buttonPressTime = new CountDownTimer(realTimeLeft, 1000){
                        @Override
                        public void onTick(long millisUntilDone){
                                realTimeLeft = millisUntilDone;
                        }

                        @Override
                        public void onFinish() {  
                            long timeLeft = realTimeLeft;
                            long currTime = System.currentTimeMillis();
                            long realFinishTime = currTime + timeLeft;
                                while(currTime < realFinishTime){
                                    currTime = System.currentTimeMillis();
                                }
                            longEnough = true;
                            sendEmergencyMessage(longEnough, messageNum);
                        }
                    }.start();
                }
                else if(arg1.getAction() == MotionEvent.ACTION_UP){
                    buttonPressTime.cancel();
                    sendMessage(longEnough, messageNum);
                }
                return longEnough;
            }           
        });

        return button;
    }

为了效率,似乎必须有一种更好的方法来实现它,而不是为每个按钮实现单独的监听器.注意,sendMessage()中有一个使用布尔值的Log调用,我希望看到它被传递时的设置.这是在释放按钮期间调用它的唯一原因.

Answer 1

是的你是对的,还有更好的方法.一个TouchListener,它处理所有内容,通过id确定它是哪个按钮.

void intialization(){
     Button m1, m2, m3, m4;
     ... //do initialization stuff
     m1.setId(1);
     m2.setId(2);
     m3.setId(3);
     m4.setId(4);
     MyTouchListener touchListener = new MyTouchListener();
     m1.setOnTouchListener(touchListener);
     m2.setOnTouchListener(touchListener);
     m3.setOnTouchListener(touchListener);
     m4.setOnTouchListener(touchListener);
 }

public class MyTouchListener implements OnTouchListener {
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch(v.getId()){
            case 1:
                //do stuff for button 1
                break;
            case 2:
                //do stuff for button 2
                break;
            case 3:
                //do stuff for button 3
                break;
            case 4:
                //do stuff for button 4
                break;
        }
        return true;
    }

}

这就是你如何做到的!在这种情况下,id的数值方法非常有用.另一种方法是让您的活动在您的活动中实现OnTouchListener,然后您的代码将更加简单.

public class MyActivity extends Activity implements OnTouchListener {

    void initialization(){
        Button m1, m2, m3, m4;
        ... //do initialization stuff
        m1.setId(1);
        m2.setId(2);
        m3.setId(3);
        m4.setId(4);
        m1.setOnTouchListener(this);
        m2.setOnTouchListener(this);
        m3.setOnTouchListener(this);
        m4.setOnTouchListener(this);
    }

    @Override
    public boolean onTouch(View v, MotionEvent event) {
        switch(v.getId()){
            case 1:
                //do stuff for button 1
                break;
            case 2:
                //do stuff for button 2
                break;
            case 3:
                //do stuff for button 3
                break;
            case 4:
                //do stuff for button 4
                break;
        }
        return true;
    }

}

注意:此方法也适用于OnClickListener,OnCheckedChangeListener或您将在Android视图上设置的任何其他侦听器.

Answer 2

有了ButterKnife就会是这样的.(在我的情况下,ImageView作为按钮)

@OnTouch({R.id.Button1, R.id.Button2, R.id.Button3})
public boolean buttonsTouched(ImageView button, MotionEvent event) {
    switch (event.getAction()) {
        case MotionEvent.ACTION_DOWN:
            --(Your ACTION on Pressed)--
            return true;
        case MotionEvent.ACTION_UP:
            --(Your ACTION on Release)--
            return true;
    }
    return true;
}