android – 为多个按钮实现onTouchListener()的单一方法

我试图看看有没有办法创建一个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.他们所做的唯一区别是他们将通过我的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.

解决方法

是的你是对的,还有更好的方法.一个TouchListener,用于处理所有内容,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,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.

android – 为多个按钮实现onTouchListener()的单一方法

解决方法

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