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.
