Android 用于按下和释放按钮的侦听器
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原文地址: http://stackoverflow.com/questions/11779082/
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listener for pressing and releasing a button
提问by M'hamed
How can I listen for when a Buttonis pressed and released?
Button按下和释放a 时如何收听？
回答by sdabet
You can use a onTouchListener:
您可以使用onTouchListener：
view.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
// PRESSED
return true; // if you want to handle the touch event
case MotionEvent.ACTION_UP:
// RELEASED
return true; // if you want to handle the touch event
}
return false;
}
});
回答by Matt
The answer given by fiddleris correct for generic views.
fiddler给出的答案对于通用视图是正确的。
For a Button, you should return falsefrom the touch handler always:
对于 a Button，您应该始终false从触摸处理程序返回：
button.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
// PRESSED
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
// RELEASED
break;
}
return false;
}
});
If you return trueyou will circumvent the button's regular touch processing. Which means you will loose the visual effects of pressing the button down and the touch ripple. Also, Button#isPressed()will return falsewhile the button is actually pressed.
如果您返回，true您将绕过按钮的常规触摸处理。这意味着您将失去按下按钮和触摸波纹的视觉效果。此外，Button#isPressed()将false在实际按下按钮时返回。
The button's regular touch processing will ensure that you get the follow-up events even when returning false.
按钮的常规触摸处理将确保您即使在返回时也能获得后续事件false。
回答by prolink007
onTouchListeneris what you are looking for.
onTouchListener就是你要找的。
You will need to use the correct MotionEvent.
您将需要使用正确的MotionEvent.
This will allow you to handle the different types of "touches".
这将允许您处理不同类型的“触摸”。
