问题描述
我听 onGlobalLayoutListener
如下code如图4所示。我要听它只有一次。
一旦 onGlobalLayout()
叫我想停下来倾听。
I listen to onGlobalLayoutListener
as shown in below code. I want to listen it only once.Once onGlobalLayout()
is called I want to stop listening to it.
我试着用 removeOnGlobalLayoutListener()
方法,但给出的警告需要调用API 16级(当前分钟为14)。
I tried using removeOnGlobalLayoutListener()
method but that gives warning that call required API level 16 (current min is 14).
我也试过用 removeGlobalOnLayoutListener
。但它去precated。
I also tried using removeGlobalOnLayoutListener
. But it is deprecated.
code:
searchWebView.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
// Do something
// Remove listener
}
});
如何删除 onGlobalLayoutListener
?
编辑:
推荐答案
您可以使用以下code删除 OnGlobalLayoutListener
。仍然会有一个删除线
在 removeGlobalOnLayoutListener()
,这一直是德precated。但是,皮棉警告将使用注解来照顾。
You can remove the OnGlobalLayoutListener
using the following code. There will still be a strikethrough
on removeGlobalOnLayoutListener()
, which has been deprecated. But, the lint warning will be taken care of by using the annotations.
@SuppressWarnings("deprecation")
@SuppressLint("NewApi")
searchWebView.getViewTreeObserver().addOnGlobalLayoutListener(
new OnGlobalLayoutListener() {
@Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT > Build.VERSION_CODES.ICE_CREAM_SANDWICH_MR1) {
searchWebView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
} else {
searchWebView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
}
}
});
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