java 如何注册监听器以更改方向？
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How to register a listener for orientation change?
提问by Nguyen Minh Binh
My android app will run at background and I need to be notify immediately when orientation change. eg. When user rotate the phone from portrait to landscape (or landscape to portrait), the system should be tell my app that the orientation has changed.
我的 android 应用程序将在后台运行，当方向改变时我需要立即得到通知。例如。当用户将手机从纵向旋转到横向（或横向到纵向）时，系统应该告诉我的应用程序方向已经改变。
Thanks.
谢谢。
回答by Rafiq
This method is called when screen rotated
屏幕旋转时调用此方法
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
//Do stuff here
}
回答by Arif Nadeem
You do not have to explicitly set the Orientation listener.
您不必显式设置 Orientation 侦听器。
onConfigurationChangedwill be called by the system.
onConfigurationChanged会被系统调用。
@Override
public void onConfigurationChanged(Configuration myConfig) {
super.onConfigurationChanged(myConfig);
int orient = getResources().getConfiguration().orientation;
switch(orient) {
case Configuration.ORIENTATION_LANDSCAPE:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
case Configuration.ORIENTATION_PORTRAIT:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
default:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
}
}
