以编程方式在 Android 中的 Activity 中禁用和启用方向更改
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Disable and enable orientation changes in an activity in Android programatically
提问by Ivan BASART
I have an App that make some background staff. When the background work is running a progress Circle is shown, if the device is rotated during this time then the Activity is "reset" and I want to avoid that.
我有一个应用程序可以让一些后台人员。当后台工作正在运行时，会显示进度圈，如果设备在此期间旋转，则 Activity 将“重置”，我想避免这种情况。
For this reason I decided disable orientation during this process. I have seen differends threads for this question but none with a valid solution, at least in my case.
出于这个原因，我决定在此过程中禁用方向。我已经看到了这个问题的不同线程，但没有一个有效的解决方案，至少在我的情况下。
The solutions posted are about fixing the activity orientation but you have to deal with the fact that the REVERSE orientations are not returned if you use:
发布的解决方案是关于修复活动方向，但您必须处理这样一个事实，即如果您使用，则不会返回 REVERSE 方向：
getResources().getConfiguration().orientation
The function above returns SCREEN_ORIENTATION_PORTRAIT both for PORTRAIT and REVERSE_PORTRAIT cases (at least in my tests).
上面的函数为 PORTRAIT 和 REVERSE_PORTRAIT 情况返回 SCREEN_ORIENTATION_PORTRAIT （至少在我的测试中）。
So at the end I used the Rotation value to deal with that, so my code "disable the rotation" is:
所以最后我使用了 Rotation 值来处理它，所以我的代码“禁用旋转”是：
int rotation = getWindowManager().getDefaultDisplay().getRotation();
switch(rotation) {
case Surface.ROTATION_180:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_PORTRAIT);
break;
case Surface.ROTATION_270:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_REVERSE_LANDSCAPE);
break;
case Surface.ROTATION_0:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
break;
case Surface.ROTATION_90:
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
break;
}
And to allow again the orientation:
并再次允许方向：
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
That works perfectly in a device with Android 4.1.2 but in a Device with Android 4.2.1 it is not working as expected.
这在带有 Android 4.1.2 的设备中完美运行，但在带有 Android 4.2.1 的设备中它没有按预期工作。
I guess managing rotation in the activity live cycle should be a common issue but I have not been able to find a suitable solution. May be I'm looking to the wrong direction so any help is really welcomed.
我想在活动实时周期中管理轮换应该是一个常见问题，但我一直无法找到合适的解决方案。可能是我看错了方向，所以任何帮助都非常受欢迎。
Thanks in advance, Ivan.
提前致谢，伊万。
回答by ashfak
If you want to disable orientation changes of the phone then you may use this code in the manifest
如果您想禁用手机的方向更改，则可以在清单中使用此代码
<activity android:name=".class_name"
//if you want your screen in portrait
//如果你想要你的屏幕纵向
android:screenOrientation="portrait" >
//if you want you screen in landscape mode
//如果你想在横向模式下屏幕
android:screenOrientation="landscape" >
and if you want your phone to change orientation but prevent the process from restarting then you can use the onConfigurationChanged method in your class:
如果您希望手机改变方向但阻止进程重新启动，那么您可以在类中使用 onConfigurationChanged 方法：
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation change
if (newConfig.orientation != Configuration.ORIENTATION_LANDSCAPE) {
super.onConfigurationChanged(newConfig);
}
}
回答by Hariharan
Try this..
尝试这个..
There is no wrong in your code. It's correct i checked it. Use that code in onConfigurationChangedthat may give the difference and another thing is use below code to disable the activity reset.
你的代码没有错。我查了一下是对的。使用该代码onConfigurationChanged可能会产生差异，另一件事是使用下面的代码来禁用活动重置。
<activity
android:name="YourActivity"
android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:windowSoftInputMode="adjustPan"/>
回答by benestar
You could override the on onConfiguratoinChangedmethod to disable orientation changes:
您可以覆盖onConfiguratoinChanged方法以禁用方向更改：
@Override
public void onConfigurationChanged(Configuration newConfig) {
// ignore orientation change
if (newConfig.orientation != Configuration.ORIENTATION_LANDSCAPE) {
super.onConfigurationChanged(newConfig);
}
}
Do not forget to enable the orientation changed listener in your AndroidManifest.xml file:
不要忘记在您的 AndroidManifest.xml 文件中启用方向更改侦听器：
<activity android:configChanges="orientation" >
回答by Deep Dave
Simple: one line to add after Activity Name in android manifest
简单：在 android manifest 中的 Activity Name 后面添加一行
android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale
This worked for me.
这对我有用。
