Prevent screen rotation on Android

I have one of my activities which I would like to prevent from rotating because I'm starting an AsyncTask, and screen rotation makes it restart.

Is there a way to tell this activity "DO NOT ROTATE the screen even if the user is shaking his phone like mad"?

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将android:screenOrientation="portrait"添加到清单或landscape的<activity>元素/ s，就完成了。

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You can follow the logic below to prevent auto rotate screen while your AsyncTask is running:

Store your current screen orientation inside your activity using getRequestedOrientation() .

Disable auto screen orientation using setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_NOSENSOR) .

Run/execute your AsyncTask .

At the end of your AsyncTask restore your previous orientation status using setRequestedOrientation(oldOrientation) .

Please note that there are several ways to access Activity (which runs on UI thread) properties inside an AsyncTask . You can implement your AsyncTask as an inner class or you can use message Handler that poke your Activiy class.

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In your Manifest file, for each Activity that you want to lock the screen rotation add: if you want to lock it in horizontal mode:

<activity
        ...
        ...
        android:screenOrientation="landscape">

or if you want to lock it in vertical mode:

<activity
            ...
            ...
            android:screenOrientation="portrait">

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