On Android, getactionbar () always returns null. Or related issues

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1) Settings

< uses-sdk android:minSdkVersion= “4” android:targetSdkVersion= “11” />

This indicates that the application can be deployed on Android 3.0 or before. In other words, when the device’s sdkversion = = 11, the application will start the action bar

We need to set minsdkversion to 11 . Otherwise, your action will not appear

There are also some funny ones

getWindow().requestFeature(Window.FEATURE_ ACTION_ BAR);

You can get the actionbar out with this sentence, but the position of actionbar is black

Or in Android 8.0


They all have the same effect, so… Want to use mobile phones below sdk11

Don’t use actionbar, or there will be a lot of bugs

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