Screen orientation in tablet

I am using the same code for both tablets and mobile, and I want to write an app for Xlarge screens with landscape. I wrote one condition but when I am rotating into portrait it generates an exception.

I have declared the condition:

final boolean isPortrait = getResources().getConfiguration().orientation ==Configuration.ORIENTATION_PORTRAIT;

I want code wit开发者_运维知识库h if else condition using xlarge and landscape orientations but it should work for only tablets but while coming to mobile it should not work.

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There are two methods to make an application full screen. The first simply states the application supports a specific dpi. The following code in the Manifest supports all dpis.

 <supports-screens android:smallScreens="true" 
              android:normalScreens="true" 
              android:largeScreens="true"
              android:xlargeScreens="true"
              android:anyDensity="true" />