If you have a tile image and want to repeat it as a background of your Android Activity screen this can be achieved using android:tileMode property, lets see an example,
Step 1: Select your texture image that you want to repeat,

Example: Texture Image to Repeat Step 2: Create an xml under res -> drawable having bitmap tag with android:tileMode="repeat" attribute,

Place the image in res folder <?xml version="1.0" encoding="utf-8"?> <bitmap xmlns:android="http://schemas.android.com/apk/res/android" android:src="@drawable/texture" android:tileMode="repeat" />Step 3: Now include this bitmap in the activity layout background attribute,
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/app_bg" > </RelativeLayout>
Result:

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