1<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 2 android:id="@+id/main_layout" 3 android:layout_width="wrap_content" 4 android:layout_height="match_parent" 5 android:layout_gravity="center" 6 android:gravity="center" 7 android:orientation="vertical" 8 android:padding="10dp"> 9 10 <Button 11 android:id="@+id/request_device_aware_permissions" 12 android:layout_width="match_parent" 13 android:layout_height="wrap_content" 14 android:onClick="onRequestPermissions" 15 android:text="@string/request_device_aware_permissions" /> 16 17 <Button 18 android:id="@+id/revoke_device_aware_permissions" 19 android:layout_width="match_parent" 20 android:layout_height="wrap_content" 21 android:onClick="onRevokePermissions" 22 android:text="@string/revoke_device_aware_permissions" /> 23 24 <Button 25 android:id="@+id/request_non_device_aware_permissions" 26 android:layout_width="match_parent" 27 android:layout_height="wrap_content" 28 android:onClick="onRequestPermissions" 29 android:text="@string/request_non_device_aware_permissions" /> 30 31</LinearLayout>