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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android&quot; xmlns:app="http://schemas.android.com/apk/res-auto&quot; xmlns:tools="http://schemas.android.com/tools&quot; android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:id="@+id/linear1" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#212121" android:gravity="center_horizontal|center_vertical" android:orientation="vertical"> <com.example.analogclockapp.AnalogClockView android:id="@+id/analogClock" android:layout_width="300dp" android:layout_height="300dp" android:orientation="vertical" android:layout_centerInParent="true" /> </LinearLayout> </LinearLayout>