Aligning With Center In Android With Hierarchical Layouts
Why doesn't the following code align with the center? What do I have to do to fix it?
Solution 1:
Well, android:layout_gravity is not about positioning of child views, it's about positioning of current view within its parent. Try using android:gravity for AbsoluteLayout (also you may want to switch to FrameLayout instead of Abdolute). For RelativeLayout, use android:layout_centerInParent="true" on the button.
<AbsoluteLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:gravity="center"
android:id="@+id/parent"
android:layout_height="match_parent"
android:layout_width="match_parent"
android:background="@color/blue">
<RelativeLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content">
<Button
android:layout_gravity="center"
android:id="@+id/Question01"
android:text="12 + 23"
android:gravity="center_vertical|center_horizontal"
android:layout_height="70px"
android:lines="1"
android:textSize="40px"
android:layout_alignWithParentIfMissing="true"
android:background="@drawable/orange_button"
android:layout_margin="5px" android:layout_width="230px"
android:textColor="@color/blue"
android:layout_centerInParent="true"/>
</RelativeLayout>
</AbsoluteLayout>
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