+

отлично!

centerVertical не работает

если указать вот так: android:layout_alignParentRight="true" android:layout_alignParentLeft="true" то выравнивает по левому краю, а если так: android:layout_alignParentLeft="true" android:layout_alignParentRight="true" то выравнивает по левому краю. Вопрос: Почему?

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:textAppearance="?android:textAppearanceLarge" android:text="Happy" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:textAppearance="?android:textAppearanceLarge" android:text="Birthday" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:textAppearanceLarge" android:layout_alignParentBottom="true" android:layout_alignParentRight="true" android:text="To You" /> </RelativeLayout>

centerVertical не работает

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:textAppearance="?android:textAppearanceLarge" android:text="Happy" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_centerHorizontal="true" android:textAppearance="?android:textAppearanceLarge" android:text="Birthday" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_alignParentRight="true" android:textAppearance="?android:textAppearanceLarge" android:text="To You" /> </RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <TextView android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:background="#FF7F50" android:layout_alignParentTop="true" android:textAppearance="?android:textAppearanceLarge" android:text="Happy" /> <TextView android:layout_width="0dp" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:background="#FFf200" android:textAppearance="?android:textAppearanceLarge" android:text="Birthday" /> <TextView android:layout_width="wrap_content" android:layout_weight="1" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:background="#FF7F50" android:textAppearance="?android:textAppearanceLarge" android:text="To You" /> </RelativeLayout>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_alignParentBottom="true" android:textAppearance="?android:textAppearanceLarge" android:text="Happy" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:textAppearance="?android:textAppearanceLarge" android:text="Birthday" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:textAppearanceLarge" android:text="To You" /> </RelativeLayout>

Задания нет. Вертикальное центрирование всё ещё не поддерживается в визуализаторе:

Line 11: The attribute `android:layout_centerVertical` is not supported here.