focus_3.xml

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The file containing the source code shown below is located in the corresponding directory in <sdk>/samples/android-<version>/...

<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android开源工程

     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
     You may obtain a copy of the License at

          http://www.apache.org/licenses/LICENSE-2.0

     Unless required by applicable law or agreed to in writing, software
     distributed under the License is distributed on an "AS IS" BASIS,
     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     See the License for the specific language governing permissions and
     limitations under the License.
-->

<!-- Demonstrates using nextLeft, nextRight, nextUp and nextDown to get
     focus behavior that would be difficult with default focus calculation alg.-->

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="10dip">

    <Button android:id="@+id/top"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:nextFocusDown="@+id/bottom"
        android:text="@string/focus_3_top"/>

    <Button android:id="@+id/right"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:nextFocusLeft="@+id/left"
        android:text="@string/focus_3_right"/>

    <Button android:id="@+id/bottom"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:nextFocusUp="@+id/top"
        android:text="@string/focus_3_bottom"/>

    <Button android:id="@+id/left"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_centerVertical="true"
        android:nextFocusRight="@+id/right"
        android:text="@string/focus_3_left"/>

</RelativeLayout>