Demonstrates using nextLeft, nextRight, nextUp and nextDown to get focus behavior that would be difficult with default focus : Focus « UI « Android

1. Android
2. UI
3. Focus

Demonstrates using nextLeft, nextRight, nextUp and nextDown to get focus behavior that would be difficult with default focus

   
     
     
/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * 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.
 */

package com.example.android.apis.view;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Button;

public class Focus3 extends Activity {
    private Button mTopButton;
    private Button mBottomButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        mTopButton = (Button) findViewById(R.id.top);
        mBottomButton = (Button) findViewById(R.id.bottom);
    }

    public Button getTopButton() {
        return mTopButton;
    }

    public Button getBottomButton() {
        return mBottomButton;
    }
}
//main.xml


<?xml version="1.0" encoding="utf-8"?>
<!-- Copyright (C) 2007 The Android Open Source Project

     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="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="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="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="focus_3_left"/>

</RelativeLayout>

   
    
    
  

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