This demonstrates the basic code needed to write a Screen activity : Activity « UI « Android

1. Android
2. UI
3. Activity

This demonstrates the basic code needed to write a Screen activity

     
/*
 * 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 app.test;


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


/**
 * Simple example of writing an application Activity.
 * Hello World</a></h3>

<p>This demonstrates the basic code needed to write a Screen activity.</p>

<h4>Demo</h4>
App/Activity/Hello World
 
<h4>Source files</h4>
 * <table class="LinkTable">
 *         <tr>
 *             <td >src/com.example.android.apis/app/HelloWorld.java</td>
 *             <td >The Hello World Screen implementation</td>
 *         </tr>
 *         <tr>
 *             <td >/res/any/layout/hello_world.xml</td>
 *             <td >Defines contents of the screen</td>
 *         </tr>
 * </table> 
 */
public class Test extends Activity
{
    /**
     * Initialization of the Activity after it is first created.  Must at least
     * call {@link android.app.Activity#setContentView setContentView()} to
     * describe what is to be displayed in the screen.
     */
    @Override
  protected void onCreate(Bundle savedInstanceState)
    {
        // Be sure to call the super class.
        super.onCreate(savedInstanceState);

        // See assets/res/any/layout/hello_world.xml for this
        // view layout definition, which is being set here as
        // the content of our screen.
        setContentView(R.layout.main);
    }
}
//layout/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 basic application screen.
     See corresponding Java code com.android.sdk.app.HelloWorld.java. -->

<!-- This screen consists of a single text field that
     displays our "Hello, World!" text. -->
<TextView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/text"
    android:layout_width="match_parent" android:layout_height="match_parent"
    android:gravity="center_vertical|center_horizontal"
    android:textAppearance="?android:attr/textAppearanceMedium"
    android:text="hello_world"/>

   
    
    
    
    
  

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