初始化AppWidget框架结构

先简单介绍一下桌面插件的形成方式：

xml文件中各个属性网上有解释，可以查。

首先，在res文件中新建XML文件

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider
    xmlns:android="http://schemas.android.com/apk/res/android"    
    android:minWidth="100dp"
    android:minHeight="100dp"
    android:updatePeriodMillis = "10000"
    android:initialLayout = "@layout/appwidget"
        >
    
</appwidget-provider>

 

在原xml文件中布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
        <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="第一个app_widget应用" android:textSize="30dp"></TextView>
</LinearLayout>

 

Androidmanifest.xml设置代码

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  package="com.AppWidgetDemo" android:versionCode="1"
  android:versionName="1.0">
  <uses-sdk android:minSdkVersion="7" />

  <application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".MainActivity" android:label="@string/app_name">
      <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
    </activity>
    <receiver android:name="AppWidgetDemo">
      <intent-filter>
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
      </intent-filter>
      <meta-data android:name="android.appwidget.provider"
        android:resource="@xml/app_widget" />
    </receiver>
  </application>
</manifest>

代码如下

package com.AppWidgetDemo;

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;

public class AppWidgetDemo extends AppWidgetProvider {

  @Override
  public void onDeleted(Context context, int[] appWidgetIds) {
  System.out.println("onDeleted");
    super.onDeleted(context, appWidgetIds);
    
  }

  @Override
  public void onDisabled(Context context) {
    System.out.println("onDisabled");
    super.onDisabled(context);
  }

  @Override
  public void onEnabled(Context context) {
    System.out.println("onEnabled");
    super.onEnabled(context);
  }

  @Override
  public void onReceive(Context context, Intent intent) {
    System.out.println("onReceive");
    super.onReceive(context, intent);
  }

  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager,
      int[] appWidgetIds) {
    System.out.println("onUpdate");
    super.onUpdate(context, appWidgetManager, appWidgetIds);
    System.out.println("super下面的onUpdate");
  }

}

注意复写方法