AppWidget简单实现

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1.首先写个类继承AppWidgetProvider，可以重写六个方法如下:

@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubSystem.out.println("onReceive");super.onReceive(context, intent);}@Overridepublic void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {// TODO Auto-generated method stubSystem.out.println("onUpdate");}@Overridepublic void onDeleted(Context context, int[] appWidgetIds) {// TODO Auto-generated method stubSystem.out.println("onDeleted");super.onDeleted(context, appWidgetIds);}@Overridepublic void onEnabled(Context context) {// TODO Auto-generated method stubSystem.out.println("onEnabled");super.onEnabled(context);}@Overridepublic void onDisabled(Context context) {// TODO Auto-generated method stubSystem.out.println("onDisabled");super.onDisabled(context);}

2、随便准备一布局文件，比如example_appwidget_info.xml文件

<?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"    android:orientation="vertical" >    <TextView        android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:text="@string/hello" />    <Button        android:id="@+id/button1"        android:layout_width="wrap_content"        android:onClick="button"        android:layout_height="wrap_content"        android:text="Button" /></LinearLayout>

3、在res文件夹下新建一文件夹xml，在xml文件夹下新建一XML文件，比如example_appwidget_info.xml

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"    android:minWidth="294dp"    android:minHeight="72dp"    android:updatePeriodMillis="86400000"    android:initialLayout="@layout/example_appwidget_info"></appwidget-provider>

4、在AndroidManifest注册一receiver,格式如下

        <receiver android:name="AppWidgetInfo">              <intent-filter><action android:name="android.appwidget.action.APPWIDGET_UPDATE" /></intent-filter>    <meta-data android:name="android.appwidget.provider"               android:resource="@xml/example_appwidget_info" />        </receiver>

5、运行一下软件，退出长按屏幕就能发现添加控件中有自己的控件了