AppWidget簡單實現

1.首先寫個類繼承AppWidgetProvider，可以重寫六個方法如下:

@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、隨便準備一布局檔案，比如example_appwidget_info.xml檔案

<?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檔案夾下建立一檔案夾xml，在xml檔案夾下建立一XML檔案，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註冊一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、運行一下軟體，退出長按螢幕就能發現添加控制項中有自己的控制項了