android学习——App Widget

有时候 eclipse 和  虚拟机 两次跑一个程序 出不一样的结果 。 崩溃。。。。

建个 xml/hello_appwidget_info.xml

<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"    android:minWidth="294dp"    android:minHeight="272dp"    android:updatePeriodMillis="86400000"    android:initialLayout="@layout/hello_appwidget"    >    <!-- android:configure="demo.appwidget.AppWidgetConfig"  --></appwidget-provider>

布局  hello_appwidget

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView  android:id="@+id/widgetText"    android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="textfirst"    /><Buttonandroid:id="@+id/widgetButton"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="点击普通监听" /> <Buttonandroid:id="@+id/widgetButton2"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="通过广播监听 " />  <Buttonandroid:id="@+id/widgetButton3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="测试 " /></LinearLayout>

maifest

<application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".HelloAppWidget" 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="HelloAppWidgetProvider"><intent-filter><action android:name="android.appwidget.action.APPWIDGET_UPDATE" /></intent-filter><intent-filter><action android:name="demo.appwidget.APPWIDGET_UPDATE" /></intent-filter><meta-data android:name="android.appwidget.provider"android:resource="@xml/hello_appwidget_info" /></receiver><activity android:name=".AppWidgetConfig">    <intent-filter>        <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE" />    </intent-filter></activity></application>

java

public class HelloAppWidgetProvider extends AppWidgetProvider {private static final String ACTION_UPATE="demo.appwidget.APPWIDGET_UPDATE";@Overridepublic void onDeleted(Context context, int[] appWidgetIds) {// TODO Auto-generated method stubSystem.out.println("onDeleted");super.onDeleted(context, appWidgetIds);}@Overridepublic void onDisabled(Context context) {// TODO Auto-generated method stubSystem.out.println("onDisabled");super.onDisabled(context);}//只有在第一次添加一个widget才调用此方法@Overridepublic void onEnabled(Context context) {// TODO Auto-generated method stubSystem.out.println("onEnabled");super.onEnabled(context);}//每次都调用update@Overridepublic void onReceive(Context context, Intent intent) {// TODO Auto-generated method stubSystem.out.println("onReceive");String action = intent.getAction();if (ACTION_UPATE.equals(action)) {System.out.println(action);RemoteViews remoteViews = new RemoteViews(context.getPackageName(),R.layout.hello_appwidget);remoteViews.setTextViewText(R.id.widgetText, "接受广播之后的值");AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);ComponentName componentName = new ComponentName(context,HelloAppWidgetProvider.class);// 更新appWidgetManager.updateAppWidget(componentName, remoteViews);} else {super.onReceive(context, intent);}}//接着调用update@Overridepublic void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {// TODO Auto-generated method stubSystem.out.println("onUpdate");//给所有的appWidgets 添加监听事件for (int i = 0; i < appWidgetIds.length; i++) {System.out.println("update"+appWidgetIds[i]);Intent intent=new Intent(context,AppWidgetConfig.class);PendingIntent pendingIntent=PendingIntent.getActivity(context, 0, intent, 0);//得到appwidget控件RemoteViews remoteView= new RemoteViews(context.getPackageName(), R.layout.hello_appwidget);//在appWidget中的控件remoteView.setOnClickPendingIntent(R.id.widgetButton, pendingIntent);//更新指定id控件appWidgetManager.updateAppWidget(appWidgetIds[i], remoteView);}//使用广播Intent intent=new Intent();intent.setAction(ACTION_UPATE);PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, 0);RemoteViews remoteViews=new RemoteViews(context.getPackageName(), R.layout.hello_appwidget);remoteViews.setOnClickPendingIntent(R.id.widgetButton2, pendingIntent);appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);super.onUpdate(context, appWidgetManager, appWidgetIds);}}

我在同一个provider 中即使用了 getActivity() 和  getBroadcast()    测试的时候发现 有时候行 有时候不行  ， 有知道怎么回事的不  ？ 请教？