Android：应用程序窗口小部件提供程序中未收到“发送广播”

Question

我正在使用“刷新”按钮单击调用服务的小部件活动。工作后的这项服务发送一个应该由广播接收器接收的广播。但我无法找到任何原因，因为没有发生这种情况。

活动呼叫服务代码

Intent refreshIntent = new Intent(this, WidgetService.class);
refreshIntent.setAction(ACTION_WIDGET_REFRESH);
refreshIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
PendingIntent refreshPendingIntent = PendingIntent.getService(this, 0,
        refreshIntent, PendingIntent.FLAG_UPDATE_CURRENT);
views.setOnClickPendingIntent(R.id.button3, refreshPendingIntent);

服务发送广播

sendBroadcast(new Intent(ACTION_WIDGET_SERVICETOACTIVITY));

AndroidManifest.xml中的接收器代码

<receiver android:name=".GoogleMapsWidgetProvider" android:label="Google Map">
   <intent-filter>
            <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
            <action android:name="learn2develop.GoogleMaps.GoogleMapsWidgetProvider.ACTION_WIDGET_SERVICETOACTIVITY" />         
   </intent-filter>
        <meta-data android:name="android.appwidget.provider"
                   android:resource="@xml/app_widget_provider" />
</receiver>

Application Widget Provider，On receive Method

public void onReceive(Context paramContext, Intent paramIntent) {
    String str = paramIntent.getAction();
    if (paramIntent.getAction().equals(ACTION_WIDGET_REFRESH)) {
        // updateWidgetState(paramContext, str);
    } else if (paramIntent.getAction().equals(
            ACTION_WIDGET_SERVICETOACTIVITY)) {
        Toast.makeText(paramContext, "Service to Activity",
                Toast.LENGTH_SHORT).show();
    } else {
        super.onReceive(paramContext, paramIntent);
    }
}