Android桌面小部件开发，及注意事项

<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
    android:initialLayout="@layout/new_app_widget"
    android:minHeight="@dimen/dp_80"
    android:minWidth="@dimen/dp_400"
    android:previewImage="@drawable/ic_zuomian"
    android:updatePeriodMillis="864000"
    android:widgetCategory="home_screen|keyguard">
    <!--android:resizeMode="horizontal|vertical"-->
</appwidget-provider>

import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
public class MyAppWidget extends AppWidgetProvider {
    /**
     * 接收窗口小部件点击时发送的广播
     */
    @Override
    public void onReceive(Context context, Intent intent) {
        super.onReceive(context, intent);
    }
    /**
     * 每次窗口小部件被更新都调用一次该方法
     */
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {
        super.onUpdate(context, appWidgetManager, appWidgetIds);
        Log.i("AppWidget", "开始了更新");
 RemoteViews rv = new RemoteViews(AppUMS.mContent.getPackageName(), R.layout.my_app_widget);
//这里获得当前的包名，并且用AppWidgetManager来向NewAppWidget.class发送广播。
        AppWidgetManager manager = AppWidgetManager.getInstance(AppUMS.mContent);
        ComponentName cn = new ComponentName(AppUMS.mContent, NewAppWidget.class);
        manager.updateAppWidget(cn, rv);
    }
    /**
     * 每删除一次窗口小部件就调用一次
     */
    @Override
    public void onDeleted(Context context, int[] appWidgetIds) {
        super.onDeleted(context, appWidgetIds);
        //context.stopService(new Intent(context, WidgetService.class));
        Log.i("AppWidget", "删除成功！");
    }
    /**
     * 当该窗口小部件第一次添加到桌面时调用该方法
     */
    @Override
    public void onEnabled(Context context) {
        super.onEnabled(context);
       // Intent mTimerIntent = new Intent(context, WidgetService.class);
       // context.startService(mTimerIntent);
        Log.i("AppWidget", "创建成功！");
    }
    /**
     * 当最后一个该窗口小部件删除时调用该方法
     */
    @Override
    public void onDisabled(Context context) {
        super.onDisabled(context);
      //  Intent mTimerIntent = new Intent(context, WidgetService.class);
       // context.stopService(mTimerIntent);
        Log.i("AppWidget", "删除成功！");
    }
    /**
     * 当小部件大小改变时
     */
    @Override
    public void onAppWidgetOptionsChanged(Context context, AppWidgetManager appWidgetManager, int appWidgetId, Bundle newOptions) {
        super.onAppWidgetOptionsChanged(context, appWidgetManager, appWidgetId, newOptions);
    }
    /**
     * 当小部件从备份恢复时调用该方法
     */
    @Override
    public void onRestored(Context context, int[] oldWidgetIds, int[] newWidgetIds) {
        super.onRestored(context, oldWidgetIds, newWidgetIds);
    }
}

<!--广播接收参数-->
        <receiver android:name=".receiver.MyAppWidget">
            <intent-filter>
                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
                <action android:name="com.bwkj.qcxbm.widget.UPDATE_ALL" />
            </intent-filter>
            <meta-data
                android:name="android.appwidget.provider"
                android:resource="@xml/my_app_widget_info" />
        </receiver>

RemoteViews rv = new RemoteViews(AppUMS.mContent.getPackageName(), R.layout.my_app_widget);``
//这里获得当前的包名，并且用AppWidgetManager来向NewAppWidget.class发送广播。
        AppWidgetManager manager = AppWidgetManager.getInstance(AppUMS.mContent);
        ComponentName cn = new ComponentName(AppUMS.mContent, NewAppWidget.class);
        manager.updateAppWidget(cn, rv);