android AppWidgetProvider 定时刷新问题

AppWidgetProvider是专门用来制作android桌面组件的东东

本来想做一个小时钟

但是在定时刷新的时候遇到了问题

很多资料和书上的方法是

在onUpdate()方法中

用Intent请求Service

Intent intent = new Intent(context, UpdateService.class);
context.startService(intent);
在service中的onStart()或者onReceive()方法中来实现更新界面

而在AndroidManifest.xml中定义一个receiver

<receiver
android:label="@string/app_name"
android:name=".DeskMain">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
</intent-filter>
<meta-data android:name="android.appwidget.provider"
android:resource="@xml/my_widget_provider" >
</meta-data>
</receiver>
DeskMain是你的AppWidgetProvider类@xml/my_widget_provider是提供UI信息的配置文件 比如宽高

android.appwidget.action.APPWIDGET_UPDATE 书上的解释是 当AppWidget更新时会收到的系统广播信息

但是用eclipse填写xml的时候这个选项已经没有了于是上网查了一下

在 appwidget-provider 用 android:updatePeriodMillis这种方式已经在SKD1.5以后被废了

解决的办法找了一下 大概总结了几种

1.在onUpdate()中用自己的Timer和TimerTask解决

http://www.eoeandroid.com/thread-50955-1-1.html

2.用Thread

3.Intent intent=new Intent(context ,WidgetService.class);
PendingIntent refreshIntent=PendingIntent.getService(context, 0, intent, 0);
AlarmManager alarm=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC, 0, 1000, refreshIntent);//每秒1次
context.startService(intent);

---

service类↓

 publicclassWidgetServiceextendsService
 {

 @Override
 publicIBinderonBind(Intentintent)
 {
 returnnull;
 }

 @Override
 publicvoidonStart(Intentintent,intstartId)
 {
 super.onStart(intent,startId);
 RemoteViewsrv=newRemoteViews(this.getPackageName(),R.layout.app);
 rv.setTextViewText(R.id.av1,newDate().toLocaleString());
 ComponentNamecn=newComponentName(this,DeskMain.class);
 AppWidgetManageram=AppWidgetManager.getInstance(this);
 am.updateAppWidget(cn,rv);
 }
 }

AppWidgetProvider类↓

 publicclassDeskMainextendsAppWidgetProvider
 {

 @Override
 publicvoidonUpdate(Contextcontext,AppWidgetManagerappWidgetManager,
 int[]appWidgetIds)
 {
 Log.i("syso","update3...................");
 Intentintent=newIntent(context,WidgetService.class);
 PendingIntentrefreshIntent=PendingIntent.getService(context,0,intent,0);
 AlarmManageralarm=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
 alarm.setRepeating(AlarmManager.RTC,0,1000,refreshIntent);
 context.startService(intent);
 }

 @Override
 publicvoidonReceive(Contextcontext,Intentintent)
 {
 Log.i("syso","receive...................");
 super.onReceive(context,intent);
 }

AndroidManifest.xml

 <?xmlversion="1.0"encoding="utf-8"?>
 <manifestxmlns:android="http://schemas.android.com/apk/res/android"
 package="com.app"
 android:versionCode="1"
 android:versionName="1.0">
 <uses-permissionandroid:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>


 <applicationandroid:icon="@drawable/icon"android:label="@string/app_name"android:screenOrientation="portrait"android:permission="android.permission.ACCESS_FINE_LOCATION">
 <activityandroid:name=".Main"
 android:label="@string/app_name">
 <!---->
 <receiver
 android:label="@string/app_name"
 android:name=".DeskMain">
 <intent-filter>
 <actionandroid:name="android.appwidget.action.APPWIDGET_UPDATE"/>
 </intent-filter>
 <meta-dataandroid:name="android.appwidget.provider"
 android:resource="@xml/my_widget_provider">
 </meta-data>
 </receiver>
 <serviceandroid:name="WidgetService"/>

 </application>
 <uses-sdkandroid:minSdkVersion="7"/>

 </manifest>

layout下的app.xml UI布局 xml下的my_widget_provider.xml 提供了UI宽高信息

 <?xmlversion="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="horizontal"android:gravity="center">
 <ImageViewandroid:src="@drawable/icon"android:layout_height="wrap_content"android:layout_width="wrap_content"android:id="@+id/imageView1"></ImageView>

 <TextView
 android:gravity="center"android:text="TextView"android:id="@+id/av1"android:layout_width="wrap_content"android:layout_height="wrap_content"></TextView>
 </LinearLayout>

 <?xmlversion="1.0"encoding="utf-8"?>
 <appwidget-providerxmlns:android="http://schemas.android.com/apk/res/android"
 android:minWidth="95dip"
 android:minHeight="73dip"
 android:initialLayout="@layout/app"/>

转自：http://blog.csdn.net/maydie1989/article/details/6460163