在Android桌面添加时间，并实时更新
1，主程序
View Code
1 public class ESTTime extends AppWidgetProvider {
2 //创建一个广播标识
3 private static final String UPDATE_ACTION="ESTTime_UPDATE";
4 public void onUpdate(Context context,AppWidgetManager appWidgetManager,int[] appWidgetIds) {
5 Intent intent =new Intent();
6 intent.setAction(UPDATE_ACTION);
7 PendingIntent pendingIntent=PendingIntent.getBroadcast(context, -1, intent, 0);
8 //实例一个时间对象
9 Time estTime = new Time("EST");
10 estTime.setToNow();
11 //实例一个管理appWidget的布局
12 RemoteViews updateViews = new RemoteViews(context.getPackageName(),R.layout.digitalclock);
13 //为appWidget添加一个时间
14 updateViews.setTextViewText(R.id.time,estTime.format("%H:%M"));
15 //创建一个监听
16 updateViews.setOnClickPendingIntent(R.id.time, pendingIntent);
17 //功过appWidgetManager对appWidget进行管理
18 appWidgetManager.updateAppWidget(appWidgetIds, updateViews);
19 }
20
21 @Override
22 public void onReceive(Context context, Intent intent) {
23 // TODO Auto-generated method stub
24 String gb=intent.getAction();
25 if(UPDATE_ACTION.equals(gb))
26 {
27 Time estTime = new Time("EST");
28 estTime.setToNow();
29 RemoteViews updateViews = new RemoteViews(context.getPackageName(),R.layout.digitalclock);
30 updateViews.setTextViewText(R.id.time,estTime.format("%H:%M"));
31 AppWidgetManager appWidgetManager =AppWidgetManager.getInstance(context);
32 ComponentName componentName=new ComponentName(context,ESTTime.class);
33 appWidgetManager.updateAppWidget(componentName, updateViews);
34 }
35 else
36 {
37 super.onReceive(context, intent);
38 }
39
40
41 }
42
43
44
45
46 }
2.布局文件
<?xml version="1.0" encoding="utf-8"?>
<Button
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/time"
android:textSize="45px"
android:textStyle="bold"
android:textColor="#FFFFFFFF"
android:background="@drawable/bg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
3.appwidget-provider的布局文件
View Code
<?xml version="1.0" encoding="utf-8"?>
<appwidget-provider
xmlns:android="http://schemas.android.com/apk/res/android"
android:minWidth="146dip"
android:minHeight="72dip"
android:updatePeriodMillis="1000"
android:initialLayout="@layout/digitalclock" />
