<?xml version="1.0" encoding="utf-8"?> 
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" 
  android:minWidth="100dp" 
  android:minHeight="72dp" 
  android:updatePeriodMillis="86400000" 
  android:initialLayout="@layout/myappwidget" 
  > 
</appwidget-provider>

上面分別是定義widget的寬度，高度，更新周期，以及l(fā)ayout的widget布局。

下面是我們的布局文件：

 <?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
  android:layout_width="match_parent" 
  android:layout_height="match_parent" 
  android:background="@drawable/widget_bg1" 
  android:gravity="center" 
  android:id="@+id/layout" 
  android:orientation="vertical" > 
 
  <TextView 
    android:id="@+id/txtMonth" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textColor="#000000" 
    android:layout_margin="2dp" 
    android:text="" /> 
<TextView 
    android:id="@+id/txtDay" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textColor="#990033" 
    android:textSize="25dp" 
    android:text="" /> 
<TextView 
    android:id="@+id/txtWeekDay" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_margin="2dp" 
    android:textColor="#000000" 
    android:text="" /> 
</LinearLayout>

對應(yīng)布局widget要求比較高，大家自行設(shè)計，更加美觀的界面。

接下來是我們的核心代碼ExampleAppWidgetProvider類了：

 import android.app.PendingIntent; 
import android.appwidget.AppWidgetManager; 
import android.appwidget.AppWidgetProvider; 
import android.content.Context; 
import android.content.Intent; 
import android.text.format.Time; 
import android.widget.RemoteViews; 
import android.widget.Toast; 
 
public class ExampleAppWidgetProvider extends AppWidgetProvider{ 
  private String[] months={"一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月"}; 
  private String[] days={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"}; 
  @Override 
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, 
      int[] appWidgetIds) { 
    // TODO Auto-generated method stub 
     
    RemoteViews remoteViews=new RemoteViews(context.getPackageName(), R.layout.myappwidget); 
    Time time=new Time(); 
    time.setToNow(); 
    String month=time.year+" "+months[time.month]; 
    remoteViews.setTextViewText(R.id.txtDay, new Integer(time.monthDay).toString()); 
    remoteViews.setTextViewText(R.id.txtMonth, month); 
    remoteViews.setTextViewText(R.id.txtWeekDay, days[time.weekDay]); 
    Intent intent=new Intent("cn.com.karl.widget.click"); 
    PendingIntent pendingIntent=PendingIntent.getBroadcast(context, 0, intent, 0); 
    remoteViews.setOnClickPendingIntent(R.id.layout, pendingIntent); 
    appWidgetManager.updateAppWidget(appWidgetIds, remoteViews); 
     
    super.onUpdate(context, appWidgetManager, appWidgetIds); 
  } 
   
  @Override 
  public void onReceive(Context context, Intent intent) { 
    // TODO Auto-generated method stub 
    super.onReceive(context, intent); 
    if(intent.getAction().equals("cn.com.karl.widget.click")){ 
      Toast.makeText(context, "點擊了widget日歷", 1).show(); 
    } 
  } 
}

上面代碼忘記做注釋了，在這類分別解釋下，使用remoteViews類分別加載上來布局文件的相應(yīng)ID設(shè)置好值，然PendingIntent 這就沒什么好解釋的了。

最后在manifest中加入：

 <receiver android:name="ExampleAppWidgetProvider" > 
      <intent-filter > 
        <action android:name="android.appwidget.action.APPWIDGET_UPDATE" /> 
        <action android:name="cn.com.karl.widget.click" > 
        </action> 
      </intent-filter> 
 
      <meta-data 
        android:name="android.appwidget.provider" 
        android:resource="@xml/myappwidetprovider" /> 
    </receiver>

這樣就完成了，運行項目看一下載手機上運行的效果吧：