android开发之Widget AppWidgetProvider

1、布局文件res/layout/widget_test.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".TestWidget" >

    <TextView
        android:id="@+id/display_text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="@string/hello_world" />

</RelativeLayout>

2、建立文件res/xml，放widget_provider.xml

<?xml version="1.0" encoding="utf-8"?> 
<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android" 
    android:minWidth="100dp"
    android:minHeight="10dp" 
    android:updatePeriodMillis="10000"
    android:initialLayout="@layout/widget_test"  
/>

3、AppWidgetProvider 类

package com.example.appwidgettest;

import java.text.SimpleDateFormat;
import java.util.Date;

import android.appwidget.AppWidgetManager; 
import android.appwidget.AppWidgetProvider; 
import android.content.ComponentName; 
import android.content.Context; 
import android.content.Intent; 
import android.os.Bundle;
import android.telephony.SmsMessage;
import android.widget.RemoteViews; 
 
public class TestWidget extends AppWidgetProvider {
 private static final String SMS_RECEIVED_ACTION = "android.provider.Telephony.SMS_RECEIVED";
 RemoteViews remoteviews; 
 
    @Override 
    public void onUpdate(Context context, AppWidgetManager appWidgetManager, 
            int[] appWidgetIds) { 
        super.onUpdate(context, appWidgetManager, appWidgetIds);
    } 
 
    @Override 
    public void onDeleted(Context context, int[] appWidgetIds) { 
        super.onDeleted(context, appWidgetIds);
    } 
 
    @Override 
    public void onDisabled(Context context) { 
        super.onDisabled(context);
    } 
 
    @Override 
    public void onEnabled(Context context) { 
        super.onEnabled(context); 
    } 
 
    @Override 
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals(SMS_RECEIVED_ACTION))
     { 
         Bundle bundle = intent.getExtras(); 
         Object[] pdus = (Object[]) bundle.get("pdus"); 
         for (Object pdu : pdus) { 
         SmsMessage message = SmsMessage.createFromPdu((byte[]) pdu); 
         String sender = message.getOriginatingAddress(); 
         String content = message.getMessageBody(); 
         Date date = new Date(message.getTimestampMillis()); 
         SimpleDateFormat farmat = new SimpleDateFormat(); 
         String time = farmat.format(date);
         
         if (remoteviews == null) { 
                remoteviews = new RemoteViews(context.getPackageName(), 
                        R.layout.activity_main); 
            } 
            remoteviews.setTextViewText(R.id.display_text, "New msg:" + sender +  "\n"  + time + "\n" + content); 
            AppWidgetManager appWidgetManger = AppWidgetManager 
                    .getInstance(context); 
            int[] appIds = appWidgetManger 
                    .getAppWidgetIds(new ComponentName(context, 
                      TestWidget.class)); 
            appWidgetManger.updateAppWidget(appIds, remoteviews); 
             
        }
        super.onReceive(context, intent);
    }
    }
}

4、AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.appwidgettest"    android:versionCode="1"    android:versionName="1.0" >

    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="17" />

    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >  <receiver android:name="TestWidget" android:label="@string/app_name">   <intent-filter>                 <action android:name="android.appwidget.action.APPWIDGET_UPDATE"></action>      </intent-filter>  <intent-filter>      <action android:name="android.provider.Telephony.SMS_RECEIVED"/>     </intent-filter>      <meta-data android:name="android.appwidget.provider" android:resource="@xml/widget_provider" />   </receiver>    </application>
<uses-permission android:name="android.permission.RECEIVE_SMS"/>
</manifest>