举例说明如何在android中利用Service来实现后台发送邮件功能

程序如下：

import android.app.Activity;

import android.content.Intent;

import android.content.res.Resources.NotFoundException;

import android.os.Bundle;

import android.widget.TextView;

public class A05Activity extends Activity {

private TextView tv;

private String[] receiver;

private String subject;

private String body;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

tv=(TextView)findViewById(R.id.tv);

tv.setText("等待接收邮件中···");

try {

//取得短信传来的Bundle

Bundle b=this.getIntent().getExtras();

if(b!=null){

//将Bundle中的字符串取出

String s=b.getString("input");

receiver=new String[]{"1650967185@163.com"};

subject="邮箱发送";

body=s.toString();

//自定义一个Intent业执行发送E-mail的工作

Intent i=new Intent(android.content.Intent.ACTION_SEND);

i.setType("plain/text");//设置邮件格式为“plain/text”

i.putExtra(android.content.Intent.EXTRA_EMAIL,receiver);//传入收件人地址

i.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);//传入邮件主题

i.putExtra(android.content.Intent.EXTRA_TEXT, body);//传入邮件内容

startActivity(Intent.createChooser(i, getResources().getString(R.string.message)));

}

else{

finish();

}

} catch (NotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.telephony.gsm.SmsMessage;//用来收取短信

import android.widget.Toast;//告知用户收到短信

@SuppressWarnings("deprecation")

public class ServiceA05 extends BroadcastReceiver{

public static final String mAction="android.provider.Telephony.SMS_RECEIVED";

private String str_receiver="收到短信";

@Override

public void onReceive(Context arg0, Intent arg1) {

// TODO Auto-generated method stub

Toast.makeText(arg0, str_receiver.toString(), Toast.LENGTH_LONG).show();

if(arg1.getAction().equals(mAction)){

//建构一字符串集合变量sb

StringBuilder sb=new StringBuilder();

//接收数据

Bundle b=arg1.getExtras();

//判断intent传送数据是否为空

if(b!=null){

//pdus为android内置的短信参数indentifier

/*

* 通过bundle.get("")返回一个包含pdus的对象*/

Object[] myOBJpuds=(Object[])b.get("pdus");

//构造短信对象数组，并根据短信内容大小来确定数组的大小

SmsMessage[] sm=new SmsMessage[myOBJpuds.length];

for(int i=0;i<myOBJpuds.length;i++){

sm[i]=SmsMessage.createFromPdu((byte[])myOBJpuds[i]);

}

//将短信合并自定义信息于StringBuilder当中

for(SmsMessage sm01:sm){

sb.append("接收到来自：\n");

//收信人的电话号码

sb.append(sm01.getDisplayOriginatingAddress());

sb.append("\n--------传来的短信---------\n");

//取得传来短信的内容

sb.append(sm01.getDisplayMessageBody());

//用Toast来显示来电信息

Toast.makeText(arg0, sb.toString(), Toast.LENGTH_LONG).show();

}

}

Toast.makeText(arg0, sb.toString(), Toast.LENGTH_LONG).show();

//返回主Activity

Intent i=new Intent(arg0,A05Activity.class);

//定义一个Bundle

Bundle b01=new Bundle();

//将短信以putString()方法存入Bundle中

b01.putString("input", sb.toString());

//将Bundle放入Intent中

i.putExtras(b01);

//设置Intent的Flag以一个全新的task来运行

i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

arg0.startActivity(i);

}

}

}

AndroidManifest.xml如下：

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.my.a05"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk android:minSdkVersion="10" />

<application

android:icon="@drawable/ic_launcher"

android:label="@string/app_name" >

<activity

android:name=".A05Activity"

android:label="@string/app_name" >

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<receiver android:name="ServiceA05">

<intent-filter>

<action android:name="android.provider.Telephony.SMS_RECEIVED"/>

</intent-filter>

</receiver>

</application>

<uses-permission android:name="android.permission.RECEIVE_SMS"/>

</manifest>

在android中注册一个BroadcastReceiver,并设置这个receiver的intent-filter(Android.provider.Telephony.SMS_RECEIVED)，让它针对短信事件做出反应。并且还要添加一个权限：android.permission.RECEIVE_SMS。