Android之BroadcastReceiver 监听系统广播

绑定广播有两种方式

一.配置文件绑定，在程序未启动也能监听

二.代码方式绑定，在程序启动后才能监听

1.绑定和取消绑定广播

public class MainActivity extends Activity {
    private Button registerButton=null;
    private Button unRegisterButton=null;
    private SMSReceiver smsReceiver=null;
    private static final String SMS_ACTION="android.provider.Telephony.SMS_RECEIVED";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        registerButton=(Button)findViewById(R.id.registerButton);
        unRegisterButton=(Button)findViewById(R.id.unRegisterButton);
        
        registerButton.setOnClickListener(new RegisterReceiverListener());
        unRegisterButton.setOnClickListener(new UnRegisterReceiverListener());
        /*if (savedInstanceState == null) {
            getSupportFragmentManager().beginTransaction()
                    .add(R.id.container, new PlaceholderFragment()).commit();
        }*/
    }
    
    class RegisterReceiverListener implements OnClickListener
    {
        @Override
        public void onClick(View v) {
            System.out.println("registerReceiver");
            //生成一个BroadcastReceiver对象
            smsReceiver=new SMSReceiver();
            //生成一个IntentFilter对象
            IntentFilter filter=new IntentFilter();
            //为IntentFilter添加一个Action
            filter.addAction(SMS_ACTION);
            MainActivity.this.registerReceiver(smsReceiver, filter);
        }
    }
    class UnRegisterReceiverListener implements OnClickListener
    {
        @Override
        public void onClick(View v) {
            System.out.println("unregisterReceiver");
            MainActivity.this.unregisterReceiver(smsReceiver);
        }
    }

2.广播类

package com.example.mars_1800_broadcastreceiver02;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.gsm.SmsMessage;

public class SMSReceiver extends BroadcastReceiver{

    @Override
    public void onReceive(Context context, Intent intent) {
        System.out.println("receive message");
        
        //接收Intent对象当中的数据
        Bundle bundle=intent.getExtras();
        //在Bundle对象中有一个属性为pdus，该属性为Object数组
        Object[] myOBJpdus=(Object[])bundle.get("pdus");
        //创建一个SmsMessage类型的数组
        SmsMessage[] messages=new SmsMessage[myOBJpdus.length];
        System.out.println(messages.length);
        for (int i = 0; i < myOBJpdus.length; i++) {
            //使用Object数组中的对象创建SmsMessage对象
            messages[i]=SmsMessage.createFromPdu((byte[])myOBJpdus[i]);
            //获取到信息对象的内容
            System.out.println(messages[i].getDisplayOriginatingAddress());
            System.out.println(messages[i].getDisplayMessageBody());
        }
    }
}

3.加入相应权限

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.mars_1800_broadcastreceiver02"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="19" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.mars_1800_broadcastreceiver02.MainActivity"
            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="SMSReceiver" >
            <intent-filter>
                <action android:name="android.provider.Telephony.SMS_RECEIVED" />
            </intent-filter>
        </receiver> -->
    </application>
    <!--  接收短信广播则一定有加入相应的权限 -->
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>
</manifest>