android 电话状态的监听(来电和去电） PhoneStateListener和TelephonyManager

今天的程序可以实现电话状态改变时启动（来电、接听、挂断、拨打电话），但是暂时没法实现拨打电话时判断对方是否接听、转语音信箱等。Android在电话状态改变是会发送action为android.intent.action.PHONE_STATE的广播，而拨打电话时会发送action为android.intent.action.NEW_OUTGOING_CALL的广播，但是我看了下开发文档,暂时没发现有来电时的广播。知道这个就好办了，我们写个BroadcastReceiver用于接收这两个广播就可以了。

1. package com.pocketdigi.phonelistener;

1.  

1. import android.app.Service;

1. import android.content.BroadcastReceiver;

1. import android.content.Context;

1. import android.content.Intent;

1. import android.telephony.PhoneStateListener;

1. import android.telephony.TelephonyManager;

1.  

1. publicclassPhoneReceiverextendsBroadcastReceiver{

1.  

1. @Override

1. publicvoid onReceive(Context context,Intent intent){

1. // TODO Auto-generated method stub

1. System.out.println("action"+intent.getAction());

1. if(intent.getAction().equals(Intent.ACTION_NEW_OUTGOING_CALL)){

1. //如果是去电（拨出）

1. System.out.println("拨出");

1. }else{

1. //查了下android文档，貌似没有专门用于接收来电的action,所以，非去电即来电

1. System.out.println("来电");

1. TelephonyManager tm =(TelephonyManager)context.getSystemService(Service.TELEPHONY_SERVICE);

1. tm.listen(listener,PhoneStateListener.LISTEN_CALL_STATE);

1. //设置一个监听器

1. }

1. }

1. PhoneStateListener listener=newPhoneStateListener(){

1.  

1. @Override

1. publicvoid onCallStateChanged(int state,String incomingNumber){

1. // TODO Auto-generated method stub

1. //state 当前状态 incomingNumber,貌似没有去电的API

1. super.onCallStateChanged(state, incomingNumber);

1. switch(state){

1. caseTelephonyManager.CALL_STATE_IDLE:

1. System.out.println("挂断");

1. break;

1. caseTelephonyManager.CALL_STATE_OFFHOOK:

1. System.out.println("接听");

1. break;

1. caseTelephonyManager.CALL_STATE_RINGING:

1. System.out.println("响铃:来电号码"+incomingNumber);

1. //输出来电号码

1. break;

1. }

1. }

1. };

1. }

要在AndroidManifest.xml注册广播接收器:

1. <receiverandroid:name=".PhoneReceiver">

1. <intent-filter>

1. <actionandroid:name="android.intent.action.PHONE_STATE"/>

1. <actionandroid:name="android.intent.action.NEW_OUTGOING_CALL"/>

1. </intent-filter>

1. </receiver>

还要添加权限:

1. <uses-permissionandroid:name="android.permission.READ_PHONE_STATE"></uses-permission>

1. <uses-permissionandroid:name="android.permission.PROCESS_OUTGOING_CALLS"></uses-permission>