Android--通话录音

我们在使用Android手机打电话时，有时可能会需要对来去电通话自动录音，本文就详细讲解实现Android来去电通话自动录音的方法。

来去电自动录音的关键在于如何监听手机电话状态的转变：

1）来电的状态的转换如下（红色标记是我们要用到的状态）

空闲（IDEL）——> 响铃（RINGING）——> 接听（ACTIVE）——> 挂断（经历DISCONNECTING——DISCONNECTED）——> 空闲（IDEL）

或者 空闲（IDEL）——> 响铃（RINGING）——> 拒接 ——> 空闲（IDEL）

2）去电状态的转换如下

空闲（IDEL）——> 拨号 （DIALING）——> （对方）响铃（ALERTING） ——> 建立连接（ACTIVE）—— 挂断（经历DISCONNECTING——DISCONNECTED）——> 空闲（IDEL）

或者 空闲（IDEL）——> 拨号 （DIALING）——> （对方）响铃（ALERTING）——> 挂断/对方拒接 ——> 空闲（IDEL）

下面就分别就来电和去电这两种状态分析并实现。

1、先进行来电的分析和实现。

相对去电来说，来电状态的转换检测要简单些。android api 中的PhoneStateListener 类提供了相应的方法，但我们需要覆盖其中的 onCallStateChanged(int state, String incomingNumber) 方法即可实现来电状态的检测，并在此基础上添加录音功能即可。其中 state 参数就是各种电话状态，到时我们将它跟下面我们要用到的状态进行比较，若是电话处在我们想要的状态上，则进行一系列操作，否则就不管他。想要获取这些状态，还需要另一个电话相关类，那就是
TelephonyManager， 该类 提供了一些电话状态，其中我们要用到的是：TelephonyManager.CALL_STATE_IDLE（空闲）、TelephonyManager.CALL_STATE_OFFHOOK（摘机）和 TelephonyManager.CALL_STATE_RINGING（来电响铃）这三个状态。判别这三种状态，可以继承 android.telephony.PhoneStateListener 类，实现上面提到的 onCallStateChanged(int state,
String incomingNumber) 方法，请看如下代码：

public class TelListener extends PhoneStateListener {

@Override
public void onCallStateChanged(int state, String incomingNumber) {
super.onCallStateChanged(state, incomingNumber);

switch (state) {
case TelephonyManager.CALL_STATE_IDLE: // 空闲状态，即无来电也无去电
Log.i("TelephoneState", "IDLE");
//此处添加一系列功能代码
break;
case TelephonyManager.CALL_STATE_RINGING: // 来电响铃
Log.i("TelephoneState", "RINGING");
//此处添加一系列功能代码
break;
case TelephonyManager.CALL_STATE_OFFHOOK: // 摘机，即接通
Log.i("TelephoneState", "OFFHOOK");
//此处添加一系列功能代码
break;
}

Log.i("TelephoneState", String.valueOf(incomingNumber));
}

}

有了以上来电状态监听代码还不足以实现监听功能，还需要在我们的一个Activity或者Service中实现监听，方法很简单，代码如下：

/**
* 在activity 或者 service中加入如下代码，以实现来电状态监听
*/
TelephonyManager telMgr = (TelephonyManager)context.getSystemService(
Context.TELEPHONY_SERVICE);
telMgr.listen(new TelListener(), PhoneStateListener.LISTEN_CALL_STATE);

这样就实现了来电状态监听功能，但要能够在设备中跑起来，这还不够，它还需要两个获取手机电话状态的权限：

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

这样的话就可以跑起来了。

说到这，我想如果你可以实现录音功能的话，在此基础上实现来电自动录音就应该没什么问题了，不过请容我简单罗嗦几句。既然是来电，那么要想录音的话，那么应该就是在监听到 TelephonyManager.CALL_STATE_OFFHOOK 的状态时开启录音机开始录音， 在监听到TelephonyManager.CALL_STATE_IDLE 的状态时关闭录音机停止录音。这样，来电录音功能就完成了，不要忘记录音功能同样需要权限：

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

<!-- 要存储文件或者创建文件夹的话还需要以下两个权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

2、介绍完了来电自动录音，下面就来介绍去电自动录音的实现方法。

上面说过，相比来电状态的监听，去电的要麻烦些，甚至这种方法不是通用的，这个主要是因为android api 中没有提供去电状态监听的相应类和方法（也许我刚接触，没有找到）。刚开始网上搜索了一通也没有找到对应的解决方法，大多是 来电监听的，也就是上面的方法。不过中途发现一篇博文（后来就搜不到了），记得是查询系统日志的方式，从中找到去电过程中的各个状态的关键词。无奈之中，最终妥协了此方法。

我的（联想A65上的）去电日志内容如下：

过滤关键词为 mforeground

01-06 16:29:54.225: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.245: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.631: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.645: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.742: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.766: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.873: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:54.877: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:55.108: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:55.125: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DIALING
01-06 16:29:57.030: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:57.155: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:57.480: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:57.598: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : ACTIVE
01-06 16:29:59.319: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : DISCONNECTING
01-06 16:29:59.373: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : DISCONNECTING
01-06 16:30:00.392: D/InCallScreen(251): - onDisconnect: currentlyIdle:true ; mForegroundCall.getState():DISCONNECTED
01-06 16:30:00.399: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): - onDisconnect: currentlyIdle:true ; mForegroundCall.getState():DISCONNECTED
01-06 16:30:01.042: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : IDLE
01-06 16:30:01.070: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : IDLE
01-06 16:30:01.558: D/InCallScreen(251): onPhoneStateChanged: mForegroundCall.getState() : IDLE
01-06 16:30:01.572: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mForegroundCall.getState() : IDLE

过滤关键词 mbackground

01-06 16:29:54.226: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.256: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.638: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.652: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.743: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.770: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.875: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:54.882: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:55.109: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:55.142: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.031: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.160: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.481: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:57.622: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:59.319: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:29:59.373: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.042: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.070: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.559: D/InCallScreen(251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE
01-06 16:30:01.573: V/LogInfo OutGoing Call(2492): D/InCallScreen(  251): onPhoneStateChanged: mBackgroundCall.getState() : IDLE

从上面的日志可以看到，每一行的末尾的大写英文词就是去电的状态，状态说明如下：

DIALING 拨号，对方还未响铃

ACTIVE 对方接通，通话建立

DISCONNECTING 通话断开时

DISCONNECTED 通话已断开，可以认为是挂机了

由于我拨打的是10010，没有响铃过程（电脑自动接通的够快），还少了一个状态，状态是ALERTING ，这个就是对方正在响铃的状态。

有了这几个去电状态就好办了，现在我们要做的就是读取系统日志，然后找到这些状态，提取的关键词就是上面提到的 mforeground（前台通话状态） 和 mbackground （后台通话状态）（可能不一样的设备生成的不一样，根据自己具体设备设置，这里只提取前台的），如果读取的这一行日志中 包含 mforground ，再看看是否包含上面的状态的单词。既然说的如此，那么看看读取系统日志的代码吧。

package com.sdvdxl.phonerecorder;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.sdvdxl.outgoingcall.OutgoingCallState;

import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
*
* @author sdvdxl
*  找到 日志中的
*  onPhoneStateChanged: mForegroundCall.getState() 这个是前台呼叫状态
*  mBackgroundCall.getState() 后台电话
*  若 是 DIALING 则是正在拨号，等待建立连接，但对方还没有响铃，
*  ALERTING 呼叫成功，即对方正在响铃，
*  若是 ACTIVE 则已经接通
*  若是 DISCONNECTED 则本号码呼叫已经挂断
*  若是 IDLE 则是处于 空闲状态
*
*/
public class ReadLog extends Thread {
private Context ctx;
private int logCount;

private static final String TAG = "LogInfo OutGoing Call";

/**
*  前后台电话
* @author sdvdxl
*
*/
private static class CallViewState {
public static final String FORE_GROUND_CALL_STATE = "mForeground";
}

/**
* 呼叫状态
* @author sdvdxl
*
*/
private static class CallState {
public static final String DIALING = "DIALING";
public static final String ALERTING = "ALERTING";
public static final String ACTIVE = "ACTIVE";
public static final String IDLE = "IDLE";
public static final String DISCONNECTED = "DISCONNECTED";
}

public ReadLog(Context ctx) {
this.ctx = ctx;
}

/**
* 读取Log流
* 取得呼出状态的log
* 从而得到转换状态
*/
@Override
public void run() {
Log.d(TAG, "开始读取日志记录");

String[] catchParams = {"logcat", "InCallScreen *:s"};
String[] clearParams = {"logcat", "-c"};

try {
Process process=Runtime.getRuntime().exec(catchParams);
InputStream is = process.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));

String line = null;
while ((line=reader.readLine())!=null) {
logCount++;
//输出所有
Log.v(TAG, line);

//日志超过512条就清理
if (logCount>512) {
//清理日志
Runtime.getRuntime().exec(clearParams)
.destroy();//销毁进程，释放资源
logCount = 0;
Log.v(TAG, "-----------清理日志---------------");
}

/*---------------------------------前台呼叫-----------------------*/
//空闲
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.IDLE)) {
Log.d(TAG, ReadLog.CallState.IDLE);
}

//正在拨号，等待建立连接，即已拨号，但对方还没有响铃，
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.DIALING)) {
Log.d(TAG, ReadLog.CallState.DIALING);
}

//呼叫对方 正在响铃
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.ALERTING)) {
Log.d(TAG, ReadLog.CallState.ALERTING);
}

//已接通，通话建立
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.ACTIVE)) {
Log.d(TAG, ReadLog.CallState.ACTIVE);
}

//断开连接，即挂机
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.DISCONNECTED)) {
Log.d(TAG, ReadLog.CallState.DISCONNECTED);
}

} //END while

} catch (IOException e) {
e.printStackTrace();
} //END try-catch
} //END run
} //END class ReadLog

以上代码中，之所以用线程，是为了防止读取日志过程中阻滞主方法的其他方法的执行，影响到程序捕捉对应的电话状态。

好了，捕捉到了去电过程中各个状态的转变，那么，如何通知给程序呢，我采用的方法是捕获后立马给系统发送广播，然后程序进行广播接收，接收后再处理录音事件。要发送广播，就要发送一个唯一的广播，为此，建立如下类：

package com.sdvdxl.outgoingcall;

import com.sdvdxl.phonerecorder.ReadLog;

import android.content.Context;
import android.util.Log;

public class OutgoingCallState {
Context ctx;
public OutgoingCallState(Context ctx) {
this.ctx = ctx;
}

/**
* 前台呼叫状态
* @author sdvdxl
*
*/
public static final class ForeGroundCallState {
public static final String DIALING =
"com.sdvdxl.phonerecorder.FORE_GROUND_DIALING";
public static final String ALERTING =
"com.sdvdxl.phonerecorder.FORE_GROUND_ALERTING";
public static final String ACTIVE =
"com.sdvdxl.phonerecorder.FORE_GROUND_ACTIVE";
public static final String IDLE =
"com.sdvdxl.phonerecorder.FORE_GROUND_IDLE";
public static final String DISCONNECTED =
"com.sdvdxl.phonerecorder.FORE_GROUND_DISCONNECTED";
}

/**
* 开始监听呼出状态的转变，
* 并在对应状态发送广播
*/
public void startListen() {
new ReadLog(ctx).start();
Log.d("Recorder", "开始监听呼出状态的转变，并在对应状态发送广播");
}

}

程序需要读取系统日志权限：

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

然后，在读取日志的类中检测到去电各个状态的地方发送一个广播，那么，读取日志的完整代码如下：

package com.sdvdxl.phonerecorder;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import com.sdvdxl.outgoingcall.OutgoingCallState;

import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
*
* @author mrloong
*  找到 日志中的
*  onPhoneStateChanged: mForegroundCall.getState() 这个是前台呼叫状态
*  mBackgroundCall.getState() 后台电话
*  若 是 DIALING 则是正在拨号，等待建立连接，但对方还没有响铃，
*  ALERTING 呼叫成功，即对方正在响铃，
*  若是 ACTIVE 则已经接通
*  若是 DISCONNECTED 则本号码呼叫已经挂断
*  若是 IDLE 则是处于 空闲状态
*
*/
public class ReadLog extends Thread {
private Context ctx;
private int logCount;

private static final String TAG = "LogInfo OutGoing Call";

/**
*  前后台电话
* @author sdvdxl
*
*/
private static class CallViewState {
public static final String FORE_GROUND_CALL_STATE = "mForeground";
}

/**
* 呼叫状态
* @author sdvdxl
*
*/
private static class CallState {
public static final String DIALING = "DIALING";
public static final String ALERTING = "ALERTING";
public static final String ACTIVE = "ACTIVE";
public static final String IDLE = "IDLE";
public static final String DISCONNECTED = "DISCONNECTED";
}

public ReadLog(Context ctx) {
this.ctx = ctx;
}

/**
* 读取Log流
* 取得呼出状态的log
* 从而得到转换状态
*/
@Override
public void run() {
Log.d(TAG, "开始读取日志记录");

String[] catchParams = {"logcat", "InCallScreen *:s"};
String[] clearParams = {"logcat", "-c"};

try {
Process process=Runtime.getRuntime().exec(catchParams);
InputStream is = process.getInputStream();
BufferedReader reader = new BufferedReader(new InputStreamReader(is));

String line = null;
while ((line=reader.readLine())!=null) {
logCount++;
//输出所有
Log.v(TAG, line);

//日志超过512条就清理
if (logCount>512) {
//清理日志
Runtime.getRuntime().exec(clearParams)
.destroy();//销毁进程，释放资源
logCount = 0;
Log.v(TAG, "-----------清理日志---------------");
}

/*---------------------------------前台呼叫-----------------------*/
//空闲
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.IDLE)) {
Log.d(TAG, ReadLog.CallState.IDLE);
}

//正在拨号，等待建立连接，即已拨号，但对方还没有响铃，
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.DIALING)) {
//发送广播
Intent dialingIntent = new Intent();
dialingIntent.setAction(OutgoingCallState.ForeGroundCallState.DIALING);
ctx.sendBroadcast(dialingIntent);

Log.d(TAG, ReadLog.CallState.DIALING);
}

//呼叫对方 正在响铃
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.ALERTING)) {
//发送广播
Intent dialingIntent = new Intent();
dialingIntent.setAction(OutgoingCallState.ForeGroundCallState.ALERTING);
ctx.sendBroadcast(dialingIntent);

Log.d(TAG, ReadLog.CallState.ALERTING);
}

//已接通，通话建立
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.ACTIVE)) {
//发送广播
Intent dialingIntent = new Intent();
dialingIntent.setAction(OutgoingCallState.ForeGroundCallState.ACTIVE);
ctx.sendBroadcast(dialingIntent);

Log.d(TAG, ReadLog.CallState.ACTIVE);
}

//断开连接，即挂机
if (line.contains(ReadLog.CallViewState.FORE_GROUND_CALL_STATE)
&& line.contains(ReadLog.CallState.DISCONNECTED)) {
//发送广播
Intent dialingIntent = new Intent();
dialingIntent.setAction(OutgoingCallState.ForeGroundCallState.DISCONNECTED);
ctx.sendBroadcast(dialingIntent);

Log.d(TAG, ReadLog.CallState.DISCONNECTED);
}

} //END while

} catch (IOException e) {
e.printStackTrace();
} //END try-catch
} //END run
} //END class ReadLog

发送了广播，那么就要有接收者，定义接收者如下（关于录音机的代码可以先忽略）：

package com.sdvdxl.phonerecorder;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

import com.sdvdxl.outgoingcall.OutgoingCallState;

public class OutgoingCallReciver extends BroadcastReceiver {
static final String TAG = "Recorder";
private MyRecorder recorder;

public OutgoingCallReciver() {
recorder = new MyRecorder();
}

public  OutgoingCallReciver (MyRecorder recorder) {
this.recorder = recorder;
}

@Override
public void onReceive(Context ctx, Intent intent) {
String phoneState = intent.getAction();

if (phoneState.equals(Intent.ACTION_NEW_OUTGOING_CALL)) {
String phoneNum = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);//拨出号码
recorder.setPhoneNumber(phoneNum);
recorder.setIsCommingNumber(false);
Log.d(TAG, "设置为去电状态");
Log.d(TAG, "去电状态 呼叫：" + phoneNum);
}

if (phoneState.equals(OutgoingCallState.ForeGroundCallState.DIALING)) {
Log.d(TAG, "正在拨号...");
}

if (phoneState.equals(OutgoingCallState.ForeGroundCallState.ALERTING)) {
Log.d(TAG, "正在呼叫...");
}

if (phoneState.equals(OutgoingCallState.ForeGroundCallState.ACTIVE)) {
if (!recorder.isCommingNumber() && !recorder.isStarted()) {
Log.d(TAG, "去电已接通 启动录音机");
recorder.start();

}
}

if (phoneState.equals(OutgoingCallState.ForeGroundCallState.DISCONNECTED)) {
if (!recorder.isCommingNumber() && recorder.isStarted()) {
Log.d(TAG, "已挂断 关闭录音机");
recorder.stop();
}
}
}

}

其中有这么一段代码：

String phoneState = intent.getAction();

if (phoneState.equals(Intent.ACTION_NEW_OUTGOING_CALL)) {
String phoneNum = intent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);//拨出号码
recorder.setPhoneNumber(phoneNum);
recorder.setIsCommingNumber(false);
Log.d(TAG, "设置为去电状态");
Log.d(TAG, "去电状态 呼叫：" + phoneNum);
}

这里是接收系统发出的广播，用于接收去电广播。这样，就获得了去电状态。

3、有了以上主要代码，可以说，来去电监听功能算是完成了，下面创建一个service来运行监听：

package com.sdvdxl.service;

import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.Log;
import android.widget.Toast;

import com.sdvdxl.outgoingcall.OutgoingCallState;
import com.sdvdxl.phonerecorder.MyRecorder;
import com.sdvdxl.phonerecorder.OutgoingCallReciver;
import com.sdvdxl.phonerecorder.TelListener;

public class PhoneCallStateService extends Service {
private OutgoingCallState outgoingCallState;
private OutgoingCallReciver outgoingCallReciver;
private MyRecorder recorder;

@Override
public void onCreate() {
super.onCreate();

//------以下应放在onStartCommand中，但2.3.5以下版本不会因service重新启动而重新调用--------
//监听电话状态，如果是打入且接听 或者 打出 则开始自动录音
//通话结束，保存文件到外部存储器上
Log.d("Recorder", "正在监听中...");
recorder = new MyRecorder();
outgoingCallState = new OutgoingCallState(this);
outgoingCallReciver = new OutgoingCallReciver(recorder);
outgoingCallState.startListen();
Toast.makeText(this, "服务已启动", Toast.LENGTH_LONG).show();

//去电
IntentFilter outgoingCallFilter = new IntentFilter();
outgoingCallFilter.addAction(OutgoingCallState.ForeGroundCallState.IDLE);
outgoingCallFilter.addAction(OutgoingCallState.ForeGroundCallState.DIALING);
outgoingCallFilter.addAction(OutgoingCallState.ForeGroundCallState.ALERTING);
outgoingCallFilter.addAction(OutgoingCallState.ForeGroundCallState.ACTIVE);
outgoingCallFilter.addAction(OutgoingCallState.ForeGroundCallState.DISCONNECTED);

outgoingCallFilter.addAction("android.intent.action.PHONE_STATE");
outgoingCallFilter.addAction("android.intent.action.NEW_OUTGOING_CALL");

//注册接收者
registerReceiver(outgoingCallReciver, outgoingCallFilter);

//来电
TelephonyManager telmgr = (TelephonyManager)getSystemService(
Context.TELEPHONY_SERVICE);
telmgr.listen(new TelListener(recorder), PhoneStateListener.LISTEN_CALL_STATE);

}

@Override
public IBinder onBind(Intent intent) {
// TODO Auto-generated method stub
return null;
}

@Override
public void onDestroy() {
super.onDestroy();
unregisterReceiver(outgoingCallReciver);
Toast.makeText(
this, "已关闭电话监听服务", Toast.LENGTH_LONG)
.show();
Log.d("Recorder", "已关闭电话监听服务");
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

return START_STICKY;
}

}

注册以下service：

<service android:name="com.sdvdxl.service.PhoneCallStateService" />

到此为止，来去电状态的监听功能算是完成了，剩下一个录音机，附上录音机代码如下：

package com.sdvdxl.phonerecorder;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.media.MediaRecorder;
import android.os.Environment;
import android.util.Log;

public class MyRecorder {
private String phoneNumber;
private MediaRecorder mrecorder;
private boolean started = false; //录音机是否已经启动
private boolean isCommingNumber = false;//是否是来电
private String TAG = "Recorder";

public MyRecorder(String phoneNumber) {
this.setPhoneNumber(phoneNumber);
}

public MyRecorder() {
}

public void start() {
started = true;
mrecorder = new MediaRecorder();

File recordPath = new File(
Environment.getExternalStorageDirectory()
, "/My record");
if (!recordPath.exists()) {
recordPath.mkdirs();
Log.d("recorder", "创建目录");
}

String callDir = "呼出";
if (isCommingNumber) {
callDir = "呼入";
}
String fileName = callDir + "-" + phoneNumber + "-"
+ new SimpleDateFormat("yy-MM-dd_HH-mm-ss")
.format(new Date(System.currentTimeMillis())) + ".mp3";//实际是3gp
File recordName = new File(recordPath, fileName);

try {
recordName.createNewFile();
Log.d("recorder", "创建文件" + recordName.getName());
} catch (IOException e) {
e.printStackTrace();
}

mrecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
mrecorder.setOutputFormat(MediaRecorder.OutputFormat.DEFAULT);
mrecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

mrecorder.setOutputFile(recordName.getAbsolutePath());

try {
mrecorder.prepare();
} catch (IllegalStateException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
mrecorder.start();
started = true;
Log.d(TAG , "录音开始");
}

public void stop() {
try {
if (mrecorder!=null) {
mrecorder.stop();
mrecorder.release();
mrecorder = null;
}
started = false;
} catch (IllegalStateException e) {
e.printStackTrace();
}

Log.d(TAG , "录音结束");
}

public void pause() {

}

public String getPhoneNumber() {
return phoneNumber;
}

public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}

public boolean isStarted() {
return started;
}

public void setStarted(boolean hasStarted) {
this.started = hasStarted;
}

public boolean isCommingNumber() {
return isCommingNumber;
}

public void setIsCommingNumber(boolean isCommingNumber) {
this.isCommingNumber = isCommingNumber;
}

}

到此，来去电通话自动录音的所有功能就完成了，大家可以自己试着编写并实现。

转载：http://www.jizhuomi.com/android/example/354.html