Android 实现电话来去自动录音的功能

时间：2020-11-21 15:17:01|栏目：Android代码|点击：次

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，大家按照文中的方法编写程序就可以完成此功能。

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：

XML/HTML代码

<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：

XML/HTML代码

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。

以上就是对Android 电话录音的开发，希望能帮助有需要的朋友，谢谢大家对本站的支持！

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