android服务（service）初步——通话录音

启动服务之后，监听手机TelephonyManager状态,根据不同情况做出选择，源码以及截图如下：



生成的录音文件：



Log日志：



这个不知道为什么，点击多次停止服务的时候，总是会出现下面的BUG：

图片看不清楚，我把日志复制了出来如下：

09-21 19:56:31.850: ERROR/audio_input(34): unsupported parameter: x-pvmf/media-input-node/cap-config-interface;valtype=key_specific_value

09-21 19:56:31.850: ERROR/audio_input(34): VerifyAndSetParameter failed

知道原因的，麻烦告诉我，灰常感激。。。俺百度了好久不知道为啥。



源码：

MainActivity:

[java] view
plaincopy

package com.song;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.widget.Button;

public class PhoneListenerActivity extends Activity

{

protected static final String ACTION = "recordingFlag";

protected static final String TAG = "TAG";

Button btnStart;

Button btnStop;

@Override

public void onCreate(Bundle savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

btnStart = (Button) findViewById(R.id.btnstart);

btnStop = (Button) findViewById(R.id.btnstop);

btnStart.setOnClickListener(new Button.OnClickListener()

{

@Override

public void onClick(View v)

{

Log.v(TAG, "startService");

startService(new Intent(ACTION));

}

});

btnStop.setOnClickListener(new Button.OnClickListener()

{

@Override

public void onClick(View v)

{

Log.v(TAG, "stopService");

stopService(new Intent(ACTION));

}

});

}

}

服务类：

[java] view
plaincopy

package com.song;

import java.io.IOException;

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;

import android.util.Log;

public class PhoneListenerService extends Service

{

private MediaRecorder recorder;

private boolean recording = false;

@Override

public IBinder onBind(Intent intent)

{

return null;

}

@Override

public void onCreate()

{

TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);

manager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);

super.onCreate();

}

private PhoneStateListener listener = new PhoneStateListener()

{

@Override

public void onCallStateChanged(int state, String incomingNumber)

{

super.onCallStateChanged(state, incomingNumber);

switch (state)

{

case TelephonyManager.CALL_STATE_IDLE:// 空闲或者挂断

// 挂断就停止录音

stopRecord();

break;

case TelephonyManager.CALL_STATE_RINGING:// 响铃

// 响铃什么都不做

break;

case TelephonyManager.CALL_STATE_OFFHOOK:// 接起电话

// 接起电话开始录音

recordCalling();

break;

default:

break;

}

}

};

private void stopRecord()

{

if (recording)

{

Log.v("TAG", "stopRecord");

recorder.stop();

recorder.release();// 释放资源

}

}

private void recordCalling()

{

try

{

Log.v("TAG", "recordCalling");

recorder = new MediaRecorder();

recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

recorder.setOutputFile(Environment.getExternalStorageDirectory()

.getAbsolutePath()+"/" + System.currentTimeMillis() + ".3gp");

recorder.prepare();

recorder.start();

recording = true;

}catch (Exception e)

{

e.printStackTrace();

}

}

}

配置文件：

[html] view
plaincopy

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.song"

android:versionCode="1"

android:versionName="1.0">

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

<application android:icon="@drawable/icon" android:label="@string/app_name">

<activity android:name=".PhoneListenerActivity"

android:label="@string/app_name">

<intent-filter>

<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />

</intent-filter>

</activity>

<service android:name=".PhoneListenerService">

<intent-filter>

<action android:name="recordingFlag"/>

</intent-filter>

</service>

</application>

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

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

<!-- 向sdcard中写数据的权限 -->

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

</manifest>