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:

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;@Overridepublic 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(){@Overridepublic void onClick(View v){Log.v(TAG, "startService");startService(new Intent(ACTION));}});btnStop.setOnClickListener(new Button.OnClickListener(){@Overridepublic void onClick(View v){Log.v(TAG, "stopService");stopService(new Intent(ACTION));}});}}

服务类：

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;@Overridepublic IBinder onBind(Intent intent){return null;}@Overridepublic void onCreate(){TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);manager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);super.onCreate();}private PhoneStateListener listener = new PhoneStateListener(){@Overridepublic 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：

<?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>