Android--service服务--MediaRecorder--电话录音

一、通过Intent启动服务：

package com.jiangge.callstatuslistener;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);

Intent intent = new Intent(this, PhoneStatusService.class);
startService(intent);
}
}

二、PhoneStatusService.java

package com.jiangge.callstatuslistener;

import java.io.IOException;

import android.app.Service;
import android.content.Intent;
import android.media.MediaRecorder;
import android.os.IBinder;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;

public class PhoneStatusService extends Service {

@Override
public IBinder onBind(Intent intent) {
return null;
}

@Override
public void onCreate() {
super.onCreate();
System.out.println("===>>>服务被创建了");
TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
tm.listen(new MyPhoneStatusListener(), PhoneStateListener.LISTEN_CALL_STATE);// 监听手机的通话状态的变化
}

private class MyPhoneStatusListener extends PhoneStateListener {
MediaRecorder recorder;
@Override
public void onCallStateChanged(int state, String incomingNumber) {
super.onCallStateChanged(state, incomingNumber);
try {
switch (state) {
case TelephonyManager.CALL_STATE_IDLE: // 空闲状态，没有通话没有响铃
if (recorder != null) {
recorder.stop();
recorder.reset();
recorder.release();
recorder = null;
}
break;
case TelephonyManager.CALL_STATE_RINGING: // 响铃状态
System.out.println("发现来电号码" + incomingNumber);
recorder = new MediaRecorder();// 创建一个录音机
recorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置录制的音频源从话筒里面获取声音
recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
recorder.setOutputFile("/sdcard/" + System.currentTimeMillis() + ".3gp");
recorder.prepare();

break;
case TelephonyManager.CALL_STATE_OFFHOOK: // 通话状态
if (recorder != null) {
recorder.start();
}
break;
}
} catch (Exception e) {
e.printStackTrace();
}
}
}

@Override
public void onDestroy() {
super.onDestroy();
System.out.println("===>>>服务被销毁了");
}

}

注：/sdcard 不要硬编码

Do not hardcode "/sdcard/"; use Environment.getExternalStorageDirectory().getPath()instead

三、清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.jiangge.callstatuslistener"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="17" />
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.RECORD_AUDIO"/>

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.jiangge.callstatuslistener.MainActivity"
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=".PhoneStatusService" >
</service>
</application>

</manifest>

注，权限：

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

效果图：



项目文件结构：



注：MediaRecorder文档中写得很清楚的。