Android–service服务–MediaRecorder–电话录音

一、通过Intent启动服务：

[java][/java] view plaincopy

1. package com.jiangge.callstatuslistener;
3. import android.os.Bundle;
4. import android.app.Activity;
5. import android.content.Intent;
6. import android.view.Menu;
8. public class MainActivity extends Activity {
10.     @Override
11.     protected void onCreate(Bundle savedInstanceState) {
12.         super.onCreate(savedInstanceState);
13.         setContentView(R.layout.activity_main);
15.         Intent intent = new Intent(this, PhoneStatusService.class);
16.         startService(intent);
17.     }
18. }

二、PhoneStatusService.java

[java][/java] view plaincopy

1. package com.jiangge.callstatuslistener;
3. import java.io.IOException;
5. import android.app.Service;
6. import android.content.Intent;
7. import android.media.MediaRecorder;
8. import android.os.IBinder;
9. import android.telephony.PhoneStateListener;
10. import android.telephony.TelephonyManager;
12. public class PhoneStatusService extends Service {
14.     @Override
15.     public IBinder onBind(Intent intent) {
16.         return null;
17.     }
19.     @Override
20.     public void onCreate() {
21.         super.onCreate();
22.         System.out.println(“===>>>服务被创建了”);
23.         TelephonyManager tm = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
24.         tm.listen(new MyPhoneStatusListener(), PhoneStateListener.LISTEN_CALL_STATE);// 监听手机的通话状态的变化
25.     }
27.     private class MyPhoneStatusListener extends PhoneStateListener {
28.         MediaRecorder recorder;
29.         @Override
30.         public void onCallStateChanged(int state, String incomingNumber) {
31.             super.onCallStateChanged(state, incomingNumber);
32.             try {
33.                 switch (state) {
34.                 case TelephonyManager.CALL_STATE_IDLE: // 空闲状态，没有通话没有响铃
35.                     if (recorder != null) {
36.                         recorder.stop();
37.                         recorder.reset();
38.                         recorder.release();
39.                         recorder = null;
40.                     }
41.                     break;
42.                 case TelephonyManager.CALL_STATE_RINGING: // 响铃状态
43.                     System.out.println(“发现来电号码” + incomingNumber);
44.                     recorder = new MediaRecorder();// 创建一个录音机
45.                     recorder.setAudioSource(MediaRecorder.AudioSource.MIC);// 设置录制的音频源从话筒里面获取声音
46.                     recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
47.                     recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
48.                     recorder.setOutputFile(“/sdcard/” + System.currentTimeMillis() + “.3gp”);
49.                     recorder.prepare();
51.                     break;
52.                 case TelephonyManager.CALL_STATE_OFFHOOK: // 通话状态
53.                     if (recorder != null) {
54.                         recorder.start();
55.                     }
56.                     break;
57.                 }
58.             } catch (Exception e) {
59.                 e.printStackTrace();
60.             }
61.         }
62.     }
64.     @Override
65.     public void onDestroy() {
66.         super.onDestroy();
67.         System.out.println(“===>>>服务被销毁了”);
68.     }
70. }

注：/sdcard 不要硬编码

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

三、清单文件：

[html][/html] view plaincopy

1. <?xml version=”1.0″ encoding=”utf-8″?>
2. <manifest xmlns:android=”http://schemas.android.com/apk/res/android”
3.     package=”com.jiangge.callstatuslistener”
4.     android:versionCode=”1″
5.     android:versionName=”1.0″ >
7.     <uses-sdk
8.         android:minSdkVersion=”8″
9.         android:targetSdkVersion=”17″ />
10.     <uses-permission android:name=”android.permission.READ_PHONE_STATE”/>
11.     <uses-permission android:name=”android.permission.WRITE_EXTERNAL_STORAGE”/>
12.     <uses-permission android:name=”android.permission.RECORD_AUDIO”/>
14.     <application
15.         android:allowBackup=”true”
16.         android:icon=”@drawable/ic_launcher”
17.         android:label=”@string/app_name”
18.         android:theme=”@style/AppTheme” >
19.         <activity
20.             android:name=”com.jiangge.callstatuslistener.MainActivity”
21.             android:label=”@string/app_name” >
22.             <intent-filter>
23.                 <action android:name=”android.intent.action.MAIN” />
25.                 <category android:name=”android.intent.category.LAUNCHER” />
26.             </intent-filter>
27.         </activity>
29.         <service android:name=”.PhoneStatusService” >
30.         </service>
31.     </application>
33. </manifest>

注，权限：

[html][/html] view plaincopy

1. <uses-permission android:name=”android.permission.READ_PHONE_STATE”/>
2. <uses-permission android:name=”android.permission.WRITE_EXTERNAL_STORAGE”/>
3. <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。