Android服務（service）初步——通話錄音

啟動服務之後，監聽手機TelephonyManager狀態,根據不同情況做出選擇，源碼以及截圖如下：

生成的錄音文件：

Log日志：

這個不知道為什麼，點擊多次停止服務的時候，總是會出現下面的BUG：

圖片看不清楚，我把日志復制了出來如下：

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，麻煩告訴我，灰常感激。。。俺百度了好久不知道為啥。

源碼：

MainActivity:

1. package com.song;
3. import Android.app.Activity;
4. import android.content.Intent;
5. import android.os.Bundle;
6. import android.util.Log;
7. import android.view.View;
8. import android.widget.Button;
10. public class PhoneListenerActivity extends Activity
11. {
13. protected static final String ACTION = "recordingFlag";
14. protected static final String TAG = "TAG";
15. Button btnStart;
16. Button btnStop;
18. @Override
19. public void onCreate(Bundle savedInstanceState)
20. {
21. super.onCreate(savedInstanceState);
22. setContentView(R.layout.main);
24. btnStart = (Button) findViewById(R.id.btnstart);
25. btnStop = (Button) findViewById(R.id.btnstop);
27. btnStart.setOnClickListener(new Button.OnClickListener()
28. {
30. @Override
31. public void onClick(View v)
32. {
33. Log.v(TAG, "startService");
34. startService(new Intent(ACTION));
35. }
36. });
38. btnStop.setOnClickListener(new Button.OnClickListener()
39. {
41. @Override
42. public void onClick(View v)
43. {
44. Log.v(TAG, "stopService");
45. stopService(new Intent(ACTION));
46. }
48. });
50. }
51. }

1. package com.song;
3. import java.io.IOException;
5. import android.app.Service;
6. import android.content.Context;
7. import android.content.Intent;
8. import android.media.MediaRecorder;
9. import android.os.Environment;
10. import android.os.IBinder;
11. import android.telephony.PhoneStateListener;
12. import android.telephony.TelephonyManager;
13. import android.util.Log;
15. public class PhoneListenerService extends Service
16. {
18. private MediaRecorder recorder;
19. private boolean recording = false;
21. @Override
22. public IBinder onBind(Intent intent)
23. {
24. return null;
25. }
27. @Override
28. public void onCreate()
29. {
30. TelephonyManager manager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
31. manager.listen(listener, PhoneStateListener.LISTEN_CALL_STATE);
32. super.onCreate();
33. }
35. private PhoneStateListener listener = new PhoneStateListener()
36. {
38. @Override
39. public void onCallStateChanged(int state, String incomingNumber)
40. {
41. super.onCallStateChanged(state, incomingNumber);
42. switch (state)
43. {
44. case TelephonyManager.CALL_STATE_IDLE:// 空閒或者掛斷
45. // 掛斷就停止錄音
46. stopRecord();
47. break;
48. case TelephonyManager.CALL_STATE_RINGING:// 響鈴
49. // 響鈴什麼都不做
50. break;
51. case TelephonyManager.CALL_STATE_OFFHOOK:// 接起電話
52. // 接起電話開始錄音
53. recordCalling();
54. break;
55. default:
56. break;
57. }
58. }
59. };
61. private void stopRecord()
62. {
63. if (recording)
64. {
65. Log.v("TAG", "stopRecord");
66. recorder.stop();
67. recorder.release();// 釋放資源
68. }
69. }
71. private void recordCalling()
72. {
74. try
75. {
76. Log.v("TAG", "recordCalling");
77. recorder = new MediaRecorder();
78. recorder.setAudioSource(MediaRecorder.AudioSource.MIC);
79. recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
80. recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
81. recorder.setOutputFile(Environment.getExternalStorageDirectory()
82. .getAbsolutePath()+"/" + System.currentTimeMillis() + ".3gp");
83. recorder.prepare();
84. recorder.start();
85. recording = true;
86. }catch (Exception e)
87. {
88. e.printStackTrace();
89. }
91. }
92. }

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest xmlns:android="http://schemas.android.com/apk/res/android"
3. package="com.song"
4. android:versionCode="1"
5. android:versionName="1.0">
6. <uses-sdk android:minSdkVersion="8" />
8. <application android:icon="@drawable/icon" android:label="@string/app_name">
9. <activity android:name=".PhoneListenerActivity"
10. android:label="@string/app_name">
11. <intent-filter>
12. <action android:name="android.intent.action.MAIN" />
13. <category android:name="android.intent.category.LAUNCHER" />
14. </intent-filter>
15. </activity>
17. <service android:name=".PhoneListenerService">
18. <intent-filter>
19. <action android:name="recordingFlag"/>
20. </intent-filter>
21. </service>
23. </application>
24. <uses-permission android:name="android.permission.READ_PHONE_STATE"/>
25. <uses-permission android:name="android.permission.RECORD_AUDIO"/>
26. <!-- 向sdcard中寫數據的權限 -->
27. <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
28. </manifest>