android ʵÏÖ¼Òô´úÂë

1. package com.coolsoft.app.oklight;
3. import java.io.File;
4. import java.io.IOException;
6. import android.media.MediaRecorder;
7. import android.os.Handler;
8. import android.util.Log;
9. import android.widget.ImageView;
11. /**
12. * amrÒôƵ´¦Àí
13. *
14. * @author hongfa.yy
15. * @version ´´½¨Ê±¼ä2012-11-21 ÏÂÎç4:33:28
16. */
17. public class RecordManager {
18. private final String TAG = "RecordManager";
19. private MediaRecorder mMediaRecorder;
20. public static final int MAX_LENGTH = 1000 * 60 * 10;// ×î´ó¼Òôʱ³¤1000*60*10;
21. private File file;
23. public RecordManager(File file,ImageView view) {
24. this.file = file;
25. this.view=view;
26. }
27. public RecordManager(File file) {
28. this.file = file;
29. }
31. private long startTime;
32. private long endTime;
34. /**
35. * ¿ªÊ¼Â¼Òô ʹÓÃamr¸ñʽ
36. *
37. * @param mRecAudioFile
38. * ¼ÒôÎļþ
39. * @return
40. */
41. public void startRecord() {
42. // ¿ªÊ¼Â¼Òô
43. /* ¢ÙInitial：ʵÀý»¯MediaRecorder¶ÔÏó */
44. if (mMediaRecorder == null)
45. mMediaRecorder = new MediaRecorder();
46. try {
47. /* ¢ÚsetAudioSource/setVedioSource */
48. mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);// ÉèÖÃÂó¿Ë·ç
49. /*
50. * ¢ÚÉèÖÃÊä³öÎļþµÄ¸ñʽ：THREE_GPP/MPEG-4/RAW_AMR/Default THREE_GPP(3gp¸ñʽ
51. * ，H263ÊÓƵ/ARMÒôƵ±àÂë)¡¢MPEG-4¡¢RAW_AMR(Ö»Ö§³ÖÒôƵÇÒÒôƵ±àÂëÒªÇóΪAMR_NB)
52. */
53. mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.AMR_NB);
54. /* ¢ÚÉèÖÃÒôƵÎļþµÄ±àÂë：AAC/AMR_NB/AMR_MB/Default ÉùÒôµÄ（²¨ÐÎ）µÄ²ÉÑù */
55. mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
56. /* ¢Û×¼±¸ */
57. mMediaRecorder.setOutputFile(file.getAbsolutePath());
58. mMediaRecorder.setMaxDuration(MAX_LENGTH);
59. mMediaRecorder.prepare();
60. /* ¢Ü¿ªÊ¼ */
61. mMediaRecorder.start();
62. // AudioRecord audioRecord.
63. /* »ñÈ¡¿ªÊ¼Ê±¼ä* */
64. startTime = System.currentTimeMillis();
65. // pre=mMediaRecorder.getMaxAmplitude();
66. updateMicStatus();
67. Log.i("ACTION_START", "startTime" + startTime);
68. } catch (IllegalStateException e) {
69. Log.i(TAG,
70. "call startAmr(File mRecAudioFile) failed!"
71. + e.getMessage());
72. } catch (IOException e) {
73. Log.i(TAG,
74. "call startAmr(File mRecAudioFile) failed!"
75. + e.getMessage());
76. }
78. }
80. /**
81. * ֹͣ¼Òô
82. *
83. * @param mMediaRecorder
84. */
85. public long stopRecord() {
86. if (mMediaRecorder == null)
87. return 0L;
88. endTime = System.currentTimeMillis();
89. Log.i("ACTION_END", "endTime" + endTime);
90. mMediaRecorder.stop();
91. mMediaRecorder.reset();
92. mMediaRecorder.release();
93. mMediaRecorder = null;
94. Log.i("ACTION_LENGTH", "Time" + (endTime - startTime));
95. return endTime - startTime;
96. }
98. private final Handler mHandler = new Handler();
99. private Runnable mUpdateMicStatusTimer = new Runnable() {
100. public void run() {
101. updateMicStatus();
102. }
103. };
105. /**
106. * ¸üл°Í²×´Ì¬ ·Ö±´ÊÇÒ²¾ÍÊÇÏà¶ÔÏì¶È ·Ö±´µÄ¼ÆË㹫ʽK=20lg(Vo/Vi) Voµ±Ç°Õñ·ùÖµ Vi»ù׼ֵΪ600：ÎÒÊÇÔõôÖƶ¨»ù×¼ÖµµÄÄØ？ µ±20
107. * * Math.log10(mMediaRecorder.getMaxAmplitude() / Vi)==0µÄʱºòvi¾ÍÊÇÎÒËùÐèÒªµÄ»ù×¼Öµ
108. * µ±ÎÒ²»¶Ô×ÅÂó¿Ë·ç˵Èκλ°µÄʱºò，²âÊÔ»ñµÃµÄmMediaRecorder.getMaxAmplitude()Öµ¼´Îª»ù×¼Öµ¡£
109. * Log.i("mic_", "Âó¿Ë·çµÄ»ù×¼Öµ：" + mMediaRecorder.getMaxAmplitude());Ç°Ìáʱ²»¶ÔÂó¿Ë·ç˵Èκλ°
110. */
111. private int BASE = 600;
112. private int SPACE = 200;// ¼ä¸ôÈ¡Ñùʱ¼ä
113. private ImageView view;
115. private void updateMicStatus() {
116. if (mMediaRecorder != null && view != null) {
117. // int vuSize = 10 * mMediaRecorder.getMaxAmplitude() / 32768;
118. int ratio = mMediaRecorder.getMaxAmplitude() / BASE;
119. int db = 0;// ·Ö±´
120. if (ratio > 1)
121. db = (int) (20 * Math.log10(ratio));
122. System.out.println("·Ö±´Öµ："+db+" "+Math.log10(ratio));
123. switch (db / 4) {
124. case 0:
125. view.setImageBitmap(null);
126. break;
127. case 1:
128. view.setImageResource(R.drawable.logo64);
129. break;
130. case 2:
131. view.setImageResource(R.drawable.logo96);
132. break;
133. case 3:
134. view.setImageResource(R.drawable.logo124);
135. break;
136. case 4:
137. view.setImageResource(R.drawable.logo135);
138. break;
139. case 5:
140. view.setImageResource(R.drawable.logo512);
141. break;
142. default:
143. view.setImageResource(R.drawable.ic_launcher);
144. break;
145. }
146. mHandler.postDelayed(mUpdateMicStatusTimer, SPACE);
147. /*
148. * if (db > 1) { vuSize = (int) (20 * Math.log10(db)); Log.i("mic_",
149. * "Âó¿Ë·çµÄÒôÁ¿µÄ´óС：" + vuSize); } else Log.i("mic_", "Âó¿Ë·çµÄÒôÁ¿µÄ´óС：" + 0);
150. */
151. }
152. }
154. }