Android音頻錄音實現

　　本裡使用MediaRecorder實現音頻錄音的功能：

　　public void recording() {
　　                if (checkSDCard()) {
　　                        mRecAudioPath = Environment.getExternalStorageDirectory();
　　                        File fPath = new File(mRecAudioPath.getPath() + File.separator
　　                                        + "WJ_RecordList");
　　                        fPath.mkdirs();

　　                        mRecAudioFile = fPath;
　　                } else {
　　                        Toast.makeText(this.getContext(), "請插入SDcard", 0).show();
                       
　　                        return ;
　　                }
               
    　　            try {
    　　                    mRecAudioFile = File.createTempFile(String.valueOf("tmp_record"), ".3gp", mRecAudioFile);
    　　            } catch (IOException e) {
    　　                    Log.e("Jarvis", "mRec", e);
    　　            }
               
    　　            // instance
    　　            mRecorder = new MediaRecorder();
    　　            // 設置麥克風
    　　            mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
    　　            // 輸出文件格式
    　　            mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
    　　            // 音頻文件編碼
   　　             mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);
   　　             // 輸出文件路徑
   　　             mRecorder.setOutputFile(mRecAudioFile.getAbsolutePath());
   　　             Log.e("Jarvis", "輸出文件路徑:" + mRecAudioFile.getAbsolutePath());
               
  　　              // 准備--開始
  　　              try {
  　　                      mRecorder.prepare();
  　　                      mRecorder.start();
  　　              } catch (IllegalStateException e) {
  　　                      e.printStackTrace();
  　　              } catch (IOException e) {
  　　                      e.printStackTrace();
  　　              }
  　　      }

　　public void stopRec() {
　　                if(mRecorder != null) {
　　                        mRecorder.stop();
　　                        mRecAudioFile.getName();
　　                        Log.e("Jarvis", "Name:" + mRecAudioFile.getName()+ "~" + mRecAudioFile.getAbsolutePath());
　　                        mRecorder.release();
　　                        mRecorder = null;
　　                }
　　        }