code: public void stop() {
          releaseWakeLock();
          if (null != recorder && prepared && recording) {
              try {
                  recorder.stop();
                  recorder.reset();
                  recorder.release();
                  prepared = false;
                  recording = false;
                  recorder = null;
                  if (!wannaCancel && null != mOnRecordPreparedListener) {
                      mOnRecordPreparedListener.onRecordComplete(fullPath);
                  }
              } catch (Exception e) {
                  e.printStackTrace();
              }
          }
      }
docs: 停止录制