android2.2和2.3录音失败.解决方法

private void startRecord(Context context, Intent intent){        String path = intent.getStringExtra(AndrecorderContactHelper.FILEPATH);        recorder.setAudioSource(MediaRecorder.AudioSource.VOICE_CALL);        //        String _type = AndrecorderConfiguration.getConfiguration(context).getRecordType();        int format = OutputFormat.DEFAULT;        if (_type.equalsIgnoreCase("amr"))            format = OutputFormat.RAW_AMR;        else if (_type.equalsIgnoreCase("3gp"))            format = OutputFormat.THREE_GPP;        else if (_type.equalsIgnoreCase("mp4"))            format = OutputFormat.MPEG_4;        recorder.setOutputFormat(format);        recorder.setAudioEncoder(AAC);        recorder.setOutputFile(path);        try {            recorder.prepare();            recorder.start();        } catch (IllegalStateException e) {                        e.printStackTrace();        } catch (IOException e) {                        e.printStackTrace();        }                //        Log.i("whut", "开始录音");        recording = true;    }