Android停止录制失败

我要启动一个服务来开始录音。当我试图停止时，它显示以下消息

06-27 17:21:30.138: E/MediaRecorder(6122): stop called in an invalid state: 0

我不确定上传数据到服务器等其他功能是否会影响结果（在Asyck任务中未实现，仅调用方法）

如果我没有捕获运行时异常，有时它可能会显示处理程序异常（完成活动，停止录制）

开始录音

06-28 09:14:47.646: E/MediaRecorder(3089): start failed: -38
06-28 09:14:47.646: W/System.err(3089): java.lang.IllegalStateException
06-28 09:14:47.646: W/System.err(3089):     at android.media.MediaRecorder.start(Native Method)
06-28 09:14:47.646: W/System.err(3089):     at tvbpv.test.EOrderSystem1.RecordService.startRecording(RecordService.java:87)
06-28 09:14:47.646: W/System.err(3089):     at tvbpv.test.EOrderSystem1.RecordService.onStart(RecordService.java:49)
06-28 09:14:47.646: W/System.err(3089):     at android.app.Service.onStartCommand(Service.java:438)
06-28 09:14:47.646: W/System.err(3089):     at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:2371)
06-28 09:14:47.646: W/System.err(3089):     at android.app.ActivityThread.access$1900(ActivityThread.java:127)
06-28 09:14:47.646: W/System.err(3089):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1222)
06-28 09:14:47.646: W/System.err(3089):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-28 09:14:47.646: W/System.err(3089):     at android.os.Looper.loop(Looper.java:137)
06-28 09:14:47.646: W/System.err(3089):     at android.app.ActivityThread.main(ActivityThread.java:4519)
06-28 09:14:47.646: W/System.err(3089):     at java.lang.reflect.Method.invokeNative(Native Method)
06-28 09:14:47.646: W/System.err(3089):     at java.lang.reflect.Method.invoke(Method.java:511)
06-28 09:14:47.646: W/System.err(3089):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:794)
06-28 09:14:47.646: W/System.err(3089):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:561)
06-28 09:14:47.646: W/System.err(3089):     at dalvik.system.NativeStart.main(Native Method)

下面是我的代码

RecordService.java


private MediaRecorder recorder;
private File instanceRecord;
private boolean recording= false;
@Override
public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
}



@Override
public void onStart(Intent intent, int startId) {
    startRecording();       
    super.onStart(intent, startId);
}



@Override
public void onDestroy() {
    stopRecording();
    super.onDestroy();
}

private void prepareRecording()
{
    try
    {
        recorder.prepare();
    }
    catch(IllegalStateException e)
    {
        e.printStackTrace();

    } 
    catch (IOException e) 
    {
        e.printStackTrace();
    }
}

public  void startRecording(){

    try {

    recorder = new MediaRecorder();
    recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

    Date today = Calendar.getInstance().getTime();    
    Format formatter = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss");
    String reportDate = formatter.format(today);


    File instanceRecordDirectory = new File(Environment.getExternalStorageDirectory() + File.separator + "TVB_PV_recordings");

    if(!instanceRecordDirectory.exists()){
        instanceRecordDirectory.mkdirs();
    }

    instanceRecord = new File(instanceRecordDirectory.getAbsolutePath() + File.separator + reportDate + "_sales_recording.mp4");
    if(!instanceRecord.exists()){
        instanceRecord.createNewFile();
    }

    recorder.setOutputFile(instanceRecord.getAbsolutePath());        
    prepareRecording();
    recorder.start();
    recording = true;

    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }catch (Exception e){
        e.printStackTrace();
    }
}

public  void stopRecording() {
    if (recorder != null) {       
          try {
            recorder.stop();
          } catch(RuntimeException e) {
              instanceRecord.delete();  //you must delete the outputfile when the recorder stop failed.
          } finally {
            recorder.release();
            recorder = null;
          }
    }                   
}


Other Activity: 

        stopService(new Intent(EOrderSystemSubmit.this, RecordService.class));      

-非常注意主题开头的图表。我敢肯定，录音未开始时，您正在呼叫停止

停止录制。在start（）之后调用此函数。一旦停止录制，您将不得不重新配置它，就像它刚刚构建一样。请注意，运行时异常是 如果调用stop（）时未收到有效的音频/视频数据，则故意将其抛出到应用程序。如果在start（）之后立即调用stop（），则会发生这种情况。该故障使应用程序可以相应地采取措施清理输出文件（例如，删除输出文件），因为发生这种情况时输出文件的构造不正确

投掷 如果在start（）之前调用，则为IllegalStateException

---

这就是文档所说的。

记录器未初始化时会引发错误。尝试在数据源初始化完成后启动记录。

---

例如，如果您试图录制呼叫，请在摘机uccors时开始录制。

您的应用程序是否具有写入外部存储的权限？是的，我已添加此权限，因此您的意思是我必须在调用服务的活动中引用异常并解决问题？我已经把它放到了其他应用程序中，并称之为后台服务，它可以工作。

RecordService.java


private MediaRecorder recorder;
private File instanceRecord;
private boolean recording= false;
@Override
public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
}



@Override
public void onStart(Intent intent, int startId) {
    startRecording();       
    super.onStart(intent, startId);
}



@Override
public void onDestroy() {
    stopRecording();
    super.onDestroy();
}

private void prepareRecording()
{
    try
    {
        recorder.prepare();
    }
    catch(IllegalStateException e)
    {
        e.printStackTrace();

    } 
    catch (IOException e) 
    {
        e.printStackTrace();
    }
}

public  void startRecording(){

    try {

    recorder = new MediaRecorder();
    recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
    recorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
    recorder.setAudioEncoder(MediaRecorder.AudioEncoder.DEFAULT);

    Date today = Calendar.getInstance().getTime();    
    Format formatter = new SimpleDateFormat("yyyy-MM-dd_HH:mm:ss");
    String reportDate = formatter.format(today);


    File instanceRecordDirectory = new File(Environment.getExternalStorageDirectory() + File.separator + "TVB_PV_recordings");

    if(!instanceRecordDirectory.exists()){
        instanceRecordDirectory.mkdirs();
    }

    instanceRecord = new File(instanceRecordDirectory.getAbsolutePath() + File.separator + reportDate + "_sales_recording.mp4");
    if(!instanceRecord.exists()){
        instanceRecord.createNewFile();
    }

    recorder.setOutputFile(instanceRecord.getAbsolutePath());        
    prepareRecording();
    recorder.start();
    recording = true;

    } catch (IllegalStateException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }catch (Exception e){
        e.printStackTrace();
    }
}

public  void stopRecording() {
    if (recorder != null) {       
          try {
            recorder.stop();
          } catch(RuntimeException e) {
              instanceRecord.delete();  //you must delete the outputfile when the recorder stop failed.
          } finally {
            recorder.release();
            recorder = null;
          }
    }                   
}


Other Activity: 

        stopService(new Intent(EOrderSystemSubmit.this, RecordService.class));