android - 媒体记录器 : stop called in an invalid state: 1

Question

我是安卓新手。我创建了一个屏幕录像机应用程序。所有事情都已完成，但问题是当我停止屏幕录像机时，它不会停止，并且会发生此错误。当在谷歌上搜索此错误时，我发现 MediaRecorder 未启动，但当我检查我的 SD 卡时，然后捕获了视频已保存。我遵循本教程 here .
当我开始录制视频时，点击后弹出一个通知然后通知停止消息然后使用服务我尝试停止 mediaRecorder 停止但它没有停止并且发生错误。如果有人可以帮助我那么谢谢提前。

问题MediaRecorder.stop() 不工作。

MainActivity.java

public class MainActivity extends Activity {

    private static final int REQUEST_CODE = 1000;
    private static final String TAG = "MainActivity";

    private ScreenRecorder mScreenRecorder;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        mScreenRecorder = RecorderApplication.getApplication(this).getRecorder();
        shareScreen();
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode != REQUEST_CODE) {
            Log.e(TAG, "Unknown request code: " + requestCode);

            return;
        }
        if (resultCode != RESULT_OK) {
            Toast.makeText(this, "Screen Cast Permission Denied", Toast.LENGTH_SHORT).show();
            return;
        }
        mScreenRecorder.initRecorder();
        mScreenRecorder.initShareScreen(resultCode, data);
        finish();
    }

    private void shareScreen() {
        if (mScreenRecorder.getMediaProjection() == null) {
            Log.i("getMediaProjection()..."," is null");
            startActivityForResult(mScreenRecorder.getMediaProjectionManager().createScreenCaptureIntent(), REQUEST_CODE);
            return;
        }
        mScreenRecorder.initRecorder();
        mScreenRecorder.shareScreen();
        finish();
    }
}

ScreenRecorder.java

public class ScreenRecorder {

    private Context mContext;
    private WindowManager mWindowManager;

    private int mScreenDensity;
    private MediaProjectionManager mProjectionManager;
    private MediaProjection mMediaProjection;
    private VirtualDisplay mVirtualDisplay;
    private Surface surface;
    private MediaProjectionCallback mMediaProjectionCallback;
    public MediaRecorder mMediaRecorder;
    private String mTargetRecordFileName;
    private String mTargetRecordFilePath;

    private static final SparseIntArray ORIENTATIONS = new SparseIntArray();

    public static final String NOTIFICATION_EXTRA = "Extra";
    public static final int EXTRA_PLAY = 0;
    public static final int EXTRA_PAUSE = 1;
    public static final int EXTRA_STOP = 2;
    public int flag = 0;

    static {
        ORIENTATIONS.append(Surface.ROTATION_0, 90);
        ORIENTATIONS.append(Surface.ROTATION_90, 0);
        ORIENTATIONS.append(Surface.ROTATION_180, 270);
        ORIENTATIONS.append(Surface.ROTATION_270, 180);
    }

    public ScreenRecorder(Context context, WindowManager windowManager) {
        mContext = context;
        mWindowManager = windowManager;

        DisplayMetrics metrics = new DisplayMetrics();
        mWindowManager.getDefaultDisplay().getMetrics(metrics);
        mScreenDensity = metrics.densityDpi;

        mMediaRecorder = new MediaRecorder();
        mProjectionManager = (MediaProjectionManager) mContext.getSystemService(Context.MEDIA_PROJECTION_SERVICE);
    }

    public MediaProjection  getMediaProjection() {
        return mMediaProjection;
    }

    public MediaProjectionManager getMediaProjectionManager() {
        return mProjectionManager;
    }

    public void initShareScreen(int resultCode, Intent data) {
        mMediaProjectionCallback = new MediaProjectionCallback();
        mMediaProjection = mProjectionManager.getMediaProjection(resultCode, data);
        mMediaProjection.registerCallback(mMediaProjectionCallback, null);

        shareScreen();
    }

    public void shareScreen() {
        mVirtualDisplay = createVirtualDisplay();
        mMediaRecorder.start();
        flag = 1;
        Log.i("shareScreen()...","mMediaRecorder.start()");
        Log.i("shareScreen()...",".."+flag);
//      showRunningNotification();
        showControlNotification();
    }

    private VirtualDisplay createVirtualDisplay() {
        int screen_width = mContext.getResources().getDisplayMetrics().widthPixels;
        int screen_height = mContext.getResources().getDisplayMetrics().heightPixels;
        surface = mMediaRecorder.getSurface();
        return mMediaProjection.createVirtualDisplay("MainActivity",
                screen_width, screen_height, mScreenDensity,
                DisplayManager.VIRTUAL_DISPLAY_FLAG_AUTO_MIRROR,
                mMediaRecorder.getSurface(), null, null);
    }

    public void initRecorder() {
        SharedPreferences mSharedPreferences = PreferenceManager.getDefaultSharedPreferences(mContext);
        int screen_width = mContext.getResources().getDisplayMetrics().widthPixels;
        int screen_height = mContext.getResources().getDisplayMetrics().heightPixels;


        Log.i("initRecorder()...", " Initialization is Completed");

        try {

            mMediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
            mMediaRecorder.setVideoSource(MediaRecorder.VideoSource.SURFACE);
            mMediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
            mMediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
            mMediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H264);
            mMediaRecorder.setVideoSize(screen_width, screen_height);
            mMediaRecorder.setVideoFrameRate(30);
            mMediaRecorder.setOutputFile(getSaveVideoFolder());
            mMediaRecorder.setVideoEncodingBitRate(512 * 1000);


            mMediaRecorder.prepare();
            System.out.println("..........Media Recorder is Ready for Recording......");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private String getSaveVideoFolder() {
        File folder = new File(Environment.getExternalStorageDirectory()
                + "/ScreenRecorder");
        if (!folder.exists()) {
            folder.mkdirs();
        }
        mTargetRecordFileName = Utils.convertDateToString(new Date()) + ".mp4";
        mTargetRecordFilePath = folder.getAbsolutePath() + "/"
                + mTargetRecordFileName;
        return mTargetRecordFilePath;
    }

    private class MediaProjectionCallback extends MediaProjection.Callback {
        @Override
        public void onStop() {

            mMediaRecorder.stop();
            mMediaRecorder.reset();
            Log.v("ScreenRecorder...", "Recording Stopped");

            mMediaProjection = null;
            stopScreenSharing();
        }
    }

    private void stopScreenSharing() {
        if (mVirtualDisplay == null) {
            return;
        }
        mVirtualDisplay.release();
        // mMediaRecorder.release(); //If used: mMediaRecorder object cannot
        // be reused again
        destroyMediaProjection();
    }

    private void destroyMediaProjection() {

        Log.i("destroyMediaProjection()...","called");
        if (mMediaProjection != null) {
            mMediaProjection.unregisterCallback(mMediaProjectionCallback);
            mMediaProjection.stop();
//          mMediaProjection = null;
            Log.i("destroyMediaProjection()...","not null");
        }
    }

    private static int NOTIFICATION_RUNNING = 109;
    private static int NOTIFICATION_CONTROL = 110;
    private static int NOTIFICATION_DONE = 111;


    private void showControlNotification() {
        Intent intentPause = new Intent(mContext, FloatingViewService.class);
        intentPause.setAction("PAUSE");

        PendingIntent pIntentPause = PendingIntent.getService(mContext, 0,
                intentPause, 0);



        Intent intentStop = new Intent(mContext, FloatingViewService.class);
        intentStop.setAction("STOP");

        PendingIntent pIntentStop = PendingIntent.getService(mContext, 0, intentStop, 0);

        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
                mContext);
        mBuilder.setSmallIcon(R.drawable.ic_notification);
        mBuilder.setVisibility(NotificationCompat.VISIBILITY_PUBLIC);
        mBuilder.setContentTitle("Recording controls");
        mBuilder.setPriority(Notification.PRIORITY_MAX);
        mBuilder.setOngoing(true);
        mBuilder.setWhen(0);
        // if (!isPauseRecorder) {
        // mBuilder.addAction(R.drawable.ic_action_pause, "PAUSE",
        // pIntentPause);
        // } else {
        // mBuilder.addAction(R.drawable.ic_action_video, "RESUME",
        // pIntentPause);
        // }
        mBuilder.addAction(R.drawable.ic_action_stop, "STOP", pIntentStop);

        Notification notification = mBuilder.build();
        notification.flags = Notification.FLAG_ONGOING_EVENT | Notification.FLAG_NO_CLEAR;

        NotificationManager mNotificationManager = (NotificationManager) mContext
                .getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.notify(NOTIFICATION_CONTROL, notification);
    }

    public void stopRecorder() {
        try {
            if (mMediaRecorder != null){

                Log.i("flag...","..."+flag);
                mMediaRecorder.stop();
                mMediaRecorder.reset();
//              mMediaProjection.stop();

                stopScreenSharing();

            }else{

                Log.i("mMediaRecorder...in stopRecorder()"," is null");
            }


        }catch (Exception e){
            Log.e("Error to stop media recorder in stopRecorder() method... :- "," "+e.getMessage());
            e.printStackTrace();
        }

        NotificationManager mNotificationManager = (NotificationManager) mContext
                .getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.cancel(NOTIFICATION_CONTROL);
        mNotificationManager.cancel(NOTIFICATION_RUNNING);

//      showDoneNotification();
        // TODO save info to database
        DatabaseHelper mDatabaseHelper = new DatabaseHelper(mContext);
        mDatabaseHelper.addVideo(mTargetRecordFilePath);

        // appendToFile(mTargetRecordFileName, getTemporaryFileName());
    }

    private String getTemporaryFileName() {
        return mContext.getExternalCacheDir().getAbsolutePath()
                + File.separator + "tmprecord.mp4";
    }

    private void appendToFile(@NonNull final String targetFileName,
                              @NonNull final String newFileName) {
        Mp4ParserWrapper.append(targetFileName, newFileName);
    }
}

FloatingViewService.java

public class FloatingViewService extends Service {

    private WindowManager windowManager;
    private View floatingView;
    private TextView mTextCoolDown;
    private WindowManager.LayoutParams params;
    private WindowManager.LayoutParams paramsCoolDown;

    private ImageView btnCamera;
    private ImageView btnSettings;
    private ImageView btnAlbum;
    private ImageView btnExit;

    public static final String NOTIFICATION = "com.example.screenrecorder";

    private ScreenRecorder mScreenRecorder ;
    private ScreenRecorder mScreenRecorder1 ;
    private int cooldown = 3;

    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        windowManager = (WindowManager)this.getSystemService(Context.WINDOW_SERVICE);
        mScreenRecorder = new ScreenRecorder(getApplicationContext(), windowManager);

        if (intent != null) {

            if (intent.getAction() != null) {

                Log.i("intent Action...",intent.getAction());

                if (intent.getAction().equals("PAUSE")) {

                } else if (intent.getAction().equals("STOP")) {
                    mScreenRecorder.stopRecorder();
                    try{
                        showFloatingView();

                    }catch (RuntimeException e){

                    }
                } 
            }
        }

        return START_STICKY;
    }

    @Override
    public void onCreate() {
        super.onCreate();

        initView();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (floatingView != null)
            windowManager.removeView(floatingView);
    }

    private void initView() {
        windowManager = (WindowManager) getSystemService(WINDOW_SERVICE);

        int screen_height = getResources().getDisplayMetrics().heightPixels;

        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        floatingView = inflater.inflate(R.layout.floating_view, null);

        params = new WindowManager.LayoutParams(
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.WRAP_CONTENT,
                WindowManager.LayoutParams.TYPE_PHONE,
                WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
                PixelFormat.TRANSLUCENT);

        params.gravity = Gravity.TOP | Gravity.LEFT;
        params.x = 0;
        params.y = 100;

        btnCamera = (ImageView) floatingView.findViewById(R.id.btn_camera);
        btnSettings = (ImageView) floatingView.findViewById(R.id.btn_settings);
        btnAlbum = (ImageView) floatingView.findViewById(R.id.btn_album);
        btnExit = (ImageView) floatingView.findViewById(R.id.btn_close);

        btnCamera.setOnTouchListener(new OnItemTouchListener(0));
        btnSettings.setOnTouchListener(new OnItemTouchListener(1));
        btnAlbum.setOnTouchListener(new OnItemTouchListener(2));

        btnExit.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View arg0) {
                stopSelf();

            }
        });

        setFloatingViewMove();

    }

    private void showFloatingView() {
        windowManager.addView(floatingView, params);
    }

    private void hideFloatingView() {
        windowManager.removeView(floatingView);
    }

    private int mAction = -1;
    long onTouchTime = -1;
    long TIME_CLICK = 200;

    private class OnItemTouchListener implements OnTouchListener {

        private int action;

        public OnItemTouchListener(int action) {
            this.action = action;
        }

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                mAction = action;
                v.setBackgroundResource(R.drawable.bg_item_selected);
                onTouchTime = System.currentTimeMillis();
                break;
            }
            return false;
        }
    }

    private void setFloatingViewMove() {
        floatingView.setOnTouchListener(new OnTouchListener() {
            private int initialX;
            private int initialY;
            private float initialTouchX;
            private float initialTouchY;

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                switch (event.getAction()) {
                case MotionEvent.ACTION_DOWN:
                    initialX = params.x;
                    initialY = params.y;
                    initialTouchX = event.getRawX();
                    initialTouchY = event.getRawY();
                    break;
                case MotionEvent.ACTION_UP:
                    Log.d("phucdl", "start recorder " + (System.currentTimeMillis() - onTouchTime));

                    if (System.currentTimeMillis() - onTouchTime < TIME_CLICK) {
                        Intent intent;

                        switch (mAction) {
                        case 0:
                            if (RecorderApplication.getApplication(FloatingViewService.this).getRecorder() == null) {
                                mScreenRecorder = new ScreenRecorder(FloatingViewService.this, windowManager);
                                RecorderApplication.getApplication(FloatingViewService.this).setRecorder(mScreenRecorder);
                            }
                            intent = new Intent(FloatingViewService.this, MainActivity.class);
                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            startActivity(intent);
                            hideFloatingView();
                            break;
                        case 1:
                            intent = new Intent(FloatingViewService.this, PreferencesActivity.class);
                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            startActivity(intent);
                            hideFloatingView();
                            break;
                        case 2:
                            intent = new Intent(FloatingViewService.this, AlbumActivity.class);
                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                            startActivity(intent);
                            hideFloatingView();
                            break;

                        default:
                            break;
                        }
                    }

                    btnCamera.setBackgroundDrawable(null);
                    btnSettings.setBackgroundDrawable(null);
                    btnAlbum.setBackgroundDrawable(null);
                    btnExit.setBackgroundDrawable(null);
                    break;
                case MotionEvent.ACTION_MOVE:
                    params.x = initialX
                            + (int) (event.getRawX() - initialTouchX);
                    params.y = initialY
                            + (int) (event.getRawY() - initialTouchY);
                    windowManager.updateViewLayout(floatingView, params);
                    break;
                }
                return false;
            }
        });
    }
}

日志是

08-17 20:43:07.537 13733-13733/com.example.screenrecorder E/MediaRecorder: stop called in an invalid state: 1
08-17 20:43:07.537 13733-13733/com.example.screenrecorder E/Error to stop media recorder in stopRecorder() method... :-:  null
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err: java.lang.IllegalStateException
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err:     at android.media.MediaRecorder.stop(Native Method)
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err:     at com.gameapp.screenrecorder.ScreenRecorder.stopRecorder(ScreenRecorder.java:371)
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err:     at com.gameapp.screenrecorder.FloatingViewService.onStartCommand(FloatingViewService.java:59)
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err:     at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3010)
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err:     at android.app.ActivityThread.-wrap17(ActivityThread.java)
08-17 20:43:07.537 13733-13733/com.example.screenrecorder W/System.err:     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1442)
08-17 20:43:07.538 13733-13733/com.example.screenrecorder W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:102)
08-17 20:43:07.538 13733-13733/com.example.screenrecorder W/System.err:     at android.os.Looper.loop(Looper.java:148)
08-17 20:43:07.538 13733-13733/com.example.screenrecorder W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:5417)
08-17 20:43:07.538 13733-13733/com.example.screenrecorder W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
08-17 20:43:07.538 13733-13733/com.example.screenrecorder W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
08-17 20:43:07.538 13733-13733/com.example.screenrecorder W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
08-17 20:43:07.732 13733-13750/com.example.screenrecorder W/EGL_emulation: eglSurfaceAttrib not implemented
08-17 20:43:07.732 13733-13750/com.example.screenrecorder W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xed6bf5a0, error=EGL_SUCCESS
08-17 20:43:09.433 13733-13750/com.example.screenrecorder E/Surface: getSlotFromBufferLocked: unknown buffer: 0xee9722a0

Answer 1

您第一次在 FloatingViewService 类中的 setFloatingViewMove() 方法中创建了一个 ScreenRecorder 类的对象，这没问题，但是当您单击 Stop 时您再次创建 ScreenRecorder 类对象，然后调用它的构造函数，并且您之前的 MediaRacoder 对象是新初始化的，然后在您调用 stop 方法之后，但未调用 mediarecoder start 方法新初始化的 mediarecorder 实例，这就是发生此异常的原因.
只需在 FloatingViewService 类的 onStartCommand() 方法中命令或删除一行。我希望这能解决您的问题。

 @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        windowManager = (WindowManager)this.getSystemService(Context.WINDOW_SERVICE);
       // mScreenRecorder = new ScreenRecorder(getApplicationContext(), windowManager);
}