Android 媒体扫描程序正在运行

在我的应用程序中，用户通过摄像头功能捕获图像，然后我将在网格视图中更新图像。但在长时间搜索后，这些图像没有更新，我发现需要手动运行media scanner。我为此编写了代码。但当我重复捕获图像时，会出现错误。下面我发布了我的日志cat错误

11-05 17:17:17.565: E/AndroidRuntime(30801): FATAL EXCEPTION: main
11-05 17:17:17.565: E/AndroidRuntime(30801): java.lang.IllegalStateException: not connected to MediaScannerService
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.media.MediaScannerConnection.scanFile(MediaScannerConnection.java:164)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at com.imagedatabase.Category$6.onMediaScannerConnected(Category.java:512)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.media.MediaScannerConnection.onServiceConnected(MediaScannerConnection.java:249)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.app.ActivityThread$PackageInfo$ServiceDispatcher.doConnected(ActivityThread.java:1247)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.app.ActivityThread$PackageInfo$ServiceDispatcher$RunConnection.run(ActivityThread.java:1264)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.os.Handler.handleCallback(Handler.java:587)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.os.Handler.dispatchMessage(Handler.java:92)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.os.Looper.loop(Looper.java:123)
11-05 17:17:17.565: E/AndroidRuntime(30801):    at android.app.ActivityThread.main(ActivityThread.java:4627)

下面我发布了我的代码，我将在其中运行这一个，我解释了评论中的每一步

    enter code here

   public class ButtonClickHandler implements View.OnClickListener {
    public void onClick(View view) {

        //when camera button is pressed it starts 
            startCameraActivity();


    }
}




public void startCameraActivity() {

       //seperating the images with date




    Date date = new Date();
    DateFormat df = new SimpleDateFormat("yyyy-MM-dd-kk-mm-ss");
    String newPicFile = df.format(date);



    direct = new File(Environment.getExternalStorageDirectory() + path
            + "/" + newPicFile + ".jpg");



    outputFileUri = Uri.fromFile(direct);

                           //here i am starting the  camra 



    Intent intent = new Intent(
            android.provider.MediaStore.ACTION_IMAGE_CAPTURE);

    intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);

    startActivityForResult(intent, 0);




   }




enter code here

      public void onActivityResult(int requestCode, int resultCode, Intent data) {
    Log.i("image data base", "resultCode: " + resultCode);
    switch (resultCode) {
    case 0:
                        //when user cancel the image take here i am deleted the urifile


        File file = new File(outputFileUri.getPath());
        boolean deleted = file.delete();

        Log.i("image data based", "User cancelled");
        break;

    case -1:
        onPhotoTaken();

        break;
    }
     }

//在这张拍摄的照片中，我为媒体扫描仪编写了代码

enter code here
protected void onPhotoTaken() {

    Log.i("MakeMachine", "onPhotoTaken");

    taken = true;
    SharedPreferences path_shared = Category.this.getSharedPreferences(
            "path", MODE_WORLD_WRITEABLE);
    imagePath = path_shared.getString("mypath", "0");

    File newFile = new File(imagePath);
    final Uri outputFileUri = Uri.fromFile(newFile);

    mScanner = new MediaScannerConnection(Category.this,
            new MediaScannerConnection.MediaScannerConnectionClient() {
                public void onMediaScannerConnected() {

        mScanner.scanFile(outputFileUri.getPath(), null /* mimeType */);
                }

                public void onScanCompleted(String path, Uri uri) {

            if (path.equals(outputFileUri.getPath())) {
            mScanner.disconnect();
        // we need to create new UI thread because, we can't
    // update our mail thread from here
        // Both the thread will run one by one, see
                        // documentation of android
            Category.this.runOnUiThread(new Runnable() {
                            public void run() {

                            }
                        });
                    }
                }
            });
    mScanner.connect();
               }

我希望你明白我的观点，我也试过了

     sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,Uri.parse("file://" + \
      outputFileUri+  Environment. getExternalStorageDirectory())));

但是它有点慢，我认为它扫描整个sd卡。所以，请任何人告诉我如何运行媒体扫描程序，以及在哪里可以运行我的代码。我搜索了很多，但这些都不能满足我的需要