问Android：marshmallow相机打不开？

public void getPhotoFromCamera() {
    Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    File mediaStorageDir = new File(
            Environment.getExternalStorageDirectory()
                    + File.separator
                    + getString(R.string.directory_name_corp_chat)
                    + File.separator
                    + getString(R.string.directory_name_temp)
    );

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

    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
            Locale.getDefault()).format(new Date());
    try {
        mediaFile = File.createTempFile(
                "TEMP_FULL_IMG_" + timeStamp,
                ".jpg",
                mediaStorageDir
        );
        takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(mediaFile));
        startActivityForResult(takePictureIntent, PICK_FROM_CAMERA);
    } catch (IOException e) {
        e.printStackTrace();
    }
}

private void performCrop(Uri picUri) {
    try {
        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        cropIntent.setDataAndType(picUri, "image/*");
        cropIntent.putExtra("crop", "true");
        cropIntent.putExtra("aspectX", 1);
        cropIntent.putExtra("aspectY", 1);
        cropIntent.putExtra("outputX", 128);
        cropIntent.putExtra("outputY", 128);
        // retrieve data on return
        cropIntent.putExtra("return-data", true);

        File mediaStorageDir = new File(
                Environment.getExternalStorageDirectory()
                        + File.separator
                        + getString(R.string.directory_name_corp_chat)
                        + File.separator
                        + getString(R.string.directory_name_temp)
        );

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

        String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
                Locale.getDefault()).format(new Date());
        try {
            croppedFile = File.createTempFile(
                    "TEMP_CROPPED_IMG_" + timeStamp,
                    ".jpg",
                    mediaStorageDir
            );
            cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(croppedFile));
            startActivityForResult(cropIntent, PIC_CROP);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    // respond to users whose devices do not support the crop action
    catch (ActivityNotFoundException anfe) {
        // display an error message
        String errorMessage = "Whoops - your device doesn't support the crop action!";
        Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
        toast.show();
    }
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    if (requestCode == PICK_FROM_CAMERA) {
        if (resultCode == RESULT_OK) {
            performCrop(Uri.fromFile(mediaFile));
        } else {
            Log.i("Camera", "result cancel. Hence, deleting file: " + mediaFile.getPath());
            Log.i("File deleted ", mediaFile.delete() + "");
        }
    }

    if (requestCode == PICK_FROM_GALLERY) {
        if (resultCode == RESULT_OK) {
            performCrop(data.getData());
        } else {
            Log.i("Gallery", "result cancel");
        }
    }

    if (requestCode == PIC_CROP) {
        if (resultCode == RESULT_OK) {
            imageView.setImageBitmap(BitmapFactory.decodeFile(croppedFile.getAbsolutePath()));
            if (mediaFile != null) {
                Log.i("Camera", "result cancel. Hence, deleting file: " + mediaFile.getPath());
                Log.i("File deleted ", mediaFile.delete() + "");
            }
        } else {
            if (croppedFile != null) {
                Log.i("Camera", "result cancel. Hence, deleting file: " + croppedFile.getPath());
                Log.i("File deleted ", croppedFile.delete() + "");
            }
            if (mediaFile != null) {
                Log.i("Camera", "result cancel. Hence, deleting file: " + mediaFile.getPath());
                Log.i("File deleted ", mediaFile.delete() + "");
            }
        }
    }
}