small issue whlie taking picture from camera and displaying it in an imageView

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Android

i am trying to implement an app that takes pics from native camera and display the result in an imageView. the code that i used is very inconsistent. when i run the app, it sometimes shows the image in the imageView else doesn't show the result at all.

the code that i used is as follows:

this function opens the camera app

Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                if (cameraIntent.resolveActivity(getPackageManager()) != null) {
                    // Create the File where the photo should go
                    File photoFile = null;
                    try {
                        photoFile = createImageFile();
                    } catch (IOException ex) {
                        // Error occurred while creating the File
                        Log.i(TAG, "IOException");
                    }
                    // Continue only if the File was successfully created
                    if (photoFile != null) {
                        cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
                        startActivityForResult(cameraIntent, REQUEST_IMAGE_CAPTURE);
                    }
                }

this function is used to save the image the the device memory

String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
        String imageFileName = "JPEG_" + timeStamp + "_";
        File storageDir = Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_PICTURES);
        File image = File.createTempFile(
                imageFileName,  // prefix
                ".jpg",         // suffix
                storageDir      // directory
        );

        // Save a file: path for use with ACTION_VIEW intents
        mCurrentPhotoPath = "file:" + image.getAbsolutePath();
        return image;

protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
            try {
                if (mImageBitmap == null) {
                    Toast.makeText(getApplicationContext(), "Unable to Process. Please adjust camera Resolution", Toast.LENGTH_SHORT).show();
                } else {
                    mImageBitmap = MediaStore.Images.Media.getBitmap(this.getContentResolver(), Uri.parse(mCurrentPhotoPath));
                    imageView.setImageBitmap(mImageBitmap);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }