Как сделать так, чтобы изображения были закрыты для приложения и не отображались в галерее?

Я делаю приложение, чтобы щелкнуть изображения и сохранить эти изображения в папке приложения. Я хочу, чтобы мои изображения были доступны только для приложения и не отображались в галерее. Но с кодом, который я написал, мои изображения можно просматривать в галерее. Следуйте моему коду ниже

Пакет MainActicity.java com.mycamera;

import android.net.Uri;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.os.Build;
import android.widget.Button;
import android.widget.ImageView; 
import java.io.File;
import java.text.SimpleDateFormat;
import java.util.Date;
 import java.util.Locale;
 import android.content.Intent;
 import android.content.pm.PackageManager;
     import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;

 import android.os.Environment;
 import android.provider.MediaStore;
  import android.util.Log;
 import android.widget.Toast;


public class MainActivity extends ActionBarActivity {

 // Activity request codes
  private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;

  public static final int MEDIA_TYPE_IMAGE = 1;

    // directory name to store captured images and videos
   private static final String IMAGE_DIRECTORY_NAME = "Car Camera";

   private Uri fileUri; // file url to store image/video

    private ImageView imgPreview;

    private Button btnCapturePicture;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    imgPreview = (ImageView) findViewById(R.id.imgPreview);

    btnCapturePicture = (Button) findViewById(R.id.btnCapturePicture);

    /**
     * Capture image button click event
     * */
    btnCapturePicture.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            // capture picture
            captureImage();
        }
    });


 // Checking camera availability
    if (!isDeviceSupportCamera()) {
        Toast.makeText(getApplicationContext(),
                "Sorry! Your device doesn't support camera",
                Toast.LENGTH_LONG).show();
        // will close the app if the device does't have camera
        finish();
    }
}
/**
 * Checking device has camera hardware or not
 * */
private boolean isDeviceSupportCamera() {
    if (getApplicationContext().getPackageManager().hasSystemFeature(
            PackageManager.FEATURE_CAMERA)) {
        // this device has a camera
        return true;
    } else {
        // no camera on this device
        return false;
    }
}

        private void captureImage() {
            Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);

            fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);

            intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);

       // start the image capture Intent
            startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
        }
            /**
             * Here we store the file url as it will be null after returning from camera
             * app
             */
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);

        // save file url in bundle as it will be null on scren orientation
        // changes
        outState.putParcelable("file_uri", fileUri);
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        // get the file url
        fileUri = savedInstanceState.getParcelable("file_uri");
    }
/**
 * Receiving activity result method will be called after closing the camera
 * */
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // if the result is capturing Image
    if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) {
        if (resultCode == RESULT_OK) {
            // successfully captured the image
            // display it in image view
            previewCapturedImage();
        } else if (resultCode == RESULT_CANCELED) {
            // user cancelled Image capture
            Toast.makeText(getApplicationContext(),
                    "User cancelled image capture", Toast.LENGTH_SHORT)
                    .show();
        } else {
            // failed to capture image
            Toast.makeText(getApplicationContext(),
                    "Sorry! Failed to capture image", Toast.LENGTH_SHORT)
                    .show();
        }
    }
}

/**
 * Display image from a path to ImageView
 */
private void previewCapturedImage() {
    try {


        imgPreview.setVisibility(View.VISIBLE);

        // bimatp factory
        BitmapFactory.Options options = new BitmapFactory.Options();

        // downsizing image as it throws OutOfMemory Exception for larger
        // images
        options.inSampleSize = 8;

        final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(),
                options);

        imgPreview.setImageBitmap(bitmap);
    } catch (NullPointerException e) {
        e.printStackTrace();
    }
}
/**
 * ------------ Helper Methods ----------------------
  * */

   /**
 * Creating file uri to store image/video
 */
public Uri getOutputMediaFileUri(int type) {
    return Uri.fromFile(getOutputMediaFile(type));
}

/**
 * returning image / video
 */
private static File getOutputMediaFile(int type) {

    // External sdcard location
    File mediaStorageDir = new File(
            Environment
                    .getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES),
            IMAGE_DIRECTORY_NAME);

    // Create the storage directory if it does not exist
    if (!mediaStorageDir.exists()) {
        if (!mediaStorageDir.mkdirs()) {
            Log.d(IMAGE_DIRECTORY_NAME, "Oops! Failed create "
                    + IMAGE_DIRECTORY_NAME + " directory");
            return null;
        }
    }

    // Create a media file name
    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss",
            Locale.getDefault()).format(new Date());
    File mediaFile;
    if (type == MEDIA_TYPE_IMAGE) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "IMG_" + timeStamp + ".jpg");
    } else if (type == MEDIA_TYPE_VIDEO) {
        mediaFile = new File(mediaStorageDir.getPath() + File.separator
                + "VID_" + timeStamp + ".mp4");
    } else {
        return null;
    }

    return mediaFile;
}
}

Ваши предложения приветствуются. Спасибо.