Permission protect GridOptionsProvider

import android.content.ContentProvider;

import android.content.ContentValues;

import android.content.pm.PackageManager;

import android.content.res.XmlResourceParser;

import android.database.Cursor;

import android.database.MatrixCursor;

import android.graphics.Bitmap;

import android.net.Uri;

import android.os.Binder;

import android.os.Bundle;

import android.os.ParcelFileDescriptor;

import android.os.ParcelFileDescriptor.AutoCloseOutputStream;

    private static final String METHOD_GET_PREVIEW = "get_preview";

    private static final String METADATA_KEY_PREVIEW_VERSION = "preview_version";

    public static final PipeDataWriter<Future<Bitmap>> BITMAP_WRITER =

            new PipeDataWriter<Future<Bitmap>>() {

                @Override

    @Override

    public Bundle call(String method, String arg, Bundle extras) {

        if (getContext().checkPermission("android.permission.BIND_WALLPAPER",

                Binder.getCallingPid(), Binder.getCallingUid())

                != PackageManager.PERMISSION_GRANTED) {

            return null;

        }

        if (!METHOD_GET_PREVIEW.equals(method)) {

            return null;

        }