登录Firebase应用程序时在用户之外获取数据

Question

当用户登录时，我该如何fetch从用户外部获取数据？

我以用户身份登录时无法获取数据。 。 帮助任何人？检查图像。谢谢 希望你们能提供帮助。我使用mref进行了调用，但是我无法将数据从外部获取，我认为他正在查看登录数据的用户。但是数据在外面。谢谢你希望你们能帮助我

 protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_admin);
    //drawer for menu
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer);
    mToggle = new ActionBarDrawerToggle(this, mDrawerLayout, R.string.open, R.string.close);
    mDrawerLayout.addDrawerListener(mToggle);
    mToggle.syncState();
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    NavigationView navigationView =(NavigationView)findViewById(R.id.navigation_view);
    navigationView.setNavigationItemSelectedListener(this);
    ActionBar actionBar = getSupportActionBar();
    //Set title
    actionBar.setTitle("BFP Announcements");
    mSharedPref = getSharedPreferences("SortSettings", MODE_PRIVATE);
    String mSorting = mSharedPref.getString("Sort", "newest"); //where if no settings is selected newest will be default
    //since default value is newest , the newest will be displayed
    if (mSorting.equals("newest")){
        mLayoutManager = new LinearLayoutManager(this);
        //this will load the items from bottom means newest first
        mLayoutManager.setReverseLayout(true);
        mLayoutManager.setStackFromEnd(true);
    }
    else if (mSorting.equals("oldest")){
        mLayoutManager = new LinearLayoutManager(this);
        //this will load the items from bottom means oldest first
        mLayoutManager.setReverseLayout(false);
        mLayoutManager.setStackFromEnd(false);
    }
    //RecyclerView
    mRecyclerView = findViewById(R.id.recyclerView);
    mRecyclerView.setHasFixedSize(true);
    //set Layout as Linear
    mRecyclerView.setLayoutManager(mLayoutManager);

    //send Query to firebasedatabase
    mFirebaseDatabase = FirebaseDatabase.getInstance();
    mRef = mFirebaseDatabase.getReference("Data");
}
//search data
private void firebaseSearch(String searchText){
    //convert string entered in searchview to lowercase
    String query = searchText.toLowerCase();
    Query firebaseSearchQuery = mRef.orderByChild("search").startAt(query).endAt(query + "\uf8ff");

    FirebaseRecyclerAdapter<Model, ViewHolder> firebaseRecyclerAdapter =
            new FirebaseRecyclerAdapter<Model, ViewHolder>(
                    Model.class,
                    R.layout.row,
                    ViewHolder.class,
                    firebaseSearchQuery
            ) {
                @Override
                protected void populateViewHolder(ViewHolder viewHolder, Model model, int position) {
                    viewHolder.setDetails(getApplicationContext(), model.getTitle(), model.getDescription(), model.getImage());
                }
                @Override
                public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                    ViewHolder viewHolder = super.onCreateViewHolder(parent, viewType);
                    viewHolder.setOnClickListener(new ViewHolder.ClickListener() {
                        @Override
                        public void onItemClick(View view, int position) {
                            //Views
                            TextView mTitleTv = view.findViewById(R.id.rTitleTv);
                            TextView mDescTv = view.findViewById(R.id.rDescriptionTv);
                            ImageView mImageView = view.findViewById(R.id.rImageView);
                            //get data from views
                            String mTitle = mTitleTv.getText().toString();
                            String mDesc = mDescTv.getText().toString();
                            Drawable mDrawable = mImageView.getDrawable();
                            Bitmap mBitmap = ((BitmapDrawable)mDrawable).getBitmap();
                            //pass this data to new activity
                            Intent intent = new Intent(view.getContext(), PostDetailActivity.class);
                            ByteArrayOutputStream stream = new ByteArrayOutputStream();
                            mBitmap.compress(Bitmap.CompressFormat.PNG, 100,stream);
                            byte[] bytes = stream.toByteArray();
                            intent.putExtra("image", bytes); //put bitmap image as array
                            intent.putExtra("title", mTitle); //put title
                            intent.putExtra("description", mDesc); //put description
                            startActivity(intent); //start activity
                        }
                        @Override
                        public void onItemlongClick(View view, int position) {
                            //TODO do your own implementation on long item click
                        }
                    });
                    return viewHolder;
                }
            };
    //set adapter to recyclerView
    mRecyclerView.setAdapter(firebaseRecyclerAdapter);
}