小编Muf*_*fad的帖子

我正在尝试更改我的firebase实时数据库规则,以便我可以从经过身份验证和未经身份验证的用户访问它,我将其更改为

{
  "rules": {
    ".read": "auth == null",
    ".write": "auth != null" ||"auth==null"
  }
}

但是或者运营商||没有工作.我该怎么办？

谢谢!

我正在使用FirebaseRecyclerAdapter填充RecyclerViewa Fragment.

这是我的代码

mDatabase = FirebaseDatabase.getInstance().getReference();
myAdapter = new FirebaseRecyclerAdapter<Product, ProductViewHolder>(Product.class,
        R.layout.product_item,ProductViewHolder.class,
        mDatabase.child("clothes")) {
    @Override
    protected void populateViewHolder(ProductViewHolder viewHolder, Product model, int position) {
        mProgressBar.setVisibility(ProgressBar.INVISIBLE);
        viewHolder.name.setText(model.name);
        viewHolder.price.setText(model.price);
        Glide.with(getActivity()).load(model.imageUri).into(viewHolder.thumbnail);
        Log.d("NAME", model.name);
    }
};

recyclerView.setAdapter(myAdapter);

问题是,ProgressBar在第一次启动时保持移动,它永远不会隐藏,RecyclerView从不显示自己,但如果我退出应用程序并再次启动,RecyclerView则正确填充,即使屏幕锁定本身并且我解锁它,RecyclerView也会填充.我糊涂了.

我已经解析了一些XML数据Asynctask并将其打印在日志中,但每当我尝试将ArrayList数据复制到我的Activity中时,它总是保持为空.

这是代码,

public class MainActivity extends AppCompatActivity {

   static ArrayList<NewsItems>myData=new ArrayList<>();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ReadRss readRss = new ReadRss(this);
        readRss.execute();
       Log.d("TAG", String.valueOf(myData.size()));//This stays empty
    }


    public static void getData(ArrayList<NewsItems>items){
        for (int i=0; i<items.size(); i++){
            myData.add(items.get(i));
        }
    }
    class ReadRss extends AsyncTask<Void, Void, Void>{

         ArrayList<NewsItems>feedItems = new ArrayList<>();
        Context context;
        String address = "http://www.thedailystar.net/frontpage/rss.xml";
        ProgressDialog progressDialog;
        URL url;

        public ReadRss(Context context) {
            this.context = context;
            progressDialog = new ProgressDialog(context);
            progressDialog.setMessage("Loading..."); …