Question

我在我的应用程序中使用了两个回收站视图，一个回收站视图中有直接进入列表的列表，另一个回收站具有firebase数据库。当我运行我的应用程序时，第一个回收站视图正在工作，但第二个回收站视图未显示，但在日志中它已从Firebase正确检索了数据，请帮助我向回收站视图显示数据。

activity_main.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:background="#f2f2f2">


    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/recyclerView"
        android:orientation="horizontal"/>


    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/recyclerView"
        android:id="@+id/recyclerMenuView"
        android:orientation="vertical"/>

</RelativeLayout>

Mainactivity.java-Firebase Recycler Viw是menu（）和getmenu（）

package com.example.myapplication;

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import com.google.firebase.FirebaseApp;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.ValueEventListener;

import java.util.ArrayList;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

public class MainActivity extends AppCompatActivity {

    DatabaseReference reference;

    ArrayList<dish> list;



    private static final String TAG = "MainActivity";

    private ArrayList<String> mCategory = new ArrayList<>();

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


    }

    private void getCategory(){
        Log.d(TAG, "Preparing Categories");

        mCategory.add("Vagetables");
        mCategory.add("Indian Bread");
        mCategory.add("Paranthas");
        mCategory.add("Starters");
        mCategory.add("Snacks");
        mCategory.add("Salad");
        mCategory.add("Noodles");
        mCategory.add("Sandwiches");
        mCategory.add("Rice");
        mCategory.add("Soups");
        mCategory.add("Beverages");
        mCategory.add("Yoghurt");
        mCategory.add("Papad");

        initRecyclerView();
    }

    private void initRecyclerView(){
        Log.d(TAG, "init RecyclerView");
        LinearLayoutManager layoutManager = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL, false);
        RecyclerView recyclerView = findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(layoutManager);
        RecyclerViewAdapter adapter = new RecyclerViewAdapter(this, mCategory);
        recyclerView.setAdapter(adapter);

    }



  private void menu(){
      list = new ArrayList<dish>();
      Log.d(TAG, "recycler MenuView : Firebase Initialized");

      FirebaseApp.initializeApp(this);
      reference = FirebaseDatabase.getInstance().getReference().child("dishes");
      reference.addValueEventListener(new ValueEventListener() {
          @Override
          public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
              Log.d(TAG, "onDataChange : called");
              for (DataSnapshot dataSnapshot1: dataSnapshot.getChildren())
              {
                  Log.d(TAG,"Adding Menu");
                  dish p = dataSnapshot1.getValue(dish.class);
                  Log.d(TAG, "called : " + p);
                  Log.d(TAG, " : " + dataSnapshot + " : " + dataSnapshot1);
                  list.add(p);
              }

          }

          @Override
          public void onCancelled(@NonNull DatabaseError databaseError) {
              Toast.makeText(MainActivity.this, " Opps....Somethinf Went wrong!", Toast.LENGTH_LONG).show();
          }
      });

      getmenu();
  }

    private void getmenu(){
        Log.d(TAG,"Setting adapter");
        LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this, RecyclerView.VERTICAL, false);
        RecyclerView recyclerMenuView = findViewById(R.id.recyclerMenuView);
        recyclerMenuView.setLayoutManager(linearLayoutManager);


        MenuAdapter adapter = new MenuAdapter(MainActivity.this, list);

        recyclerMenuView.setAdapter(adapter);

    }


}

Connection attempt already in progress
V/FA: Activity resumed, time: 1123403393
V/FA: Session started, time: 1123403991
D/FA: Setting user property (FE): _sid, 1562093111
V/FA: Connection attempt already in progress
D/FA: Logging event (FE): session_start(_s), Bundle[{firebase_event_origin(_o)=auto, firebase_screen_class(_sc)=MainActivity, firebase_screen_id(_si)=-756514691701175737, session_id(_sid)=1562093111}]
V/FA: Connection attempt already in progress
D/FA: Connected to remote service
V/FA: Processing queued up service tasks: 6
E/FirebaseInstanceId: Failed to resolve target intent service, skipping classname enforcement
E/FirebaseInstanceId: Error while delivering the message: ServiceIntent not found.
V/BoostFramework: BoostFramework() : mPerf = com.qualcomm.qti.Performance@8162696
D/MainActivity: onDataChange : called
D/MainActivity: Adding Menu
D/MainActivity: called : com.example.myapplication.dish@f142604
D/MainActivity:  : DataSnapshot { key = dishes, value = {chilipaneer={dishImage=https://github.com/cb2609/Credit-Management-App/blob/master/food/chilli_paneer.jpg, permission=true, dishname=Chili Paneer, dishrate=Rs.170}, paneertikka={dishImage=https://github.com/cb2609/Credit-Management-App/blob/master/food/paneer_tikka.jpg, permission=true, dishname=Paneer Tikka, dishrate=Rs.150}} } : DataSnapshot { key = chilipaneer, value = {dishImage=https://github.com/cb2609/Credit-Management-App/blob/master/food/chilli_paneer.jpg, permission=true, dishname=Chili Paneer, dishrate=Rs.170} }
D/MainActivity: Adding Menu
D/MainActivity: called : com.example.myapplication.dish@a4197ed
     : DataSnapshot { key = dishes, value = {chilipaneer={dishImage=https://github.com/cb2609/Credit-Management-App/blob/master/food/chilli_paneer.jpg, permission=true, dishname=Chili Paneer, dishrate=Rs.170}, paneertikka={dishImage=https://github.com/cb2609/Credit-Management-App/blob/master/food/paneer_tikka.jpg, permission=true, dishname=Paneer Tikka, dishrate=Rs.150}} } : DataSnapshot { key = paneertikka, value = {dishImage=https://github.com/cb2609/Credit-Management-App/blob/master/food/paneer_tikka.jpg, permission=true, dishname=Paneer Tikka, dishrate=Rs.150} }
V/FA: Inactivity, disconnecting from the service```

我的回收者视图未显示列表项，但在我的日志中可见

0 个答案: