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问尝试使用MultiViews实现水平Firebase RecyclerView
EN

Stack Overflow用户

提问于 2019-08-04 08:28:58

回答 2查看 256关注 0票数 0

我正在尝试一个FireBase水平RecyclerView (类似于Netflix的克隆)。

我看过Git和Android阿森纳，找到了类似的编程，但没有成功地找到任何有firebase后端的东西。我使用过适配器和数据库。我已经在这个问题上工作了几天，但没有找到解决方案。

public class RestaurantList extends AppCompatActivity {

    RecyclerView recyclerView1;
    RecyclerView recyclerView2;


    FirebaseRecyclerOptions<Restaurant> options = new FirebaseRecyclerOptions.Builder<Restaurant>()
            .setQuery(FirebaseDatabase.getInstance()
                            .getReference()
                            .child("Restaurants1")
                    ,Restaurant.class)
            .build();

    FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder> adapter = new FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder>(options) {

        @NonNull
        @Override
        public RestaurantViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View itemView = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.restaurant_item, parent, false);
            return new  RestaurantViewHolder(itemView);
        }

        @Override
        protected void onBindViewHolder(@NonNull  RestaurantViewHolder viewHolder, int position, @NonNull Restaurant model) {

            viewHolder.txt_restaurant_name.setText(model.getName());
            Picasso.get().load(model.getImage())
                    .into(viewHolder.img_restaurant);
            final Restaurant clickItem = model;
            viewHolder.setItemClickListener(new ItemClickListener() {
                @Override
                public void onClick(View view, int position, boolean isLongClick) {
                    Intent foodList = new Intent(RestaurantList.this, Home.class);
                    Common.restaurantSelected=adapter.getRef(position).getKey();
                    startActivity(foodList);
                }
            });

        }

    };

    FirebaseRecyclerOptions<Restaurant> options2 = new FirebaseRecyclerOptions.Builder<Restaurant>()
            .setQuery(FirebaseDatabase.getInstance()
                            .getReference()
                            .child("Restaurants2")
                    ,Restaurant.class)
            .build();

    FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder> adapter2= new FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder>(options2) {


        @NonNull
        @Override
        public RestaurantViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
            View itemView = LayoutInflater.from(parent.getContext())
                    .inflate(R.layout.restaurant_item, parent, false);
            return new  RestaurantViewHolder(itemView);
        }

        @Override
        protected void onBindViewHolder(@NonNull  RestaurantViewHolder viewHolder, int position, @NonNull Restaurant model) {

            viewHolder.txt_restaurant_name.setText(model.getName());
            Picasso.get().load(model.getImage())
                    .into(viewHolder.img_restaurant);
            final Restaurant clickItem = model;
            viewHolder.setItemClickListener(new ItemClickListener() {
                @Override
                public void onClick(View view, int position, boolean isLongClick) {
                    Intent foodList = new Intent(RestaurantList.this, Home.class);
                    Common.restaurantSelected=adapter2.getRef(position).getKey();
                    startActivity(foodList);
                }
            });

        }


    };

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


        RelativeLayout relativeLayout = findViewById(R.id.root2_layout);
        AnimationDrawable animationDrawable = (AnimationDrawable)relativeLayout.getBackground();
        animationDrawable.setEnterFadeDuration(5);
        animationDrawable.setExitFadeDuration(1000);
        animationDrawable.start();

        LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);
        LinearLayoutManager layoutManager2 = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);

        recyclerView1 = (RecyclerView) findViewById(R.id.recycler_restaurant);

        recyclerView1.setLayoutManager(layoutManager);

        recyclerView2 = (RecyclerView) findViewById(R.id.recycler_restaurant2);
        recyclerView1.setLayoutManager(layoutManager2);

        loadAsianFood();
        loadSteakHouse();

    }

    private void loadSteakHouse() {
        adapter.startListening();
        recyclerView1.setAdapter(adapter);
        recyclerView1.getAdapter().notifyDataSetChanged();
        recyclerView1.scheduleLayoutAnimation();
    }

    private void loadAsianFood() {
        adapter2.startListening(); // Did you mean adapter2.startListening()?
        recyclerView2.setAdapter(adapter2);
        recyclerView2.getAdapter().notifyDataSetChanged();
        recyclerView2.scheduleLayoutAnimation();
    }

    @Override
    protected void onStop() {
        super.onStop();
        adapter.stopListening();
        adapter2.stopListening();;

    }
    @Override
    protected void onResume() {
        super.onResume();

        if (adapter != null)
            adapter.startListening();
        adapter2.startListening();

    }



}

它只运行第一个类别(Restaurant1)。

android

firebase

horizontal-scrolling

回答 2

Stack Overflow用户

发布于 2019-08-05 10:19:49

我注意到了一些问题，尽管我不知道它们是否能解决你的实际问题。

1-您正在第一个适配器上调用startListening，而它应该是第二个适配器：

private void loadAsianFood() {
    adapter.startListening(); // Did you mean adapter2.startListening()?
    recyclerView2.setAdapter(adapter2);
    recyclerView2.getAdapter().notifyDataSetChanged();
    recyclerView2.scheduleLayoutAnimation();

}

2-您只停止第一个适配器，而不停止第二个适配器。

@Override
protected void onStop() {
    super.onStop();
    adapter.stopListening();

}

3-您只恢复第一个适配器，而不是第二个适配器：

@Override
protected void onResume() {
    super.onResume();

    if (adapter != null)
        adapter.startListening();
}

票数 0

Stack Overflow用户

发布于 2019-08-05 23:55:38

RecyclerView recyclerView1；RecyclerView recyclerView2；

FirebaseRecyclerOptions<Restaurant> options = new FirebaseRecyclerOptions.Builder<Restaurant>()
        .setQuery(FirebaseDatabase.getInstance()
                        .getReference("RestaurantCategory")
                        .child("01").child("SteakHouse")
                ,Restaurant.class)
        .build();

FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder> adapter = new FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder>(options) {

    @NonNull
    @Override
    public RestaurantViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.restaurant_item, parent, false);
        return new  RestaurantViewHolder(itemView);
    }

    @Override
    protected void onBindViewHolder(@NonNull  RestaurantViewHolder viewHolder, int position, @NonNull Restaurant model) {

        viewHolder.txt_restaurant_name.setText(model.getName());
        Picasso.get().load(model.getImage())
                .into(viewHolder.img_restaurant);
        final Restaurant clickItem = model;
        viewHolder.setItemClickListener(new ItemClickListener() {
            @Override
            public void onClick(View view, int position, boolean isLongClick) {
                Intent foodList = new Intent(RestaurantList.this, Home.class);
                Common.restaurantSelected=adapter.getRef(position).getKey();
                startActivity(foodList);
            }
        });

    }

};

FirebaseRecyclerOptions<Restaurant> options2 = new FirebaseRecyclerOptions.Builder<Restaurant>()
        .setQuery(FirebaseDatabase.getInstance()
                        .getReference("RestaurantCategory")
                        .child("02").child("AsianFood")
                ,Restaurant.class)
        .build();

FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder> adapter2= new FirebaseRecyclerAdapter<Restaurant, RestaurantViewHolder>(options2) {


    @NonNull
    @Override
    public RestaurantViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.restaurant_item, parent, false);
        return new  RestaurantViewHolder(itemView);
    }

    @Override
    protected void onBindViewHolder(@NonNull  RestaurantViewHolder viewHolder, int position, @NonNull Restaurant model) {

        viewHolder.txt_restaurant_name.setText(model.getName());
        Picasso.get().load(model.getImage())
                .into(viewHolder.img_restaurant);
        final Restaurant clickItem = model;
        viewHolder.setItemClickListener(new ItemClickListener() {
            @Override
            public void onClick(View view, int position, boolean isLongClick) {
                Intent foodList = new Intent(RestaurantList.this, Home.class);
                Common.restaurantSelected=adapter2.getRef(position).getKey();
                startActivity(foodList);
            }
        });

    }


};

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


    RelativeLayout relativeLayout = findViewById(R.id.root2_layout);
    AnimationDrawable animationDrawable = (AnimationDrawable)relativeLayout.getBackground();
    animationDrawable.setEnterFadeDuration(5);
    animationDrawable.setExitFadeDuration(1000);
    animationDrawable.start();

    LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);
    LinearLayoutManager layoutManager2 = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);

    recyclerView1 = (RecyclerView) findViewById(R.id.recycler_restaurant);

    recyclerView1.setLayoutManager(layoutManager);

    recyclerView2 = (RecyclerView) findViewById(R.id.recycler_restaurant2);
    recyclerView1.setLayoutManager(layoutManager2);

    loadAsianFood();
    loadSteakHouse();

}

private void loadSteakHouse() {
    adapter.startListening();
    recyclerView1.setAdapter(adapter);
    recyclerView1.getAdapter().notifyDataSetChanged();
    recyclerView1.scheduleLayoutAnimation();
}

private void loadAsianFood() {
    adapter2.startListening(); // Did you mean adapter2.startListening()?
    recyclerView2.setAdapter(adapter2);
    recyclerView2.getAdapter().notifyDataSetChanged();
    recyclerView2.scheduleLayoutAnimation();
}

@Override
protected void onStop() {
    super.onStop();
    adapter.stopListening();
    adapter2.stopListening();;

}
@Override
protected void onResume() {
    super.onResume();

    if (adapter != null)
        adapter.startListening();
    adapter2.startListening();

}

}

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/57342979

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