android - 如何从 Firebase 检索所有数据并将其放在 RecyclerView 上

Question

这是我的数据库结构

我想从子 Passenger 中检索所有数据并将其放入 RecyclerView 中......这怎么可能？

Answer 1

您可以使用 FirebaseUI for Android图书馆。

只需添加依赖项(0.5.3 适用于 firebase 9.4.0 库):

dependencies {
    // Single target that includes all FirebaseUI libraries
    compile 'com.firebaseui:firebase-ui:0.5.3'
}

定义您的DatabaseReference:

FirebaseDatabase database = FirebaseDatabase.getInstance();
DatabaseReference ref = database.getReference("passengers");

然后:

• 创建自定义 ViewHolder 类
• 创建自定义子类 FirebaseRecyclerAdapter

ViewHolder 类:

public static class PassengerHolder extends RecyclerView.ViewHolder {

}

FirebaseRecyclerAdapter 类:

RecyclerView recycler = (RecyclerView) findViewById(R.id.messages_recycler);
recycler.setHasFixedSize(true);
recycler.setLayoutManager(new LinearLayoutManager(this));

mAdapter = new FirebaseRecyclerAdapter<Passenger, PassengerHolder>(Passenger.class, R.layout.mylayout, PassengerHolder.class, mRef) {
    @Override
    public void populateViewHolder(PassengerHolder passengerViewHolder, Passenger passenger, int position) {
        passengerViewHolder.setName(passenger.getName());
        //.......

    }
};
recycler.setAdapter(mAdapter);