如何從火力地堡檢索所有數據，並把它放在一個RecyclerView

Question

，這裏是我的數據庫結構

我想檢索所有從孩子Passenger的DATAS把它放在裏面RecyclerView ...它是如何可能？

Answer 1

您可以使用FirebaseUI for Android庫。

只需添加依賴關係（在0.5.3工程與火力9.4.0庫）：

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

定義DatabaseReference：

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

然後：

• 創建定製ViewHolder類
• Creat EA自定義子類FirebaseRecyclerAdapter

的ViewHolder類：

public static class PassengerHolder extends RecyclerView.ViewHolder { 

} 

的FirebaseRecyclerAdapter類：

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); 

Answer 2

你可以嘗試這樣的：

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

     ref.addListenerForSingleValueEvent(new ValueEventListener() { 
       @Override 
       public void onDataChange(DataSnapshot dataSnapshot) { 
        //Your Logic here 
        for (DataSnapshot eventSnapshot : dataSnapshot.getChildren()) { 
        YourModel mModel = eventSnapshot.getValue(YourModel.class); 
        Log.e("DATA" ,""+ mModel); 
        } 
       } 

       @Override 
       public void onCancelled(DatabaseError databaseError) { 

       } 
      }); 

你必須創建一個ARRA您RecycleviewŸ列表並添加每個模型即mModel您ArrayList和顯示在列表中

More Info 1