从 Firebase 检索数据但不显示

Question

这是我的 firebase 数据库，我想从中检索 ListView 中所有大学的名称单击此处查看图片

   myRef= FirebaseDatabase.getInstance().getReference();
   myRef.child("Universities").addValueEventListener(new ValueEventListener() {
        @Override
        public void onDataChange(DataSnapshot dataSnapshot) {

            for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
                database c = postSnapshot.getValue(database.class);
                final String name = c.getuniName();
                userNameList.add(name);

                final ArrayAdapter<String> mutahirAdapter=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1 , userNameList);
                mListView.setAdapter(mutahirAdapter);

            }
        }

        @Override
        public void onCancelled(DatabaseError databaseError) {
        }
    });

数据库Class 我直接在 Firebase 中添加了数据，现在我没有在 ListView 中获取数据 我想检索 ListView[=25= 中所有 child 的大学]

package com.mutahir.futureguide;

public class database {
    String Name;
    public String uniName(String Name) {
        this.Name= Name;
        return Name;
    }

    public String getuniName() {
        return Name;
    }

    public void setuniName(String Name) {
        this.Name = Name;
    }
}

Answer 1

希望有用！

myRef= FirebaseDatabase.getInstance().getReference();
myRef.child("Universities").addValueEventListener(new ValueEventListener() {
    @Override
    public void onDataChange(DataSnapshot dataSnapshot) {

        for (DataSnapshot postSnapshot : dataSnapshot.getChildren()) {
            final String name = postSnapshot.getValue("name").toString();
            userNameList.add(name);
        }
        if(!userNameList.isEmpty()){
            final ArrayAdapter<String> mutahirAdapter=new ArrayAdapter<String>(getApplicationContext(),android.R.layout.simple_list_item_1 , userNameList);
            mListView.setAdapter(mutahirAdapter);
       }

    }

    @Override
    public void onCancelled(DatabaseError databaseError) {
    }
});