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android - Firebase 读取 getter 设置器

问题描述

我试图从我的 Firebase 实时数据库中获取一些数据，一般如下，但无法弄清楚问题在代码中的哪个位置困扰着我。以下 Toast 语句仅返回名称，但不打印 bmdc！

我无法弄清楚问题出在哪里。代码在这里：

package com.example.abed.smit;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.firebase.ui.database.FirebaseRecyclerAdapter;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;

import org.w3c.dom.Text;

public class  FindDocActivity extends AppCompatActivity {

private ImageView SearchButton_doc;
private EditText SearchInput_doc;

private RecyclerView SearchResult_doc;

private DatabaseReference allDocdatabaseref;

FirebaseRecyclerAdapter<FindDoctors, FindDoctorsViewHolder>  firebaseRecyclerAdapter;

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

    SearchResult_doc = (RecyclerView) findViewById(R.id.search_result_list1);
    SearchResult_doc.setHasFixedSize(true);
    SearchResult_doc.setLayoutManager(new LinearLayoutManager(this));

    SearchButton_doc = (ImageView) findViewById(R.id.search_people_btn1);
    SearchInput_doc = (EditText) findViewById(R.id.Search_box_input1);

    allDocdatabaseref = FirebaseDatabase.getInstance().getReference().child("BMDC");


    SearchButton_doc.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            String searchBoxInput1 = SearchInput_doc.getText().toString().trim();

            SearchDoc(searchBoxInput1);


        }
    });


}

private void SearchDoc(String searchBoxInput1) {
    Toast.makeText(this, "searching..", Toast.LENGTH_LONG).show();

    Query searchdoctorquery = allDocdatabaseref.orderByChild("name").startAt(searchBoxInput1).endAt(searchBoxInput1 + "\uf8ff");


    firebaseRecyclerAdapter
            = new FirebaseRecyclerAdapter<FindDoctors, FindDoctorsViewHolder>(
            FindDoctors.class,
            R.layout.all_userdoc_display_layout,
            FindDoctorsViewHolder.class,
            searchdoctorquery

    ) {
        @Override
        protected void populateViewHolder(FindDoctorsViewHolder viewHolder, FindDoctors model, int position) {
            /// Toast.makeText(getApplicationContext(),model.getName().toString(), Toast.LENGTH_LONG).show();

            viewHolder.setbmdc(model.getbmdc());
            viewHolder.setName(model.getName());
        }
    };
    SearchResult_doc.setAdapter(firebaseRecyclerAdapter);
    firebaseRecyclerAdapter.startListening();
}

public static class FindDoctorsViewHolder extends RecyclerView.ViewHolder {
    View mView;

    public FindDoctorsViewHolder(View itemView) {
        super(itemView);
        mView = itemView;
    }

    public void setbmdc(String bmdc) {

        TextView Docbmdc = mView.findViewById(R.id.all_user_profile_name1);
        Docbmdc.setText(bmdc);
    }

    public void setName(String name) {
        TextView Docname = mView.findViewById(R.id.all_user_profile_status1);
        Docname.setText(name);
    }

}
}

我使用了getter setter：

package com.example.abed.smit;

public class FindDoctors {

public String bmdc , name;

public FindDoctors()
{

}
public FindDoctors(String bmdc, String name) {
    this.bmdc =bmdc;
    this.name = name;
}

public String getbmdc() {
    return bmdc;
}

public void setbmdc(String bmdc) {
    this.bmdc = bmdc;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}
}

结果如下：

这是结果！

数据库

标签： androidfirebasefirebase-realtime-database

解决方案

问题在于bmdc您的模型类中的字段吸气剂不正确。正确的 getter 应该是getBmdc()，而不是 getbmdc()现在在您的代码中。看到大写字母B和小写字母了b吗？正确的模型类应如下所示：

public class FindDoctors {
    private String bmdc, name;

    public FindDoctors() {}

    public FindDoctors(String bmdc, String name) {
        this.bmdc = bmdc;
        this.name = name;
    }

    public String getBmdc() { return bmdc; }

    public String getName() { return name; }
}

setter 不是必需的，始终是可选的，因为如果 JSON 属性没有 setter，Firebase 客户端会将值直接设置到字段上。但是，如果您想使用 setter，则适合您的字段的正确 setter 是：

public void setBmdc(String bmdc) {
    this.bmdc = bmdc;
}

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