Question

public class HomeActivity extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
   Button ten, twelve;
    ten=(Button) findViewById(R.id.tenth) ;
    twelve=(Button) findViewById(R.id.twelth) ;
    ten.setOnClickListener(new View.OnClickListener() {

        DatabaseReference ref = FirebaseDatabase.getInstance().getReference().child("Customer_details");



        @Override
        public void onClick(View v) {

        }
    });

我的班级

package com.example.shikshaMela.sm;

public class course_tenth {

    String name = "";
    String college_list = "";

    String fee = "";
    String duration = "";
    String higher_study = "";
    String job_aspects = "";
    String entrance_exam = "";





public course_tenth() {

}

public course_tenth(String name, String college_list, String fee, String duration, String higher_study, String job_aspects, String entrance_exam)
    {


        this.name = name;
        this.college_list = college_list;

        this.fee = fee;
        this.duration = duration;
        this.higher_study = higher_study;
        this.job_aspects = job_aspects;
        this.entrance_exam = entrance_exam;
    }

public String getname() {
    return name;
}

public String getCollege_list() {
    return college_list;
}



public String getFee() {
    return fee;
}

public String getDuration() {
    return duration;
}

public String getHigher_study() {
    return higher_study;
}

public String getJob_aspects() {
    return job_aspects;
}

public String getEntrance_exam() {
    return entrance_exam;
}

}

} `我想从数据库中获取所有课程列表（如bca），并在其他活动的列表中显示。这些项目（bca）是可点击的，所以当我们点击这些项目（bca）时，它的内部数据（如大学资格等等）将被提取。

我该怎么做？

my firebase database

Answer 1

df[('bar','new')] = df[('bar','one')] * 10

first        bar
second       one       two       new
A       0.386729  1.014010  3.867295
B       0.236824  0.439019  2.368238
C       0.530020 -0.268751  5.300204

}）;

按钮单击时从firebase数据库中检索数据，这些数据以列表格式显示在其他活动中

1 个答案: