java—显示多个表中的数据，然后将数据存储在firebase for android的不同表中

f4t66c6m  于 2021-07-13  发布在  Java
关注(0)|答案(0)|浏览(177)

我想参加其中我首先要选择一个从微调器类，然后日期，然后单击添加出勤我应该被导航到下一页，我已经在其他表中存储的所有学生id将显示，并与一个复选框将在那里标记出勤（所以id应直接来自学生详细信息）表），然后当我提交它时，它应该做一个考勤表，其中将有4列（日期和主题从上一页，身份证和出席/缺席从这一页）。
考勤.java：

package com.example.uni_assist;

import androidx.appcompat.app.AppCompatActivity;

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;

import java.util.Calendar;

public class Attendance extends AppCompatActivity {

Spinner spinnersubject;
Button viewattend, addattend;
ImageButton datebutton;
EditText attenddate;

private Calendar cal;
private int day;
private int month;
private int dyear;

public static final String Firebase_Server_URL = "https://uni-assist-44b84-default-rtdb.firebaseio.com/";

String SubjectHolder,AttendDateHolder;

Firebase firebase;
DatabaseReference databaseReference;

public static final String Database_Path = "Attendance";

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

    spinnersubject = findViewById(R.id.spinnersub);
    String[] items = new String[]{"AI", "DSR", "MAD", "TOC", "SDS", ".NET"};
    ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_spinner_dropdown_item, items);
    spinnersubject.setAdapter(adapter);

    datebutton = (ImageButton) findViewById(R.id.DateImageButton);
    cal = Calendar.getInstance();
    day = cal.get(Calendar.DAY_OF_MONTH);
    month = cal.get(Calendar.MONTH);
    dyear = cal.get(Calendar.YEAR);
    attenddate = (EditText) findViewById(R.id.DateEditText);
    datebutton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            showDialog(0);

        }
    });

    Firebase.setAndroidContext(Attendance.this);

    firebase = new Firebase(Firebase_Server_URL);

    databaseReference = FirebaseDatabase.getInstance().getReference(Database_Path);

    addattend = (Button) findViewById(R.id.buttonadd);

    spinnersubject = (Spinner) findViewById(R.id.spinnersub);

    addattend.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Intent intent = new Intent(Attendance.this, AddAttendance.class);
            startActivity(intent);
        }
    });

}
@Override
@Deprecated
protected Dialog onCreateDialog(int id) {
    return new DatePickerDialog(this, datePickerListener, dyear, month, day);
}
private DatePickerDialog.OnDateSetListener datePickerListener = new DatePickerDialog.OnDateSetListener() {
    public void onDateSet(DatePicker view, int selectedYear,
                          int selectedMonth, int selectedDay) {
        attenddate.setText(selectedDay + " / " + (selectedMonth + 1) + " / "
                + selectedYear);
    }
};

}`
活动\ u attention.xml：

xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".HomepageS">

<Button
    android:id="@+id/buttonview"
    android:layout_width="320dp"
    android:layout_height="63dp"
    android:text="View Attendance"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.494"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.976" />

<TextView
    android:id="@+id/textView59"
    android:layout_width="116dp"
    android:layout_height="42dp"
    android:text="Select Subject"
    android:gravity="center"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.207"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.162" />

<Spinner
    android:id="@+id/spinnersub"
    android:layout_width="130dp"
    android:layout_height="46dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.84"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.16" />

<ImageButton
    android:id="@+id/DateImageButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"

    android:cropToPadding="true"
    android:src="@drawable/calendar_icon"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.699"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.311" />

<EditText
    android:id="@+id/DateEditText"
    android:layout_width="138dp"
    android:layout_height="44dp"
    android:hint="Enter date"
    android:gravity="center"
    android:background="#ffffff"
    android:editable="false"
    android:ems="10"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.175"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.322"/>

<Button
    android:id="@+id/buttonadd"
    android:layout_width="320dp"
    android:layout_height="63dp"
    android:text="Add Attendance"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.527"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.459" />
</androidx.constraintlayout.widget.ConstraintLayout>

addAttention.java地址：

package com.example.uni_assist;
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
public class AddAttendance extends AppCompatActivity {

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

活动\添加\出勤.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".AddAttendance">

<TextView
    android:id="@+id/textView60"
    android:layout_width="148dp"
    android:layout_height="44dp"
    android:text="Add Attendance"
    android:gravity="center"
    android:textSize="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.071" />

<Button
    android:id="@+id/buttonaddattend"
    android:layout_width="173dp"
    android:layout_height="43dp"
    android:text="Save Attendance"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.526"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.963" />

<androidx.recyclerview.widget.RecyclerView
    android:layout_width="373dp"
    android:layout_height="480dp"
    app:layout_constraintBottom_toBottomOf="@+id/buttonaddattend"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.553" />
 </androidx.constraintlayout.widget.ConstraintLayout>`

attendancedetails.java:（getter和setter文件）

<TextView
    android:id="@+id/textView60"
    android:layout_width="148dp"
    android:layout_height="44dp"
    android:text="Add Attendance"
    android:gravity="center"
    android:textSize="20dp"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.071" />

<Button
    android:id="@+id/buttonaddattend"
    android:layout_width="173dp"
    android:layout_height="43dp"
    android:text="Save Attendance"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.526"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.963" />

<androidx.recyclerview.widget.RecyclerView
    android:layout_width="373dp"
    android:layout_height="480dp"
    app:layout_constraintBottom_toBottomOf="@+id/buttonaddattend"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintVertical_bias="0.553" />
</androidx.constraintlayout.widget.ConstraintLayout> `

recycleradapterview2.java文件：

package com.example.uni_assist;

public class RecyclerViewAdapter2 extends RecyclerView.Adapter<RecyclerViewAdapter2.ViewHolder> {

Context context;
List<Attendancedetails> MainImageUploadInfoList;

public RecyclerViewAdapter2(Context context, List<Attendancedetails> TempList) {

    this.MainImageUploadInfoList = TempList;

    this.context = context;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_items2, parent, false);

    ViewHolder viewHolder = new ViewHolder(view);

    return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {

    Attendancedetails attendance = MainImageUploadInfoList.get(position);

    holder.StudentIdTextView.setText(attendance.getAttendId());
    holder.StudentAttend.setText(attendance.getAttendPresent());

}

@Override
public int getItemCount() {

    return MainImageUploadInfoList.size();
}

class ViewHolder extends RecyclerView.ViewHolder {

    public TextView StudentIdTextView;
    public CheckBox StudentAttend;

    public ViewHolder(View itemView) {

        super(itemView);

        StudentIdTextView = (TextView) itemView.findViewById(R.id.ShowStudentIdTextView1);
        StudentAttend = (CheckBox) itemView.findViewById(R.id.checkBox);

    }

 }
 }

活动\u recycler \u items2.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="@+id/cardview1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
card_view:cardElevation="5dp"
card_view:contentPadding="5dp"
card_view:cardCornerRadius="5dp"
card_view:cardMaxElevation="5dp"
>

<RelativeLayout
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:background="#ECEFF1"
    android:padding="10dp">

    <TextView
        android:id="@+id/StudentId"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="Student Id: "
        android:textColor="#000"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/ShowStudentIdTextView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_marginStart="61dp"
        android:layout_marginLeft="61dp"
        android:layout_marginTop="3dp"
        android:layout_toEndOf="@+id/StudentId"
        android:layout_toRightOf="@+id/StudentId"
        android:gravity="center"
        android:text="Show Student Id"
        android:textColor="#000"
        android:textSize="20dp" />

    <TextView
        android:id="@+id/AttendPresent"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/StudentEmail"
        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_marginStart="6dp"
        android:layout_marginLeft="6dp"
        android:layout_marginTop="30dp"
        android:gravity="center"
        android:text="Attendance"
        android:textColor="#000"
        android:textSize="20dp" />

    <CheckBox
        android:id="@+id/checkBox"
        android:layout_width="wrap_content"
        android:layout_height="35dp"
        android:layout_below="@+id/ShowStudentIdTextView1"
        android:layout_marginStart="85dp"
        android:layout_marginLeft="85dp"
        android:layout_marginTop="-2dp"
        android:layout_toEndOf="@+id/AttendPresent"
        android:layout_toRightOf="@+id/AttendPresent"
        android:gravity="center"
        android:text="Present" />

  </RelativeLayout>

   </androidx.cardview.widget.CardView>`

所以，我不知道如何从学生详细信息表和显示在添加考勤页，然后从那里我必须采取的复选框和存储在考勤表的输入值。
在此处输入图像描述

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