英文:
Showing xml for correct view
问题
以下是你提供的代码部分的翻译:
ViewStudents.java
// 这部分代码没有需要翻译的内容,已包含在问题描述中。
RecyclerAdapter.java
// 这部分代码没有需要翻译的内容,已包含在问题描述中。
activity_view_students.xml
<!-- 这部分代码没有需要翻译的内容,已包含在问题描述中。 -->
daily_grading.xml
<!-- 这部分代码没有需要翻译的内容,已包含在问题描述中。 -->
activity_student_item.xml
<!-- 这部分代码没有需要翻译的内容,已包含在问题描述中。 -->
GradingRecyclerAdapter
// 这部分代码没有需要翻译的内容,已包含在问题描述中。
activity_grading_student_item.xml
<!-- 这部分代码没有需要翻译的内容,已包含在问题描述中。 -->
请注意,这是你提供的代码部分的翻译。如果你有其他问题或需要进一步帮助,请随时提问。
英文:
When a user logs in to my app, they can either click the view students button or daily grading button. The view students will display a student's image and their name. The daily grading will display the student's image, name, and two checkboxes that says pass or fail. Now the issue I have is that the checkboxes for pass and fail are showing up in my activity_view_students.xml view when it should not be. It should only show when a user clicks daily grading. I will put images below to make it clearer
What it looks like in the activity_view_students.xml
What it should look like in activity_view_students.xml
I will paste all relevant code below.
ViewStudents.java
package com.example.studenttracker;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.recyclerview.widget.GridLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import com.google.firebase.database.DataSnapshot;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
import com.google.firebase.database.Query;
import com.google.firebase.database.ValueEventListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
public class ViewStudents extends AppCompatActivity {
    RecyclerView recyclerView;
    Button addStudent;
    private DatabaseReference myRef;
    public ArrayList<Students> students;
    private RecyclerAdapter recyclerAdapter;
    private Button orderStudents;
    private EditText mEditTextAge;
    private EditText mEditTextAssignment;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_view_students);
        recyclerView = findViewById(R.id.recyclerView);
        addStudent = findViewById(R.id.addStudentButton);
        mEditTextAge = findViewById(R.id.EditTextAge);
        mEditTextAssignment = findViewById(R.id.EditTextAssignment);
        orderStudents = findViewById(R.id.orderStudents);
        addStudent.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(new Intent(ViewStudents.this, AddStudent.class));
            }
        });
        recyclerView.setLayoutManager(new GridLayoutManager(this, 2));
        recyclerView.setHasFixedSize(true);
        myRef = FirebaseDatabase.getInstance().getReference();
        students = new ArrayList<>();
        ClearAll();
        GetDataFromFirebase();
    }
    private void GetDataFromFirebase() {
        Query query = myRef.child("student");
        query.addValueEventListener(new ValueEventListener() {
            @Override
            public void onDataChange(@NonNull DataSnapshot dataSnapshot) {
                ClearAll();
                for(DataSnapshot snapshot: dataSnapshot.getChildren()) {
                    Students student = new Students();
                    if (snapshot.child("url").getValue() == null) {
                        student.setImageUrl(snapshot.child("imageUrl").getValue().toString());
                    }
                    else {
                        student.setImageUrl(snapshot.child("url").getValue().toString());
                    }
//                    student.setAge(mEditTextAge.getText().toString());
//                    student.setAssignment(mEditTextAssignment.getText().toString().trim());
                    student.setName(snapshot.child("name").getValue().toString());
                    students.add(student);
                }
                recyclerAdapter = new RecyclerAdapter(getApplicationContext(), students);
                recyclerView.setAdapter(recyclerAdapter);
                recyclerAdapter.notifyDataSetChanged();
            }
            @Override
            public void onCancelled(@NonNull DatabaseError databaseError) {
            }
        });
    }
    private void ClearAll() {
        if (students != null) {
            students.clear();
            if(recyclerAdapter != null) {
                recyclerAdapter.notifyDataSetChanged();
            }
        }
        students = new ArrayList<>();
    }
    public void orderStudents(View view) {
        Collections.sort( students, new Comparator<Students>() {
            @Override
            public int compare( Students o1, Students o2 ) {
                return o1.name.compareTo( o2.name );
            }
        });
        recyclerAdapter.notifyDataSetChanged();
    }
}
RecyclerAdapter.java
package com.example.studenttracker;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import java.util.ArrayList;
public class RecyclerAdapter extends RecyclerView.Adapter<RecyclerAdapter.ViewHolder> {
    private OnItemClickListener mListener;
    public interface OnItemClickListener {
        void onItemClick(int position);
    }
    public void setOnItemClickListener(OnItemClickListener listener) {
        mListener = listener;
    }
    private static final String Tag = "RecyclerView";
    private Context mContext;
    private ArrayList<Students> studentsArrayList;
    public RecyclerAdapter(Context mContext, ArrayList<Students> studentsArrayList) {
        this.mContext = mContext;
        this.studentsArrayList = studentsArrayList;
    }
    @NonNull
    @Override
    public RecyclerAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.activity_student_item,parent,false);
        return new ViewHolder(view);
    }
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
//TextView
        holder.textView.setText(studentsArrayList.get(position).getName());
        Glide.with(mContext).load(studentsArrayList.get(position).getImageUrl()).into(holder.imageView);
// if (studentsArrayList.get(position).get) { //check if you need the buttons or not
// holder..setVisibility(View.VISIBLE);
// holder.checkBox2.setVisibility(View.VISIBLE);
// } else {
// holder.checkBox.setVisibility(View.GONE);
// holder.checkBox2.setVisibility(View.GONE);
// }
    }
    @Override
    public int getItemCount() {
        return studentsArrayList.size();
    }
    public class ViewHolder extends RecyclerView.ViewHolder {
        ImageView imageView;
        TextView textView;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            imageView = itemView.findViewById(R.id.imageView);
            textView = itemView.findViewById(R.id.textView);
            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (mListener != null) {
                        int position = getAdapterPosition();
                    }
                }
            });
        }
    }
}
activity_view_students.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=".ViewStudents">
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="409dp"
        android:layout_height="729dp"
        android:layout_marginEnd="1dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" >
    </androidx.recyclerview.widget.RecyclerView>
    <Button
        android:id="@+id/addStudentButton"
        android:layout_width="wrap_content"
        android:layout_height="50dp"
        android:text="Add Students"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
    <Button
        android:id="@+id/orderStudents"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="orderStudents"
        android:text="Order Students"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
daily_grading.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=".DailyGrading">
    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="409dp"
        android:layout_height="729dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
activity_student_item.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="wrap_content"
    tools:context=".DailyGrading">
    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:foreground="?android:attr/selectableItemBackground"
        app:cardElevation="2dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
    </androidx.cardview.widget.CardView>
    <RelativeLayout
        android:id="@+id/relativeLayout2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="5dp"
        tools:layout_editor_absoluteX="0dp"
        tools:layout_editor_absoluteY="52dp">
        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:layout_marginTop="50dp"
            android:paddingTop="20dp"
            android:scaleType="centerCrop" />
        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/imageView"
            android:layout_margin="10dp"
            android:textSize="16sp" />
        <CheckBox
            android:id="@+id/passc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/textView"
            android:text="PASS" />
        <CheckBox
            android:id="@+id/failc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/textView"
            android:layout_toRightOf="@+id/passc"
            android:text="FAIL" />
    </RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
GradingRecyclerAdapter
package com.example.studenttracker;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.view.ViewGroup;
import android.widget.TextView;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.RecyclerView;
import com.bumptech.glide.Glide;
import java.util.ArrayList;
public class GradingRecyclerAdapter extends RecyclerView.Adapter<GradingRecyclerAdapter.ViewHolder> {
    private OnItemClickListener mListener;
    public interface OnItemClickListener {
        void onItemClick(int position);
    }
    public void setOnItemClickListener(OnItemClickListener listener) {
        mListener = listener;
    }
    private static final String Tag = "RecyclerView";
    private Context mContext;
    private ArrayList<Students> studentsArrayList;
    public GradingRecyclerAdapter(Context mContext, ArrayList<Students> studentsArrayList) {
        this.mContext = mContext;
        this.studentsArrayList = studentsArrayList;
    }
    @NonNull
    @Override
    public GradingRecyclerAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.activity_grading_student_item,parent,false);
        return new ViewHolder(view);
    }
    @Override
    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
//TextView
        holder.textView.setText(studentsArrayList.get(position).getName());
        Glide.with(mContext).load(studentsArrayList.get(position).getImageUrl()).into(holder.imageView);
    }
    @Override
    public int getItemCount() {
        return studentsArrayList.size();
    }
    public class ViewHolder extends RecyclerView.ViewHolder {
        ImageView imageView;
        TextView textView;
        Button passButton;
        Button failButton;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            imageView = itemView.findViewById(R.id.imageView);
            textView = itemView.findViewById(R.id.textView);
            passButton = itemView.findViewById(R.id.PASS);
            failButton = itemView.findViewById(R.id.FAIL);
//            passButton.setVisibility(View.GONE);
//            failButton.setVisibility(View.GONE);
            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (mListener != null) {
                        int position = getAdapterPosition();
                    }
                }
            });
        }
    }
}
activity_grading_student_item
<?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="wrap_content"
    tools:context=".DailyGrading">
    <androidx.cardview.widget.CardView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:foreground="?android:attr/selectableItemBackground"
        app:cardElevation="2dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">
    </androidx.cardview.widget.CardView>
    <RelativeLayout
        android:id="@+id/relativeLayout2"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="5dp"
        tools:layout_editor_absoluteX="0dp"
        tools:layout_editor_absoluteY="52dp">
        <ImageView
            android:id="@+id/imageView"
            android:layout_width="match_parent"
            android:layout_height="200dp"
            android:layout_marginTop="50dp"
            android:paddingTop="20dp"
            android:scaleType="centerCrop" />
        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/imageView"
            android:layout_margin="10dp"
            android:textSize="16sp" />
        <CheckBox
            android:id="@+id/PASS"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/textView"
            android:text="PASS" />
        <CheckBox
            android:id="@+id/FAIL"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@id/textView"
            android:layout_toRightOf="@+id/PASS"
            android:text="FAIL" />
    </RelativeLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
答案1
得分: 1
你可以简单地使用不同的适配器,
创建另一个名为 "activity_view_student_item.xml" 的布局文件,并从其中移除复选框。
为该 RecyclerView 创建另一个适配器,然后将以下代码中的:
View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.activity_student_item, parent, false);
在新的适配器中替换为:
View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.activity_view_student_item, parent, false);
然后在 "ViewStudents" 活动中将 RecyclerView 的适配器设置为新的适配器。
英文:
You can simply use different adapters
create another activity_student_item.xml let's say activity_view_student_item.xml and remove the checkboxes from that one
create another adapter for that recyclerView but change
View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.activity_student_item,parent,false);
in the new adapter to
View view = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.activity_view_student_item,parent,false);
and in the ViewStudents activity set the recycler's Adapter to that new adapter
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库,让每个人都能够通过互相帮助和分享经验来进步。




评论