RecycleView 中可定制适配器的问题 - Android/Java

Question

我正在使用 TextView、EditText 和 CheckBox 实现一个可定制的适配器。 我设法使所有项目出现在我的reccleview中，但是，当检查复选框时，还检查了下面的另一个复选框，在编辑deDittext上，在更改项目的值时，也会发生同样的复选框。 list 也被相同的值改变。 我不知道如何避免这种情况，因为我执行了看似正确的 viewholder 实现，请按照实现下面的代码：

回收视图：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayoutxmlns: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=".ActivityListaDisciplinaDiario">

<android.support.v7.widget.RecyclerView
    android:id="@+id/lista_bncc"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />


</android.support.constraint.ConstraintLayout>

布局适配器：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:paddingLeft="5dp"
        android:textStyle="bold"
        android:text="Código BNCC:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/txt_bncc"
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="18sp"
        android:paddingLeft="15dp"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:text="TextView" />

</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:paddingLeft="5dp"
        android:textStyle="bold"
        android:text="Descrição:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/txt_descricao_bncc"
        android:layout_gravity="center"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:textSize="18sp"
        android:paddingLeft="15dp"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:text="TextView" />


</LinearLayout>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:paddingTop="5dp"
        android:paddingBottom="5dp"
        android:paddingLeft="5dp"
        android:textStyle="bold"
        android:text="Tempo:"
        android:textSize="18sp" />

    <EditText
        android:id="@+id/timer"
        android:inputType="number"
        android:hint="tempo de aula"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        />

    <LinearLayout
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:gravity="end">

        <CheckBox
            android:layout_gravity="end"
            android:id="@+id/checkbox_bncc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

    </LinearLayout>


</LinearLayout>

活动代码：

lista = response.body();

            Adapter_Lista_Bncc adapter = new Adapter_Lista_Bncc(lista, ActivityListaBNCC.this);

            lista_bncc.setAdapter(adapter);
            RecyclerView.LayoutManager layout = new LinearLayoutManager(ActivityListaBNCC.this, 
            LinearLayoutManager.VERTICAL, false);

            lista_bncc.setLayoutManager(layout);

适配器实现代码：

public class Adapter_Lista_Bncc extends RecyclerView.Adapter {

private List<Pesquisa> lista;

private Context context;

public Adapter_Lista_Bncc(List<Pesquisa> lista, Context context){

    this.lista = lista;
    this.context = context;

}


@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {

    View view = LayoutInflater.from(context).inflate(R.layout.adapter_lista_bncc, viewGroup, false);

    NossoViewHolder holder = new NossoViewHolder(view);


    return holder;
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {

    NossoViewHolder holder = (NossoViewHolder) viewHolder;

    Pesquisa p = lista.get(i);

    holder.txt_bncc.setText(p.getVar1());
    holder.txt_descricao_bncc.setText(p.getVar2());
    holder.timer.setFilters(new InputFilter[]{new MinMaxFilter("1", "60")});

}

@Override
public int getItemCount() {
    return lista.size();
}

public class NossoViewHolder extends RecyclerView.ViewHolder{

    final TextView txt_bncc;
    final TextView txt_descricao_bncc;
    final EditText timer;
    final CheckBox check;

    public NossoViewHolder(View v){
        super(v);

        txt_bncc = (TextView) v.findViewById(R.id.txt_bncc);
        txt_descricao_bncc = (TextView) v.findViewById(R.id.txt_descricao_bncc);
        timer = (EditText) v.findViewById(R.id.timer);
        check = (CheckBox) v.findViewById(R.id.checkbox_bncc);

    }

}
}

我可以提供有关情况的更多信息，感谢您的关注和任何可以提供帮助的人。

Answer 1

好的，首先为了更好的性能迁移到 Androidx 并在点击列表器和适配器上实现，您应该必须实现接口以传递您的 position 以便您可以访问您的活动并更改它们我将纠正您的适配器，如下面的复选框只检查别人

public class Adapter_Lista_Bncc extends RecyclerView.Adapter {

private List<Pesquisa> lista;

private Context context;
// here is our interface 
private OnItemClickListner listner;

public Adapter_Lista_Bncc(List<Pesquisa> lista, Context context){

    this.lista = lista;
    this.context = context;

}


@NonNull
@Override
public RecyclerView.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {

    View view = LayoutInflater.from(context).inflate(R.layout.adapter_lista_bncc, viewGroup, false);

    NossoViewHolder holder = new NossoViewHolder(view);


    return holder;
}

@Override
public void onBindViewHolder(@NonNull RecyclerView.ViewHolder viewHolder, int i) {

    NossoViewHolder holder = (NossoViewHolder) viewHolder;

    Pesquisa p = lista.get(i);

    holder.txt_bncc.setText(p.getVar1());
    holder.txt_descricao_bncc.setText(p.getVar2());
    holder.timer.setFilters(new InputFilter[]{new MinMaxFilter("1", "60")});

}

@Override
public int getItemCount() {
    return lista.size();
}
// implemet on click listner
public class NossoViewHolder extends RecyclerView.ViewHolder implements View.OnClickLisntener{

    final TextView txt_bncc;
    final TextView txt_descricao_bncc;
    final EditText timer;
    final CheckBox check;

    public NossoViewHolder(View v){
        super(v);

        txt_bncc = (TextView) v.findViewById(R.id.txt_bncc);
        txt_descricao_bncc = (TextView) v.findViewById(R.id.txt_descricao_bncc);
        timer = (EditText) v.findViewById(R.id.timer);
        check = (CheckBox) v.findViewById(R.id.checkbox_bncc);
       check.setOnClickListener(this);


    }
@Override
public void onClick(View view)
{
// you should have to pass your position i.e what position what your clicking
int position = getAdapterPosition();
// to avoid erro if recyclerView is empty use rvNo position
if(listner!=null && position!= RecyclerView.No_Position)
{
listner.onClick(lista.get(position),view);
}

}
}

// here is Interface
public interface OnItemClickListner{
void onClick(Pesquisa xyz,View view);
}
public void setOnItemClicklistner(// interface OnItemClickListner lis)
{
this.listner = lis;
}
}

现在在您的活动中调用您的界面

adapter.setOnItemClicklistner(new //your adapter. Onclick Listner) 
{
@override 
public void onClick(...auto generated)
{
// do your stuff using instance of check box
}
}