Android Studio 将 RecyclerView 中的文本错误设置为 TextView

Question

I have some ArrayLists where Products are inserted and I have the problem, that in itemTextView is set an text, which is not in this ArrayList. What am I doing wrong? Please answer.

我已经尝试解决这个问题大约一个星期了。当我用 itemTexte2.get(i).toString() 制作 Toast 消息 时，它显示赖特文本，但是当我我将它添加到 TextView 中，在回收站视图中显示了错误的文本

public class RvAdapterKlasse extends RecyclerView.Adapter<RvAdapterKlasse.ViewHolderKlasse> {

    DatabaseHelper mDatabaseHelper;

    static TextView itemTextView, unitItemTextView;
    static ImageView itemImageView;
    static CheckBox checkBox;

    static ArrayList<Integer> positions = new ArrayList();


    public class ViewHolderKlasse extends RecyclerView.ViewHolder {

        public ViewHolderKlasse(@NonNull final View itemView) {

            super(itemView);

            mDatabaseHelper = new DatabaseHelper(itemView.getContext());

            itemTextView = itemView.findViewById(R.id.textViewItem);
            itemImageView = itemView.findViewById(R.id.imageViewItem);
            unitItemTextView = itemView.findViewById(R.id.unitTextViewItem);
            checkBox = itemView.findViewById(R.id.checkBox);



        }
    }

    @NonNull
    @Override
    public ViewHolderKlasse onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {

        View itemView1 = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item_layout1, null);

        return new ViewHolderKlasse(itemView1);
    }

    @Override
    public void onBindViewHolder(@NonNull final ViewHolderKlasse viewHolderKlasse, final int i) {

        Toast.makeText(unitItemTextView.getContext(), itemTexte2.get(i).toString(), Toast.LENGTH_SHORT).show();

        itemTextView.setText(itemTexte2.get(i).toString());
        unitItemTextView.setText(itemTexte2.get(i).toString());
        itemImageView.setImageResource(R.drawable.dots);


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

            }
        });

        viewHolderKlasse.itemView.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {

                Intent intent = new Intent(v.getContext(), PriceActivity.class);
                String text = ((TextView) MainActivity.recyclerView1.findViewHolderForAdapterPosition(i).itemView.findViewById(R.id.textViewItem)).getText().toString().trim();
                intent.putExtra("product", text);
                v.getContext().startActivity(intent);

                return false;
            }
        });


        checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            }
        });

    }

    @Override
    public int getItemCount() {

        return itemTexte2.size();

    }

}

Answer 1

您已将 itemTextView 定义为 static TextView。这意味着您的所有项目只有其中一个。每个视图持有者需要一个。

删除 itemTextView 的静态定义并在视图持有者 ViewHolderKlasse 中定义一个名为 itemTextView 的 class 成员变量。然后，您将在 onBindViewHolder() 中设置此变量，如下所示：

viewHolderKlasse.itemTextView.setText(itemTexte2.get(i).toString());

这应该可以解决这个问题。您还有其他需要处理的静态字段。

Android Studio 将 RecyclerView 中的文本错误设置为 TextView

Android Studio wrong text is set to TextView in RecyclerView

android

textview

settext

android-recyclerview