Question

我有一个ListView，我设置了一个警报对话框，当setText单击按钮时将文本更改为新的Edittext，然后在alertdialog上为此编辑文本设置setView

当我单击按钮AlertDialog显示时，我可以更改列表中的文本

但是当我滚动page时，将文本改回我在MainActivity中设置的文本

我的适配器代码

public class AdapterItem extends BaseAdapter {

private Context mContext;
private ArrayList<ItemModel> mItemModels;



public AdapterItem(Context context, ArrayList<ItemModel> list) {

    this.mContext = context;
    this.mItemModels = list;
}

@Override
public int getCount() {

    return mItemModels.size();
}

@Override
public Object getItem(int position) {

    return mItemModels.get(position);
}

@Override
public long getItemId(int position) {

    return 0;
}

@Override
public View getView(int position, View view, ViewGroup viewGroup) {

    if (view == null) {
        view = LayoutInflater.from(mContext).inflate(R.layout.item_simple_listview, viewGroup, false);

    }

    ItemModel item = (ItemModel) getItem(position);

    ImageButton imageButton = view.findViewById(R.id.imageButton);
    TextView text1 = view.findViewById(R.id.textViewONe);
    ImageView image = view.findViewById(R.id.imageViewItem);

    text1.setText(item.getTextOne());
    image.setImageResource(item.getImageView());

    final View finalView = view;

    imageButton.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            final EditText userinput = new EditText(mContext);

            new AlertDialog.Builder(mContext).setTitle("Change Text")
                .setMessage("Input Your Own Text").setPositiveButton("OK", new DialogInterface.OnClickListener() {

                @Override
                public void onClick(DialogInterface dialog, int which) {

                    TextView text1 = finalView.findViewById(R.id.textViewONe);
                    text1.setText(userinput.getText());

                }
            })
                .setCancelable(true).setView(userinput).create().show();

        }
    });

    return view;
}}

Answer 1

更改modelItem的内容并在适配器上调用notiDataSetChanged()。好吧你可以做

 imageButton.setTag(position); // set tag the position
        imageButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                final int post = (int) v.getTag(); // get position
                final EditText userinput = new EditText(mContext);

                new AlertDialog.Builder(mContext).setTitle("Change Text")
                        .setMessage("Input Your Own Text").setPositiveButton("OK", new DialogInterface.OnClickListener() {

                    @Override
                    public void onClick(DialogInterface dialog, int which) {

                        ItemModel itemModel = mItemModels.get(post);

                        itemModel.setTextOne(userinput.getText().toString()); // change the data set at the position
                        notifyDataSetChanged(); // refresh adapter

                    }
                })
                        .setCancelable(true).setView(userinput).create().show();

            }
        });

一些建议：切换到listview的recyclerview或至少实现viewholder模式。

滚动时将listView中的Textview改回

1 个答案: