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在listview中为textview使用holder

baseadapter android-adapter textview listview android

3iL Selvam Elangovan · 技术社区 · 7 年前

我正在实施一个 ListView 有2个 TextViews 在它里面。第一个 TextView 是我从查询中填充的产品的名称。当我触摸屏幕上的任何项目时 列表视图 一 Dialog 出现。当我确认 对话 我想换第二个文本到字符串,但每当我每秒这样做时 Textview 文本更改。例如,如果我在列表视图中有3个项目,并且我单击了第一个项目,那么只有该项目的文本视图应该更改,而不是全部三个。

这是我的基本适配器代码:

public class StrengthAdapter extends BaseAdapter {
    private ArrayList<Strengths> list;
    private LayoutInflater layoutInflater;
    private static HashMap<Integer, String> selectedStrengthsMap = new HashMap<Integer, String>();
    private String testing;

    public StrengthAdapter(Context context, ArrayList<Strengths> list, String test) {
        this.list = list;
        layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        this.testing = test;
        //HashMap<Integer, String> issuesStrengthsbrandNameIDMap = context
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return list.get(position);
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        final ViewHolder viewHolder;
        if (convertView == null){
            viewHolder = new ViewHolder();
            //viewHolder.position = position;
            convertView = layoutInflater.inflate(R.layout.strengthslistview, null);
            viewHolder.strengthCheckBox = (TextView) convertView.findViewById(R.id.strengthsCheckBox);
            viewHolder.chip = convertView.findViewById(R.id.chip);

            convertView.setTag(viewHolder);
        }else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.strengthCheckBox.setText(((Strengths) list.get(position)).getStrength_title());
        viewHolder.chip.setText(testing);
        //viewHolder.position = position;
        return convertView;
    }

    public static HashMap<Integer, String> sendSelectedStrengthMap(){
        return selectedStrengthsMap;
    }

    static class ViewHolder {
        TextView strengthCheckBox;
        TextView chip;
        //int position;
    }
}

这是我最初设置适配器的方式:

strengthListView.setAdapter(new StrengthAdapter(StrengthOfDemandsView.this, strengthsList, "TEST"));

这是我在关闭对话框后设置适配器的方式:

builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int id) {
                strengthListView.setAdapter(new StrengthAdapter(StrengthOfDemandsView.this, strengthsList, "TEST123"));

            }
        });

2 回复 | 直到 7 年前

Yev Kanivets 7 年前

您需要处理适配器内部的点击,而不是每次点击时都设置适配器。它必须看起来像这样:

@Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        final ViewHolder viewHolder;
        if (convertView == null){
            viewHolder = new ViewHolder();
            //viewHolder.position = position;
            convertView = layoutInflater.inflate(R.layout.strengthslistview, null);
            viewHolder.strengthCheckBox = (TextView) convertView.findViewById(R.id.strengthsCheckBox);
            viewHolder.chip = convertView.findViewById(R.id.chip);

            convertView.setTag(viewHolder);
        }else {
            viewHolder = (ViewHolder) convertView.getTag();
        }
        viewHolder.strengthCheckBox.setText(((Strengths) list.get(position)).getStrength_title());
        convertView.setOnClickListener(
             // show dialog here and then in positiveButton callback call
             //viewHolder.chip.setText(testing);
        );
        return convertView;
    }

Muhammad Saad Rafique 7 年前

首先,在创建支架之前对布局进行充气。然后,您需要通过实现onclicklistener来定义onclick行为。我更新了getView方法,请按如下方式实现:

@Override
public View getView(final int position, View convertView, ViewGroup parent) {
    final ViewHolder viewHolder;
    if (convertView == null){
        convertView = layoutInflater.inflate(R.layout.strengthslistview, null);
        viewHolder = new ViewHolder();
        //viewHolder.position = position;

        viewHolder.strengthCheckBox = (TextView) convertView.findViewById(R.id.strengthsCheckBox);
        viewHolder.chip = convertView.findViewById(R.id.chip);

        convertView.setTag(viewHolder);
    }else {
        viewHolder = (ViewHolder) convertView.getTag();
    }
    viewHolder.strengthCheckBox.setText(((Strengths) list.get(position)).getStrength_title());
    viewHolder.chip.setText(testing);
    //viewHolder.position = position;
convertView.setOnClickListener(
             //you can do your job here what u want to do by clicking specific row
        );
    return convertView;
}