向Listview添加项目

// 创建一个数组适配器
ArrayAdapter<String> adapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, new String[]{"Item 1", "Item 2", "Item 3"});

// 获取 ListView 实例
ListView listView = findViewById(R.id.listView);

// 设置适配器
listView.setAdapter(adapter);

// 添加新项目
adapter.add("New Item");
adapter.notifyDataSetChanged(); // 通知适配器数据已更改

static class ViewHolder {
    TextView text;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder;
    if (convertView == null) {
        convertView = LayoutInflater.from(context).inflate(R.layout.list_item, parent, false);
        holder = new ViewHolder();
        holder.text = convertView.findViewById(R.id.text_view);
        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    holder.text.setText(getItem(position));
    return convertView;
}