Question

列表视图正在运行。但我想为此数据列表添加自定义列表视图。我从预填充数据库中检索数据。这是我试过的。我在活动课上遇到错误。

CustomListViewAdapter

public class CustomListViewAdapter extends ArrayAdapter<Organization> {

Context context;

public CustomListViewAdapter(Context context, int layout,
                             List<Organization> items) {
    super(context, layout, items);
    this.context = context;
}

/*private view holder class*/
private class ViewHolder {

    TextView txtTitle;

}

public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;
    Organization rowItem = getItem(position);

    LayoutInflater mInflater = (LayoutInflater) context
            .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.single_row_item, null);
        holder = new ViewHolder();

        holder.txtTitle = (TextView) convertView.findViewById(R.id.org_name);
        convertView.setTag(holder);

        convertView.setTag(holder);
    } else
        holder = (ViewHolder) convertView.getTag();


    holder.txtTitle.setText(rowItem.getTitle());


    return convertView;
}}

Bean Class

public class Organization {

    private String title;


    public Organization(String title) {

        this.title = title;

    }

    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }    }

活动类

public class ContactView extends Activity {
    private ListView listView;
    private ListView listView1;
    List<Organization> rowItems;
    @Override
    protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
    setContentView(R.layout.list_view);


    this.listView = (ListView) findViewById(R.id.listView);
    DBAccess databaseAccess = DBAccess.getInstance(this);
    databaseAccess.open();
    List<String> quotes = databaseAccess.getQuotes(getIntent().getStringExtra("ID_EXTRA"));
    databaseAccess.close();


    listView = (ListView) findViewById(R.id.listView);
    CustomListViewAdapter adapter = new CustomListViewAdapter(this,
            R.layout.single_row_item, quotes);
    listView.setAdapter(adapter);

}}

错误我正在

Error:(81, 41) error: constructor CustomListViewAdapter in class CustomListViewAdapter cannot be applied to given types;

必需：Context，int，List 发现：ContactView，int，List 原因：实际参数List无法通过方法调用转换转换为List

Answer 1

在databaseAccess.close();

之后进行这些更改

List<Organization> rowItem=new ArrayList<Organization>();
for(String quote:quotes){
    Organization temp=new Organization(quote);
    rowItem.add(temp);
}
listView = (ListView) findViewById(R.id.listView);
CustomListViewAdapter adapter = new CustomListViewAdapter(this,
        R.layout.single_row_item, rowItem);
listView.setAdapter(adapter);

您当前代码的问题是CustomListViewAdapter的构造函数期望第三个参数为List类型Organization，但您传递List类型String }。

如何为预填充SQLite数据列表添加自定义列表视图？

1 个答案: