java - Android:数组适配器不显示ListView

Question

我的适配器:

import java.util.List;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

public class NewAdapter extends ArrayAdapter<Presenter> {
    Context context;
    List<Presenter> presenterList;
    private LayoutInflater mmInflater;

    public NewAdapter(Context context, List<Presenter> data) {
        super(context, R.layout.listview_item_row_presenters);
        mmInflater = LayoutInflater.from(context);
        this.context = context;
        this.presenterList = data;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View itemView = convertView;
        if (itemView == null) {
            itemView = mmInflater.inflate(R.layout.listview_item_row_presenters, parent, false);
        }


        Presenter currentPresenter = presenterList.get(position);


        ImageView imageView = (ImageView)itemView.findViewById(R.id.imgIcon);
        imageView.setImageBitmap(currentPresenter.getImage());


        TextView titleText = (TextView) itemView.findViewById(R.id.txtTitle);
        titleText.setText(currentPresenter.getName());


        TextView descripText = (TextView) itemView.findViewById(R.id.txtAbout);
        descripText.setText(currentPresenter.getInfo());


        return itemView;
    }               
}

调用并将适配器设置为ListView的方法

private void populateListView(List<Presenter> presList) {
    ArrayAdapter<Presenter> adapter = new NewAdapter(this.getBaseContext(), presList);
    ListView list = (ListView) findViewById(R.id.listViewPres);
    list.setAdapter(adapter);
}

我有 Logcat 输出，证明没有数据为空或空，没有错误或任何东西:/我只能猜测这是上下文和充气机的问题，但我不明白为什么

提前谢谢

Answer 1

改变

 super(context, R.layout.listview_item_row_presenters);

与

super(context,  R.layout.listview_item_row_presenters, data); // add data

当您扩展ArrayAdapter时，构造函数中的super处理listItem大小，并且您需要将列表传递给构造函数方法

示例代码可以参见第2.3节@AndroidListView