Question

我正在尝试创建一个客户ListView我已经设置了布局和getView方法但我不确定如何将新视图从getView绑定到我的适配器？

我从[{1}}延伸feedClass我有ArrayAdapter<String>方法：

getView

}

在从public class FeedClass extends ArrayAdapter<String> { private final Context context; public FeedClass(Context context) { super(context, R.layout.feed_item_layout); this.context = context; } @Override public View getView(int position, View convertView, ViewGroup parent) { LayoutInflater inflater = (LayoutInflater) context .getSystemService(Context.LAYOUT_INFLATER_SERVICE); View rowView = inflater.inflate(R.layout.feed_item_layout, parent, false); ImageView tweetPicture = (ImageView) rowView .findViewById(R.id.tweetPicture); TextView tweetDescription = (TextView) rowView .findViewById(R.id.tweetDescription); TextView legends = (TextView) rowView.findViewById(R.id.legends); tweetPicture.setImageResource(R.drawable.ic_profile); tweetDescription.setText("Hello"); legends.setText("Legends"); //How to show this data in the ListView? return rowView; }延伸的MainActivity中我有这个：

ListActivity

目前它正在使用数组，现在我不知道如何将自定义视图从getView传递给它？请帮忙。

Answer 1

您需要扩展BaseAdapter并覆盖getView方法

public class FeedClass extends BaseAdapter {

private Context context;
private ArrayList<String> arrayList;

public FeedClass(Context context, ArrayList<String> arrayList) {
    this.context = context;
    this.arrayList = arrayList;
}

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

@Override
public Object getItem(int arg0) {
    return arrayList.get(arg0);
}

@Override
public long getItemId(int arg0) {
    return arg0;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    View rowView = inflater.inflate(R.layout.feed_item_layout, parent,
            false);

    ImageView tweetPicture = (ImageView) rowView
            .findViewById(R.id.tweetPicture);
    TextView tweetDescription = (TextView) rowView
            .findViewById(R.id.tweetDescription);
    TextView legends = (TextView) rowView.findViewById(R.id.legends);

    tweetPicture.setImageResource(R.drawable.ic_profile);
    // set the text from the ArrayList
    tweetDescription.setText(arrayList.get(position));
    // set the text from the ArrayList
    legends.setText(arrayList.get(position));

    return rowView;
}
}

Answer 2

我假设您有一个名为feedClass的自定义适配器，并且您希望将其设置为ListActivity

  LayoutInflater inflater;
  public FeedClass(Context context)
  {
     super(context, R.layout.feed_item_layout);
     inflater = LayoutInflater.from(context);  
     // no need to initialize everytime in getview
     // so you can initialize in the constructor
  }

还使用ViewHolder模式进行平滑滚动和演奏

http://developer.android.com/training/improving-layouts/smooth-scrolling.html

现在

 FeedClass fc = new FeedClass(MainActivity.this);
 setListAdapter(fc);

我在网上找到的例子

http://android.vexedlogic.com/2011/04/02/android-lists-listactivity-and-listview-ii-%E2%80%93-custom-adapter-and-list-item-view/

Answer 3

ListActivity有自己的适配器实现，您已经正确地完成了但是如果你想使用你自己的Adapter类实例，那么你需要扩展你的活动文件来扩展Activity然后你可以使用你的适配器getView方法

如何将自定义getView绑定到ListView适配器？

3 个答案: