ListActivity TwoLineListItem替代方案

时间:2012-11-27 20:20:51

标签: java android listactivity

我注意到从API 17开始不推荐使用TwoLineListItem。如果我按如下方式设置ListActivity适配器,可以使用哪种替代方法?:

ArrayAdapter<File> adapter = new ArrayAdapter<File>(this,android.R.layout.simple_list_item_2,filesArrayList){
            @Override
            public View getView(int position, View convertView, ViewGroup parent){
                final TwoLineListItem row;
                if(convertView == null){
                    LayoutInflater inflater = (LayoutInflater)getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
                    row = (TwoLineListItem)inflater.inflate(android.R.layout.simple_list_item_2, null);
                }else{
                    row = (TwoLineListItem)convertView;
                }
                row.getText1().setText(filesArrayList.get(position).getTitle());
                row.getText2().setText2(filesArrayList.get(position).getDescription());
                return row;
            }

        };

3 个答案:

答案 0 :(得分:15)

只需将TwoLineListItem源代码剪切并粘贴到您自己的布局中:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">

    <TextView android:id="@+id/text1"
        android:textSize="16sp"
        android:textStyle="bold"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

    <TextView android:id="@+id/text2"
        android:textSize="16sp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</LinearLayout>

(注意我改变了ID以保持一致性。)

现在使用一个ViewHolder来保持对TextViews的引用:

public View getView(int position, View convertView, ViewGroup parent){
    ViewHolder holder;
    if(convertView == null){
        // You should fetch the LayoutInflater once in your constructor
        LayoutInflater inflater = (LayoutInflater)getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        convertView = inflater.inflate(R.layout.list_item_2, null);

        // Initialize ViewHolder here
    }else{
        holder = (ViewHolder) convertView.getTag();
    }

    File file = filesArrayList.get(position);
    holder.text1.setText(file.getTitle());
    holder.text2.setText2(file.getDescription());
    return convertView;
}

答案 1 :(得分:6)

我就这样做了:

    mAdapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_2, mListItems)
    {
        @Override
        public View getView(int position, View convertView, ViewGroup parent)
        {
            View row;
            if(convertView == null)
            {
                row = (View)mInflater.inflate(android.R.layout.simple_list_item_2, parent, null);
            }
            else
            {
                row = (View)convertView;
            }
            TextView v = (TextView) row.findViewById(android.R.id.text1);
            v.setText(mListItems[position]);
            v = (TextView) row.findViewById(android.R.id.text2);
            v.setText(mListSubItems[position]);
            return row;
        }
    };
    ListView lv = (ListView) getActivity().findViewById(R.id.runsListView);
    lv.setAdapter(mAdapter);
    lv.setOnItemClickListener(mMessageClickedHandler); 

答案 2 :(得分:0)

首先是弃用,所以这对你来说并不算太糟糕。因为它将永远得到支持。 ;)

<强> If it ain’t broke, don’t fix it.

您可以自由使用任何布局! 如果您使用模式选择,只需添加一些背景来回复所选状态,例如:

android:background="?android:attr/activatedBackgroundIndicator"