使用arrayadapter填充的ListView [英] populating listview using arrayadapter

问题描述

我要显示两个字符串以下任一其他的，就好像它是一个列表。
我试着用simple_list_item_1管理来填充列表视图但没有什么是显示在屏幕上。

I want to display two strings one below other as if it is a list. I tried using simple_list_item_1 to populate listview but nothing is visible on the screen.

((ListView)view).setAdapter(new ArrayAdapter<String> 
(RealScreen.getAndroidBaseContext(),android.R.layout.simple_list_item_1, label));

，其中标签是包含两个项目要显示的阵列。所有我能看到的是一个白色的屏幕。此外，我想这个列表无法点击。

where label is an array which contains two items to be displayed. All I can see is a white screen. Also I want this list to be unclickable.

我想要的输出是这样的：

I want the output to be like this:

String 1
String 2

我不与活动合作，而不是与查看。
这里是一个创建视图中的方法

I am not working with the Activity, instead with the View. Here is the method which creates view

public void createView(JSONObject definition) {
    // TODO Auto-generated method stub
    super.createView(definition);
     final JSONArray rowArray = definition.optJSONArray(KeyConstants.KEY_ROWS);
     final JSONArray columnArray = definition.optJSONArray(KeyConstants.KEY_COLUMNS);
     if (rowArray != null) {
            label = new String[rowArray.length()];
            for (int i = 0; i < rowArray.length(); i++) {
                final JSONObject candidate = rowArray.optJSONObject(i);
                if(candidate!=null){
                    label[i]=candidate.optString(KeyConstants.KEY_LABEL_TEXT, null);
                }
            }
     }
    ((ListView)view).setAdapter(new ArrayAdapter<String>(RealScreen.getAndroidBaseContext(),android.R.layout.simple_list_item_1, label));
}

感谢。

推荐答案

首先创建一个自定义适配器类，如下

First create a custom Adapter Class as below

类MyAdapter扩展ArrayAdapter
    {

class MyAdapter extends ArrayAdapter {

    private Context context;

    private ArrayList<String> list;

    public MyAdapter(Context context,
            ArrayList<String> list) 
            { 
        super(context, R.layout.layout_list);
        this.context = context;
        this.list = list;
    }




    @Override
    public View getView(int position, View convertView, ViewGroup parent) 
    {

        ViewHolder holder = null;

        if (convertView == null) {
            holder = new ViewHolder();

            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            convertView = inflater.inflate(R.layout.layout_list,
                    null);

            convertView.setTag(holder);
            holder.string1  = (TextView) convertView
                    .findViewById(R.id.stringgID1);



            holder.string2  = (TextView) convertView
                    .findViewById(R.id.stringID2);


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


        holder.string1 .setText(list.get(postion));
        holder.string2 .setText(list.get(position));

        return convertView;
    }

    @Override
    public int getCount() {

        return list.size();
    }

    class ViewHolder {
        TextView string1 = null;
        TextView string2 = null;


    }

}

然后让你的活动延伸活动和不ListActivity

listView.setAdapter（新MyAdapter（youtactivityame.this，标签）;

listView.setAdapter(new MyAdapter(youtactivityame.this,label);

这样做有可以显示任意数量的列表项的标签。

Doing this the label with any number of list items can be displayed.

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