我将用什么适配器使用的HashMap在ListView [英] What adapter shall I use to use HashMap in a ListView

问题描述

我想用的HashMap 为适配器项目的列表为的ListView 。我正想 ArrayAdapter＆LT使用;＆GT; 但我不能，因为它正在与名单，其中;＆GT; 只。我将用什么接口？

I want to use HashMap for a list of items of Adapter for a ListView. I was going to use ArrayAdapter<> but I can't because it is working with List<> only. What adapter shall I use?

推荐答案

有没有predefined适配器，将呈现一个HashMap。我建议通过延长BaseAdapter创建自己的适配器。

There are no predefined Adapters which will render a HashMap. I suggest creating your own Adapter by extending BaseAdapter.

编辑：这是更多钞票使用HashMap的使用和扩展BaseAdapter，这里是一个（未经测试），例如：

It is posible to use HashMap with and extended BaseAdapter, here's an(untested) example:

public class HashMapAdapter extends BaseAdapter {

    private HashMap<String, String> mData = new HashMap<String, String>();
    private String[] mKeys;
    public HashMapAdapter(HashMap<String, String> data){
        mData  = data;
        mKeys = mData.keySet().toArray(new String[data.size()]);
    }

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

    @Override
    public Object getItem(int position) {
        return mData.get(mKeys[position]);
    }

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

    @Override
    public View getView(int pos, View convertView, ViewGroup parent) {
        String key = mKeys[pos];
        String Value = getItem(pos).toString();

        //do your view stuff here

        return convertView;
    }
}

这附带以下警告，这些项目的顺序是不能保证是你加入他们的顺序相同。写这个例子让我看清了;不要在一个适配器使用HashMap的：）

This comes with the following caveat, the order of the items is not guaranteed to be the same order you added them. Writing this example has made me realize; Don't use HashMap in an adapter :)

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