Question

您好我正在下载XML并解析数据。我想将数据添加到微调器。每次运行应用程序时，数据都会更新。

public class Main extends ListActivity {
    TextView valueTextView;
    HashMap<String, String> name=null;
    private HashMap<String, String> array_spinner[];

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main)
        ArrayList<HashMap<String, String>>mylist = new ArrayList<HashMap<String, String>>();
        String xml = XMLfunctions.getXML();
        Document doc = XMLfunctions.XMLfromString(xml);
        NodeList nodes = doc.getElementsByTagName("Table");
        Toast.makeText(Main.this, "ID '" + nodes.getLength(),Toast.LENGTH_LONG).show();     
        for (int i = 0; i < nodes.getLength(); i++) {
           HashMap<String, String> map = new HashMap<String, String>(); 
           Element e = (Element)nodes.item(i);
           map.put("id", XMLfunctions.getValue(e, "id"));
           map.put("name", "Name:" + XMLfunctions.getValue(e, "name"));
           map.put("Score", "Score: " + XMLfunctions.getValue(e, "score"));
           mylist.add(map);         
        }

    valueTextView = (TextView)findViewById(R.id.selected);
    Spinner s = (Spinner)findViewById(R.id.spinner);
    ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_spinner_item);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
}

其不完整的代码我不知道如何申请SpinnerAdapter请有人帮助我

谢谢

阿布舍克巴克

Answer 1

我会接受您的Hashmap并创建一个数组，而不知道您希望Spinner如何工作我会将名称和分数结合起来。然后像这样调用适配器：

String[] nameScore = (xml name score data in string array)
ArrayAdapter adapter= new ArrayAdapter(this, android.R.layout.simple_spinner_item, nameScore);
s.setAdapter(adapter);

任何比这更复杂的东西你都必须制作一个自定义适配器。

<强>答案:::

这是你做的。创建一个名为NameData的类，然后使用ID，名称和分数设置属性。

public class NameData {
    public int id;
    public String name;
    public int score;

    public NameData(int i, String n, int s) {
        this.id = i;
        this.name = n;
        this.score = s;
    }
}

接下来创建一个连接数据的方法解析它并将每个项放入此NameData对象

public List<NameData> getNameData() {
    List<NameData> list = new LinkedList<NameData>();

    //get data from url and parse it to your namedata object
    // /.....for loop (psuedo coding here...
        list.add(new NameData(id, name, score));
    // end for loop
    return list;
}

然后你需要创建一个自定义List适配器，它使用你为行设计的布局。：

private class ItemsAdapter extends BaseAdapter {
    NameData[] items;

    public ItemsAdapter(Context context, int textViewResourceId,   NameData[] md) {
        this.items = md;
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        TextView text1;
        View view = convertView;
        if (view == null) {
            LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = vi.inflate(R.layout.yourRowForListlayout, null);
        }
        text1 = (TextView) view.findViewById(R.id.yourRowForListlayoutTextView);
        text1.setText("" + (position+1));
        return view;
    }

    @Override
    public int getCount() {
        return this.items.length;
    }

    @SuppressWarnings("boxing")
    @Override
    public Object getItem(int p) {
        return p;
    }

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

然后在您的创建代码中，您可以获取此列表并将其直接添加到适配器：

List<NameData> list = getNameData();
adapter = new ItemsAdapter(this, R.layout.yourRowForListlayout, list.toArray(new NameData[list.size()]) );
setAdapter(adapter);

这就是我为自定义列表执行此操作的方式。

如何从xml动态地将数据添加到微调器中

1 个答案: