Question

我尝试使用Custom ArrayAdapter填充微调器。我认为微调器正常填充，但是当应用程序尝试打开它时，微调器显示com.jeanjn.guiadeacademia ....，但是要显示我在getView（...）上的TextView中插入的文本< / p>

Obs：我不会说英语，抱歉。

Obs2：我用ListView做到了，效果很好。现在有了Spinner ......

我的代码：

private void carregarSpinner() {
    Spinner spinner = (Spinner) findViewById(R.id.CateSpinner);
    DataBase db = new DataBase(this); 
    Cursor cursor = db.getData("SELECT * FROM Categoria");
    ArrayList<Categoria> txts = new ArrayList<Categoria>();
    while(cursor.moveToNext())
    {
        Categoria ex = new Categoria();
        ex.setNome(cursor.getString(1));
        ex.setId(cursor.getInt(0));
        txts.add(ex);
    }
    AdapterCategoria adapter = new AdapterCategoria(this, txts);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    spinner.setAdapter(adapter);
    spinner.setOnItemSelectedListener(this);
    db.closeDB(cursor);
}


public class AdapterCategoria extends ArrayAdapter<Categoria> {

    private final Context context;
    private final ArrayList<Categoria> itemsArrayList;

    public AdapterCategoria(Context context, ArrayList<Categoria> itemsArrayList) {

        super(context, R.id.txvCategoria, itemsArrayList);

        this.context = context;
        this.itemsArrayList = itemsArrayList;
    }

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

        // 1. Create inflater 
        LayoutInflater inflater = (LayoutInflater) context
            .getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        // 2. Get rowView from inflater
        View rowView = inflater.inflate(R.layout.categoria_model, parent, false);

        // 3. Get the two text view from the rowView
        TextView labelView = (TextView) rowView.findViewById(R.id.txvCategoria);

        // 4. Set the text for textView 
        labelView.setText(itemsArrayList.get(position).getNome());
        labelView.setTag(itemsArrayList.get(position).getId());

        // 5. retrn rowView
        return rowView;
    }

Answer 1

getDropDownView中的ArrayAdapter方法希望items对象成为CharSequence的实例，否则会将item.toString()设置为Textview。这就是为什么你在微调器下拉物品中看到class name（com.jeanjn.guiadeacademia）的原因

由于您的商品对象为Categoria，因此您需要覆盖getDropDownView并提供此类自定义视图，

@Override
public View getDropDownView(int position, View convertView,ViewGroup parent) {
        TextView row = (TextView) super.getView(position, convertView, parent);
        row.setText(getItem(position).getNome());
        return row;
}

此外，将您的自定义适配器超级构造函数调用更改为

super(context, R.layout.categoria_model, R.id.txvCategoria,itemsArrayList);

其中R.layout.categoria_model是自定义布局，而R.id.txvCategoria是布局中的textview

Spinner里面的TextView显示com.jeanjn.guiadeacademia

1 个答案: