代码之家 › 专栏 › 技术社区 › Jan Bej-Radzikowski

未调用微调器getView()的自定义ArrayAdapter

android-spinner android-arrayadapter android

Jan Bej-Radzikowski · 技术社区 · 7 年前

自定义阵列适配器有问题。我阅读了堆栈上的所有线程,但仍然无法解决此问题。我使用了这个问题中的代码(它不起作用,所以我做了一些小改动: Spinner with custom ArrayAdapter for objects not displaying selected item

问题是我创建了适配器,并且: 1、getCount显示正确值(244) 2、未调用getView 3、未调用getDropdown视图。

你能帮我解决这个问题吗?

适配器类别:

public class DishesFilterCustomArrayAdapter extends ArrayAdapter<Dish> {

private List<Dish> items;
private Context context;
private Activity activity;

public DishesFilterCustomArrayAdapter(@NonNull Context context, int resource, int textViewResourceId, @NonNull List<Dish> objects) {
    super(context, resource, textViewResourceId, objects);
    this.items = objects;
    this.context = context;
}

@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
    TextView v = (TextView) super.getView(position, convertView, parent);

    if (v == null) {
        v = new TextView(context);
    }
    v.setTextColor(context.getResources().getColor(R.color.blue_light));
    v.setText(items.get(position).dishName);

    return v;
}

@Override
public Dish getItem(int position) {
    return items.get(position);
}

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

    if (v == null) {
        LayoutInflater inflater = LayoutInflater.from(context);
        v = inflater.inflate(R.layout.payment_mode_payer_item, null);
    }
    TextView lbl = (TextView) v.findViewById(R.id.textViewForAdapter);
    lbl.setTextColor(context.getResources().getColor(R.color.blue_light));
    lbl.setText(items.get(position).dishName);

    return convertView;
}

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

public List<Dish> getItems() {
    return items;
}

片段中的代码:

        mDishList = new ArrayList<>();
        mDishList.addAll(getAllDishesSegregatedList(getAllDishesList()));
        mDishesAdapter = new DishesFilterCustomArrayAdapter(getContext(), R.layout.payment_mode_payer_item, R.id.textViewForAdapter, mDishList);
        //mDishesAdapter.add(new Dish(getString(R.string.filter_receipt_history_by_dish_name)));
        dishesFilterSpinner.setAdapter(mDishesAdapter);

mDishList大小为244,它与getCount()值匹配。

1 回复 | 直到 7 年前

Jan Bej-Radzikowski 7 年前

问题已解决。第一个错误是,我有两个id相同的视图,我将适配器设置为不可见的视图。

其次,我的自定义适配器的代码中有一些错误。我把它贴在下面。

public class DishesFilterCustomArrayAdapter extends ArrayAdapter<Dish> {

private List<Dish> items;
private Context context;

public DishesFilterCustomArrayAdapter(@NonNull Context context, int resource, int textViewResourceId, @NonNull List<Dish> objects) {
    super(context, resource, textViewResourceId, objects);
    this.items = objects;
    this.context = context;
}

@Override
public View getDropDownView(int position, View convertView, ViewGroup parent) {
    View v = convertView;

    if (v == null) {
        LayoutInflater inflater = LayoutInflater.from(context);
        v = inflater.inflate(R.layout.receipt_history_spinner_item, null);
    }
    TextView lbl = (TextView) v.findViewById(R.id.receiptHistorySpinnerItemTextView);
    lbl.setTextColor(context.getResources().getColor(R.color.blue_light));
    lbl.setText(items.get(position).dishName);

    return v;
}

@Override
public Dish getItem(int position) {
    return items.get(position);
}

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

    if (v == null) {
        LayoutInflater inflater = LayoutInflater.from(context);
        v = inflater.inflate(R.layout.receipt_history_spinner_item, null);
    }
    TextView lbl = (TextView) v.findViewById(R.id.receiptHistorySpinnerItemTextView);
    lbl.setTextColor(context.getResources().getColor(R.color.blue_light));
    lbl.setText(items.get(position).dishName);

    return v;
}

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

public List<Dish> getItems() {
    return items;
}

迈克。M谢谢你的帮助!