Spinner不显示条目

Question

我有两个微调器，一个用户选择食物类型，另一个用于显示食物（例如早餐和粥）。然而，我的第二个旋转器没有展示我的食物。为什么会这样？下面是我的MainActivity类和我的Food类代码。

private void chooseBreakfast() {
    planspinner1 = (Spinner) findViewById(R.id.planspinner);
    List<Food> planlist = new ArrayList<Food>();
    planlist.add(new Food("Porridge-35g/140cal",4));
    planlist.add(new Food("Coffee-10g/10cal",1));
    planlist.add(new Food("Toast-30g/90cal",3));

    for(int i =0;i<planlist.size();i++){
        System.out.println(planlist.get(i).getName()+ "has" + planlist.get(i).getCalories()+ "calories.");
    }

    ArrayAdapter<Food> planAdapter1 = new ArrayAdapter<Food>(this,android.R.layout.simple_spinner_item, planlist);
    planAdapter1.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    planspinner1.setAdapter(planAdapter1);
}

public class Food {
    private String mstrName;
    private int mintCalories;

    public Food(String pstrName, int pintCalories) {
        mstrName = pstrName;
        mintCalories = pintCalories;
    }

    public String getName() {
        return mstrName;
    }

    public int getCalories() {
        return mintCalories;
    }
}

为什么我的第二个微调器看起来像这样？

Answer 1

覆盖Food类的toString（）方法，它可能会有效。

  public class Food {
    private String mstrName;
    private int mintCalories;

    public Food(String pstrName, int pintCalories) {
        mstrName = pstrName;
        mintCalories = pintCalories;
    }

    public String getName() {
        return mstrName;
    }

    public int getCalories() {
        return mintCalories;
    }

    public String toString() {
        return getName();
    }

}