Question

我需要添加arraylist中的所有项目

logcat的：

E/BUSINESS_STR: fuflfilled
E/itemsaArrayList: [com.model.CommonListItems@307c24ff, com.model.CommonListItems@307c24ff]

代码：

if(BUSINESS_STR != null){

    Log.e("BUSINESS_STR", "" + BUSINESS_STR);

    CommonListItems commonListItems = new CommonListItems();


    for(int i = 0; i <= 1 ; i++) {
        commonListItems.setName("My Business");
        commonListItems.setName("Search Business");

        commonListItems.setImage(String.valueOf(R.drawable.business_icon));
        commonListItems.setImage(String.valueOf(R.drawable.search_business_icon));

        itemsaArrayList.add(commonListItems);
    }

    tvTitle.setText("Business");
}

最后，它将最后一项"Search Business"添加两次。我需要先添加"My Business"，然后再添加"Search Business"。

Answer 1

删除for循环：

commonListItems.setName("My Business");
commonListItems.setImage(String.valueOf(R.drawable.business_icon));
itemsaArrayList.add(commonListItems);

commonListItems = new CommonListItems();

commonListItems.setName("Search Business");
commonListItems.setImage(String.valueOf(R.drawable.search_business_icon));
itemsaArrayList.add(commonListItems);

Answer 2

添加

commonListItems = new CommonListItems();

作为 for 循环中的第一个语句。现在你的代码将是这样的

if(BUSINESS_STR != null){

Log.e("BUSINESS_STR", "" + BUSINESS_STR);

CommonListItems commonListItems;


for(int i = 0; i <= 1 ; i++) {
    commonListItems = new CommonListItems();
    if(i==0){
       commonListItems.setName("My Business" + i);
       commonListItems.setImage(String.valueOf(R.drawable.business_icon));
   } else {
      commonListItems.setName("Search Business" + i);
      commonListItems.setImage(String.valueOf(R.drawable.search_business_icon));
   }

    itemsaArrayList.add(commonListItems);
}

tvTitle.setText("Business");
}

Answer 3

您在列表中添加CommonListItems的相同实例 - 两次。删除for循环并创建两个CommonListItems类型的对象。

CommonListItems commonListItem1 = new CommonListItems();
commonListItem1.setName("My Business");
commonListItem1.setImage(String.valueOf(R.drawable.business_icon)); 

CommonListItems commonListItem2 = new CommonListItems();
commonListItem2.setName("Search Business");
commonListItem2.setImage(String.valueOf(R.drawable.search_business_icon));

itemsaArrayList.add(commonListItem1);
itemsaArrayList.add(commonListItem2);

仅在arraylist中添加最后一项两次

3 个答案: