ListView复制Android [英] ListView Duplicates Android
问题描述
当我从表格中获得搜索结果时,结果显示两次.
When I get a search result from my table, the results show up twice.
结果"a/a","aa/aa"和"ab/a"都是正确的,应该存在.但是,我不希望在第三个listview条目中有重复的值.
The results "a / a", "aa / aa", and "ab / a" are all correct and should be there. However, I don't want the duplicate values in the third listview entry.
有任何想法为什么会发生这种情况?
Any ideas why this is happening?
主屏幕
// Set up search array
for(int i = 0; i < isbn.length; i++)
{
searchArray.add(new InventoryItem(isbn[i], InventoryAdapter.getTitleAndAuthorByISBN(isbn[i])));
}
Toast.makeText(getApplicationContext(), "searchArray.size()="+searchArray.size(), Toast.LENGTH_LONG).show();
// add data in custom adapter
adapter = new CustomAdapter(this, R.layout.list, searchArray);
ListView dataList = (ListView) findViewById(R.id.list);
dataList.setAdapter(adapter);
CustomAdapter
public class CustomAdapter extends ArrayAdapter<InventoryItem> {
Context context;
int layoutResourceId;
LinearLayout linearMain;
ArrayList<InventoryItem> data = new ArrayList<InventoryItem>();
public CustomAdapter(Context context, int layoutResourceId,
ArrayList<InventoryItem> data) {
super(context, layoutResourceId, data);
this.layoutResourceId = layoutResourceId;
this.context = context;
this.data = data;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
if (row == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
linearMain = (LinearLayout) row.findViewById(R.id.lineraMain);
}
InventoryItem myItem = data.get(position);
TextView label = new TextView(context);
label.setText(myItem.details);
linearMain.addView(label);
return row;
}
}
推荐答案
好,问题出在您的getView(int position, View convertView, ViewGroup parent)
方法中,因为您一直在将视图添加到listview为您提供的先前回收的视图中.除了动态创建textview之外,您还应该在创建视图时对其进行充气.
Well, the problem is in your getView(int position, View convertView, ViewGroup parent)
method, because you keep adding views to the previously recycled view that listview provides you. Instead of creating a textview dynamically, you should inflate it when you create your view.
例如,要解决此问题:
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = null;
if (convertView == null) {
LayoutInflater inflater = ((Activity) context).getLayoutInflater();
row = inflater.inflate(layoutResourceId, parent, false);
//Make sure the textview exists in this xml
} else {
row = convertView;
}
InventoryItem myItem = data.get(position);
TextView label = (Textview) row.findViewById(R.id.YOU_TEXT_VIEW_ID);
label.setText(myItem.details);
return row;
}
这篇关于ListView复制Android的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!