java 无法在我的 ListView 上的自定义 ArrayAdapter 中获取所选项目索引
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Can't get Selected Item Index in custom ArrayAdapter on my ListView
提问by boski
I have problem with my Android project, because I can't get selected item index from my List with my own ArrayAdapter. I've tried few examples from tutorials but they don't work. What is the solution?
我的 Android 项目有问题，因为我无法使用自己的 ArrayAdapter 从我的列表中获取所选项目索引。我已经尝试了一些教程中的示例，但它们不起作用。解决办法是什么？
Adapter
适配器
public class myProductAdapter extends ArrayAdapter<myProductsGroup> {
private List<myProductsGroup> productList;
private Context context;
public myProductAdapter(List<myProductsGroup> productList, Context ctx) {
super(ctx, R.layout.list_products_row, productList);
this.productList = productList;
this.context = ctx;
}
@Override
public int getCount() {
return productList.size();
}
/*
public void onClick(View v) {
int position = Integer.parseInt((String) v.getTag());
OrderFirstGridPage.setSelectedItem(position);
}
*/
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_products_row, parent, false);
}
TextView tv = (TextView) convertView.findViewById(R.id.title);
tv.setTag(""+position);
TextView distView = (TextView) convertView.findViewById(R.id.description);
distView.setTag(""+position);
tv.setText("aa");
return convertView;
}
}
In activity
活动中
lv = (ListView) findViewById(R.id.listView1);
lv.setAdapter(new myProductAdapter(setupArrayProductList((ArrayList<myProduct>) ProductList), OrderFirstGridPage.this));
lv.setSelector(R.drawable.selector_for_position_list);
回答by androidcodehunter
Try to use this line of code:
尝试使用这行代码：
lv = (ListView) findViewById(R.id.listView1);
lv.setAdapter(new myProductAdapter(setupArrayProductList((ArrayList<myProduct>) ProductList), OrderFirstGridPage.this));
lv.setSelector(R.drawable.selector_for_position_list);
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent,
View view, int position, long id) {
Log.d("My POSITION",""+position);
}
});
Hope you will get the exact position from selected listview. If you get any problem, please inform me. Hope this will works.
希望您能从选定的列表视图中获得准确的位置。如果您有任何问题，请通知我。希望这会奏效。
回答by user2409032
You need to implement AdapterView.OnItemClickListener: http://developer.android.com/reference/android/widget/AdapterView.OnItemClickListener.html
你需要实现AdapterView.OnItemClickListener：http: //developer.android.com/reference/android/widget/AdapterView.OnItemClickListener.html
public abstract void onItemClick (AdapterView<?> parent, View view, int position, long id)
There, you'll get the index of each item.
在那里，您将获得每个项目的索引。
You just have to set that listener to your list:
您只需将该侦听器设置为您的列表：
lv.setOnItemClickListener(yourListener);
