[英]Android context using “this” on class that is not an activity
我创建了以下类,以使用两种不同的视图填充listView
。 包含的两种类型之一是微调器,我正在尝试使用捆绑包中包含的Arraylists
(每个微调器一个)填充它。 我要处理的问题是ArrayAdapter
构造函数,它显然与我使用的上下文有关(“ this”)有问题。 有任何想法吗?
public class InsertAdapter extends BaseAdapter {
private static final int OWN_KEY = 0;
private static final int FOREIGN_KEY = 1;
private ArrayList<ColumnProperties> columns = new ArrayList<ColumnProperties>();
private Bundle spinner_strings;
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position){
return (columns.get(position).isForeign()) ? FOREIGN_KEY : OWN_KEY;
}
@Override
public int getCount() {
return columns.size();
}
@Override
public Object getItem(int position) {
return getItem(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(int position, View view, ViewGroup parent) {
int type = getItemViewType(position);
if (view == null) {
LayoutInflater inflater =
LayoutInflater.from(parent.getContext());
if(type==0) {
view = inflater.inflate(
R.layout.text_field, parent, false);
}else{
view = inflater.inflate(
R.layout.text_spinner, parent, false);
}
}
ColumnProperties column = columns.get(position);
TextView col_name = (TextView) view.findViewById(R.id.column_name);
col_name.setText(column.getName());
if(type==FOREIGN_KEY){
Spinner spinner = (Spinner) view.findViewById(R.id.foreign_keys);
ArrayList<String> spinner_list = spinner_strings.getStringArrayList(column.getName());
//List<String> list;
ArrayAdapter spinner_adapter = new ArrayAdapter(this , android.R.layout.simple_spinner_item,spinner_list);
spinner_adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(spinner_adapter);
}
return view;
}
public void getSpinnerStrings(Bundle spinner_strings){
this.spinner_strings = spinner_strings;
}
}
@ρяσsρєяK写道:
使用
view.getContext()
或parent.getContext()
代替this
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