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3年前关闭。
我有两个类:
我必须在哪个类中使用方法
在
这是我的代码:
阵列适配器:
分段:
想改善这个问题吗?添加详细信息并通过editing this post阐明问题。
3年前关闭。
我有两个类:
fragment
和MyListAdapter
(数组适配器)。我必须在哪个类中使用方法
onItemSelected
?在
MyListAdapter
中不起作用.....这是我的代码:
阵列适配器:
public class MyListAdapter extends ArrayAdapter implements AdapterView.OnItemSelectedListener {
Spinner spinner;
/*public MyListAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}*/
public MyListAdapter(Context context) {
super(context, R.layout.single_listview_item);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
System.out.println("ciao");
spinner = (Spinner) convertView.findViewById(R.id.simpleSpinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getContext(),
R.array.country_arrays,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(this);
/*
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
*/
/* @Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//Spinner spinner = null;
// String selState = (String) ((Spinner) parent).getSelectedItem();
spinner.setSelection(position);
String selState = (String) ( parent).getSelectedItem();
Toast.makeText(
parent.getContext(),
"Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});*/
return row;
}
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
spinner.setSelection(position);
String selState = spinner.getSelectedItem().toString();
System.out.println(selState);
Toast.makeText(
getContext(),
"Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show();
/* Toast.makeText(parent.getContext(),
"OnItemSelectedListener : " + parent.getItemAtPosition(position).toString(),
Toast.LENGTH_SHORT).show();*/
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
/* @Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String selState = (String) spinner.getSelectedItem();
System.out.println(selState);
Toast.makeText(
getContext(),
"Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}*/
}
分段:
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the custom_spinner_items for this fragment
//super.onDestroy();
SharedPreferences settings = getContext().getSharedPreferences("states", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = settings.edit();
editor.clear();
editor.commit();
ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_list2, container, false);
listView = (ListView) rootView.findViewById(R.id.listview);
ListAdapter listAdapter = new MyListAdapter(getContext());
listView.setAdapter(listAdapter);
最佳答案
将以下代码用于适配器文件。
public class MyListAdapter extends ArrayAdapter {
Spinner spinner;
/*public MyListAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}*/
public MyListAdapter(Context context) {
super(context, R.layout.single_listview_item);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View row = convertView;
System.out.println("ciao");
spinner = (Spinner) convertView.findViewById(R.id.simpleSpinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getContext(),
R.array.country_arrays,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
@Override
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
//Spinner spinner = null;
String selState = spinner.getSelectedItem().toString();
// spinner.setSelection(position);
// String selState = (String) ( parent).getSelectedItem();
Toast.makeText(
parent.getContext(),
"Clicked on Planet: " + selState + "", Toast.LENGTH_SHORT).show();
}
@Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
return row;
}
}
07-26 09:42