问题
I'm having some trouble with updating my ListView.
So I used notifyDataSetChanged(); but it says that it can't be resolved.
Heres the part of the code that is not working:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_activity2);
background2= (RelativeLayout) findViewById(R.id.background);
final ListView theListView = (ListView) findViewById(R.id.listView);
Intent calledActivity=getIntent();
final List pe=calledActivity.getExtras().getStringArrayList("Caller1");
String []s =new String[pe.size()];
for(int i=0;i<pe.size();i++)
{
s[i]=(String)pe.get(i);
}
final ListAdapter theAdapter= new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, pe);
theListView.setAdapter(theAdapter);
final int cnt=1;
theListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String s1 = String.valueOf(parent.getItemAtPosition(position));
pe.remove(s1);
runOnUiThread(new Runnable() {
public void run() {
theAdapter.notifyDataSetChanged();
}
});
}
});
}
回答1:
notifyDataSetChanged
is not a method of ListAdapter
, but of BaseAdapter
, (ArrayAdapter is a subclass of BaseAdapter). To fix you can simply cast the ListAdapter
theListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
String s1 = String.valueOf(parent.getItemAtPosition(position));
pe.remove(s1);
((BaseAdapter)theAdapter).notifyDataSetChanged();
来源:https://stackoverflow.com/questions/28128734/error-cannot-resolve-notifydatasetchanged-android