onItemLongClick是否未定义？

Question

I'm trying to implement a long click in my listview item but it doesn't work and i get an error that says is undefined . Here's the code:

protected void setOnItemLongClickListener(ListView l, View v, int position, long id) {
        super.onItemLongClick(l, v, position, id);// Error

        ApplicationInfo app = applist.get(position);
        try {
            Intent intent = packageManager
                    .getLaunchIntentForPackage(app.packageName);

            if (null != intent) {
                startActivity(intent);
            }
            } catch (ActivityNotFoundException e) {
                Toast.makeText(MainActivity.this, e.getMessage(),
                        Toast.LENGTH_LONG).show();
            } catch (Exception e) {
                Toast.makeText(MainActivity.this, e.getMessage(),
                        Toast.LENGTH_LONG).show();
            }

    }

Someone has an idea how solve the problem?Thanks

Answer 1

The reason for this is most likely that you don't implement the listener. Something like

public class ActivityName extends Activity implements OnItemLongClickListener{

Try changing

protected void setOnItemLongClickListener

to

protected boolean setOnItemLongClickListener{
      // your code
      return true;

You need to use the proper return type for the method which is boolean then return true so the listener knows it was a success.

Docs

Answer 2

Please replace

public class MainActivity extends Activity  implements OnItemLongClickListener

and add unimplemented method

@Override
    public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2,
            long arg3) {
        // TODO Auto-generated method stub
        return false;
    }

by default you can do this by right clicking on OnItemLongClickListener select Quick fix

Answer 3

try this listener for Listview :

istView.setOnItemLongClickListener(new OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> arg0, View arg1,
                int arg2, long arg3) {
            Toast.makeText(arg0.getContext(), ((TextView)arg1).getText(), Toast.LENGTH_SHORT).show();
            return false;
        }
    });

Answer 4

use this code

yourListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {

            //YOUR_CODE_HERE

            return false;
        }
    });

Answer 5

try to add this lines to your list adapter

        view.setOnLongClickListener(new View.OnLongClickListener() {

            @Override
            public boolean onLongClick(View v) {
                return false;
            }
        });

and the method is try to overwrite your method

@Override
public boolean onItemLongClick(
        AdapterView<?> parent, View view,
        int position, long id) {
    // TODO Auto-generated method stub
    return false;
}