Question

There was a question concerning removal of appendices in the program. I use such code:

import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;


public class dop extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.dop);
    PackageManager pm = this.getPackageManager();

    Intent intent = new Intent(Intent.ACTION_MAIN, null);
    intent.addCategory(Intent.CATEGORY_LAUNCHER);

    List<String> myList = new ArrayList<String>();
    ArrayList<ResolveInfo> list = (ArrayList<ResolveInfo>) pm.queryIntentActivities(intent, PackageManager.PERMISSION_GRANTED);
    for (ResolveInfo rInfo : list) {
    System.out.println("Installed Applications " + rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());
    myList.add(rInfo.activityInfo.applicationInfo.loadLabel(pm).toString());
    }
    ListView listView = (ListView) findViewById(R.id.list);
    ArrayAdapter<String> aa = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, myList);
    listView.setAdapter(aa);

    }
    public void onListItemClick(
            ListView parent, View v, int position, long id) {
        Intent intent = new Intent(Intent.ACTION_DELETE);
        intent.setData(Uri.parse("package:"+"some.package.to.remove"));
        startActivity(intent);
    }
}

But the removal code doesn’t work. What I not so do?

Answer 1

onListItemClick() is available only in ListActivity (and it’s actually a protected member), so basically you’re not overriding anything and that method is never getting called.

(to be sure you’re overriding something, put @Override before that method, the compiler will complain if that’s not an override and you’ll know something is wrong there)

As you’re building an Activity, you’ll need to make it implement OnItemClickListener, and in onCreate() set this listener on the ListView:

public class dop extends Activity implements OnItemClickListener {
//.....
    public void onCreate(Bundle bndl) {
        //....
        listView.setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(/*...*/) {
        // put here your click code
    }
}