[Java for Android App Development] devilsummer1992:
Hello guys,

I have a list of fragments created and I want to delete these fragment by long pressing on them. However, before doing so I want dialog fragment to pop up and offer the user the choice to delete or not. I have created the two fragments but I can't get the data across each other. I can't give functionality to the 'OK' button. Here is my code:

public class CourseListFragment extends Fragment implements
OnItemClickListener, OnItemLongClickListener {

public static final String ARG_ITEM_ID = "course_list";
public static final String YES_NO = "modify";

Activity activity;
ListView courseListView;
ArrayList<Course> courses;

CourseListAdapter courseListAdapter;
CourseDAO courseDAO;

private GetEmpTask task;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
activity = getActivity();
courseDAO = new CourseDAO(activity);
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.schedule_fragment_course_list,
container, false);
findViewsById(view);

task = new GetEmpTask(activity);
task.execute((Void) null);

courseListView.setOnItemClickListener(this);
courseListView.setOnItemLongClickListener(this);
return view;
}

private void findViewsById(View view) {
courseListView = (ListView) view.findViewById(R.id.list_course);
}

@Override
public void onItemClick(AdapterView<?> list, View view, int position,
long id) {
Course course = (Course) list.getItemAtPosition(position);

if (course != null) {
Bundle arguments = new Bundle();
arguments.putParcelable("selectedCourse", course);
CustomCourseDialogFragment customEmpDialogFragment = new CustomCourseDialogFragment();
customEmpDialogFragment.setArguments(arguments);
customEmpDialogFragment.show(getFragmentManager(),
CustomCourseDialogFragment.ARG_ITEM_ID);
}
}

@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {

// Show dialogFragment
FragmentManager fm = getActivity().getSupportFragmentManager();
CheckDialogFragment dialog = new CheckDialogFragment();
dialog.show(fm, YES_NO);

Course employee = (Course) parent.getItemAtPosition(position);
// Use AsyncTask to delete from database
courseDAO.deleteEmployee(employee);
courseListAdapter.remove(employee);

return true;
}

public class GetEmpTask extends AsyncTask<Void, Void, ArrayList<Course>> {

private final WeakReference<Activity> activityWeakRef;

public GetEmpTask(Activity context) {
this.activityWeakRef = new WeakReference<Activity>(context);
}

@Override
protected ArrayList<Course> doInBackground(Void... arg0) {
ArrayList<Course> courseList = courseDAO.getCourses();
return courseList;
}

@Override
protected void onPostExecute(ArrayList<Course> empList) {
if (activityWeakRef.get() != null
&& !activityWeakRef.get().isFinishing()) {
courses = empList;
if (empList != null) {
if (empList.size() != 0) {
courseListAdapter = new CourseListAdapter(activity,
empList);
courseListView.setAdapter(courseListAdapter);
} else {
Toast.makeText(activity, "No Course Records",
Toast.LENGTH_LONG).show();
}
}
}
}
}

/*
* This method is invoked from MainActivity onFinishDialog() method. It is
* called from CustomEmpDialogFragment when an employee record is updated.
* This is used for communicating between fragments.
*/
public void updateView() {
task = new GetEmpTask(activity);
task.execute((Void) null);
}

@Override
public void onResume() {
getActivity().setTitle("Course Schedule");
getActivity().getActionBar().setTitle("Course Schedule");
super.onResume();
}
}

//Dialog Fragment

public class CheckDialogFragment extends DialogFragment {

CourseListAdapter courseListAdapter;
CourseDAO courseDAO;

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
// TODO Auto-generated method stub
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
.setTitle("Do you want to delete?")
.setPositiveButton(android.R.string.ok,
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub

}
})
.setNegativeButton(android.R.string.cancel,
new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog,
int which) {
// TODO Auto-generated method stub
dialog.cancel();
}
});
return builder.create();
}
}

I have problems trying to get the data from onItemLongClick() of CourseListFragment to CourseListFragment. Any help would be greatly appreciated.