private void updateUI() {
// Get the collection of data from the crimelab
// singleton. The get method constructor requires that
// a context is passed in, so we send it the hosting
// activity of this fragment.
CrimeLab crimeLab = CrimeLab.get(getActivity());
// Get the actaul list of crimes from the CrimeLab class
List<Crime> crimes = crimeLab.getCrimes();
// If the adapter hasn't been created yet, we want to create it and set the Adapter for the
// Recycler view.
if (mAdapter == null) {
// Create a new crimeAdapter and send it over the list
// of crimes. Crime adapter needs the list of crimes so
// that it can work with the recyclerview to display them.
mAdapter = new CrimeAdapter(crimes);
// Take the adapter that we just created, and set it as the
// adapter that the recycler view is going to use.
mCrimeRecyclerView.setAdapter(mAdapter);
// else, the adapter already exists so we just need to notify that the data set might have
// changed. This will automatically update any data changes for us.
} else {
mAdapter.notifyDataSetChanged();
}
}
@Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
int position = info.position;
CrimeAdapter adapter = (CrimeAdapter) getListAdapter();
Crime crime = adapter.getItem(position);
switch (item.getItemId()) {
case R.id.menu_item_delete_crime:
CrimeLab.get(getActivity()).deleteCrime(crime);
adapter.notifyDataSetChanged();
return true;
}
return super.onContextItemSelected(item);
}
/** Update the list. */
private void updateUI() {
CrimeLab crimeLab = CrimeLab.getInstance(getActivity());
List<Crime> crimes = crimeLab.getCrimes();
if (mAdapter == null) {
mAdapter = new CrimeAdapter(crimes);
mRecyclerViewCrime.setAdapter(mAdapter);
} else {
// mCrimes is gone. So the List<Crime> returned by getCrimes()
// is a snapshot of the Crimes at one point in time.
// we need to update the List<Crime> in the adapter in case user has edited a crime
mAdapter.setCrimes(crimes);
mAdapter.notifyDataSetChanged();
}
// update subtitle after rotation
updateSubtitle();
}
/** Updates the Interface with all the crimes in recycler views */
private void updateUI() {
CrimeLab crimelab = CrimeLab.get(getActivity());
List<Crime> crimes = crimelab.getCrimes();
if (mAdapter == null) {
mAdapter = new CrimeAdapter(crimes);
mCrimeRecyclerView.setAdapter(mAdapter);
} else {
mAdapter.setCrimes(crimes);
if (mPreviousAdapterSelected < 0) mAdapter.notifyDataSetChanged();
else {
mAdapter.notifyItemChanged(mPreviousAdapterSelected);
mPreviousAdapterSelected = -1;
}
}
// make sure number of crimes stays up to date
updateSubtitle();
}