@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);
  }
  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();
    }
  }
  /** 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();
  }
Exemplo n.º 5
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  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.notifyItemChanged(mCrimePosition);
    }
  }