Android Open Source - coursera-android-001 Friends Fragment

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License

The source code is released under:

MIT License

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Java Source Code

package course.labs.fragmentslab;
/*  w w  w.j  a va  2  s  .  co  m*/
import android.app.Activity;
import android.app.ListFragment;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class FriendsFragment extends ListFragment {

  private static final String[] FRIENDS = { "ladygaga", "msrebeccablack",
      "taylorswift13" };
  private static final String TAG = "Lab-Fragments";

  public interface SelectionListener {
    public void onItemSelected(int position);
  }

  private SelectionListener mCallback;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // use different layout definition, depending on whether device is pre-
    // or post-honeycomb

    int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ? android.R.layout.simple_list_item_activated_1
        : android.R.layout.simple_list_item_1;

    // Set the list adapter for this ListFragment
    setListAdapter(new ArrayAdapter<String>(getActivity(), layout, FRIENDS));
  }

    
  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);

    // Make sure that the hosting Activity has implemented
    // the SelectionListener callback interface. We need this
    // because when an item in this ListFragment is selected, 
    // the hosting Activity's onItemSelected() method will be called.
    
    try {

      mCallback = (SelectionListener) activity;

    } catch (ClassCastException e) {
      throw new ClassCastException(activity.toString()
          + " must implement SelectionListener");
    }
  }

  // Note: ListFragments come with a default onCreateView() method.
  // For other Fragments you'll normally implement this method.
  //   @Override
  //  public View onCreateView(LayoutInflater inflater, ViewGroup container,
  //    Bundle savedInstanceState)

  
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    Log.i(TAG, "Entered onActivityCreated()");

    // When using two-pane layout, configure the ListView to highlight the
    // selected list item
    
    if (isInTwoPaneMode()) {

      getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);

    }

  }

  @Override
  public void onListItemClick(ListView l, View view, int position, long id) {

    // Notify the hosting Activity that a selection has been made.

    mCallback.onItemSelected(position);

  }

  // If there is a FeedFragment, then the layout is two-pane 
  private boolean isInTwoPaneMode() {

    return getFragmentManager().findFragmentById(R.id.feed_frag) != null;

  }

}

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