BulbListFragment.java

package com.kuxhausen.huemore;

import android.database.Cursor;
import android.os.Bundle;
import android.provider.BaseColumns;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.ContextMenu;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.TextView;

import com.kuxhausen.huemore.persistence.Definitions;
import com.kuxhausen.huemore.persistence.Definitions.InternalArguments;
import com.kuxhausen.huemore.persistence.Definitions.NetBulbColumns;
import com.kuxhausen.huemore.state.Group;
import com.kuxhausen.huemore.state.SyntheticGroup;

import java.util.ArrayList;

public class BulbListFragment extends ListFragment
    implements LoaderManager.LoaderCallbacks<Cursor>, SelectableList {

  private static final int BULBS_LOADER = 0;
  private static final String[] columns = {NetBulbColumns.NAME_COLUMN,
                                           NetBulbColumns.DEVICE_ID_COLUMN, BaseColumns._ID};

  private CursorAdapter mDataSource;
  private TextView mSelected, mLongSelected; // updated on long click
  private int mSelectedPos = -1;
  private NavigationDrawerActivity mParent;

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
                           Bundle savedInstanceState) {
    mParent = (NavigationDrawerActivity) getActivity();

    int layout = android.R.layout.simple_list_item_activated_1;

    getLoaderManager().initLoader(BULBS_LOADER, null, this);

    mDataSource =
        new SimpleCursorAdapter(getActivity(), layout, null, columns,
                                new int[]{android.R.id.text1}, 0);

    setListAdapter(mDataSource);

    // Inflate the layout for this fragment
    View myView = inflater.inflate(R.layout.bulb_view, null);

    return myView;
  }

  @Override
  public void onStart() {
    super.onStart();
    getListView().setChoiceMode(AbsListView.CHOICE_MODE_SINGLE);
    mParent.trackSelectableList(this);
  }

  @Override
  public void onStop() {
    super.onStop();
    mParent.forgetSelectableList(this);
  }

  public void invalidateSelection() {
    // Set the previous selected item as checked to be unhighlighted when in
    // two-pane layout
    if (mSelected != null && mSelectedPos > -1) {
      getListView().setItemChecked(mSelectedPos, false);
    }
  }

  @Override
  public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
    super.onCreateContextMenu(menu, v, menuInfo);

    mLongSelected = (TextView) ((AdapterView.AdapterContextMenuInfo) menuInfo).targetView;

    android.view.MenuInflater inflater = this.getActivity().getMenuInflater();
    inflater.inflate(R.menu.context_bulb, menu);
  }

  @Override
  public boolean onContextItemSelected(android.view.MenuItem item) {

    if (mLongSelected == null) {
      return false;
    }

    switch (item.getItemId()) {

      case R.id.contextgroupmenu_rename: // <-- your custom menu item id here
        AdapterView.AdapterContextMenuInfo info =
            (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();

        EditBulbDialogFragment ngdf = new EditBulbDialogFragment();
        Bundle args = new Bundle();
        args.putLong(InternalArguments.NET_BULB_DATABASE_ID, info.id);
        ngdf.setArguments(args);
        ngdf.show(getFragmentManager(), InternalArguments.FRAG_MANAGER_DIALOG_TAG);

      default:
        return super.onContextItemSelected(item);
    }
  }

  @Override
  public void onListItemClick(ListView l, View v, int position, long id) {
    mSelected = ((TextView) (v));
    mSelectedPos = position;

    ArrayList<Long> bulbIds = new ArrayList<Long>();
    bulbIds.add(mDataSource.getItemId(position));
    Group g = new SyntheticGroup(bulbIds, mSelected.getText().toString());
    mParent.setGroup(g, this);

    // Set the item as checked to be highlighted when in two-pane layout
    getListView().setItemChecked(mSelectedPos, true);
  }

  @Override
  public Loader<Cursor> onCreateLoader(int loaderID, Bundle arg1) {
    /*
     * Takes action based on the ID of the Loader that's being created
     */
    switch (loaderID) {
      case BULBS_LOADER:
        // Returns a new CursorLoader
        return new CursorLoader(getActivity(), // Parent activity context
                                Definitions.NetBulbColumns.URI, // Table
                                columns, // Projection to return
                                null, // No selection clause
                                null, // No selection arguments
                                null // Default sort order
        );
      default:
        // An invalid id was passed in
        return null;
    }
  }

  @Override
  public void onLoadFinished(Loader<Cursor> arg0, Cursor cursor) {
    /*
     * Moves the query results into the adapter, causing the ListView fronting this adapter to
     * re-display
     */
    mDataSource.changeCursor(cursor);
    registerForContextMenu(getListView());
  }

  @Override
  public void onLoaderReset(Loader<Cursor> arg0) {
    /*
     * Clears out the adapter's reference to the Cursor. This prevents memory leaks.
     */
    // unregisterForContextMenu(getListView());
    mDataSource.changeCursor(null);
  }
}