Android Open Source - rhetolog Session List Fragment

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License

The source code is released under:
Copyright (c) 2012 Kirk Zurell Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Soft...
If you think the Android project rhetolog listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

package name.zurell.kirk.apps.android.rhetolog;
//from   w  ww.ja v a  2  s  . c  o  m
/*
 * Copyright (c) 2012 Kirk Zurell
 *
 * See the file LICENSE for copying permission.
 */

import android.app.Activity;
import android.database.Cursor;
import android.os.Bundle;
import android.app.FragmentTransaction;
import android.app.ListFragment;
import android.app.LoaderManager.LoaderCallbacks;
import android.content.CursorLoader;
import android.content.Intent;
import android.content.Loader;
import android.view.View;
import android.widget.ListView;
import android.widget.SimpleCursorAdapter;

public class SessionListFragment extends ListFragment implements LoaderCallbacks<Cursor> {

  
  public static final int SESSION_LIST_LOADER_ID = 213;
  
  // Name of saved state
    private static final String SESSION_FROM_SAVEDINSTANCE = "SESSIONFROMSAVEDINSTANCE";
    
    /* Dual pane operation */
    boolean mDualPane = false;
    
    /* Callbacks for listener (one or the other activity) */
    
    private Callbacks mCallbacks = sDummyCallbacks;
    
    public interface Callbacks {
      public void onInitialize(long sessId);
        public void onSessionSelected(long sessId);
    }

    private static Callbacks sDummyCallbacks = new Callbacks() {
        @Override
        public void onSessionSelected(long sessId) {
        }

    @Override
    public void onInitialize(long sessId) {
    }
    };

    
    
    
    /* Fragment's adapter */
    private SimpleCursorAdapter adapter = null; 
    
    String[] SESSIONS_LIST_PROJECTION = {
        RhetologContract.SessionsColumns._ID,
        RhetologContract.SessionsColumns.TITLE
        };
    int[] SESSIONS_LIST_FIELDS = {
        0,
        android.R.id.text1
    };

    /* (non-Javadoc)
   * @see android.app.Fragment#onActivityCreated(android.os.Bundle)
   */
  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);

    
    // Set up adapter for cursor returned by loader.    
    adapter = new SimpleCursorAdapter(getActivity(), 
        android.R.layout.simple_list_item_activated_1, 
        null /* TBA */, 
        SESSIONS_LIST_PROJECTION, 
        SESSIONS_LIST_FIELDS, 
        0);
    setListAdapter(adapter);
        
    // Get the cursor at leisure.
    // Better restarted at onResume, permits recovery after sleep.
    //getActivity().getLoaderManager().initLoader(SESSION_LIST_LOADER_ID, null, this);
    
  }
  
  
  
  /* (non-Javadoc)
   * @see android.app.Fragment#onResume()
   */
  @Override
  public void onResume() {
    getActivity().getLoaderManager().restartLoader(SESSION_LIST_LOADER_ID, null, this);
    super.onResume();
  }

  
  /* (non-Javadoc)
   * @see android.app.Fragment#onStop()
   */
  @Override
  public void onStop() {
    setListShown(false);
    super.onStop();
  }





  @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        
        try {
          mCallbacks = (Callbacks) activity;
    } catch (Exception e) {
      throw new IllegalStateException("Activity must implement fragment's callbacks.");
      }
        
  }

  
    @Override
    public void onDetach() {
        super.onDetach();
        mCallbacks = sDummyCallbacks;
    }

    
    
    @Override
    public void onListItemClick(ListView listView, View view, int position, long id) {
        super.onListItemClick(listView, view, position, id);
        
        // Activity shows details as possible.
        mCallbacks.onSessionSelected(id);
        
    }

    
    public void setActivateOnItemClick(boolean activateOnItemClick) {
        getListView().setChoiceMode(activateOnItemClick
                ? ListView.CHOICE_MODE_SINGLE
                : ListView.CHOICE_MODE_NONE);
    }

    
    
    
    
    

  @Override
  public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) {
    CursorLoader sessionListLoader = null;
    
    switch(arg0) {
    case SESSION_LIST_LOADER_ID:
      sessionListLoader = new CursorLoader(getActivity(), 
          RhetologContract.SESSIONS_URI, 
          SESSIONS_LIST_PROJECTION, 
          null, null, null);
      break;
    }
    
    return sessionListLoader;
  }

  @Override
  public void onLoadFinished(Loader<Cursor> arg0, Cursor arg1) {
    
    int loaderID = arg0.getId();
    
    switch(loaderID) {
    
    case SESSION_LIST_LOADER_ID:
      //adapter.swapCursor(arg1);
      adapter.changeCursor(arg1);
      setListShown(true);
      
      Bundle selSessBundle = getActivity().getContentResolver().call(RhetologContract.PROVIDER_URI, "getCurrentSession", null, null);
      long selectedSessionId = selSessBundle.getLong(RhetologContentProvider.CURRENTSESSIONEXTRA);

      mCallbacks.onInitialize(selectedSessionId);
      break;
    }
    
    
    
  }

  @Override
  public void onLoaderReset(Loader<Cursor> arg0) {
    
    int loaderID = arg0.getId();
    
    switch (loaderID) {
    case SESSION_LIST_LOADER_ID:
      //adapter.swapCursor(null);
      adapter.changeCursor(null);
      // List setListShown(false) in onStop, this reset happens later than list exists.
      if (mDualPane) {
        getListView().clearChoices();
      }
      break;

    default:
      break;
    }
    
    
  }
}
Java Source Code List
