* Copyright 2013 The Android Open Source Project
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package edu.cs4730.navdrawer;

import java.util.Locale;

import android.app.Fragment;
import android.app.FragmentManager;
import android.app.SearchManager;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
//import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.widget.Toolbar;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.Toast;

 * This example illustrates a common usage of the DrawerLayout widget
 * in the Android support library.  This is google's example from their web site 
 * http://developer.android.com/training/implementing-navigation/nav-drawer.html with modifications for lollipop ish code.
 * Note, this updates below are true for just API 21 (lollipop), you must use the support libraries.
 *   This was test with on several different nag drawer examples, these seem to be all the fixes so far.
 * Updated 10/18/2014 for the new <- in the navigation drawer used in the v7 support library.
 *     add the support library v7 and then change to this import android.support.v7.app.ActionBarDrawerToggle;
 * Update 10/21/2014    
 *   To remove the icon as well, then you need to change from an Activity to an ActionBarActivity    
 *    add this:
 *       import android.support.v7.app.ActionBarActivity;
 *             change extends Activity to extends ActionBarActivity
 *	      Now change every getActionBar() reference to a getSupportActionBar()
 *    remove the import for activity if you want to.
 *    values/styles.xml  Theme.AppCompat.Light
 *    values-v11/styles.xml Theme.AppCompat.Light
 *    values-v14/styles.xml Theme.AppCompat.Light.DarkActionBar
 *    Not needed in this code, but in others
 *    Replace import android.app.ActionBar;
 *    with    import android.support.v7.app.ActionBar;
 *    if you are in a fragment, you may have to write this ugly line of code:
 *    ((ActionBarActivity) getActivity()).getSupportActionBar();
 * <p/>
 * <p>When a navigation (left) drawer is present, the host activity should detect presses of
 * the action bar's Up affordance as a signal to open and close the navigation drawer. The
 * ActionBarDrawerToggle facilitates this behavior.
 * Items within the drawer should fall into one of two categories:</p>
 * <p/>
 * <ul>
 * <li><strong>View switches</strong>. A view switch follows the same basic policies as
 * list or tab navigation in that a view switch does not create navigation history.
 * This pattern should only be used at the root activity of a task, leaving some form
 * of Up navigation active for activities further down the navigation hierarchy.</li>
 * <li><strong>Selective Up</strong>. The drawer allows the user to choose an alternate
 * parent for Up navigation. This allows a user to jump across an app's navigation
 * hierarchy at will. The application should treat this as it treats Up navigation from
 * a different task, replacing the current task stack using TaskStackBuilder or similar.
 * This is the only form of navigation drawer that should be used outside of the root
 * activity of a task.</li>
 * </ul>
 * <p/>
 * <p>Right side drawers should be used for actions, not navigation. This follows the pattern
 * established by the Action Bar that navigation should be to the left and actions to the right.
 * An action should be an operation performed on the current contents of the window,
 * for example enabling or disabling a data overlay on top of the current content.</p>
public class MainActivity extends ActionBarActivity {
    private DrawerLayout mDrawerLayout;
    private ListView mDrawerList;
    private ActionBarDrawerToggle mDrawerToggle;

    private CharSequence mDrawerTitle;
    private CharSequence mTitle;
    private String[] mPlanetTitles;

    protected void onCreate(Bundle savedInstanceState) {
        mTitle = mDrawerTitle = getTitle();
        mPlanetTitles = getResources().getStringArray(R.array.planets_array);
        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        mDrawerList = (ListView) findViewById(R.id.left_drawer);

        // set a custom shadow that overlays the main content when the drawer opens
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
        // set up the drawer's list view with items and click listener
        mDrawerList.setAdapter(new ArrayAdapter<String>(this,
                R.layout.drawer_list_item, mPlanetTitles));
        mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

        // enable ActionBar app icon to behave as action to toggle nav drawer

        // ActionBarDrawerToggle ties together the the proper interactions
        // between the sliding drawer and the action bar app icon
        mDrawerToggle = new ActionBarDrawerToggle(
                this,                  /* host Activity */
                mDrawerLayout,         /* DrawerLayout object */
               // R.drawable.ic_drawer,  /* nav drawer image to replace 'Up' caret */  //no in the v7 constructor, so commented out.
                R.string.drawer_open,  /* "open drawer" description for accessibility */
                R.string.drawer_close  /* "close drawer" description for accessibility */
                ) {
            public void onDrawerClosed(View view) {
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()

            public void onDrawerOpened(View drawerView) {
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()

        if (savedInstanceState == null) {

    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main, menu);
        return super.onCreateOptionsMenu(menu);

    /* Called whenever we call invalidateOptionsMenu() */
    public boolean onPrepareOptionsMenu(Menu menu) {
        // If the nav drawer is open, hide action items related to the content view
        boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
        return super.onPrepareOptionsMenu(menu);

    public boolean onOptionsItemSelected(MenuItem item) {
         // The action bar home/up action should open or close the drawer.
         // ActionBarDrawerToggle will take care of this.
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        // Handle action buttons
        switch(item.getItemId()) {
        case R.id.action_websearch:
            // create intent to perform web search for this planet
            Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
            intent.putExtra(SearchManager.QUERY, getSupportActionBar().getTitle());
            // catch event that there's no activity to handle intent
            if (intent.resolveActivity(getPackageManager()) != null) {
            } else {
                Toast.makeText(this, R.string.app_not_available, Toast.LENGTH_LONG).show();
            return true;
            return super.onOptionsItemSelected(item);

    /* The click listner for ListView in the navigation drawer */
    private class DrawerItemClickListener implements ListView.OnItemClickListener {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

    private void selectItem(int position) {
        // update the main content by replacing fragments
        Fragment fragment = new PlanetFragment();
        Bundle args = new Bundle();
        args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);

        FragmentManager fragmentManager = getFragmentManager();
        fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

        // update selected item and title, then close the drawer
        mDrawerList.setItemChecked(position, true);

    public void setTitle(CharSequence title) {
        mTitle = title;

     * When using the ActionBarDrawerToggle, you must call it during
     * onPostCreate() and onConfigurationChanged()...

    protected void onPostCreate(Bundle savedInstanceState) {
        // Sync the toggle state after onRestoreInstanceState has occurred.

    public void onConfigurationChanged(Configuration newConfig) {
        // Pass any configuration change to the drawer toggls

     * Fragment that appears in the "content_frame", shows a planet
    public static class PlanetFragment extends Fragment {
        public static final String ARG_PLANET_NUMBER = "planet_number";

        public PlanetFragment() {
            // Empty constructor required for fragment subclasses

        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_planet, container, false);
            int i = getArguments().getInt(ARG_PLANET_NUMBER);
            String planet = getResources().getStringArray(R.array.planets_array)[i];

            int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()),
                            "drawable", getActivity().getPackageName());
            ((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
            return rootView;