background image

    private String[] mPlanetTitles;
    private DrawerLayout mDrawerLayout;
    private ActionBarDrawerToggle mDrawerToggle;
    private ListView mDrawerList;

    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_hello_drawer);

        mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        // init the ListView and Adapter, nothing new
        initListView();

        // set a custom shadow that overlays the main content when the drawer
        // opens
        mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
                GravityCompat.START);

        mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
                R.drawable.ic_drawer, R.string.drawer_open,
                R.string.drawer_close)
        {

            /** Called when a drawer has settled in a completely closed state. */
            public void onDrawerClosed(View view)
            {

                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }

            /** Called when a drawer has settled in a completely open state. */
            public void onDrawerOpened(View drawerView)
            {

                invalidateOptionsMenu(); // creates call to
                                            // onPrepareOptionsMenu()
            }
        };

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