Android Open Source - Geotrackin Navigation Drawer Fragment

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License

The source code is released under:
GNU General Public License
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Java Source Code

/*******************************************************************************
 * This file is part of GPSLogger for Android.
 */*from  w  w  w . ja  v  a  2s. c  om*/
 * GPSLogger for Android is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * GPSLogger for Android is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GPSLogger for Android.  If not, see <http://www.gnu.org/licenses/>.
 ******************************************************************************/

package com.geotrackin.gpslogger;

import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.view.LayoutInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import java.util.ArrayList;

;

/**
 * Fragment used for managing interactions for and presentation of a navigation drawer.
 * See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction">
 * design guidelines</a> for a complete explanation of the behaviors implemented here.
 */
public class NavigationDrawerFragment extends Fragment {

    /**
     * Remember the position of the selected item.
     */
    private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";

    /**
     * Per the design guidelines, you should show the drawer on launch until the user manually
     * expands it. This shared preference tracks this.
     */
    private static final String PREF_USER_SEEN_DRAWER = "navigation_drawer_learned";

    /**
     * A pointer to the current callbacks instance (the Activity).
     */
    private NavigationDrawerCallbacks navigationDrawerCallbacks;

    /**
     * Helper component that ties the action bar to the navigation drawer.
     */
    private ActionBarDrawerToggle actionBarDrawerToggle;

    private DrawerLayout drawerLayout;
    private ListView drawerListView;
    private View fragmentContainerView;

    private int currentSelectedPosition = 0;
    private boolean fromSavedInstanceState;
    private boolean userHasSeenDrawer;

    public NavigationDrawerFragment() {
    }

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

        // Read in the flag indicating whether or not the user has demonstrated awareness of the
        // drawer. See PREF_USER_SEEN_DRAWER for details.
        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
        userHasSeenDrawer = sp.getBoolean(PREF_USER_SEEN_DRAWER, false);

        if (savedInstanceState != null) {
            currentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
            fromSavedInstanceState = true;
        }

        // Select either the default item (0) or the last selected item.
        //selectItem(currentSelectedPosition);
        selectItem(0);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        // Indicate that this fragment would like to influence the set of actions in the action bar.
        setHasOptionsMenu(true);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        drawerListView = (ListView) inflater.inflate(
                R.layout.fragment_navigation_drawer, container, false);
        drawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                selectItem(position);
            }
        });

        ArrayList<String> drawerMenuItems = new ArrayList<String>();

        drawerMenuItems.add(getString(R.string.title_drawer_headsettings));
        drawerMenuItems.add(getString(R.string.title_drawer_generalsettings));
        drawerMenuItems.add(getString(R.string.title_drawer_loggingsettings));
        //drawerMenuItems.add(getString(R.string.title_drawer_uploadsettings));

//        drawerMenuItems.add("    " + getString(R.string.autoftp_setup_title)); f73

//        drawerMenuItems.add("    " + getString(R.string.autoemail_title));

//        drawerMenuItems.add("    " + getString(R.string.opengts_setup_title));

//        drawerMenuItems.add("    " + getString(R.string.gdocs_setup_title));

//        drawerMenuItems.add("    " + getString(R.string.osm_setup_title));

//        drawerMenuItems.add("    " + getString(R.string.dropbox_setup_title));


//        drawerMenuItems.add(getString(R.string.menu_exit));


        drawerListView.setAdapter(new ArrayAdapter<String>(
                getActionBar().getThemedContext(),
                android.R.layout.simple_list_item_activated_1,
                android.R.id.text1,
                drawerMenuItems.toArray(new String[0])
        ));
        drawerListView.setItemChecked(currentSelectedPosition, true);
        return drawerListView;
    }

    public boolean isDrawerOpen() {
        return drawerLayout != null && drawerLayout.isDrawerOpen(fragmentContainerView);
    }

    /**
     * Users of this fragment must call this method to set up the navigation drawer interactions.
     *
     * @param fragmentId   The android:id of this fragment in its activity's layout.
     * @param drawerLayout The DrawerLayout containing this fragment's UI.
     */
    public void setUp(int fragmentId, DrawerLayout drawerLayout) {
        fragmentContainerView = getActivity().findViewById(fragmentId);
        this.drawerLayout = drawerLayout;

        // set a custom shadow that overlays the main content when the drawer opens
        this.drawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
        // set up the drawer's list view with items and click listener

        ActionBar actionBar = getActionBar();
        actionBar.setDisplayHomeAsUpEnabled(true);
        actionBar.setHomeButtonEnabled(true);

        // ActionBarDrawerToggle ties together the the proper interactions
        // between the navigation drawer and the action bar app icon.
        actionBarDrawerToggle = new ActionBarDrawerToggle(
                getActivity(),                    /* host Activity */
                NavigationDrawerFragment.this.drawerLayout,                    /* DrawerLayout object */
                R.drawable.ic_drawer,             /* nav drawer image to replace 'Up' caret */
                R.string.navigation_drawer_open,  /* "open drawer" description for accessibility */
                R.string.navigation_drawer_close  /* "close drawer" description for accessibility */
        ) {
            @Override
            public void onDrawerClosed(View drawerView) {
                super.onDrawerClosed(drawerView);
                if (!isAdded()) {
                    return;
                }

                getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
            }

            @Override
            public void onDrawerOpened(View drawerView) {
                super.onDrawerOpened(drawerView);
                if (!isAdded()) {
                    return;
                }

                getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu()
            }
        };

        // If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
        // per the navigation drawer design guidelines.
        if (!userHasSeenDrawer && !fromSavedInstanceState) {
            this.drawerLayout.openDrawer(fragmentContainerView);
            SharedPreferences sp = PreferenceManager
                    .getDefaultSharedPreferences(getActivity());
            sp.edit().putBoolean(PREF_USER_SEEN_DRAWER, true).apply();
        }

        // Defer code dependent on restoration of previous instance state.
        this.drawerLayout.post(new Runnable() {
            @Override
            public void run() {
                actionBarDrawerToggle.syncState();
            }
        });

        this.drawerLayout.setDrawerListener(actionBarDrawerToggle);
    }

    public void toggleDrawer() {
        if (isDrawerOpen()) {
            drawerLayout.closeDrawer(fragmentContainerView);
        } else {
            drawerLayout.openDrawer(fragmentContainerView);
        }

    }

    private void selectItem(int position) {
        currentSelectedPosition = position;
        if (drawerListView != null) {
            drawerListView.setItemChecked(position, true);
        }
        if (drawerLayout != null) {
            drawerLayout.closeDrawer(fragmentContainerView);
        }
        if (navigationDrawerCallbacks != null) {
            navigationDrawerCallbacks.onNavigationDrawerItemSelected(position);
        }
    }

    @Override
    public void onAttach(Activity activity) {
        super.onAttach(activity);
        try {
            navigationDrawerCallbacks = (NavigationDrawerCallbacks) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        navigationDrawerCallbacks = null;
    }

    @Override
    public void onSaveInstanceState(Bundle outState) {
        //Bug: http://stackoverflow.com/questions/7575921/illegalstateexception-can-not-perform-this-action-after-onsaveinstancestate-h
        outState.putInt(STATE_SELECTED_POSITION, currentSelectedPosition);
        super.onSaveInstanceState(outState);

    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Forward the new configuration the drawer toggle component.
        actionBarDrawerToggle.onConfigurationChanged(newConfig);
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        //Required to show the left drawer
        if (actionBarDrawerToggle != null && actionBarDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


    private ActionBar getActionBar() {
        return getActivity().getActionBar();
    }

    /**
     * Callbacks interface that all activities using this fragment must implement.
     */
    public static interface NavigationDrawerCallbacks {
        /**
         * Called when an item in the navigation drawer is selected.
         */
        void onNavigationDrawerItemSelected(int position);
    }
}
Java Source Code List
