Android Open Source - Race2GED2 Navigation Drawer Fragment






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The source code is released under:

Apache License Version 2.0, January 2004 http://www.apache.org/licenses/ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 1. Def...

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Java Source Code

/*
 * Copyright 2014 Regional Adult Education Program of Lee, Scott, Wise, and Norton Public Schools
 */* w ww  .  j  a  v  a  2s  .c om*/
 *    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,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package edu.mecc.race2ged.navigation;

import android.app.Activity;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import android.content.res.TypedArray;
import android.os.Bundle;
import android.preference.PreferenceManager;
import android.support.v4.app.Fragment;
import android.support.v4.view.GravityCompat;
import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
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.ListView;
import android.widget.TextView;

import edu.mecc.race2ged.R;
import edu.mecc.race2ged.helpers.Utils;

/**
 * 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_LEARNED_DRAWER = "navigation_drawer_learned";

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

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

    private DrawerLayout mDrawerLayout;
    private ListView mDrawerListView;
    private View mFragmentContainerView;

    private int mCurrentSelectedPosition = 0;
    private boolean mFromSavedInstanceState;
    private boolean mUserLearnedDrawer;
    private View mPreviouslySelectedView = null;



    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_LEARNED_DRAWER for details.
        SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
        mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);

        if (savedInstanceState != null) {
            mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
            mFromSavedInstanceState = true;
        }

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


        // 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) {
        View mDrawerView = inflater.inflate(R.layout.side_panel_list, container, false);
        mDrawerListView = (ListView) mDrawerView.findViewById(R.id.side_panel_list_view);


        mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                if (mPreviouslySelectedView != null)
                    Utils.setRobotoThin(getActivity(), ((TextView) mPreviouslySelectedView.findViewById(R.id.text)));
                mPreviouslySelectedView = view;
               // Utils.setRobotoBold(getActivity(), ((TextView) view.findViewById(R.id.text)));
                selectItem(position);
            }
        });

        NavDrawerListAdapter adapter = new NavDrawerListAdapter(getActivity().getBaseContext());
        String[] mPrimaryNavItems = getResources().getStringArray(R.array.navPrimaryTitles);
        String[] mSecondaryNavItems = getResources().getStringArray(R.array.navSecondaryTitles);
        TypedArray mNavIcons = getResources().obtainTypedArray(R.array.navSecondaryTitlesIcons);

        adapter.populate(R.id.text, mPrimaryNavItems, mSecondaryNavItems, mNavIcons);

        mNavIcons.recycle();

        mDrawerListView.setAdapter(adapter);
        mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
        return mDrawerView;
    }

    public boolean isDrawerOpen() {
        return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
    }

    /**
     * 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) {
        mFragmentContainerView = getActivity().findViewById(fragmentId);
        mDrawerLayout = drawerLayout;

        // 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

        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.
        mDrawerToggle = new ActionBarDrawerToggle(
                getActivity(),                    /* host Activity */
                mDrawerLayout,                    /* 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().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
            }

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

                if (!mUserLearnedDrawer) {
                    // The user manually opened the drawer; store this flag to prevent auto-showing
                    // the navigation drawer automatically in the future.
                    mUserLearnedDrawer = true;
                    SharedPreferences sp = PreferenceManager
                            .getDefaultSharedPreferences(getActivity());
                    sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).commit();
                }

                getActivity().supportInvalidateOptionsMenu(); // 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 (!mUserLearnedDrawer && !mFromSavedInstanceState) {

            mDrawerLayout.postDelayed(new Runnable() {
                @Override
                public void run() {
                    mDrawerLayout.openDrawer(mFragmentContainerView);
                }
            }, 500);
        }

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

        mDrawerLayout.setDrawerListener(mDrawerToggle);
    }

    private void selectItem(int position) {
        if (position != mCurrentSelectedPosition) {
            mCurrentSelectedPosition = position;
            if (mDrawerListView != null) {
                mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
            }
            if (mDrawerLayout != null) {
                mDrawerLayout.closeDrawer(mFragmentContainerView);
            }
            if (mCallbacks != null) {
                mCallbacks.onNavigationDrawerItemSelected(position);
            }
        }
    }

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

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

    @Override
    public void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
    }

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

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        // If the drawer is open, show the global app actions in the action bar. See also
        // showGlobalContextActionBar, which controls the top-left area of the action bar.
        if (mDrawerLayout != null && isDrawerOpen()) {
           // inflater.inflate(R.menu.global, menu);
            showGlobalContextActionBar();
        }
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /**
     * Per the navigation drawer design guidelines, updates the action bar to show the global app
     * 'context', rather than just what's in the current screen.
     */
    private void showGlobalContextActionBar() {
        ActionBar actionBar = getActionBar();
        actionBar.setDisplayShowTitleEnabled(true);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
        actionBar.setTitle(R.string.app_name);
    }

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

    /**
     * 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

edu.mecc.race2ged.GEDApplication.java
edu.mecc.race2ged.JSON.Class.java
edu.mecc.race2ged.JSON.County.java
edu.mecc.race2ged.JSON.Instructor.java
edu.mecc.race2ged.JSON.Region.java
edu.mecc.race2ged.JSON.State.java
edu.mecc.race2ged.activities.HomeActivity.java
edu.mecc.race2ged.activities.SettingsActivity.java
edu.mecc.race2ged.activities.SplashScreen.java
edu.mecc.race2ged.adapters.CardAdapter.java
edu.mecc.race2ged.adapters.ClassViewPagerAdapter.java
edu.mecc.race2ged.cards.ClassCard.java
edu.mecc.race2ged.cards.ExpandableCard.java
edu.mecc.race2ged.cards.StubCard.java
edu.mecc.race2ged.fragments.CardListFragment.java
edu.mecc.race2ged.fragments.ClassCardListFragment.java
edu.mecc.race2ged.fragments.ClassViewPagerFragment.java
edu.mecc.race2ged.helpers.ClassDataReader.java
edu.mecc.race2ged.helpers.ClassDataUpdater.java
edu.mecc.race2ged.helpers.SettingsHelper.java
edu.mecc.race2ged.helpers.Utils.java
edu.mecc.race2ged.navigation.ActionBarDrawerToggleHoneycomb.java
edu.mecc.race2ged.navigation.ActionBarDrawerToggle.java
edu.mecc.race2ged.navigation.DrawerLayout.java
edu.mecc.race2ged.navigation.NavDrawerListAdapter.java
edu.mecc.race2ged.navigation.NavDrawerListItemNoIcon.java
edu.mecc.race2ged.navigation.NavDrawerListItemWithIcon.java
edu.mecc.race2ged.navigation.NavDrawerListItem.java
edu.mecc.race2ged.navigation.NavigationDrawerFragment.java
edu.mecc.race2ged.widgets.Card.java
edu.mecc.race2ged.widgets.Header.java