Android Open Source - Navigation-Drawer Main Activity

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From Project

Back to project page Navigation-Drawer.

License

The source code is released under:

MIT License

Java Source Code

package it.bellotti.navigationdrawer;
//from  w  w  w .j av  a  2  s .c  om
import android.content.res.Configuration;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.support.v7.app.ActionBarDrawerToggle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;

import it.bellotti.navigationdrawer.fragments.DraftFragment;
import it.bellotti.navigationdrawer.fragments.HomeFragment;
import it.bellotti.navigationdrawer.fragments.InboxFragment;
import it.bellotti.navigationdrawer.fragments.SentFragment;


public class MainActivity extends ActionBarActivity {


    // drawer layout
    private DrawerLayout drawerLayout;

    // drawer listview
    private ListView drawerListView;

    // slide menu items
    private String[] navMenuTitles;

    // used to store app title
    private CharSequence mTitle;

    // nav drawer title
    private CharSequence mDrawerTitle;

    // toggle that open and close the drawer
    private ActionBarDrawerToggle mDrawerToggle;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        mTitle = mDrawerTitle = getTitle();

        navMenuTitles = getResources().getStringArray(R.array.nav_drawer_items);

        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawerListView = (ListView) findViewById(R.id.left_drawer);

        // Set the adapter for the list view
        drawerListView.setAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, navMenuTitles));
        // Set the list's click listener
        drawerListView.setOnItemClickListener(new SlideMenuClickListener());

        // enabling action bar app icon and behaving it as toggle button
        getSupportActionBar().setDisplayHomeAsUpEnabled(true);
        getSupportActionBar().setHomeButtonEnabled(true);


        mDrawerToggle = new ActionBarDrawerToggle(
                this, /* Context */
                drawerLayout, /* DrawerLayout object */
                R.string.app_name, /* nav drawer open - description for accessibility */
                R.string.app_name /* nav drawer close - description for accessibility */
        );
//        {
//
//            /** Called when a drawer has settled in a completely closed state. */
//            public void onDrawerClosed(View view) {
//                setTitle(mTitle);
////                calling onPrepareOptionsMenu() to show action bar icons
//                invalidateOptionsMenu();
//            }
//
//            /** Called when a drawer has settled in a completely open state. */
//            public void onDrawerOpened(View drawerView) {
//                setTitle(mDrawerTitle);
////                calling onPrepareOptionsMenu() to hide action bar icons
//                invalidateOptionsMenu();
//            }
//        };

        // Set the drawer toggle as the DrawerListener
        drawerLayout.setDrawerListener(mDrawerToggle);

        if (savedInstanceState == null) {
//            on first time display view for first nav item
            selectFragment(0);
        }

    }

    @Override
    public void setTitle(CharSequence title) {
        mTitle = title;
        getSupportActionBar().setTitle(mTitle);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Pass the event to ActionBarDrawerToggle, if it returns
        // true, then it has handled the app icon touch event

        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }

        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }

    /***
     * Called when invalidateOptionsMenu() is triggered
     */
    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        // if nav drawer is opened, hide the action items
        boolean drawerOpen = drawerLayout.isDrawerOpen(drawerListView);
        menu.findItem(R.id.action_settings).setVisible(!drawerOpen);
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        // Sync the toggle state after onRestoreInstanceState has occurred.
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggls
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

    private class SlideMenuClickListener
            implements ListView.OnItemClickListener {

        @Override
        public void onItemClick(AdapterView parent, View view, int position, long id) {
            selectFragment(position);
        }
    }

    private void selectFragment(int position) {
        Fragment fragment = null;
        switch (position) {
            case 0:
                fragment = new HomeFragment();
                break;

            case 1:
                fragment = new InboxFragment();
                break;

            case 2:
                fragment = new SentFragment();
                break;

            case 3:
                fragment = new DraftFragment();
                break;

            default:
                break;
        }

        if (fragment != null) {
            FragmentManager fragmentManager = getSupportFragmentManager();
            fragmentManager.beginTransaction()
                    .replace(R.id.frame_container, fragment).commit();

            // update selected item and title, then close the drawer
            drawerListView.setItemChecked(position, true);
            drawerListView.setSelection(position);
            setTitle(navMenuTitles[position]);
            drawerLayout.closeDrawer(drawerListView);
        } else {
            // error in creating fragment
            Log.e("MainActivity", "Error in creating fragment");
        }

    }
}

Java Source Code List

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