Java tutorial
/* * 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, * 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.nau.CS477.Classes; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.content.res.Configuration; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import com.example.android.navigationdrawerexample.R; import edu.nau.CS477.Contacts.ContactObject; import edu.nau.CS477.Fragments.ChatFragment; import edu.nau.CS477.Fragments.ContactsFragment; import edu.nau.CS477.Fragments.FTPTransferFragment; import edu.nau.CS477.Fragments.FileBrowserFragment; import edu.nau.CS477.Fragments.SettingsFragment; public class MainActivity extends Activity { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mMenuItems; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ContactsDatabaseHandler contactDB = new ContactsDatabaseHandler(this); ChatsDatabaseHandler chatDB = new ChatsDatabaseHandler(this); /** * CRUD Operations * */ // Inserting Contacts if (contactDB.getAllContacts().size() == 0) { Log.d("Insert: ", "Inserting .."); contactDB.addContact(new ContactObject("JD", "Knapp", "jdk85@nau.edu")); contactDB.addContact(new ContactObject("Ben", "Olayinka", "bo97@nau.edu")); contactDB.addContact(new ContactObject("Brandon", "Phillips", "bmp57@nau.edu")); contactDB.addContact(new ContactObject("Mike", "Stek", "mikestek@nau.edu")); } else { //Log.d("INSERT: ", "Not performed, DB is populated"); } /* // How to read contacts and print to log Log.d("Reading: ", "Reading all contacts.."); ArrayList<ContactObject> contacts = contactDB.getAllContacts(); for (ContactObject cn : contacts) { String log = "Id: "+cn.getId()+" ,Name: " + cn.getFullName() + " ,Email: " + cn.getEmailAddr(); // Writing Contacts to Log.d("Name: ", log); } */ contactDB.close(); mTitle = mDrawerTitle = getTitle(); mMenuItems = getResources().getStringArray(R.array.main_navigation_menu); 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, mMenuItems)); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); // 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 */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.main, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onPrepareOptionsMenu(Menu menu) { return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } return super.onOptionsItemSelected(item); } /* The click listner for ListView in the navigation drawer */ private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { selectItem(position); } } private void selectItem(int position) { Bundle args = new Bundle(); Fragment fragment = null; switch (position) { case 0: fragment = new ContactsFragment(); args.putInt(ContactsFragment.MENU_ITEM_NUMBER, position); fragment.setArguments(args); break; case 1: fragment = new ChatFragment(); args.putInt(ChatFragment.MENU_ITEM_NUMBER, position); fragment.setArguments(args); break; case 2: fragment = new FileBrowserFragment(); args.putInt(FileBrowserFragment.MENU_ITEM_NUMBER, position); fragment.setArguments(args); break; case 3: fragment = new FTPTransferFragment(); args.putInt(FTPTransferFragment.MENU_ITEM_NUMBER, position); fragment.setArguments(args); break; case 4: fragment = new SettingsFragment(); args.putInt(SettingsFragment.MENU_ITEM_NUMBER, position); fragment.setArguments(args); break; default: break; } if (fragment != null) { 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); mDrawerList.setSelection(position); setTitle(mMenuItems[position]); mDrawerLayout.closeDrawer(mDrawerList); } else { // error in creating fragment Log.e("MainActivity", "Error in creating fragment"); } } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); } /** * When using the ActionBarDrawerToggle, you must call it during * onPostCreate() and onConfigurationChanged()... */ @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 toggles mDrawerToggle.onConfigurationChanged(newConfig); } }