Java tutorial
package edu.jcu.cs470.togenda; //AOSP code is for basic implementation for Navigation Drawer //Advanced themeing and style was not included. /* * 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. */ import java.util.ArrayList; import java.util.List; import com.squareup.timessquare.CalendarPickerView; import android.app.AlertDialog; import android.app.Fragment; import android.app.FragmentTransaction; import android.content.Intent; import android.content.res.Configuration; import android.content.res.TypedArray; import android.graphics.Typeface; import android.graphics.drawable.Drawable; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.app.FragmentActivity; 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.ListView; import android.widget.TextView; /** * This example illustrates a common usage of the DrawerLayout widget * in the Android support library. * <p/> * <p>When a navigation (left) drawer is present, the host activity should detect presses of * the action bar's Up affordance as a signal to open and close the navigation drawer. The * ActionBarDrawerToggle facilitates this behavior. * Items within the drawer should fall into one of two categories:</p> * <p/> * <ul> * <li><strong>View switches</strong>. A view switch follows the same basic policies as * list or tab navigation in that a view switch does not create navigation history. * This pattern should only be used at the root activity of a task, leaving some form * of Up navigation active for activities further down the navigation hierarchy.</li> * <li><strong>Selective Up</strong>. The drawer allows the user to choose an alternate * parent for Up navigation. This allows a user to jump across an app's navigation * hierarchy at will. The application should treat this as it treats Up navigation from * a different task, replacing the current task stack using TaskStackBuilder or similar. * This is the only form of navigation drawer that should be used outside of the root * activity of a task.</li> * </ul> * <p/> * <p>Right side drawers should be used for actions, not navigation. This follows the pattern * established by the Action Bar that navigation should be to the left and actions to the right. * An action should be an operation performed on the current contents of the window, * for example enabling or disabling a data overlay on top of the current content.</p> */ //Main Class //Handles drawer opening and closing. Selecting from Drawer, and switching between fragments public class MainActivity extends FragmentActivity { private DrawerLayout mDrawerLayout; //Layout of Navigation Drawer private ListView mDrawerList; //List view in DrawerLayout private ActionBarDrawerToggle mDrawerToggle; //Toggles the Drawer Open and Close. //For task card Dialog public Drawable backgroundColor; public AlertDialog alertDialog; //Navigation Drawer and Action Bar labels public int gPosition = 0; //Current Positions in NavBar list. private CharSequence mDrawerTitle; public CharSequence mTitle; private String[] pageList; //Array private List<RowItem> rowItems; //Of navigation drawer items private NavListAdapter adapter; //Creates rowitems String[] menutitles; //of menu icons TypedArray menuIcons; //Icons for nav drawer list //Font faces. public Typeface robotoLight; public Typeface robotoBold; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Log.d("MainActivity", "onCreate"); mTitle = mDrawerTitle = getTitle(); //Actionbar text //NavDrawer stuff pageList = getResources().getStringArray(R.array.navItemList); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); //These fonts are built into android 4.4 //We include them in our assets for devices running below that. robotoLight = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Thin.ttf"); robotoBold = Typeface.createFromAsset(getAssets(), "fonts/Roboto-Black.ttf"); // 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 //mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); rowItems = new ArrayList<RowItem>(); //Drawer list text + icons menutitles = getResources().getStringArray(R.array.navItemList); menuIcons = getResources().obtainTypedArray(R.array.navIconList); //Create drawer list items for (int i = 0; i < menutitles.length; i++) { RowItem items = new RowItem(menutitles[i], menuIcons.getResourceId(i, -1)); rowItems.add(items); } menuIcons.recycle(); //sets adaptor adapter = new NavListAdapter(getApplicationContext(), rowItems); mDrawerList.setAdapter(adapter); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); getActionBar().setIcon(R.drawable.ic_event); // 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_navigation_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); getActionBar().setTitle(pageList[gPosition]); if (gPosition == 0) { getActionBar().setIcon(R.drawable.ic_event); } else if (gPosition == 1) { getActionBar().setIcon(R.drawable.ic_list); } else if (gPosition == 2) { getActionBar().setIcon(R.drawable.ic_date); } invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); getActionBar().setIcon(R.drawable.ic_launcher); 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); } /* Called whenever we call invalidateOptionsMenu() */ @Override public boolean onPrepareOptionsMenu(Menu menu) { // If the nav drawer is open, hide action items related to the content view boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); menu.findItem(R.id.new_event).setVisible(!drawerOpen && gPosition != 2); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. if (mDrawerToggle.onOptionsItemSelected(item)) { return true; } // Handle action buttons switch (item.getItemId()) { case R.id.new_event: //if the user clicked the new event button Intent intent = new Intent(this, TaskCreator.class); startActivityForResult(intent, 1); //new event intent return true; default: 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) { if (position != 3) //position 3 is the settings intent, which should never be highlights { //highlight and font stuff. setNavDrawerItemNormal(); TextView txtview = ((TextView) view.findViewById(R.id.navItemText)); txtview.setTypeface(robotoBold); } selectItem(position); } } //Changes the font of unselected items to thin public void setNavDrawerItemNormal() { for (int i = 0; i < mDrawerList.getChildCount(); i++) { View v = mDrawerList.getChildAt(i); TextView txtview = ((TextView) v.findViewById(R.id.navItemText)); txtview.setTypeface(robotoLight); } } private void selectItem(int position) { //switches to the correct fragment. Fragment newFragment; FragmentTransaction transaction = getFragmentManager().beginTransaction(); switch (position) { case 0: newFragment = new AgendaFragment(); transaction.replace(R.id.content_frame, newFragment); transaction.addToBackStack(null); transaction.commit(); gPosition = position; setTitle(pageList[position]); break; case 1: Log.d("Case1", "test"); newFragment = new ToDoFragment(); transaction.replace(R.id.content_frame, newFragment); transaction.addToBackStack(null); transaction.commit(); Log.d("Case1", "test"); gPosition = position; setTitle(pageList[position]); break; case 2: newFragment = new CalendarFragment(); transaction.replace(R.id.content_frame, newFragment); transaction.addToBackStack(null); transaction.commit(); gPosition = position; setTitle(pageList[position]); break; case 3: Intent intent = new Intent(this, SettingsActivity.class); startActivity(intent); break; } mDrawerLayout.closeDrawer(mDrawerList); } @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); } public void openCal(View v) { //for the Calendar Fragment's button Long ldate = ((CalendarPickerView) findViewById(R.id.calendar_view)).getSelectedDate().getTime(); Intent intent = new Intent(this, DayAgenda.class); intent.putExtra("longdate", ldate); startActivity(intent); } protected void onActivityResult(int requestCode, int resultCode, Intent data) { //refresh the current fragment. FragmentTransaction tr = getFragmentManager().beginTransaction(); if (gPosition == 0) { tr.replace(R.id.content_frame, new AgendaFragment()); } else //if not in agenda view, go to todo view. { tr.replace(R.id.content_frame, new ToDoFragment()); } tr.commit(); } // @Override // protected void onStop() { // // Log.d("MainActivity", "is kill"); // android.os.Process.killProcess(android.os.Process.myPid()); // // super.onStop(); // } }