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 com.techsoc.cultureconnect.navigation; import android.app.ActionBar; import android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.content.Intent; import android.content.res.Configuration; import android.graphics.Color; import android.graphics.drawable.ColorDrawable; import android.os.Bundle; 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.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.ListView; import com.techsoc.cultureconnect.R; import com.techsoc.cultureconnect.settings.MySettings; import com.techsoc.cultureconnect.talk.BluetoothChat; public class NavigationActivity extends Activity { private DrawerLayout mDrawerLayout; private ListView mDrawerListLeft; private ActionBarDrawerToggle mDrawerToggleLeft;//nav button private CharSequence mDrawerTitle;//get the value from the drawer and set title to it private CharSequence mTitle;//title of the screen private String[] mOptions;//String-array with menu options @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.nav_main_activity); mTitle = mDrawerTitle = "";//getTitle(); mOptions = getResources().getStringArray(R.array.options); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerListLeft = (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 mDrawerListLeft.setAdapter(new ArrayAdapter<String>(this, R.layout.nav_drawer_list_item, mOptions)); mDrawerListLeft.setOnItemClickListener(new DrawerItemClickListener()); ActionBar actionBar = getActionBar(); actionBar.setIcon(R.drawable.culture_connect_white); actionBar.setBackgroundDrawable(new ColorDrawable(getResources().getColor(R.color.CultureConnect))); actionBar.setTitle(null); // enable ActionBar app icon to behave as action to toggle nav drawer actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setHomeButtonEnabled(true); // ActionBarDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggleLeft = 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(mDrawerToggleLeft); 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 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 (mDrawerToggleLeft.onOptionsItemSelected(item)) { return true; } switch (item.getItemId()) { case R.id.navSettings: // create intent to perform web search for this planet Intent intent = new Intent(this, MySettings.class); intent.putExtra("previous_class", "Navigation"); startActivity(intent); break; } 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) { // update the main content by replacing fragments int talkIntent = 0; Fragment fragment = null; switch (position) { case 0: fragment = new FactsFragment(); break; case 1: fragment = new PlacesFragment(); break; case 2: break; case 3: break; case 4: break; case 5: talkIntent = 1; break; } if (talkIntent == 1) { Intent intent = new Intent(this, BluetoothChat.class); startActivity(intent); } else { FragmentManager fragmentManager = getFragmentManager(); fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit(); // update selected item and title, then close the drawer mDrawerListLeft.setItemChecked(position, true); setTitle(mOptions[position]); mDrawerLayout.closeDrawer(mDrawerListLeft); } } @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. mDrawerToggleLeft.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); // Pass any configuration change to the drawer toggls mDrawerToggleLeft.onConfigurationChanged(newConfig); } public static class PlacesFragment extends Fragment { public PlacesFragment() { // Empty constructor required for fragment subclasses } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View layoutView = inflater.inflate(R.layout.nav_places_layout, container, false); Button helloButton = (Button) layoutView.findViewById(R.id.places_hello_button); helloButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { v.setBackgroundColor(Color.CYAN); } }); getActivity().setTitle("Places"); return layoutView; } } public static class FactsFragment extends Fragment { public FactsFragment() { // Empty constructor required for fragment subclasses } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.nav_fragment_option, container, false); getActivity().setTitle("Facts"); return rootView; } } }