Java tutorial
package com.spacescout.spacescout_android; /* * 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 android.app.Activity; import android.app.Fragment; import android.app.FragmentManager; import android.content.Context; import android.content.Intent; import android.content.res.Configuration; import android.graphics.Typeface; 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.widget.AdapterView; import android.widget.ListView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends Activity { private DrawerLayout mDrawerLayout; private ListView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private FragmentManager fragmentManager; private Fragment fragSpaceList = new SpaceListActivity(); private Fragment fragSpaceMap = new SpaceMapActivity(); private Fragment generalFrag; NavMenuListAdapter mNavMenuAdapter; String[] navItemTitle; int[] navItemIcon; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getActionBar().setDisplayShowCustomEnabled(true); getActionBar().setDisplayShowTitleEnabled(false); overridePendingTransition(R.anim.fadein, R.anim.fadeout); //set content to layout_main setContentView(R.layout.layout_main); //get the title mTitle = mDrawerTitle = getTitle(); //Generate nav menu item title navItemTitle = new String[] { "All Spaces", "Filter Spaces", "Favorite Spaces" }; navItemIcon = new int[] { R.drawable.nav_all_spaces, R.drawable.nav_search, R.drawable.nav_fav_spaces }; //Locate drawer_layout and drawer ListView in layout_main.xml 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); //pass string arrays to NavMenuListAdapter mNavMenuAdapter = new NavMenuListAdapter(this.getBaseContext(), navItemTitle, navItemIcon); //set the NavMenuListAdapter to the ListView mDrawerList.setAdapter(mNavMenuAdapter); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); // 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.navigation_drawer_open, /* "open drawer" description for accessibility */ R.string.navigation_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); // enable ActionBar app icon to behave as action to toggle nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); LayoutInflater inflator = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View v = inflator.inflate(R.layout.custom_title_actionbar, null); Typeface typeface = Typeface.createFromAsset(this.getAssets(), "fonts/Manteka.ttf"); TextView titleSpace = (TextView) v.findViewById(R.id.titleSpace); TextView titleScout = (TextView) v.findViewById(R.id.titleScout); titleSpace.setTypeface(typeface); titleScout.setTypeface(typeface); getActionBar().setCustomView(v); 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); // generalFrag = fragmentManager.findFragmentByTag("SPACE_LIST"); if (fragSpaceList != null && !drawerOpen && fragSpaceList.isVisible()) { menu.findItem(R.id.action_space_list).setVisible(false); } else { menu.findItem(R.id.action_space_map).setVisible(false); } return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { fragmentManager = getFragmentManager(); // 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()) { //on click of space list action item case R.id.action_space_list: fragmentManager.beginTransaction().replace(R.id.container, fragSpaceList, "SPACE_LIST").commit(); invalidateOptionsMenu(); return super.onOptionsItemSelected(item); case R.id.action_space_map: fragmentManager.beginTransaction().replace(R.id.container, fragSpaceMap, "SPACE_MAP").commit(); invalidateOptionsMenu(); return super.onOptionsItemSelected(item); case R.id.action_search: Intent intent = new Intent(this, FilterSpacesActivity.class); startActivity(intent); mDrawerList.setItemChecked(1, true); return super.onOptionsItemSelected(item); 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) { selectItem(position); } } private void selectItem(int position) { fragmentManager = getFragmentManager(); Intent intent; // Locate Position switch (position) { case 0: fragmentManager.beginTransaction().replace(R.id.container, fragSpaceMap, "SPACE_MAP").commit(); invalidateOptionsMenu(); break; case 1: intent = new Intent(this, FilterSpacesActivity.class); startActivity(intent); invalidateOptionsMenu(); break; case 2: intent = new Intent(this, FavSpacesActivity.class); startActivity(intent); invalidateOptionsMenu(); break; case 3: Toast.makeText(getApplicationContext(), "Settings", Toast.LENGTH_SHORT).show(); break; case 4: Toast.makeText(getApplicationContext(), "About SpaceScout", Toast.LENGTH_SHORT).show(); break; } mDrawerList.setItemChecked(position, true); mDrawerLayout.closeDrawer(mDrawerList); mDrawerToggle.syncState(); } @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 toggls mDrawerToggle.onConfigurationChanged(newConfig); } @Override public void onResume() { super.onResume(); LayoutInflater inflator = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); View v = inflator.inflate(R.layout.custom_title_actionbar, null); Typeface typeface = Typeface.createFromAsset(this.getAssets(), "fonts/Manteka.ttf"); TextView titleSpace = (TextView) v.findViewById(R.id.titleSpace); TextView titleScout = (TextView) v.findViewById(R.id.titleScout); titleSpace.setTypeface(typeface); titleScout.setTypeface(typeface); getActionBar().setCustomView(v); } }