Java tutorial
/** * Copyright (C) 2013 Romain Guefveneu. * * This file is part of naonedbus. * * Naonedbus is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * Naonedbus is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package net.naonedbus.activity; import java.util.ArrayList; import java.util.List; import net.naonedbus.BuildConfig; import net.naonedbus.NBApplication; import net.naonedbus.R; import net.naonedbus.activity.impl.AboutActivity; import net.naonedbus.activity.impl.DonateActivity; import net.naonedbus.activity.impl.OldSettingsActivity; import net.naonedbus.activity.impl.SettingsActivity; import net.naonedbus.fragment.header.BicloosFragmentHeader; import net.naonedbus.fragment.header.FragmentHeader; import net.naonedbus.fragment.header.InfoTraficFragmentHeader; import net.naonedbus.fragment.header.ItineraireFragmentHeader; import net.naonedbus.fragment.header.MainFragmentHeader; import net.naonedbus.fragment.header.MapFragmentHeader; import net.naonedbus.fragment.header.ParkingsFragmentHeader; import net.naonedbus.fragment.header.SearchFragmentHeader; import net.naonedbus.widget.adapter.impl.MainMenuAdapter; import net.naonedbus.widget.item.impl.DrawerMenuItem; import net.naonedbus.widget.item.impl.MainMenuItem; import net.naonedbus.widget.item.impl.SettingMenuItem; import android.annotation.SuppressLint; import android.content.Intent; import android.content.res.Configuration; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.app.FragmentTransaction; import android.support.v4.view.GravityCompat; import android.support.v4.view.ViewPager; import android.support.v4.widget.DrawerLayout; import android.support.v4.widget.DrawerLayout.DrawerListener; import android.util.Log; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.FrameLayout; import android.widget.ListView; import com.actionbarsherlock.app.ActionBar; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuItem; import com.astuetz.PagerSlidingTabStrip; @SuppressLint("NewApi") public abstract class MenuDrawerActivity extends SherlockFragmentActivity { private static final String LOG_TAG = "MenuDrawerActivity"; private static final boolean DBG = BuildConfig.DEBUG; private static final String BUNDLE_MENU_POSITION = "MenuDrawerActivity:menuPosition"; private static final String BUNDLE_FRAGMENTS_TAGS = "MenuDrawerActivity:fragmentsTags"; private DrawerLayout mDrawerLayout; private ListView mDrawerList; private CharSequence mTitle; private MainMenuAdapter mAdapter; /** Titres des fragments. */ private int[] mTitles; /** Classes des fragments */ private String[] mClasses = new String[0]; /** Fragments tags. */ private String[] mFragmentsTags = new String[0]; private int mCurrentMenuItem = -1; private PagerSlidingTabStrip mTabs; private ViewPager mViewPager; private TabsAdapter mSectionsPagerAdapter; private FrameLayout mSingleFragmentContent; private final OnItemClickListener mOnMenuItemClickListener = new OnItemClickListener() { @Override public void onItemClick(final AdapterView<?> parent, final View view, final int position, final long id) { selectNavigationItem(position); } }; @Override public void onCreate(final Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_drawer_base); final ActionBar actionBar = getSupportActionBar(); actionBar.setHomeButtonEnabled(true); actionBar.setDisplayHomeAsUpEnabled(true); mTitle = getTitle(); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); mAdapter = buildMainMenuAdapter(); mDrawerList.setAdapter(mAdapter); mDrawerList.setChoiceMode(ListView.CHOICE_MODE_SINGLE); mDrawerList.setOnItemClickListener(mOnMenuItemClickListener); mDrawerLayout.setDrawerListener(new DrawerListener() { @Override public void onDrawerStateChanged(int arg0) { } @Override public void onDrawerSlide(View arg0, float arg1) { } @Override public void onDrawerOpened(View arg0) { invalidateOptionsMenu(); } @Override public void onDrawerClosed(View arg0) { invalidateOptionsMenu(); } }); mSectionsPagerAdapter = new TabsAdapter(getSupportFragmentManager()); mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(final int position) { getSupportActionBar().setSelectedNavigationItem(position); } }); mTabs = (PagerSlidingTabStrip) findViewById(R.id.tabs); mTabs.setViewPager(mViewPager); mTabs.setShouldExpand(!getResources().getBoolean(R.bool.isTablet)); mSingleFragmentContent = (FrameLayout) findViewById(R.id.singleFragmentContent); if (savedInstanceState != null && savedInstanceState.containsKey(BUNDLE_MENU_POSITION)) { final String[] fragmentsTags = savedInstanceState.getStringArray(BUNDLE_FRAGMENTS_TAGS); final boolean singleFragmentMode = fragmentsTags.length == 1; if (singleFragmentMode) { mFragmentsTags = fragmentsTags; } mCurrentMenuItem = Math.max(0, savedInstanceState.getInt(BUNDLE_MENU_POSITION)); selectNavigationItem(mCurrentMenuItem, !singleFragmentMode); } } @Override protected void onSaveInstanceState(final Bundle outState) { outState.putInt(BUNDLE_MENU_POSITION, mCurrentMenuItem); outState.putStringArray(BUNDLE_FRAGMENTS_TAGS, mFragmentsTags); super.onSaveInstanceState(outState); } @Override protected void onResume() { super.onResume(); NBApplication.getLocationProvider().onResume(); } @Override public boolean onPrepareOptionsMenu(final Menu menu) { final boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); final int itemCount = menu.size(); for (int i = 0; i < itemCount; i++) { final MenuItem item = menu.getItem(i); item.setVisible(!drawerOpen); } return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case android.R.id.home: if (mDrawerLayout.isDrawerOpen(mDrawerList)) { mDrawerLayout.closeDrawer(mDrawerList); } else { mDrawerLayout.openDrawer(mDrawerList); } return true; default: break; } return super.onOptionsItemSelected(item); } @Override public void setTitle(final CharSequence title) { mTitle = title; getSupportActionBar().setTitle(mTitle); } private MainMenuAdapter buildMainMenuAdapter() { return new MainMenuAdapter(this, getMainMenuItems()); } protected void selectNavigationItem(final int position) { selectNavigationItem(position, true); } private void selectNavigationItem(final int position, final boolean setFragment) { if (DBG) Log.d(LOG_TAG, "selectItem " + position); if (mDrawerLayout.isDrawerOpen(mDrawerList)) { new Handler().postDelayed(new Runnable() { @Override public void run() { mDrawerLayout.closeDrawer(mDrawerList); } }, 100); } final DrawerMenuItem item = mAdapter.getItem(position); if (item instanceof MainMenuItem) { mCurrentMenuItem = position; mDrawerList.setItemChecked(mCurrentMenuItem, true); mAdapter.setCurrentPosition(mCurrentMenuItem); MainMenuItem mainItem = (MainMenuItem) item; final FragmentHeader fragmentHeader = mainItem.getFragmentHeader(); if (setFragment) { setFragment(fragmentHeader, item.getTitle()); } } else if (item instanceof SettingMenuItem) { mDrawerList.setItemChecked(mCurrentMenuItem, true); SettingMenuItem settingItem = (SettingMenuItem) item; switch (settingItem.getId()) { case R.id.menu_settings: if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { startActivity(new Intent(this, SettingsActivity.class)); } else { startActivity(new Intent(this, OldSettingsActivity.class)); } break; case R.id.menu_about: startActivity(new Intent(this, AboutActivity.class)); break; case R.id.menu_donate: startActivity(new Intent(this, DonateActivity.class)); break; default: break; } } } protected void openDrawer() { mDrawerLayout.openDrawer(mDrawerList); } protected void setFragment(final FragmentHeader fragmentHeader, final int title) { if (DBG) Log.d(LOG_TAG, "setFragment " + getString(title)); clearFragments(); setTitle(title); final Class<?>[] classes = fragmentHeader.getFragmentsClasses(); mTitles = fragmentHeader.getFragmentsTitles(); mClasses = new String[classes.length]; for (int i = 0; i < classes.length; i++) { mClasses[i] = classes[i].getName(); } mFragmentsTags = new String[classes.length]; if (classes.length == 1) { setSingleFragment(); } else { setMultipleFragments(fragmentHeader.getSelectedPosition(this)); } } private void setSingleFragment() { final String fragmentTag = mClasses[0]; final FragmentManager fragmentManager = getSupportFragmentManager(); final FragmentTransaction transaction = fragmentManager.beginTransaction(); transaction.add(R.id.singleFragmentContent, Fragment.instantiate(MenuDrawerActivity.this, mClasses[0]), fragmentTag); transaction.commit(); mFragmentsTags[0] = fragmentTag; mTabs.setVisibility(View.GONE); mViewPager.setVisibility(View.GONE); mSingleFragmentContent.setVisibility(View.VISIBLE); } private void setMultipleFragments(final int selectedPosition) { mViewPager.setAdapter(mSectionsPagerAdapter); mViewPager.setOffscreenPageLimit(mClasses.length); if (mTitles.length == 1) { mTabs.setVisibility(View.GONE); } else { mTabs.setVisibility(View.VISIBLE); } mTabs.notifyDataSetChanged(); mViewPager.setCurrentItem(selectedPosition); mViewPager.setVisibility(View.VISIBLE); mSingleFragmentContent.setVisibility(View.GONE); } private void clearFragments() { final FragmentManager fragmentManager = getSupportFragmentManager(); final FragmentTransaction transaction = fragmentManager.beginTransaction(); for (final String tag : mFragmentsTags) { final Fragment fragment = fragmentManager.findFragmentByTag(tag); if (fragment != null) { transaction.remove(fragment); } } transaction.commit(); } public static List<DrawerMenuItem> getMainMenuItems() { final List<DrawerMenuItem> items = new ArrayList<DrawerMenuItem>(); items.add( new MainMenuItem(R.string.title_activity_main, R.drawable.ic_home_grey, new MainFragmentHeader())); items.add(new MainMenuItem(R.string.title_activity_itineraire, R.drawable.ic_navigation_grey, new ItineraireFragmentHeader())); items.add(new MainMenuItem(R.string.title_activity_infos_trafic, R.drawable.ic_traffic_grey, new InfoTraficFragmentHeader())); items.add(new MainMenuItem(R.string.title_activity_bicloo, R.drawable.ic_directions_bike_grey, new BicloosFragmentHeader())); items.add(new MainMenuItem(R.string.title_activity_parkings, R.drawable.ic_local_parking_grey, new ParkingsFragmentHeader())); items.add(new MainMenuItem(R.string.title_activity_carte, R.drawable.ic_explore_grey, new MapFragmentHeader())); items.add(new SettingMenuItem(R.id.menu_settings, R.string.title_activity_parametres)); items.add(new SettingMenuItem(R.id.menu_about, R.string.title_activity_about)); items.add(new SettingMenuItem(R.id.menu_donate, R.string.title_activity_donate)); return items; } public class TabsAdapter extends FragmentPagerAdapter { private static final String LOG_TAG = MenuDrawerActivity.LOG_TAG + "$TabsAdapter"; public TabsAdapter(final FragmentManager fm) { super(fm); } @Override public Object instantiateItem(final ViewGroup container, final int position) { if (DBG) Log.d(LOG_TAG, "instantiateItem " + position); final Fragment fragment = (Fragment) super.instantiateItem(container, position); fragment.setRetainInstance(true); mFragmentsTags[position] = fragment.getTag(); return fragment; } @Override public Fragment getItem(final int position) { if (DBG) Log.d(LOG_TAG, "getItem " + position + " : " + mClasses[position]); final Fragment fragment = Fragment.instantiate(MenuDrawerActivity.this, mClasses[position]); fragment.setRetainInstance(true); return fragment; } @Override public int getCount() { return mClasses.length; } @Override public CharSequence getPageTitle(final int position) { if (DBG) Log.d(LOG_TAG, "getPageTitle " + position); if (mTitles[position] == 0) { return ""; } else { return getString(mTitles[position]); } } } }