Java tutorial
/* * Copyright 2011 Google Inc. * Copyright 2011 Peter Kuterna * * 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 net.peterkuterna.android.apps.devoxxfrsched.ui; import net.peterkuterna.android.apps.devoxxfrsched.R; import net.peterkuterna.android.apps.devoxxfrsched.provider.CfpContract; import net.peterkuterna.android.apps.devoxxfrsched.provider.CfpContract.Sessions; import net.peterkuterna.android.apps.devoxxfrsched.ui.phone.SessionDetailActivity; import net.peterkuterna.android.apps.devoxxfrsched.ui.phone.SessionsActivity; import net.peterkuterna.android.apps.devoxxfrsched.ui.widget.ScrollableTabs; import net.peterkuterna.android.apps.devoxxfrsched.ui.widget.ScrollableTabsAdapter; import net.peterkuterna.android.apps.devoxxfrsched.util.ActivityHelper; import net.peterkuterna.android.apps.devoxxfrsched.util.UIUtils; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.view.ViewPager; import android.text.format.DateUtils; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.LinearLayout; import android.widget.TextView; /** * An activity that shows the user's starred sessions. This activity can be * either single or multi-pane, depending on the device configuration. We want * the multi-pane support that {@link BaseMultiPaneActivity} offers, so we * inherit from it instead of {@link BaseSinglePaneActivity}. */ public class StarredActivity extends BaseMultiPaneActivity { private FragmentManager mFragmentManager; private SessionsFragment mSessionsFragment; private ViewPager mViewPager; private ViewGroup mTabsContainer; private ScrollableTabs mTabs; private HomePagerAdapter mAdapter; private boolean mDuringConference = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_starred); Intent intent = new Intent(); intent.setData(CfpContract.Sessions.CONTENT_STARRED_URI); final FragmentManager fm = getSupportFragmentManager(); if (findViewById(R.id.root_container) != null) { mSessionsFragment = (SessionsFragment) fm.findFragmentByTag("sessions"); if (mSessionsFragment == null) { mSessionsFragment = new SessionsFragment(); mSessionsFragment.setArguments(intentToFragmentArguments(intent)); fm.beginTransaction().add(R.id.root_container, mSessionsFragment, "sessions").commit(); } } mViewPager = (ViewPager) findViewById(R.id.viewpager); if (mViewPager != null) { mViewPager.setPageMargin(getResources().getDimensionPixelSize(R.dimen.viewpager_page_margin)); mViewPager.setPageMarginDrawable(R.drawable.viewpager_margin); mAdapter = new HomePagerAdapter(getSupportFragmentManager()); mViewPager.setAdapter(mAdapter); mTabsContainer = (ViewGroup) findViewById(R.id.viewpagerheader_container); mTabs = (ScrollableTabs) findViewById(R.id.viewpagerheader); mTabs.setAdapter(mAdapter); mViewPager.setOnPageChangeListener(mTabs); refreshPager(); } mActivityHelper.onCreate(savedInstanceState); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); ViewGroup detailContainer = (ViewGroup) findViewById(R.id.fragment_container_starred_detail); if (detailContainer != null && detailContainer.getChildCount() > 1) { findViewById(android.R.id.empty).setVisibility(View.GONE); } } @Override public FragmentReplaceInfo onSubstituteFragmentForActivityLaunch(String activityClassName) { if (findViewById(R.id.fragment_container_starred_detail) != null) { findViewById(android.R.id.empty).setVisibility(View.GONE); if (SessionDetailActivity.class.getName().equals(activityClassName)) { clearSelectedItems(); return new FragmentReplaceInfo(SessionDetailFragment.class, "session_detail", R.id.fragment_container_starred_detail); } else if (SessionsActivity.class.getName().equals(activityClassName)) { return new FragmentReplaceInfo(SessionsFragment.class, "sessions", R.id.root_container); } } return null; } private void clearSelectedItems() { if (mSessionsFragment != null) { mSessionsFragment.clearCheckedPosition(); } } private void refreshPager() { final long currentTimeMillis = UIUtils.getCurrentTime(this); if (currentTimeMillis >= UIUtils.START_DAYS_IN_MILLIS[0] && currentTimeMillis < (UIUtils.START_DAYS_IN_MILLIS[UIUtils.NUMBER_DAYS - 1] + DateUtils.DAY_IN_MILLIS)) { mDuringConference = true; } else { mDuringConference = false; } mTabsContainer.setVisibility(mDuringConference ? View.VISIBLE : View.GONE); mViewPager.setAdapter(mAdapter); mTabs.setAdapter(mAdapter); } private class HomePagerAdapter extends FragmentPagerAdapter implements ScrollableTabsAdapter { public HomePagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { switch (position) { case 0: SessionsFragment f = new SessionsFragment(); final Intent intent = new Intent(Intent.ACTION_VIEW, Sessions.CONTENT_STARRED_URI); f.setArguments(ActivityHelper.intentToFragmentArguments(intent)); return f; case 1: return SessionScheduleItemsFragment.newInstance(UIUtils.getCurrentTime(StarredActivity.this)); } return null; } @Override public int getCount() { return mDuringConference ? 2 : 1; } @Override public TextView getTab(final int position, LinearLayout root) { final TextView indicator = (TextView) getLayoutInflater().inflate(R.layout.tab_indicator_home, null, false); indicator.setText(position == 0 ? R.string.title_all_starred : R.string.title_todays_starred); indicator.setOnClickListener(new OnClickListener() { @Override public void onClick(final View v) { mViewPager.setCurrentItem(position); } }); return indicator; } } }