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.example.android.imaginarium; import com.example.android.common.view.SlidingTabLayout; import com.google.android.gms.common.SignInButton; import android.graphics.Color; 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.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import java.util.ArrayList; import java.util.List; /** * A basic sample which shows how to use {@link com.example.android.common.view.SlidingTabLayout} * to display a custom {@link ViewPager} title strip which gives continuous feedback to the user * when scrolling. */ public class SlidingTabsColorsFragment extends Fragment { /** * This class represents a tab to be displayed by {@link ViewPager} and it's associated * {@link SlidingTabLayout}. */ LogoutFragment logoutFragment; String gid; String username; String friendsList; public SlidingTabsColorsFragment() { super(); logoutFragment = new LogoutFragment(); } public void setGid(String set_gid) { this.gid = set_gid; } public void setUsername(String set_username) { this.username = set_username; } public void setFriends(String friends) { this.friendsList = friends; } static class SamplePagerItem { private final CharSequence mTitle; private final int mIndicatorColor; private final int mDividerColor; SamplePagerItem(CharSequence title, int indicatorColor, int dividerColor) { mTitle = title; mIndicatorColor = indicatorColor; mDividerColor = dividerColor; } /** * @return A new {@link Fragment} to be displayed by a {@link ViewPager} */ Fragment createFragment() { return ContentFragment.newInstance(mTitle, mIndicatorColor, mDividerColor); } /** * @return the title which represents this tab. In this sample this is used directly by * {@link android.support.v4.view.PagerAdapter#getPageTitle(int)} */ CharSequence getTitle() { return mTitle; } /** * @return the color to be used for indicator on the {@link SlidingTabLayout} */ int getIndicatorColor() { return mIndicatorColor; } /** * @return the color to be used for right divider on the {@link SlidingTabLayout} */ int getDividerColor() { return mDividerColor; } } static final String LOG_TAG = "Imaginarium"; /** * A custom {@link ViewPager} title strip which looks much like Tabs present in Android v4.0 and * above, but is designed to give continuous feedback to the user when scrolling. */ private SlidingTabLayout mSlidingTabLayout; /** * A {@link ViewPager} which will be used in conjunction with the {@link SlidingTabLayout} above. */ private ViewPager mViewPager; /** * List of {@link SamplePagerItem} which represent this sample's tabs. */ private List<SamplePagerItem> mTabs = new ArrayList<SamplePagerItem>(); @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // BEGIN_INCLUDE (populate_tabs) /** * Populate our tab list with tabs. Each item contains a title, indicator color and divider * color, which are used by {@link SlidingTabLayout}. */ mTabs.add(new SamplePagerItem(getString(R.string.tab_newsfeed), // Title Color.BLUE, // Indicator color Color.GRAY // Divider color )); mTabs.add(new SamplePagerItem(getString(R.string.tab_new_story), // Title Color.RED, // Indicator color Color.GRAY // Divider color )); mTabs.add(new SamplePagerItem(getString(R.string.tab_my_stories), // Title Color.YELLOW, // Indicator color Color.GRAY // Divider color )); mTabs.add(new SamplePagerItem(getString(R.string.tab_notifications), // Title Color.GREEN, // Indicator color Color.GRAY // Divider color )); // END_INCLUDE (populate_tabs) } /** * Inflates the {@link View} which will be displayed by this {@link Fragment}, from the app's * resources. */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_sample, container, false); } // BEGIN_INCLUDE (fragment_onviewcreated) /** * This is called after the {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} has finished. * Here we can pick out the {@link View}s we need to configure from the content view. * * We set the {@link ViewPager}'s adapter to be an instance of * {@link SampleFragmentPagerAdapter}. The {@link SlidingTabLayout} is then given the * {@link ViewPager} so that it can populate itself. * * @param view View created in {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} */ @Override public void onViewCreated(View view, Bundle savedInstanceState) { // BEGIN_INCLUDE (setup_viewpager) // Get the ViewPager and set it's PagerAdapter so that it can display items mViewPager = (ViewPager) view.findViewById(R.id.viewpager); mViewPager.setAdapter(new SampleFragmentPagerAdapter(getChildFragmentManager())); // END_INCLUDE (setup_viewpager) // BEGIN_INCLUDE (setup_slidingtablayout) // Give the SlidingTabLayout the ViewPager, this must be done AFTER the ViewPager has had // it's PagerAdapter set. mSlidingTabLayout = (SlidingTabLayout) view.findViewById(R.id.sliding_tabs); mSlidingTabLayout.setViewPager(mViewPager); // BEGIN_INCLUDE (tab_colorizer) // Set a TabColorizer to customize the indicator and divider colors. Here we just retrieve // the tab at the position, and return it's set color mSlidingTabLayout.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() { @Override public int getIndicatorColor(int position) { return mTabs.get(position).getIndicatorColor(); } @Override public int getDividerColor(int position) { return mTabs.get(position).getDividerColor(); } }); // END_INCLUDE (tab_colorizer) // END_INCLUDE (setup_slidingtablayout) } // END_INCLUDE (fragment_onviewcreated) /** * The {@link FragmentPagerAdapter} used to display pages in this sample. The individual pages * are instances of {@link ContentFragment} which just display three lines of text. Each page is * created by the relevant {@link SamplePagerItem} for the requested position. * <p> * The important section of this class is the {@link #getPageTitle(int)} method which controls * what is displayed in the {@link SlidingTabLayout}. */ class SampleFragmentPagerAdapter extends FragmentPagerAdapter { SampleFragmentPagerAdapter(FragmentManager fm) { super(fm); } /** * Return the {@link android.support.v4.app.Fragment} to be displayed at {@code position}. * <p> * Here we return the value returned from {@link SamplePagerItem#createFragment()}. */ @Override public Fragment getItem(int i) { Fragment f; switch (i % 4) { case 0: f = new NewsFeed(); Bundle bundle1 = new Bundle(); bundle1.putInt("is_newsfeed", 1); bundle1.putString("gid", gid); bundle1.putString("username", username); bundle1.putString("friends", friendsList); f.setArguments(bundle1); return f; case 1: NewStory newStory = new NewStory(); newStory.setGID(gid); newStory.setUsername(username); return newStory; case 2: f = new NewsFeed(); Bundle bundle2 = new Bundle(); bundle2.putInt("is_newsfeed", 0); bundle2.putString("gid", gid); bundle2.putString("username", username); bundle2.putString("friends", ""); f.setArguments(bundle2); return f; case 3: return new Notifications(); case 4: return logoutFragment; default: return mTabs.get(i).createFragment(); } } @Override public int getCount() { return mTabs.size(); } // BEGIN_INCLUDE (pageradapter_getpagetitle) /** * Return the title of the item at {@code position}. This is important as what this method * returns is what is displayed in the {@link SlidingTabLayout}. * <p> * Here we return the value returned from {@link SamplePagerItem#getTitle()}. */ @Override public CharSequence getPageTitle(int position) { return mTabs.get(position).getTitle(); } // END_INCLUDE (pageradapter_getpagetitle) } }