Java tutorial
/* * Copyright (C) 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.codejune.material.slidingtabs.fragments; import android.app.Fragment; import android.os.Bundle; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import com.codejune.material.R; import com.codejune.material.slidingtabs.views.SlidingTabLayout; public class SlidingTabsBasicFragment extends Fragment { static final String LOG_TAG = "SlidingTabsBasicFragment"; /** * A custom {@link android.support.v4.view.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 android.support.v4.view.ViewPager} which will be used in conjunction with the {@link SlidingTabLayout} above. */ private ViewPager mViewPager; /** * Inflates the {@link android.view.View} which will be displayed by this {@link android.app.Fragment}, from the app's * resources. */ @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_sliding, container, false); } // BEGIN_INCLUDE (fragment_onviewcreated) /** * This is called after the {@link #onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)} has finished. * Here we can pick out the {@link android.view.View}s we need to configure from the content view. * * We set the {@link android.support.v4.view.ViewPager}'s adapter to be an instance of {@link com.codejune.material.slidingtabs.fragments.SlidingTabsBasicFragment.SamplePagerAdapter}. The * {@link SlidingTabLayout} is then given the {@link android.support.v4.view.ViewPager} so that it can populate itself. * * @param view View created in {@link #onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.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 SamplePagerAdapter()); // 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); // END_INCLUDE (setup_slidingtablayout) } // END_INCLUDE (fragment_onviewcreated) /** * The {@link android.support.v4.view.PagerAdapter} used to display pages in this sample. * The individual pages are simple and just display two lines of text. The important section of * this class is the {@link #getPageTitle(int)} method which controls what is displayed in the * {@link SlidingTabLayout}. */ class SamplePagerAdapter extends PagerAdapter { final String[] TITLES = { "CATEGORIES", "HOME", "TOP SELLING", "TOP GAMES", "TOP GROSSING" }; /** * @return the number of pages to display */ @Override public int getCount() { return 5; } /** * @return true if the value returned from {@link #instantiateItem(android.view.ViewGroup, int)} is the * same object as the {@link android.view.View} added to the {@link android.support.v4.view.ViewPager}. */ @Override public boolean isViewFromObject(View view, Object o) { return o == view; } // 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 construct one using the position value, but for real application the title should * refer to the item's contents. */ @Override public CharSequence getPageTitle(int position) { return TITLES[position]; } // END_INCLUDE (pageradapter_getpagetitle) /** * Instantiate the {@link android.view.View} which should be displayed at {@code position}. Here we * inflate a layout from the apps resources and then change the text view to signify the position. */ @Override public Object instantiateItem(ViewGroup container, int position) { // Inflate a new layout from our resources View view = getActivity().getLayoutInflater().inflate(R.layout.item_sliding_pager, container, false); // Add the newly created View to the ViewPager container.addView(view); // Return the View return view; } /** * Destroy the item from the {@link android.support.v4.view.ViewPager}. In our case this is simply removing the * {@link android.view.View}. */ @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); Log.i(LOG_TAG, "destroyItem() [position: " + position + "]"); } } }