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.songnick.blogdemo.fragment; import android.annotation.SuppressLint; 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 android.widget.TextView; import com.songnick.blogdemo.R; import com.songnick.blogdemo.widget.SlidingTabLayout; /** * 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. */ @SuppressLint("NewApi") public class NetEaseDemo_Fragment extends Fragment { static final String LOG_TAG = "SlidingTabsBasicFragment"; /** * 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; /** * 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.netease_content_layout, 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 SamplePagerAdapter}. 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 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.setCustomTabView(R.layout.slid_tab_item, R.id.slide_tab_item); 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 { /** * @return the number of pages to display */ @Override public int getCount() { return 10; } /** * @return true if the value returned from {@link #instantiateItem(ViewGroup, int)} is the * same object as the {@link View} added to the {@link 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 "Item " + (position + 1); } // END_INCLUDE (pageradapter_getpagetitle) /** * Instantiate the {@link 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.netease_content_pager_item, container, false); // Add the newly created View to the ViewPager container.addView(view); // Retrieve a TextView from the inflated View, and update it's text TextView title = (TextView) view.findViewById(R.id.item_title); title.setText(String.valueOf(position + 1)); Log.i(LOG_TAG, "instantiateItem() [position: " + position + "]"); // Return the View return view; } /** * Destroy the item from the {@link ViewPager}. In our case this is simply removing the * {@link View}. */ @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); Log.i(LOG_TAG, "destroyItem() [position: " + position + "]"); } } }