Java tutorial
/* * Copyright (C) 2012 yueyueniao * * 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.slidingmenu.fragment; import java.util.ArrayList; import android.app.Activity; import android.os.AsyncTask; 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.View.OnClickListener; import android.view.ViewGroup; import android.widget.Button; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; import com.example.slidingmenu.R; import com.example.slidingmenu.activity.SlidingActivity; import com.example.slidingmenu.adapter.ListViewPagerAdapter; import com.example.slidingmenu.adapter.ScrollingTabsAdapter; import com.example.slidingmenu.view.ScrollableTabView; import com.handmark.pulltorefresh.library.PullToRefreshBase; import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener; public class NewsFragment extends Fragment implements OnRefreshListener<ListView>, ViewPager.OnPageChangeListener { private static final String TAG = "NewsFragment"; private View showLeft; private View showRight; private TextView mTopTitleView; private ImageView mTopBackView; private MyAdapter mAdapter; private ViewPager mPager; private ArrayList<Fragment> pagerItemList = null; private ListViewPagerAdapter listViewPagerAdapter; private Activity mActivity; private ScrollableTabView mScrollableTabView; private ScrollingTabsAdapter mScrollingTabsAdapter; public NewsFragment() { } public NewsFragment(Activity activity) { this.mActivity = activity; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.e(TAG, "onCreate"); } @Override public void onDestroy() { super.onDestroy(); Log.e(TAG, "onDestroy"); } public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { Log.e(TAG, "onCreateView"); View mView = inflater.inflate(R.layout.view_pager, null); showLeft = (View) mView.findViewById(R.id.head_layout_showLeft); showRight = (View) mView.findViewById(R.id.head_layout_showRight); mTopTitleView = (TextView) showLeft.findViewById(R.id.head_layout_text); mTopTitleView.setText(getString(R.string.tab_news)); mTopBackView = (ImageView) showLeft.findViewById(R.id.head_layout_back); mTopBackView.setBackgroundResource(R.drawable.biz_news_main_back_normal); mPager = (ViewPager) mView.findViewById(R.id.vp_list); listViewPagerAdapter = new ListViewPagerAdapter(this); mPager.setAdapter(listViewPagerAdapter); pagerItemList = new ArrayList<Fragment>(); pagerItemList.add(new Fragment()); pagerItemList.add(new Fragment()); pagerItemList.add(new Fragment()); pagerItemList.add(new Fragment()); pagerItemList.add(new Fragment()); pagerItemList.add(new Fragment()); pagerItemList.add(new Fragment()); // PageFragment1 page1 = new PageFragment1(); // PageFragment2 page2 = new PageFragment2(); // pagerItemList.add(page1); // pagerItemList.add(page2); // mAdapter = new MyAdapter(getFragmentManager()); // mPager.setAdapter(mAdapter); mPager.setOnPageChangeListener(this); initScrollableTabs(mView, mPager); return mView; } private void initScrollableTabs(View view, ViewPager mViewPager) { mScrollableTabView = (ScrollableTabView) view.findViewById(R.id.scrollabletabview); mScrollingTabsAdapter = new ScrollingTabsAdapter(mActivity); mScrollableTabView.setAdapter(mScrollingTabsAdapter); mScrollableTabView.setViewPage(mViewPager); } public ViewPager getViewPage() { return mPager; } public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); showLeft.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ((SlidingActivity) getActivity()).showLeft(); } }); showRight.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ((SlidingActivity) getActivity()).showRight(); } }); } public boolean isFirst() { Log.e(TAG, "isFirst: " + mPager.getCurrentItem() + ", pagerItemList " + pagerItemList.size()); if (mPager.getCurrentItem() == 0) return true; else return false; } public boolean isEnd() { Log.e(TAG, "isEnd: " + mPager.getCurrentItem() + ", pagerItemList " + pagerItemList.size()); if (mPager.getCurrentItem() == pagerItemList.size() - 1) return true; else return false; } public class MyAdapter extends FragmentPagerAdapter { public MyAdapter(FragmentManager fm) { super(fm); } @Override public int getCount() { return pagerItemList.size(); } @Override public Fragment getItem(int position) { Fragment fragment = null; if (position < pagerItemList.size()) fragment = pagerItemList.get(position); else fragment = pagerItemList.get(0); return fragment; } } private MyPageChangeListener myPageChangeListener; public void setMyPageChangeListener(MyPageChangeListener l) { myPageChangeListener = l; } public interface MyPageChangeListener { public void onPageSelected(int position); } @Override public void onRefresh(PullToRefreshBase<ListView> refreshView) { new GetDataTask(refreshView).execute(); } private static class GetDataTask extends AsyncTask<Void, Void, Void> { PullToRefreshBase<?> mRefreshedView; public GetDataTask(PullToRefreshBase<?> refreshedView) { mRefreshedView = refreshedView; } @Override protected Void doInBackground(Void... params) { // Simulates a background job. try { Thread.sleep(4000); } catch (InterruptedException e) { } return null; } @Override protected void onPostExecute(Void result) { mRefreshedView.onRefreshComplete(); super.onPostExecute(result); } } @Override public void onPageScrollStateChanged(int position) { } @Override public void onPageScrolled(int position, float arg1, int arg2) { } @Override public void onPageSelected(int position) { if (myPageChangeListener != null) { myPageChangeListener.onPageSelected(position); } if (mScrollableTabView != null) { mScrollableTabView.selectTab(position); } } @Override public void onDestroyView() { super.onDestroyView(); Log.e(TAG, "onDestroyView"); listViewPagerAdapter = null; pagerItemList.clear(); pagerItemList = null; mScrollableTabView = null; mScrollingTabsAdapter = null; mActivity = null; } }