本文實例為大家分享了Android實現京東首頁效果的具體代碼，供大家參考，具體內容如下

源碼鏈接

<?xml version='1.0' encoding='utf-8'?><com.scwang.smart.refresh.layout.SmartRefreshLayout xmlns:android='http://schemas.android.com/apk/res/android' xmlns:app='http://schemas.android.com/apk/res-auto' android: android:layout_width='match_parent' android:layout_height='match_parent' android:background='@color/background_color' app:srlDisableContentWhenRefresh='true' app:srlEnableOverScrollBounce='false' app:srlHeaderMaxDragRate='2' app:srlPrimaryColor='@color/theme_color'> <RelativeLayoutandroid:layout_width='match_parent'android:layout_height='match_parent'> <androidx.coordinatorlayout.widget.CoordinatorLayout android:layout_width='match_parent' android:layout_height='match_parent'> <com.google.android.material.appbar.AppBarLayoutandroid: android:layout_width='match_parent'android:layout_height='wrap_content'app:elevation='0dp'app:layout_behavior='com.yuruiyin.appbarlayoutbehavior.AppBarLayoutBehavior'> <com.google.android.material.appbar.CollapsingToolbarLayout android:layout_width='match_parent' android:layout_height='wrap_content' app:layout_scrollFlags='scroll|exitUntilCollapsed'> <RelativeLayoutandroid:layout_width='match_parent'android:layout_height='wrap_content'android:background='@color/white_color'> <ImageView android:layout_width='match_parent' android:layout_height='180dp' android:scaleType='fitXY' android:visibility='gone' android:src='http://www.b3g6.com/bcjs/@drawable/ic_launcher_background' /> <RelativeLayout android: android:layout_width='match_parent' android:layout_height='wrap_content' /> </RelativeLayout> <!-- 給SlidingTabLayout占位的--> <androidx.appcompat.widget.Toolbarandroid: android:layout_width='match_parent'android:layout_height='40dp' /></com.google.android.material.appbar.CollapsingToolbarLayout> <com.flyco.tablayout.SlidingTabLayout android: android:layout_width='match_parent' android:layout_height='50dp' android:background='@color/background_color' app:tl_indicator_height='0dp' app:tl_textBold='SELECT' app:tl_textSelectColor='#f000' app:tl_textUnselectColor='@color/txt_color' app:tl_textsize='16sp' /> </com.google.android.material.appbar.AppBarLayout> <androidx.viewpager.widget.ViewPagerandroid: android:layout_width='match_parent'android:layout_height='match_parent'app:layout_behavior='@string/appbar_scrolling_view_behavior' /> </androidx.coordinatorlayout.widget.CoordinatorLayout><RelativeLayout android: android:layout_width='match_parent' android:layout_height='wrap_content' android:layout_marginBottom='50dp' android:layout_alignParentBottom='true'> </RelativeLayout> <RelativeLayout android: android:layout_width='match_parent' android:layout_height='40dp' android:background='@color/theme_color'> <include layout='@layout/top_view_layout' /> </RelativeLayout> </RelativeLayout></com.scwang.smart.refresh.layout.SmartRefreshLayout>3.功能

package com.example.doublesucktopdemo; import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.RelativeLayout;import android.widget.Toast; import androidx.annotation.NonNull;import androidx.annotation.Nullable;import androidx.cardview.widget.CardView;import androidx.coordinatorlayout.widget.CoordinatorLayout;import androidx.fragment.app.Fragment;import androidx.fragment.app.FragmentActivity;import androidx.recyclerview.widget.GridLayoutManager;import androidx.recyclerview.widget.LinearLayoutManager;import androidx.recyclerview.widget.RecyclerView;import androidx.viewpager.widget.ViewPager; import com.chad.library.adapter.base.BaseQuickAdapter;import com.example.doublesucktopdemo.adapter.HomeViewPagerAdapter;import com.example.doublesucktopdemo.adapter.MyBannerAdapter;import com.example.doublesucktopdemo.adapter.RecommendAdapter;import com.example.doublesucktopdemo.grid.MyAdapter2;import com.example.doublesucktopdemo.grid.PagerConfig;import com.example.doublesucktopdemo.grid.PagerGridLayoutManager;import com.example.doublesucktopdemo.widget.RecyclerViewDivider;import com.example.doublesucktopdemo.widget.RefreshHeaderView.TodayNewsHeader;import com.flyco.tablayout.SlidingTabLayout;import com.flyco.tablayout.listener.OnTabSelectListener;import com.google.android.material.appbar.AppBarLayout;import com.leaf.library.StatusBarUtil;import com.scwang.smart.refresh.layout.SmartRefreshLayout;import com.scwang.smart.refresh.layout.api.RefreshLayout;import com.scwang.smart.refresh.layout.listener.OnRefreshListener;import com.youth.banner.Banner;import com.youth.banner.config.IndicatorConfig;import com.youth.banner.indicator.CircleIndicator; import java.util.ArrayList;import java.util.List; /** * Created by weioule * on 2019/6/26. */public class MainActivity extends FragmentActivity implements PagerGridLayoutManager.PageListener { private SmartRefreshLayout refreshView; private AppBarLayout mAppBarLayout; private RelativeLayout mFloatSearchRl; ///非常重要 private RelativeLayout mHeaderLl; private RelativeLayout mFotterLl; CardView mCardView; private SlidingTabLayout mTabView; private ViewPager mViewPager; private int totalScrollRange, oldVerticalOffset = -1; private HomeViewPagerAdapter fragmentAdapter; private String[] titles = {'首頁', '手機', '食品', '生鮮', '休閑零食', '家居廚具', '美妝'}; private ArrayList<ProductBean> list = new ArrayList<>(); private List<Fragment> fragmentList; private int mRows = 1; //設置行數 private int mColumns = 4; //設置列數 private RecyclerView mRecyclerView; private MyAdapter2 mAdapter; private PagerGridLayoutManager mLayoutManager; private RelativeLayout lineParent; private int mTotal = 0; private int mCurrent = 0; private View lineChild; private ImageView iv_icon_bottom; private RelativeLayout rl_cancel_bottom; private String[] names = {'多多果園','九塊九特賣','多多愛消除','天天領現金' ,'行家幫你選','限時秒殺','斷碼清倉','跟著好評買' ,'充值中心','醫藥館','簽到','多多賺大錢' ,'砍價免費拿','多多精靈','省錢月卡','現金大轉盤' }; @Override protected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();addListener(); } private void initView() { // StatusBarUtil.setColor(this, getColor(R.color.theme_color));refreshView = findViewById(R.id.refresh_view);mFloatSearchRl = findViewById(R.id.rl_float_search);mAppBarLayout = findViewById(R.id.app_bar);mTabView = findViewById(R.id.tab_layout);mViewPager = findViewById(R.id.view_pager);mHeaderLl = findViewById(R.id.ll_header);mFotterLl = findViewById(R.id.ll_fotter);refreshView.setRefreshHeader(new TodayNewsHeader(this));addProductBeans();getData(); } private void addListener() {mAppBarLayout.addOnOffsetChangedListener(offsetChangedListener);refreshView.setOnRefreshListener(new OnRefreshListener() { @Override public void onRefresh(@NonNull RefreshLayout refreshLayout) {loadData(); }}); } private void loadData() {refreshView.postDelayed(new Runnable() { @Override public void run() {refreshView.finishRefresh();refreshView.setEnabled(true); }}, 800); } // 這里的處理是當AppBarLayout處于最頂部也就是完全打開狀態verticalOffse=0時才允許刷新控件可用. private AppBarLayout.OnOffsetChangedListener offsetChangedListener = new AppBarLayout.OnOffsetChangedListener() { @Overridepublic void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffse) { totalScrollRange = appBarLayout.getTotalScrollRange(); if (oldVerticalOffset == verticalOffse) return; if (verticalOffse == 0) {refreshView.setEnabled(true); } else {refreshView.setEnabled(false); } if (verticalOffse <= -Utils.dp2px(40)) {mFloatSearchRl.setVisibility(View.VISIBLE); } else {mFloatSearchRl.setVisibility(View.GONE); } if (Math.abs(verticalOffse) >= totalScrollRange && totalScrollRange != 0) {mTabView.setBackgroundColor(getResources().getColor(R.color.white_color)); } else {mTabView.setBackgroundColor(getResources().getColor(R.color.background_color)); } oldVerticalOffset = verticalOffse;} }; public void getData() {mHeaderLl.removeAllViews();mFotterLl.removeAllViews();addTopView();addBannerView(); addBannerTab(); addBottom(); // addRecommendView(); // addFeaturedView(); 圖片initViewpager(); } private void addBannerTab() {View mTopView = getLayoutInflater().inflate(R.layout.activity_two, mHeaderLl, false);lineParent = mTopView.findViewById(R.id.rl_line_parent);lineChild = mTopView.findViewById(R.id.view_line_child);mLayoutManager = new PagerGridLayoutManager(mRows, mColumns, PagerGridLayoutManager.HORIZONTAL);// 系統帶的 RecyclerView，無需自定義mRecyclerView =mTopView.findViewById(R.id.recycler_view);// 水平分頁布局管理器mLayoutManager.setPageListener(this); // 設置頁面變化監聽器mRecyclerView.setLayoutManager(mLayoutManager);// 如果需要查看調試日志可以設置為true，一般情況忽略即可PagerConfig.setShowLog(true);initData(); mHeaderLl.addView(mTopView); } private void initData() {List<String> list = new ArrayList<>();for (int i = 0; i < 16; i++) { list.add(names[i]);}// mAdapter.refreshDataList(list);// 使用原生的 Adapter 即可mAdapter = new MyAdapter2(MainActivity.this, list);mRecyclerView.setAdapter(mAdapter); } private void addTopView() {View mTopView = getLayoutInflater().inflate(R.layout.top_view_layout, mHeaderLl, false); mHeaderLl.addView(mTopView); } private void addBottom() {View mTopView = getLayoutInflater().inflate(R.layout.bottom_layout, mFotterLl, false);iv_icon_bottom = mTopView.findViewById(R.id.iv_icon_bottom);rl_cancel_bottom= mTopView.findViewById(R.id.rl_cancel_bottom);iv_icon_bottom.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) {Log.e('TAG','click iv_icon_bottom '); }});rl_cancel_bottom.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) {Log.e('TAG','click cancel'); }}); mFotterLl.addView(mTopView); } private void addBannerView() {View mBannerView = getLayoutInflater().inflate(R.layout.banner_layout, mHeaderLl, false);Banner mBanner = mBannerView.findViewById(R.id.banner); ArrayList<ProductBean> list = new ArrayList<>();for (int i = 0; i < 3; i++) { list.add(new ProductBean('三會一課','2','會議',R.mipmap.ic_launcher));} mBanner.addBannerLifecycleObserver(this).setAdapter(new MyBannerAdapter(list)).setIndicator(new CircleIndicator(this)).setIndicatorGravity(IndicatorConfig.Direction.RIGHT).start(); mHeaderLl.addView(mBannerView); } private void addRecommendView() {RecyclerView mRecyclerView = new RecyclerView(this); GridLayoutManager gridLayoutManager = new GridLayoutManager(this, 6);mRecyclerView.setLayoutManager(gridLayoutManager); RecommendAdapter adapter = new RecommendAdapter(list);adapter.setOnItemChildClickListener(new BaseQuickAdapter.OnItemChildClickListener() { @Override public void onItemChildClick(BaseQuickAdapter adapter, View view, int position) {ProductBean productBean = (ProductBean) adapter.getItem(position);Toast.makeText(MainActivity.this, productBean.getName(), Toast.LENGTH_SHORT).show(); }}); mRecyclerView.setAdapter(adapter);RecyclerViewDivider divider = new RecyclerViewDivider.Builder(this).setStyle(RecyclerViewDivider.Style.BOTH).setColor(0x00000000).setOrientation(RecyclerViewDivider.GRIDE_VIW).setSize(5).build();mRecyclerView.addItemDecoration(divider); mHeaderLl.addView(mRecyclerView); } private void addFeaturedView() {View view = getLayoutInflater().inflate(R.layout.featured_layout, mHeaderLl, false);mHeaderLl.addView(view); } private void initViewpager() {if (fragmentList == null) { fragmentList = new ArrayList<>();} else { fragmentList.clear();} for (int i = 0; i < titles.length; i++) { fragmentList.add(new HomeFragment(list));} fragmentAdapter = new HomeViewPagerAdapter(getSupportFragmentManager(), fragmentList);mViewPager.setAdapter(fragmentAdapter);mTabView.setOnTabSelectListener(onTabSelectListener);mViewPager.addOnPageChangeListener(onPageChangeListener); mTabView.setViewPager(mViewPager, titles); } private OnTabSelectListener onTabSelectListener = new OnTabSelectListener() {@Overridepublic void onTabSelect(int position) { mTabView.setCurrentTab(position);} @Overridepublic void onTabReselect(int position) {} }; private ViewPager.OnPageChangeListener onPageChangeListener = new ViewPager.OnPageChangeListener() {@Overridepublic void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {} @Overridepublic void onPageSelected(int position) { mTabView.setCurrentTab(position);} @Overridepublic void onPageScrollStateChanged(int state) {} }; /** * 控制appbar的滑動 * * @param isScroll true 允許滑動 false 禁止滑動 */ private void banAppBarScroll(boolean isScroll) {View mAppBarChildAt = mAppBarLayout.getChildAt(0);AppBarLayout.LayoutParams mAppBarParams = (AppBarLayout.LayoutParams) mAppBarChildAt.getLayoutParams();if (isScroll && mAppBarParams.getScrollFlags() == 0) { mAppBarParams.setScrollFlags(AppBarLayout.LayoutParams.SCROLL_FLAG_SCROLL | AppBarLayout.LayoutParams.SCROLL_FLAG_EXIT_UNTIL_COLLAPSED); mAppBarChildAt.setLayoutParams(mAppBarParams);} else if (mAppBarParams.getScrollFlags() != 0) mAppBarParams.setScrollFlags(0); } /** * 控制appbar的開關 * 需要手動開關時調用 * * @param open true 打開 false 關閉 */ public void switchAppbarLayout(boolean open) {CoordinatorLayout.Behavior behavior = ((CoordinatorLayout.LayoutParams) mAppBarLayout.getLayoutParams()).getBehavior();if (behavior instanceof AppBarLayout.Behavior) { AppBarLayout.Behavior appBarLayoutBehavior = (AppBarLayout.Behavior) behavior; int topAndBottomOffset = appBarLayoutBehavior.getTopAndBottomOffset(); if (open && topAndBottomOffset != 0) {//打開appBarLayoutBehavior.setTopAndBottomOffset(0); } else if (!open) {//關閉if (totalScrollRange == 0) totalScrollRange = mAppBarLayout.getHeight();appBarLayoutBehavior.setTopAndBottomOffset(-totalScrollRange); }} } private void addProductBeans() {for (int i = 0; i < 10; i++) { list.add(new ProductBean('智慧美食','2','美食',R.mipmap.ic_launcher));} } @Override public void onPageSizeChanged(int pageSize) {mTotal = pageSize;Log.e('TAG', '總頁數 = ' + pageSize); } @Override public void onPageSelect(int pageIndex, int pageSize) {mCurrent = pageIndex;Log.e('TAG', '選中頁碼 = ' + pageIndex + 't' + pageSize);//計算滾動條寬度float proportion = (float) ((pageIndex + 1) / pageSize);float transMaxRange = lineParent.getWidth() - lineChild.getWidth();//設置滾動條移動lineChild.setTranslationX(transMaxRange * proportion); }}

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