Android开发常遇页面布局之一

今天起把项目中写过的复杂的，简单的页面布局写一下，一方面给需要的人参考，另一方面加强自身熟练。

当我们拿到这样的一个效果图之后，要分析这个布局中存在哪些难点与冲突点，一般来说的话，所谓冲突无非就是控件使用的时候，执行类似的命令会达不到我们想要的效果，所以以上的图，我首先的想法是RecyclerView+ ScrollView，但是之前用过几次后发现滑动会产生很多冲突，所以我推荐使用Recyclerview+headerview的方式进行代码编写。

头布局及列表如下：

这样我们就可以轻松的使用RecyclerView啦。

适配器代码如下：
PRivate class GoodsAdapter extends RecyclerView.Adapter {        private  WeakReference<IntegralActivity> mReference;        private LayoutInflater mInflater;        private List<Goodlist> goodlist;        private final int POSITION_TOP = 1;        private final int POSITION_SINGLE = 2;        private List<BannerList> banlist;        private GoodsAdapter(IntegralActivity activity) {            mReference = new WeakReference<>(activity);            goodlist = new ArrayList<>();            banlist = new ArrayList<>();            if (mReference.get() != null) {                mInflater = mReference.get().getLayoutInflater();                goodlist = mReference.get().list;                banlist = mReference.get().bannerList;            }        }        @Override        public int getItemViewType(int position) {            if (position == 0)                return POSITION_TOP;            else                return POSITION_SINGLE;        }        @Override        public int getItemCount() {            return goodlist.size() + 1;        }        @Override        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {            IntegralActivity activity = mReference.get();            if (activity != null) {                //头部viewpager                if (viewType == POSITION_TOP) {                    View view = mInflater.inflate(R.layout.item_viewpager,null);                    TopViewHolder topViewHolder = new TopViewHolder(view);                    topViewHolder.mViewPager = (AutoScrollViewPager) view.findViewById(R.id.viewpager_item);                    topViewHolder.mIntagels = (TextView) view.findViewById(R.id.my_intagel_item);                    topViewHolder.mFind = (TextView) view.findViewById(R.id.find_intage);                    topViewHolder.mFirst = (TextView) view.findViewById(R.id.tv_first);                    topViewHolder.mAll = (TextView) view.findViewById(R.id.tv_all);                    topViewHolder.mLin = (RelativeLayout) view.findViewById(R.id.item_lin);                    return topViewHolder;                } else {                    View view = mInflater.inflate(R.layout.item_goods,null);                    MainViewHolder holder = new MainViewHolder(view);                    holder.mContent = (TextView) view.findViewById(R.id.content_item);                    holder.mIntegal = (TextView) view.findViewById(R.id.inteali_item);                    holder.mPrice = (TextView) view.findViewById(R.id.price_item);                    holder.mPic = (ImageView) view.findViewById(R.id.goods_pic_item);                    return holder;                }            }            return null;        }        // banner adapter        class ImageAdapter extends PagerAdapter {            @Override            public int getCount() {                if (banlist.size() == 0 || banlist.size() == 1) {                    return 1;                } else {                    return Integer.MAX_VALUE;                }            }            @Override            public Object instantiateItem(ViewGroup container, final int position) {                ImageView imageView = null;                imageView = new ImageView(mBaseActivity);                imageView.setScaleType(ImageView.ScaleType.FIT_XY);                // 加载图片                if (banlist.size() == 0) {                    imageView.setImageResource(R.mipmap.error_top);                } else {                    Glide.with(mBaseActivity).load(banlist.get(position % banlist.size()).getPicurl()).error(R.mipmap.error_top).fitCenter().into(imageView);                }                container.addView(imageView);                return imageView;            }            @Override            public void destroyItem(ViewGroup container, int position, Object object) {                ((ViewPager) container).removeView((View) object);            }            @Override            public boolean isViewFromObject(View arg0, Object arg1) {                return arg0 == arg1;            }        }        @Override        public void onBindViewHolder(final RecyclerView.ViewHolder holder, final int position) {            IntegralActivity activity = mReference.get();            if (activity != null) {                if (holder instanceof TopViewHolder) {                   TopViewHolder topholder = (TopViewHolder) holder;                    ImageAdapter mImageAdapter = new ImageAdapter();                    if (topholder.mViewPager != null)                        topholder.mViewPager.setAdapter(mImageAdapter);                    //若数据大小超过1，设置 自动轮播 若只有一张则不轮播，且不显示角标                    if (banlist.size() > 1) {                        topholder.mLin.setVisibility(View.VISIBLE);                       // topholder.mViewPager.startAutoScroll();                        topholder.mFirst.setText(1 + "");                    } else {                        topholder.mLin.setVisibility(View.INVISIBLE);                    }                    TopViewHolder topViewHolder = (TopViewHolder) holder;                    topViewHolder.mFind.setOnClickListener(new View.OnClickListener() {                        @Override                        public void onClick(View v) {                            startActivity(new Intent(getapplicationContext(),IntegralWaterActivity.class));                        }                    });                    topholder.mViewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {                        @Override                        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {                        }                        @Override                        public void onPageSelected(int position) {                            ((TopViewHolder) holder).mFirst.setText((position + 1) + "");                        }                        @Override                        public void onPageScrollStateChanged(int state) {                        }                    });                    topholder.mAll.setText(banlist.size() + "");                } else {                    MainViewHolder mainViewHolder = (MainViewHolder) holder;                    mainViewHolder.mPrice.setText("价值"+goodlist.get(position -1).getPricedis());                    mainViewHolder.mContent.setText("价值"+goodlist.get(position -1).getListname());                    mainViewHolder.mIntegal.setText("价值"+goodlist.get(position -1).getNeedpoint());                    if (goodlist.get(position- 1).getListpicurl() != null){                        Glide.with(getApplicationContext()).load(goodlist.get(position - 1).getListpicurl()).placeholder(R.mipmap.error_goods).error(R.mipmap.error_goods).into(mainViewHolder.mPic);                    }                    mainViewHolder.itemView.setOnClickListener(new View.OnClickListener() {                        @Override                        public void onClick(View v) {                            Intent intent = new Intent(getApplicationContext(),GoodsDetailsActivity.class);                            intent.putExtra("id",String.valueOf(goodlist.get(position).getGoodsid()));                            startActivity(intent);                        }                    });                }            }        }        @Override        public void onAttachedToRecyclerView(RecyclerView recyclerView) {            super.onAttachedToRecyclerView(recyclerView);            RecyclerView.LayoutManager manager = recyclerView.getLayoutManager();            if(manager instanceof GridLayoutManager) {                final GridLayoutManager gridManager = ((GridLayoutManager) manager);                gridManager.setSpanSizeLookup(new GridLayoutManager.SpanSizeLookup() {                    @Override                    public int getSpanSize(int position) {                        return getItemViewType(position) == POSITION_TOP                                ? gridManager.getSpanCount() : 1;                    }                });            }        }        //主体        private class MainViewHolder extends RecyclerView.ViewHolder {            public MainViewHolder(View itemView) {                super(itemView);            }            private TextView mPrice,mIntegal,mContent;            private ImageView mPic;        }        /**         * 顶部 ViewHolder         */        private class TopViewHolder extends RecyclerView.ViewHolder {            private TopViewHolder(View itemView) {                super(itemView);            }            private AutoScrollViewPager mViewPager;            private TextView mIntagels,mFind , mFirst,mAll;            private RelativeLayout mLin;        }    }  根据
getItemViewType这个方法来显示不同的布局，有不懂可以问我撒，陆续会贡献在实际开发过程中用到的布局方式及控件的使用。