Android项目实战之仿网易新闻的页面（RecyclerView ）

 /** * 新闻列表的适配器 * 01-14 头部是 ViewPager，下面是列表新闻 * Created by tomchen on 1/11/16. */ public class ArticleAdapter extends RecyclerView.Adapter { private static final int TYPE_HEADER = 0; private static final int TYPE_ITEM = 1; //头部固定为 张图片 private static final int NUM_IMAGE = 4; //Handler 用到的参数值 private static final int UPTATE_VIEWPAGER = 0; //新闻列表 private List articleList; //设置当前 第几个图片 被选中 private int currentIndex = 0; //context private Context context; private LayoutInflater mLayoutInflater; private ImageView[] mCircleImages;//底部只是当前页面的小圆点 public ArticleAdapter(Context context, List articleList) { this.context = context; //头部viewpager图片固定是7张，剩下的是列表的数据 this.articleList = articleList; mLayoutInflater = LayoutInflater.from(context); } @Override public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { //理论上应该把最可能返回的 TYPE 放在前面 View view = null; if (viewType == TYPE_ITEM) { view = mLayoutInflater.inflate( R.layout.viewholder_article_item, parent, false); return new ItemArticleViewHolder(view); } //头部返回 ViewPager 实现的轮播图片 if (viewType == TYPE_HEADER) { view = mLayoutInflater.inflate( R.layout.viewholder_article_header, parent, false); return new HeaderArticleViewHolder(view); } return null; //  //可以抛出异常，没有对应的View类型 //  throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly"); } @Override public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { if (holder instanceof ItemArticleViewHolder) { //转型 ItemArticleViewHolder newHolder = (ItemArticleViewHolder) holder; //注意RecyclerView第0项是 ViewPager 占据了0 1 2 3图片 //那么下面的列表展示是 RecyclerView 的第1项，从第4项开始 ItemArticle article = articleList.get(position + NUM_IMAGE - 1); newHolder.rcvArticlePhoto.setImageURI(Uri.parse(article.getImageUrl())); newHolder.rcvArticleTitle.setText(article.getTitle()); newHolder.rcvArticleDate.setText(article.getPublishDate()); newHolder.rcvArticleSource.setText(article.getSource()); //注意这个阅读次数是 int 类型，需要转化为 String 类型 newHolder.rcvArticleReadtimes.setText(article.getReadTimes() + "次"); newHolder.rcvArticlePreview.setText(article.getPreview()); } else if (holder instanceof HeaderArticleViewHolder) { HeaderArticleViewHolder newHolder = (HeaderArticleViewHolder) holder; List headers = articleList.subList(0, NUM_IMAGE ); HeaderImageAdapter imageAdapter = new HeaderImageAdapter(context, headers); setUpViewPager(newHolder.vpHottest, newHolder.llHottestIndicator, headers); } } private void setUpViewPager(final ViewPager vp, LinearLayout llBottom, final List headerArticles) { HeaderImageAdapter imageAdapter = new HeaderImageAdapter(context, headerArticles); //??这儿有些疑惑，Adapter 里面嵌套设置 Adapter 是否优雅？ vp.setAdapter(imageAdapter); final Handler mHandler = new Handler() { public void handleMessage(Message msg) { switch (msg.what) { case UPTATE_VIEWPAGER: if (msg.arg1 != 0) { vp.setCurrentItem(msg.arg1); } else { //false 当从末页调到首页是，不显示翻页动画效果， vp.setCurrentItem(msg.arg1, false); } break; } } }; //下面是设置动画切换的样式 vp.setPageTransformer(true, new RotateUpTransformer()); //创建底部指示位置的导航栏 final ImageView[] mCircleImages = new ImageView[headerArticles.size()]; for (int i = 0; i