Android中featuredrecyclerview的使用

featuredrecyclerview是自定义ViewGroup的reyclerview延伸了。它具有的第一个item是在顶部（通过设置高度为featureditemheight）。 感觉很好！

https://github.com/developer-shivam/FeaturedRecyclerView

效果图：

添加依赖：

compile 'com.github.developer-shivam:FeaturedRecyclerView:1.0.0'

xml中使用：

<shivam.developer.featuredrecyclerview.FeaturedRecyclerView    android:id="@+id/featuredRecyclerView"    android:layout_width="match_parent"    android:layout_height="match_parent"    app:defaultItemHeight="120dp"    app:featuredItemHeight="300dp" />

在Activity中使用：

public class MainActivity extends AppCompatActivity {    private FeaturedRecyclerView featuredRecyclerView;    private CustomRecyclerViewAdapter customRecyclerViewAdapter;    private List<String> list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        list = new ArrayList<>();        featuredRecyclerView = (FeaturedRecyclerView) findViewById(R.id.featuredRecyclerView);//你必须使用featuredlinearlayoutmanager避免闪烁。        FeatureLinearLayoutManager featureLinearLayoutManager = new FeatureLinearLayoutManager(this);        featuredRecyclerView.setLayoutManager(featureLinearLayoutManager);        for (int i = 0; i < 30; i++) {            list.add("item " + i);        }        customRecyclerViewAdapter = new CustomRecyclerViewAdapter(this, list);        featuredRecyclerView.setAdapter(customRecyclerViewAdapter);    }}

CustomRecyclerViewAdapter中：

public class CustomRecyclerViewAdapter extends FeatureRecyclerViewAdapter<CustomRecyclerViewAdapter.CustomRecyclerViewHolder> {    private List<String> dataList;    private Context context;    private int[] images = new int[5];    public CustomRecyclerViewAdapter(Context context, List<String> list) {        this.dataList = list;        this.context = context;        images[0] = R.drawable.image_one;        images[1] = R.drawable.image_three;        images[2] = R.drawable.image_two;        images[3] = R.drawable.image_four;        images[4] = R.drawable.image_five;    }    @Override    public CustomRecyclerViewHolder onCreateFeaturedViewHolder(ViewGroup parent, int viewType) {        return new CustomRecyclerViewHolder(                LayoutInflater.from(parent.getContext())                        .inflate(R.layout.simple_reycler_view_layout, parent, false));    }    @Override    public void onBindFeaturedViewHolder(CustomRecyclerViewHolder holder, int position) {        Picasso.with(context)                .load(images[position % 4]).into(holder.ivBackground);        holder.tvHeading.setText(dataList.get(position));    }    @Override    public int getFeaturedItemsCount() {        return dataList.size();    }//使用featuredrecyclerviewadapter优点在于它包含两个以上的方法（onSmallItemResize、onBigItemResize）可以用来制作动画的属性的属性    @Override    public void onSmallItemResize(CustomRecyclerViewHolder holder, int position, float offset) {        holder.tvHeading.setAlpha(offset / 100f);    }    @Override    public void onBigItemResize(CustomRecyclerViewHolder holder, int position, float offset) {        holder.tvHeading.setAlpha(offset / 100f);    }    public static class CustomRecyclerViewHolder extends RecyclerView.ViewHolder {        ImageView ivBackground;        TextView tvHeading;        public CustomRecyclerViewHolder(View itemView) {            super(itemView);            ivBackground = (ImageView) itemView.findViewById(R.id.iv_background);            tvHeading = (TextView) itemView.findViewById(R.id.tv_heading);        }    }}

simple_reycler_view_layout.xml：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="150dp"    android:orientation="vertical">    <ImageView        android:id="@+id/iv_background"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:scaleType="centerCrop" />    <View        android:layout_width="match_parent"        android:layout_height="match_parent"        android:background="@drawable/shadow_inverse" />    <TextView        android:id="@+id/tv_heading"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerInParent="true"        android:background="@drawable/text_background"        android:paddingBottom="5dp"        android:paddingLeft="10dp"        android:paddingRight="10dp"        android:paddingTop="5dp"        android:textColor="@android:color/white"        android:textSize="20sp" /></RelativeLayout>

demo地址：

http://download.csdn.net/detail/afanbaby/9877639

本人菜鸟一个，有什么不对的地方希望大家指出评论，大神勿喷，希望大家一起学习进步！