Android Material风格的应用(二)--RecyclerView

添加RecyclerView

Android Material风格的应用(一)--AppBar TabLayout
Android Material风格的应用(二)--RecyclerView
Android Material风格的应用(三)--DrawerLayout
Android Material风格的应用(四)--FloatActionButton
Android Material风格的应用(五)--CollapsingToolbar

RecyclerView

工程源码
添加对应的支持库

  compile 'com.android.support:recyclerview-v7:24.2.1'
  compile 'com.android.support:cardview-v7:24.2.1'

添加 res/layout/recycler_view.xml

  <android.support.v7.widget.RecyclerView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/recycler_view"
    android:clipToPadding="false"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:scrollbars="vertical"
    app:layout_behavior="@string/appbar_scrolling_view_behavior">
  </android.support.v7.widget.RecyclerView>

在ListContentFragment.java TileContentFragment.java 和 CardContentFragment.java中
分别创建各自的ContentAdapter,在onCreateView方法中初始化RecyclerView相关的内容

  @Override
  public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
      RecyclerView recyclerView = (RecyclerView)inflater.inflate(R.layout.recycler_view,container,false);
      ContentAdapter adapter = new ContentAdapter(recyclerView.getContext());
      recyclerView.setAdapter(adapter);
      recyclerView.setHasFixedSize(true);
      recyclerView.setLayoutManager(new GridLayoutManager(getActivity(),2));
      return recyclerView;
  }

  public static class ViewHolder extends RecyclerView.ViewHolder{
    public ImageView imageView;
    public TextView textView;
    public ViewHolder(LayoutInflater inflater,ViewGroup parent) {
        super(inflater.inflate(R.layout.item_tile,parent,false));
        imageView = (ImageView)itemView.findViewById(R.id.title_picture);
        textView = (TextView)itemView.findViewById(R.id.title_title);
    }
  }

  public static class ContentAdapter extends RecyclerView.Adapter<ViewHolder>{
    private static final int LENGTH = 18;
    private String[] names;
    private Drawable[] avatars;

    public ContentAdapter(Context context) {
        Resources resources = context.getResources();
        names = resources.getStringArray(R.array.places);
        TypedArray a = resources.obtainTypedArray(R.array.places_picture);
        avatars = new Drawable[a.length()];
        for(int i = 0;i<a.length();i++){
            avatars[i] = a.getDrawable(i);
        }
        a.recycle();
    }

    @Override
    public int getItemCount() {
        return LENGTH;
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.imageView.setImageDrawable(avatars[position % avatars.length]);
        holder.textView.setText(names[position % names.length]);
    }

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        return new ViewHolder(LayoutInflater.from(parent.getContext()),parent);
    }

  }