Android Material風格的應用(二)--RecyclerView

添加RecyclerView

Android Material風格的應用(一)--AppBar TabLayout
Android Material風格的應用(二)--RecyclerView
Android Material風格的應用(三)--DrawerLayout
Android Material風格的應用(四)--FloatActionButton
Android Material風格的應用(五)--CollapsingToolbar

工程源碼 添加對應的支持庫

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 分別建立各自的ContentAdapter,在onCreateView方法中初始化RecyclerView相關的內容

@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);
  }

}