Android关于RecyclerView设置选中效果和AndroidTV Item选中效果

Android关于RecyclerView设置选中效果

项目里需求2级菜单，要设置recyclerview高亮.

代码块

点击事情里面设置：

nAdapter.refreshItem(position);

adapter里面自定义

private int selectedPos = -1;private int oldPos = -1;getView(ViewHolder helper) {    if(selectedPos == helper.getPosition()) {        //相同设置高亮    } else {        //不同设置    }}public void refreshItem(int position) {    if (selectedPos != -1) {        oldPos  = selectedPos;    }    selectedPos = position;    if (oldPos != -1) {        notifyItemChanged(oldPos);    }    notifyItemChanged(selectedPos);}

AndroidTV Item选中效果

最近看了谷歌TV的adapter，感觉很有意思：

public class CardPresenter extends Presenter {private static final String TAG = "CardPresenter";private static final int CARD_WIDTH = 313;private static final int CARD_HEIGHT = 176;private static int sSelectedBackgroundColor;private static int sDefaultBackgroundColor;private Drawable mDefaultCardImage;private static void updateCardBackgroundColor(ImageCardView view, boolean selected) {    int color = selected ? sSelectedBackgroundColor : sDefaultBackgroundColor;    //这里还可以设置选中放大 失去焦点缩小    view.setBackgroundColor(color);    view.findViewById(R.id.info_field).setBackgroundColor(color);}@Overridepublic ViewHolder onCreateViewHolder(ViewGroup parent) {    Log.d(TAG, "onCreateViewHolder");    sDefaultBackgroundColor = parent.getResources().getColor(R.color.default_background);    sSelectedBackgroundColor = parent.getResources().getColor(R.color.selected_background);    mDefaultCardImage = parent.getResources().getDrawable(R.drawable.movie);    ImageCardView cardView = new ImageCardView(parent.getContext()) {        @Override        public void setSelected(boolean selected) {            updateCardBackgroundColor(this, selected);            super.setSelected(selected);        }    };    cardView.setFocusable(true);    cardView.setFocusableInTouchMode(true);    updateCardBackgroundColor(cardView, false);    return new ViewHolder(cardView);}@Overridepublic void onBindViewHolder(ViewHolder viewHolder, Object item) {    Movie movie = (Movie) item;    ImageCardView cardView = (ImageCardView) viewHolder.view;    if (movie.getImgUrl() != null) {        cardView.setTitleText(movie.getName());        cardView.setContentText(movie.getContent());        cardView.setMainImageDimensions(CARD_WIDTH, CARD_HEIGHT);        Glide.with(viewHolder.view.getContext())                .load(movie.getImgUrl())                .centerCrop()                .error(mDefaultCardImage)                .into(cardView.getMainImageView());    } else {        cardView.setTitleText("woo");        cardView.setContentText("hiiiiii");        cardView.setMainImageDimensions(CARD_WIDTH, CARD_HEIGHT);    }}@Overridepublic void onUnbindViewHolder(ViewHolder viewHolder) {     Log.d(TAG, "onUnbindViewHolder");     ImageCardView cardView = (ImageCardView) viewHolder.view;     // Remove references to images so that the garbage collector can free up memory     cardView.setBadgeImage(null);     cardView.setMainImage(null);     cardView.setBadgeImage(null);     cardView.setMainImage(null)；    }}

把present改造成adapter即可。
这个最好配合谷歌的android.support.v17.leanback.widget.HorizontalGridView和VerticalGridView使用。

Android关于RecyclerView 设置选中效果和AndroidTV Item选中效果

Android关于RecyclerView设置选中效果和AndroidTV Item选中效果

Android关于RecyclerView设置选中效果

代码块

AndroidTV Item选中效果

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