Question

我正在尝试更改所选行中ImageView的可见性。基本上我想表现当用户点击一行，ImageView显示在该行并隐藏其他ImageViews，当用户点击另一行时，它将ImageView的可行性切换到该行并隐藏另一个ImageView之前点击的行。

继承我的recyclerview适配器中的代码。我目前在单击的行上显示ImageView但它当前不会隐藏其他行中的其他ImageViews！

public void onBindViewHolder(final PreGameSelectRecyclerAdapter.MyViewHolder holder, int position) {
    holder.itemView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            if (holder.isSelected.getVisibility() == View.INVISIBLE) {
                holder.isSelected.setVisibility(View.VISIBLE);
            } else {
                holder.isSelected.setVisibility(View.INVISIBLE);
            }
        }
    });
}

Answer 1

您需要在回收的视图数据集中添加属性，以跟踪可见和隐藏的图像。

我把这个例子给你做了你想做的事。

public class RecyclerViewActivity extends AppCompatActivity { 

private RecyclerView recycler;

@Override 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_recycler_view);
    initView(); 

    List<Item> items = Arrays.asList(
            new Item("1", false), 
            new Item("2", false), 
            new Item("3", false), 
            new Item("4", false), 
            new Item("5", false), 
            new Item("6", false), 
            new Item("7", false), 
            new Item("8", false), 
            new Item("9", false), 
            new Item("10", false), 
            new Item("11", false), 
            new Item("12", false), 
            new Item("13", false), 
            new Item("14", false), 
            new Item("15", false), 
            new Item("16", false), 
            new Item("17", false) 
    ); 

    recycler.setAdapter(new ContactsAdapter(items));
    recycler.setLayoutManager(new LinearLayoutManager(this));

} 


class ContactsAdapter extends RecyclerView.Adapter<ContactsAdapter.ViewHolder> { 
    private List<Item> mItems;

    public ContactsAdapter(List<Item> items) {
        mItems = items;
    } 

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

    @Override 
    public void onBindViewHolder(ViewHolder holder, int position) {
        holder.bind(position);
    } 

    @Override 
    public int getItemCount() { 
        return mItems.size();
    } 

    class ViewHolder extends RecyclerView.ViewHolder { 
        TextView mTextView;
        ImageView mImageView;

        ViewHolder(View itemView) {
            super(itemView);

            mTextView = (TextView) itemView.findViewById(R.id.textView);
            mImageView = (ImageView) itemView.findViewById(R.id.imageView);
        } 

        void bind(int position) {
            final Item item = mItems.get(position);
            mTextView.setText(item.getText());

            itemView.setOnClickListener(new View.OnClickListener() {
                @Override 
                public void onClick(View v) {
                    for (Item item1 : mItems) {
                        item1.setImageVisible(false);
                    } 
                    item.setImageVisible(true);

                    notifyDataSetChanged(); 
                } 
            }); 

            if (item.isImageVisible) mImageView.setVisibility(View.VISIBLE);
            else mImageView.setVisibility(View.INVISIBLE);
        } 
    } 
} 


class Item { 
    private String text;
    private boolean isImageVisible;

    public Item(String text, boolean isImageVisible) {
        this.setText(text);
        this.setImageVisible(isImageVisible);
    } 


    public String getText() {
        return text;
    } 

    public void setText(String text) {
        this.text = text;
    } 

    public boolean isImageVisible() { 
        return isImageVisible;
    } 

    public void setImageVisible(boolean imageVisible) {
        isImageVisible = imageVisible;
    } 
} 

private void initView() { 
    recycler = (RecyclerView) findViewById(R.id.recycler);
} 


}

从RecyclerView中的某些行更改ImageView可见性

1 个答案: