Question

我尝试为单击的“回收者”视图上的按钮着色。

public class OneActiveButtonAdapter 
        extends RecyclerView.Adapter<OneActiveButtonAdapter.ViewHolder> {

    public class ViewHolder extends RecyclerView.ViewHolder 
            implements View.OnClickListener {

        private Button button;
        private WeakReference<ClickListener> listenerWR;


        ViewHolder(View view, ClickListener listener) {
            super(view);
            button = view.findViewById(R.id.button);
            button.setBackgroundColor(Color.WHITE);
            listenerWR = new WeakReference<>(listener);
        }

        @Override
        public void onClick(View view) {
            Log.d("PRESSED", "BUTTON IS PRESSED");
        }
    }

    public interface ClickListener {
        void onPositionClicked(int position);
    }

    private ClickListener clickListener;
    private List<Payable> buttons;
    private int indexOfActivatedButton = -1;

    public OneActiveButtonAdapter(List<Payable> buttons, ClickListener clickListener) {
        this.buttons = buttons;
        this.clickListener = clickListener;
    }

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

    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int ind) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.buttons_linear_layout,
                parent, false);
        return new ViewHolder(view, clickListener);
    }

    @Override
    public void onBindViewHolder(ViewHolder viewHolder, int ind) {
        viewHolder.button.setText(buttons.get(ind).getTitle());
        if (indexOfActivatedButton == ind) {
            viewHolder.button.setBackgroundColor(Color.GREEN);
        } else {
            viewHolder.button.setBackgroundColor(Color.WHITE);
        }
    }
}

'''

还有代码，当我为'''RecyclerView'''创建适配器时：

'''

OneActiveButtonAdapter foodRVAdapter = new OneActiveButtonAdapter(food,
        new OneActiveButtonAdapter.ClickListener() {
            @Override
            public void onPositionClicked(int position) {
                Log.d("POSITION", String.valueOf(position));
            }
        });

'''

当我尝试单击RecyclerView上的某些按钮时，我希望看到日志，但不会输出。我也尝试为按钮设置setOnClickListener，但是它并没有改变。这可能是什么麻烦？

Answer 1

因为您没有将listener设置为按钮。

删除listenerWR = new WeakReference<>(listener);

并尝试使用此button.setOnClickListener(this);

希望这会有所帮助。

尝试在RecyclerView中使用onClick，但它不起作用

1 个答案: