android - RecyclerView中的单个RadioButton

Question

我有一个仅包含RadioButton的物品的RecyclerView,我的适配器创建了一些位置的RecyclerView - 可以在每个位置使用RadioButton 5-10个位置.但是这些RadioButton不在同一个RadioGroup中,因为它们都处于不同的RecyclerView位置.有没有办法为它设置单一选择？

PS:我发现这只在recyclerview中选择了一个radiobutton,但它完全是关于RecyclerView位置的RadioGroups,我只有RadioButtons.

Answer 1

您可以通过创建带boolean变量的模型类来管理它isChecked.

当你选择RadioButton第一个isChecked = false为所有人做,然后为你选择的按钮生效,然后打电话notifyDataSetChanged.

在适配器使用

radioButton.setChecked(list.get(position).isChecked())

它肯定会帮到你.

Answer 2

我有同样的问题。根据 Vishal Chhodwani 的回答，我写了以下解决方案，希望它可以帮助其他读者。

class MyRecycler extends RecyclerView.Adapter<MyRecycler.RecyclerViewHolder> {

    static class RecyclerViewHolder extends RecyclerView.ViewHolder {
        @BindView(R.id.aRadioButton)
        RadioButton rb;

        public RecyclerViewHolder(View itemView, int viewType, final Context context) {
            super(itemView);
            ButterKnife.bind(this, itemView);
        } 
    }

    private List<MyModel> list;
    private RadioButton selectedRadioButton;  

    // Constructor and other methods here...

    @Override
    public void onBindViewHolder(final MyRecycler.RecyclerViewHolder holder, int position) {

        RadioButton radioButton = holder.rb;
        radioButton.setChecked(list.get(position).isChecked());

        radioButton.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                // Set unchecked all other elements in the list, so to display only one selected radio button at a time 
                for(MyModel model: list)
                    model.setChecked(false);

                // Set "checked" the model associated to the clicked radio button
                list.get(position).setChecked(true);

                // If current view (RadioButton) differs from previous selected radio button, then uncheck selectedRadioButton
                if(null != selectedRadioButton && !v.equals(selectedRadioButton))
                    selectedRadioButton.setChecked(false);

                // Replace the previous selected radio button with the current (clicked) one, and "check" it
                selectedRadioButton = (RadioButton) v;
                selectedRadioButton.setChecked(true);                    

        });
    }
}