android RadioGroup 多行多列

android RadioGroup 默认是单行的，要多行只能用多个 RadioGroup, 然后自己控制各组互斥

仅供参考

public class RadioInputPopup extends PopupWindow {
    private static final int DEFAULT_COLS = 3; // 默认3列
    private Context context;
    private List<Item> items;

    private RadioGroup[] radioGroups;
    private OnRadioCheckedChanged onRadioCheckedChanged;

    public RadioInputPopup(Context context, @NonNull List<Item> items, OnRadioCheckedChanged onRadioCheckedChanged) {
        this.context = context;
        this.items = items;
        this.onRadioCheckedChanged = onRadioCheckedChanged;

        setWidth(LinearLayout.LayoutParams.WRAP_CONTENT);
        setHeight(LinearLayout.LayoutParams.WRAP_CONTENT);
        setBackgroundDrawable(new ColorDrawable(context.getResources().getColor(android.R.color.white)));
        setFocusable(true);
        setTouchable(true);
        setOutsideTouchable(true);

        LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        LinearLayout linearLayout = new LinearLayout(context);
        linearLayout.setLayoutParams(lp);
        linearLayout.setOrientation(LinearLayout.VERTICAL);
        linearLayout.setPadding(20, 20, 20, 20);
        setContentView(linearLayout);

        int rows = (int) Math.ceil(items.size() / (double) DEFAULT_COLS);
        radioGroups = new RadioGroup[rows];
        for (int i = 0; i < rows; i++) {
            RadioGroup radioGroup = new RadioGroup(context);
            radioGroup.setTag("group" + i);
            radioGroup.setOrientation(LinearLayout.HORIZONTAL);
            radioGroup.setLayoutParams(lp);
            radioGroup.setOnCheckedChangeListener(radioGroupOnCheckedChangeListener);

            radioGroups[i] = radioGroup;
            linearLayout.addView(radioGroup);

            int j = DEFAULT_COLS;
            if (i == rows - 1 && (items.size() % DEFAULT_COLS != 0)) {
                j = items.size() % DEFAULT_COLS;
            }

            for (int k = 0; k < j; k++) {
                RadioButton radioButton = new RadioButton(context);
                radioButton.setOnCheckedChangeListener(radioButtonOnCheckedChangeListener);
                radioButton.setTag(i * DEFAULT_COLS + k);
                radioButton.setLayoutParams(lp);
                radioButton.setText(items.get(i * DEFAULT_COLS + k).getText());
                radioGroup.addView(radioButton);
            }
        }
    }

    private String lastCheckedGroupTag;

    private RadioGroup.OnCheckedChangeListener radioGroupOnCheckedChangeListener = (group, checkedId) -> {
        if (checkedId == -1) {
            return;
        }

        String tag = group.getTag().toString();
        if (lastCheckedGroupTag == null) {
            lastCheckedGroupTag = tag;
            return;
        }
        // 同组内选择
        if (lastCheckedGroupTag.equals(tag)) {
            return;
        }
        // 上组取消选择
        int index = Integer.parseInt(lastCheckedGroupTag.substring("group".length()));
        radioGroups[index].clearCheck();

        lastCheckedGroupTag = tag;
    };

    private CompoundButton.OnCheckedChangeListener radioButtonOnCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            if (isChecked && onRadioCheckedChanged != null) {
                int index = ((int) buttonView.getTag());
                onRadioCheckedChanged.onRadioChecked(items.get(index).getValue());
            }
        }
    };

    public interface OnRadioCheckedChanged {
        void onRadioChecked(String value);
    }
}