自定义RadioGroup，实现单选功能

最新推荐文章于 2025-09-09 13:20:12 发布

原创

最新推荐文章于 2025-09-09 13:20:12 发布 · 1.7k 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#RadioGroup #RadioButton换行

本文介绍了一种自定义RadioGroup的方法，解决了在RadioGroup中两个RadioButton同时选中及RadioButton换行布局的问题。通过扩展RadioGroup，实现了可换行且保持单选状态的功能，并提供了具体使用示例。

文章目录

扩展RadioGroup，实现RadioButton换行可单选功能；

1、效果图：

在这里插入图片描述

2、自定义MyRadioGroup

/**
 * @Dec ：解决RadioGroup中两个RadioButton选中以及RadioButton换行布局的RadioGroup
 * <p>
 * https://blog.youkuaiyun.com/yuanzihui/article/details/50462496
 * @Author : Caowj
 * @Date : 2018/11/20 16:48
 */
public class MyRadioGroup extends LinearLayout {
    // holds the checked id; the selection is empty by default
    private int mCheckedId = -1;
    // tracks children radio buttons checked state
    private CompoundButton.OnCheckedChangeListener mChildOnCheckedChangeListener;
    // when true, mOnCheckedChangeListener discards events
    private boolean mProtectFromCheckedChange = false;
    private OnCheckedChangeListener mOnCheckedChangeListener;
    private PassThroughHierarchyChangeListener mPassThroughListener;

    public MyRadioGroup(Context context) {
        super(context);
        setOrientation(VERTICAL);
        init();
    }

    public MyRadioGroup(Context context, AttributeSet attrs) {
        super(context, attrs);
        mCheckedId = View.NO_ID;

        final int index = VERTICAL;
        setOrientation(index);

        init();
    }

    private void init() {
        mChildOnCheckedChangeListener = new CheckedStateTracker();
        mPassThroughListener = new PassThroughHierarchyChangeListener();
        super.setOnHierarchyChangeListener(mPassThroughListener);
    }

    @Override
    public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
        // the user listener is delegated to our pass-through listener
        mPassThroughListener.mOnHierarchyChangeListener = listener;
    }
    
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();

        // checks the appropriate radio button as requested in the XML file
        if (mCheckedId != -1) {
            mProtectFromCheckedChange = true;
            setCheckedStateForView(mCheckedId, true);
            mProtectFromCheckedChange = false;
            setCheckedId(mCheckedId);
        }
    }

    @Override
    public void addView(final View child, int index, ViewGroup.LayoutParams params) {
        if (child instanceof RadioButton) {

            ((RadioButton) child).setOnTouchListener(new OnTouchListener() {

                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    ((RadioButton) child).setChecked(true);
                    checkRadioButton((RadioButton) child);
                    if (mOnCheckedChangeListener != null) {
                        mOnCheckedChangeListener.onCheckedChanged(MyRadioGroup.this, chi