自定义支持多行显示的RadioGroup

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自定义支持多行显示的RadioGroup

原生的RadioGroup继承自LinearLayout，即只能支持一横排或者一竖排的排列显示RadioButton

现在改写RadioGroup，使它支持多行多列排布RadioButton，效果图如下

效果图

这里写图片描述

重写RadioGroup

package com.kongqw.radiogroupdemo;import android.content.Context;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;import android.view.ViewGroup;import android.widget.LinearLayout;import android.widget.RadioButton;import android.widget.RadioGroup;/** * Created by kongqw on 2016/2/18. */public class MyRadioGroup extends RadioGroup {    private OnCheckedChangeListener mOnCheckedChangeListener;    public MyRadioGroup(Context context) {        super(context);    }    public MyRadioGroup(Context context, AttributeSet attrs) {        super(context, attrs);    }    public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {        mOnCheckedChangeListener = listener;    }    @Override    public void addView(final View child, int index, ViewGroup.LayoutParams params) {        if (child instanceof LinearLayout) {            int childCount = ((LinearLayout) child).getChildCount();            for (int i = 0; i < childCount; i++) {                View view = ((LinearLayout) child).getChildAt(i);                if (view instanceof RadioButton) {                    final RadioButton button = (RadioButton) view;                    ((RadioButton) button).setOnTouchListener(new OnTouchListener() {                        @Override                        public boolean onTouch(View v, MotionEvent event) {                            ((RadioButton) button).setChecked(true);                            checkRadioButton((RadioButton) button);                            if (mOnCheckedChangeListener != null) {                                mOnCheckedChangeListener.onCheckedChanged(MyRadioGroup.this, button.getId());                            }                            return true;                        }                    });                }            }        }        super.addView(child, index, params);    }    private void checkRadioButton(RadioButton radioButton) {        View child;        int radioCount = getChildCount();        for (int i = 0; i < radioCount; i++) {            child = getChildAt(i);            if (child instanceof RadioButton) {                if (child == radioButton) {                    // do nothing                } else {                    ((RadioButton) child).setChecked(false);                }            } else if (child instanceof LinearLayout) {                int childCount = ((LinearLayout) child).getChildCount();                for (int j = 0; j < childCount; j++) {                    View view = ((LinearLayout) child).getChildAt(j);                    if (view instanceof RadioButton) {                        final RadioButton button = (RadioButton) view;                        if (button == radioButton) {                            // do nothing                        } else {                            ((RadioButton) button).setChecked(false);                        }                    }                }            }        }    }}

布局

RadioGroup里面还可以包裹一层LinearLayout

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.kongqw.radiogroupdemo.MainActivity">    <com.kongqw.radiogroupdemo.MyRadioGroup        android:layout_width="match_parent"        android:layout_height="match_parent">        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content">            <RadioButton                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="C" />            <RadioButton                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="C++" />        </LinearLayout>        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content">            <RadioButton                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="Java" />            <RadioButton                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:text="OC" />        </LinearLayout>    </com.kongqw.radiogroupdemo.MyRadioGroup></RelativeLayout>

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