import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.widget.RadioGroup;/*** 流式布局的RadioGroup*/
public class FlowRadioGroup extends RadioGroup {public FlowRadioGroup(Context context) {super(context);}public FlowRadioGroup(Context context, AttributeSet attrs) {super(context, attrs);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int maxWidth = MeasureSpec.getSize(widthMeasureSpec);int childCount = getChildCount();int x = 0;int y = 0;int row = 0;for (int index = 0; index < childCount; index++) {final View child = getChildAt(index);if (child.getVisibility() != View.GONE) {child.measure(MeasureSpec.UNSPECIFIED, MeasureSpec.UNSPECIFIED);// 此处增加onlayout中的换行判断，用于计算所需的高度int width = child.getMeasuredWidth();int height = child.getMeasuredHeight();x += width;y = row * height + height;if (x > maxWidth) {x = width;row++;y = row * height + height;}}}// 设置容器所需的宽度和高度
        setMeasuredDimension(maxWidth, y);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {final int childCount = getChildCount();int maxWidth = r - l;int x = 0;int y = 0;int row = 0;for (int i = 0; i < childCount; i++) {final View child = this.getChildAt(i);if (child.getVisibility() != View.GONE) {int width = child.getMeasuredWidth();int height = child.getMeasuredHeight();x += width;y = row * height + height;if (x > maxWidth) {x = width;row++;y = row * height + height;}child.layout(x - width, y - height, x, y);}}}
}