自定义viewgroup 包含多个子view 自动换行

package com.nf.health.app.customview;import android.content.Context;import android.util.AttributeSet;import android.view.View;import android.view.ViewGroup;/*** 原创作者：* yyh*/public class MyFlowLayout extends ViewGroup{private int  verticalSpacing = 10;public MyFlowLayout(Context context, AttributeSet attrs) {super(context, attrs);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec);int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec);int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec);int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec);int paddingLeft = getPaddingLeft();int paddingRight = getPaddingRight();int paddingTop = getPaddingTop();int paddingBottom = getPaddingBottom();int widthUsed = paddingLeft + paddingRight;int heightUsed = paddingTop + paddingBottom;int childMaxHeightOfThisLine = 0;int childCount = getChildCount();for (int i = 0; i < childCount; i++) {View child = getChildAt(i);if (child.getVisibility() != GONE) {int childUsedWidth = 0;int childUsedHeight = 0;measureChild(child,widthMeasureSpec,heightMeasureSpec);childUsedWidth += child.getMeasuredWidth();childUsedHeight += child.getMeasuredHeight();LayoutParams childLayoutParams = child.getLayoutParams();MarginLayoutParams marginLayoutParams = (MarginLayoutParams) childLayoutParams;childUsedWidth += marginLayoutParams.leftMargin + marginLayoutParams.rightMargin;childUsedHeight += marginLayoutParams.topMargin + marginLayoutParams.bottomMargin;if (widthUsed + childUsedWidth < widthSpecSize) {//不需要换行widthUsed += childUsedWidth;//是否更新该行的高if (childUsedHeight > childMaxHeightOfThisLine) {childMaxHeightOfThisLine = childUsedHeight;}} else {//处理换行//增加View控件的高heightUsed += childMaxHeightOfThisLine + verticalSpacing;//重新计算已使用的宽widthUsed = paddingLeft + paddingRight + childUsedWidth;//换行后第一个控件的高即为行高childMaxHeightOfThisLine = childUsedHeight;}}}//View的行高=最后一行之前的高度+最后一行最高的控件的高度(行高)heightUsed += childMaxHeightOfThisLine;setMeasuredDimension(widthSpecSize, heightUsed);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {int paddingLeft = getPaddingLeft();int paddingRight = getPaddingRight();int paddingTop = getPaddingTop();int paddingBottom = getPaddingBottom();int childStartLayoutX = paddingLeft;int childStartLayoutY = paddingTop;int widthUsed = paddingLeft + paddingRight;int childMaxHeight = 0;int childCount = getChildCount();for (int i = 0; i < childCount; i++) {View child = getChildAt(i);if (child.getVisibility() != GONE) {int childNeededWidth, childNeedHeight;int left, top, right, bottom;int childMeasuredWidth = child.getMeasuredWidth();int childMeasuredHeight = child.getMeasuredHeight();LayoutParams childLayoutParams = child.getLayoutParams();MarginLayoutParams marginLayoutParams = (MarginLayoutParams) childLayoutParams;int childLeftMargin = marginLayoutParams.leftMargin;int childTopMargin = marginLayoutParams.topMargin;int childRightMargin = marginLayoutParams.rightMargin;int childBottomMargin = marginLayoutParams.bottomMargin;childNeededWidth = childLeftMargin + childRightMargin + childMeasuredWidth;childNeedHeight = childTopMargin + childBottomMargin + childMeasuredHeight;if (widthUsed + childNeededWidth <= r - l) {if (childNeedHeight > childMaxHeight) {childMaxHeight = childNeedHeight;}left = childStartLayoutX + childLeftMargin;top = childStartLayoutY + childTopMargin;right = left + childMeasuredWidth;bottom = top + childMeasuredHeight;widthUsed += childNeededWidth;childStartLayoutX += childNeededWidth;} else {childStartLayoutY += childMaxHeight + verticalSpacing;childStartLayoutX = paddingLeft;widthUsed = paddingLeft + paddingRight;left = childStartLayoutX + childLeftMargin;top = childStartLayoutY + childTopMargin;right = left + childMeasuredWidth;bottom = top + childMeasuredHeight;widthUsed += childNeededWidth;childStartLayoutX += childNeededWidth;childMaxHeight = childNeedHeight;}child.layout(left, top, right, bottom);}}}}

	  TextView tv = (TextView) View.inflate(this, R.layout.item_selected_disease, null);ViewGroup.MarginLayoutParams marginLayoutParams = new ViewGroup.MarginLayoutParams(+ViewGroup.LayoutParams.WRAP_CONTENT, +ViewGroup.LayoutParams.WRAP_CONTENT);tv.setText(values[i]);marginLayoutParams.setMargins(10, 10, 10, 10);tv.setGravity(Gravity.CENTER);flSelectedDisease.addView(tv, marginLayoutParams);//直接调用add方法,传入子view 和子view布局参数