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流布局

package com.bawei.myshopcar.view;import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.View;
import android.widget.LinearLayout;/*** 所有记录的流式布局,这个很熟悉*/
public class CustomFlowLayout extends LinearLayout {private int mChildMaxHeight;private int mHSpace = 20;private int mVSpace = 20;public CustomFlowLayout(Context context, AttributeSet attrs) {super(context, attrs);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);measureChildren(widthMeasureSpec, heightMeasureSpec);findMaxChildMaxHeight();int left = 0, top = 0;int childCount = getChildCount();for (int i = 0; i < childCount; i++) {View view = getChildAt(i);if (left != 0) {if ((left + view.getMeasuredWidth()) > sizeWidth) {top += mChildMaxHeight + mVSpace;left = 0;}}left += view.getMeasuredWidth() + mHSpace;}setMeasuredDimension(sizeWidth, (top + mChildMaxHeight) > sizeHeight ? sizeHeight : top + mChildMaxHeight);}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {super.onLayout(changed, l, t, r, b);findMaxChildMaxHeight();int left = 0, top = 0;int childCount = getChildCount();for (int i = 0; i < childCount; i++) {View view = getChildAt(i);if (left != 0) {if ((left + view.getMeasuredWidth()) > getWidth()) {top += mChildMaxHeight + mVSpace;left = 0;}}view.layout(left, top, left + view.getMeasuredWidth(), top + mChildMaxHeight);left += view.getMeasuredWidth() + mHSpace;}}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);}private void findMaxChildMaxHeight() {mChildMaxHeight = 0;int childCount = getChildCount();for (int i = 0; i < childCount; i++) {View view = getChildAt(i);if (view.getMeasuredHeight() > mChildMaxHeight) {mChildMaxHeight = view.getMeasuredHeight();}}}
}

本文标签： 流布局

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