android 流添加 热门搜索，切换历史与热门

流添加 热门搜索

package com.coubei.android.view;

import java.util.ArrayList;

import java.util.List;

import android.content.Context;

import android.util.AttributeSet;

import android.view.View;

import android.view.ViewGroup;

/**

*

*/

public class XCFlowLayout extends ViewGroup{

public XCFlowLayout(Context context) {

this(context, null);

// TODO Auto-generated constructor stub

}

public XCFlowLayout(Context context, AttributeSet attrs) {

this(context, attrs, 0);

// TODO Auto-generated constructor stub

}

public XCFlowLayout(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

// TODO Auto-generated constructor stub

}

@Override

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

// TODO Auto-generated method stub

//父控件传进来的宽度和高度以及对应的测量模式

int sizeWidth = MeasureSpec.getSize(widthMeasureSpec);

int modeWidth = MeasureSpec.getMode(widthMeasureSpec);

int sizeHeight = MeasureSpec.getSize(heightMeasureSpec);

int modeHeight = MeasureSpec.getMode(heightMeasureSpec);

//如果当前ViewGroup的宽高为wrap_content的情况

int width = 0;//自己测量的 宽度

int height = 0;//自己测量的高度

//记录每一行的宽度和高度

int lineWidth = 0;

int lineHeight = 0;

//获取子view的个数

int childCount = getChildCount();

for(int i = 0;i < childCount; i ++){

View child = getChildAt(i);

//测量子View的宽和高

measureChild(child, widthMeasureSpec, heightMeasureSpec);

//得到LayoutParams

MarginLayoutParams lp = (MarginLayoutParams) getLayoutParams();

//子View占据的宽度

int childWidth = child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;

//子View占据的高度

int childHeight = child.getMeasuredHeight() + lp.topMargin + lp.bottomMargin;

//换行时候

if(lineWidth + childWidth > sizeWidth){

//对比得到最大的宽度

width = Math.max(width, lineWidth);

//重置lineWidth

lineWidth = childWidth;

//记录行高

height += lineHeight;

lineHeight = childHeight;

}else{//不换行情况

//叠加行宽

lineWidth += childWidth;

//得到最大行高

lineHeight = Math.max(lineHeight, childHeight);

}

//处理最后一个子View的情况

if(i == childCount -1){

width = Math.max(width, lineWidth);

height += lineHeight;

}

}

//wrap_content

setMeasuredDimension(modeWidth == MeasureSpec.EXACTLY ? sizeWidth : width,

modeHeight == MeasureSpec.EXACTLY ? sizeHeight : height);

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

}

//存储所有子View

private List<List<View>> mAllChildViews = new ArrayList<List<View>>();

//每一行的高度

private List<Integer> mLineHeight = new ArrayList<Integer>();

@Override

protected void onLayout(boolean changed, int l, int t, int r, int b) {

// TODO Auto-generated method stub

mAllChildViews.clear();

mLineHeight.clear();

//获取当前ViewGroup的宽度

int width = getWidth();

int lineWidth = 0;

int lineHeight = 0;

//记录当前行的view

List<View> lineViews = new ArrayList<View>();

int childCount = getChildCount();

for(int i = 0;i < childCount; i ++){

View child = getChildAt(i);

MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();

int childWidth = child.getMeasuredWidth();

int childHeight = child.getMeasuredHeight();

//如果需要换行

if(childWidth + lineWidth + lp.leftMargin + lp.rightMargin > width){

//记录LineHeight

mLineHeight.add(lineHeight);

//记录当前行的Views

mAllChildViews.add(lineViews);

//重置行的宽高

lineWidth = 0;

lineHeight = childHeight + lp.topMargin + lp.bottomMargin;

//重置view的集合

lineViews = new ArrayList();

}

lineWidth += childWidth + lp.leftMargin + lp.rightMargin;

lineHeight = Math.max(lineHeight, childHeight + lp.topMargin + lp.bottomMargin);

lineViews.add(child);

}

//处理最后一行

mLineHeight.add(lineHeight);

mAllChildViews.add(lineViews);

//设置子View的位置

int left = 0;

int top = 0;

//获取行数

int lineCount = mAllChildViews.size();

for(int i = 0; i < lineCount; i ++){

//当前行的views和高度

lineViews = mAllChildViews.get(i);

lineHeight = mLineHeight.get(i);

for(int j = 0; j < lineViews.size(); j ++){

View child = lineViews.get(j);

//判断是否显示

if(child.getVisibility() == View.GONE){

continue;

}

MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();

int cLeft = left + lp.leftMargin;

int cTop = top + lp.topMargin;

int cRight = cLeft + child.getMeasuredWidth();

int cBottom = cTop + child.getMeasuredHeight();

//进行子View进行布局

child.layout(cLeft, cTop, cRight, cBottom);

left += child.getMeasuredWidth() + lp.leftMargin + lp.rightMargin;

}

left = 0;

top += lineHeight;

}

}

/**

* 与当前ViewGroup对应的LayoutParams

*/

@Override

public LayoutParams generateLayoutParams(AttributeSet attrs) {

// TODO Auto-generated method stub

return new MarginLayoutParams(getContext(), attrs);

}

}

2.在需要的XML 中 应用

3.在java 类里面 设置 间隔的宽高

4.在 自定义的控件中添加 项 和点击事件

search_no_history.addView(mView, lp);