Android流布局FlowLayout在搜索历史中的应用0920Word文档下载推荐.docx
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db.execSQL（
"
createtablekw（_idintegerprimarykeyautoincrement,keywordvarchar,inputnointeger）"
）;
//插入初始数据
db.execSQL（"
insertintokw（keyword,inputno）values（'
book'
'
0'
）"
书本'
publicvoidonUpgrade（SQLiteDatabasedb,intoldVersion,intnewVersion）{
//升级
}
Kw.java
*Createdby钧on2016/9/18.
*关键词实体类
publicclassKw{
publicintid;
publicStringkeyword;
publicintinputno;
publicintgetId（）{
returnid;
publicvoidsetId（intid）{
this.id=id;
publicStringgetKeyword（）{
returnkeyword;
publicvoidsetKeyword（Stringkeyword）{
this.keyword=keyword;
publicintgetInputno（）{
returninputno;
publicvoidsetInputno（intinputno）{
this.inputno=inputno;
publicStringtoString（）{
return"
Kw{"
+
id="
+id+
keyword='
"
+keyword+'
\'
'
inputno="
+inputno+
'
}'
;
KwDao.java
*封装对关键词表的数据库访问操作
publicclassKwDao{
publicKwDao（）{}
publicKwDao（Contextcontext）{
this.context=context;
privateContextcontext;
privateStringtablename="
kw"
*判断数据库中是否存在key
*@paramkey
*@return
publicbooleancontains（Stringkey）{
List<
Kw>
list=newArrayList<
（）;
//实例化辅助类
DBHelperhelper=newDBHelper（context）;
//获取SQLite数据库对象
SQLiteDatabasedb=helper.getReadableDatabase（）;
//执行查询命令,接收游标返回
Cursorcursor=db.rawQuery（"
selectcount（*）from"
+this.tablename
+"
wherekeyword='
+key+"
null）;
intnumber=0;
while（cursor.moveToNext（））{//moveToNext:
移动到下一行
number=cursor.getInt（0）;
//count（*）
cursor.close（）;
//游标关闭
db.close（）;
//db关闭
if（number==0）{
returnfalse;
}else{
returntrue;
*插入一个全新的关键词
publiclonginsert（Stringkey）{
//准备插入的数据
ContentValuesvalues=newContentValues（）;
//
values.put（"
keyword"
key）;
inputno"
1）;
longid=db.insert（tablename,null,values）;
Log.i（"
spl"
"
insertid="
+id）;
//关闭连接
*增加某个关键词的使用频度
publicvoidupdate（Stringkey）{
updatekwsetinputno=inputno+1wherekeyword='
*根据"
用户的输入"
返回和这个词相关的关键词集合
publicList<
select（Stringkey）{
select*from"
wherekeywordlike'
%"
%'
orderbyinputnodescLIMIT10"
Kwkw=newKw（）;
kw.setId（cursor.getInt（0））;
kw.setKeyword（cursor.getString
（1））;
kw.setInputno（cursor.getInt
（2））;
list.add（kw）;
//添加到集合
returnlist;
MyAdapter.java
流布局,核心类
*Createdbytaofangxinon16/4/16.
*自定义布局:
组件自动换行
publicclassFlowLayoutextendsViewGroup{
privateContextmContext;
privateintusefulWidth;
//thespaceofalinewecanuse（line'
swidthminusthesumofleftandrightpadding
//行间距
privateintlineSpacing=0;
//thespacingbetweenlinesinflowlayout
View>
childList=newArrayList（）;
Integer>
lineNumList=newArrayList（）;
publicFlowLayout（Contextcontext）{
this（context,null）;
publicFlowLayout（Contextcontext,AttributeSetattrs）{
this（context,attrs,0）;
publicFlowLayout（Contextcontext,AttributeSetattrs,intdefStyleAttr）{
super（context,attrs,defStyleAttr）;
mContext=context;
TypedArraymTypedArray=context.obtainStyledAttributes（attrs,
R.styleable.FlowLayout）;
//给行间距赋值
//lineSpacing=mTypedArray.getDimensionPixelSize（
//R.styleable.FlowLayout_lineSpacing,0）;
lineSpacing=30;
//px这里被我修改成固定的值了
mTypedArray.recycle（）;
protectedvoidonMeasure（intwidthMeasureSpec,intheightMeasureSpec）{
intmPaddingLeft=getPaddingLeft（）;
intmPaddingRight=getPaddingRight（）;
intmPaddingTop=getPaddingTop（）;
intmPaddingBottom=getPaddingBottom（）;
intwidthSize=MeasureSpec.getSize（widthMeasureSpec）;
intheightMode=MeasureSpec.getMode（heightMeasureSpec）;
intheightSize=MeasureSpec.getSize（heightMeasureSpec）;
intlineUsed=mPaddingLeft+mPaddingRight;
intlineY=mPaddingTop;
intlineHeight=0;
for（inti=0;
i<
this.getChildCount（）;
i++）{
Viewchild=this.getChildAt（i）;
if（child.getVisibility（）==GONE）{
continue;
intspaceWidth=0;
intspaceHeight=0;
LayoutParamschildLp=child.getLayoutParams（）;
if（childLpinstanceofMarginLayoutParams）{
measureChildWithMargins（child,widthMeasureSpec,0,heightMeasureSpec,lineY）;
MarginLayoutParamsmlp=（MarginLayoutParams）childLp;
spaceWidth=mlp.leftMargin+mlp.rightMargin;
spaceHeight=mlp.topMargin+mlp.bottomMargin;
}else{
measureChild（child,widthMeasureSpec,heightMeasureSpec）;
intchildWidth=child.getMeasuredWidth（）;
intchildHeight=child.getMeasuredHeight（）;
spaceWidth+=childWidth;
spaceHeight+=childHeight;
if（lineUsed+spaceWidth>
widthSize）{
//approachthelimitofwidthandmovetonextline
lineY+=lineHeight+lineSpacing;
lineUsed=mPaddingLeft+mPaddingRight;
lineHeight=0;
if（spaceHeight>
lineHeight）{
lineHeight=spaceHeight;
lineUsed+=spaceWidth;
setMeasuredDimension（
widthSize,
heightMode==MeasureSpec.EXACTLY?
heightSize:
lineY+lineHeight+mPaddingBottom
）;
protectedvoidonLayout（booleanchanged,intl,intt,intr,intb）{
intlineX=mPaddingLeft;
intlineWidth=r-l;
usefulWidth=lineWidth-mPaddingLeft-mPaddingRight;
intlineNum=0;
lineNumList.clear（）;
intleft=0;
inttop=0;
intright=0;
intbottom=0;
left=lineX+mlp.leftMargin;
top=lineY+mlp.topMargin;
right=lineX+mlp.leftMargin+childWidth;
bottom=lineY+mlp.topMargin+childHeight;
left=lineX;
top=lineY;
right=lineX+childWidth;
bottom=lineY+childHeight;
lineWidth）{
lineNumList.add（lineNum）;
lineX=mPaddingLeft;
lineNum=0;
child.layout（left,top,right,bottom）;
lineNum++;
lineX+=spaceWidth;
//addthenumoflastline
*resortchildelementstouselinesasfewaspossible
publicvoidrelayoutToCompress（）{
intchildCount=this.getChildCount（）;
if（0==childCount）{
//noneedtosortifflowlayouthasnochildview
return;
intcount=0;
childCount;
Viewv=getChildAt（i）;
if（vinstanceofBlankView）{
//BlankViewisjusttomakechildslookinalignment,weshouldignorethemwhenwerelayout
count++;
View[]childs=newView[count];
int[]spaces=newint[count];
intn=0;
childs[n]=v;
LayoutParamschildLp=v.getLayoutParams（）;
intchildWidth=v.getMeasuredWidth（）;
MarginLayoutParamsmlp=（MarginLayoutParams）childLp;
spaces[n]=mlp.leftMargin+childWidth+mlp.rightMargin;
spaces[n]=childWidth;
n++;
int[]compressSpaces=newint[count];
count;
compressSpaces[i]=spaces[i]>
usefulWidth?
usefulWidth:
spaces[i];
sortToCompress（childs,compressSpaces）;
this.rem
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