RecyclerVIew实现悬浮吸顶效果

2023-09-25 07:12:05 70

RecyclerVIew实现悬浮吸顶效果图

这里写图片描述

主页面布局

RecyclerView的子条目布局

activity代码

publicclassMainActivityextendsAppCompatActivity{

privateTextViewtvStickyHeaderView;
privateRecyclerViewrecyclerView;

@Override
protectedvoidonCreate(BundlesavedInstanceState){
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
initListener();
}

/**
*初始化View
*/
privatevoidinitView(){
recyclerView=(RecyclerView)findViewById(R.id.recycle);
tvStickyHeaderView=(TextView)findViewById(R.id.tv_sticky_header_view);
recyclerView.setLayoutManager(newLinearLayoutManager(this));
recyclerView.setAdapter(newStickyExampleAdapter(this,getData()));
}

/**
*初始化Listener
*/
privatevoidinitListener(){
recyclerView.addOnScrollListener(newRecyclerView.OnScrollListener(){
@Override
publicvoidonScrolled(RecyclerViewrecyclerView,intdx,intdy){
super.onScrolled(recyclerView,dx,dy);
Viewstickview=recyclerView.findChildViewUnder(0,0);
if(stickview!=null&&stickview.getContentDescription()!=null){
if(!TextUtils.equals(tvStickyHeaderView.getText(),stickview.getContentDescription())){
tvStickyHeaderView.setText(stickview.getContentDescription());
}
}
ViewtransInfoView=recyclerView.findChildViewUnder(
0,tvStickyHeaderView.getHeight()+1);
if(transInfoView.getTag()!=null){

inttransViewStatus=(int)transInfoView.getTag();
inttop=transInfoView.getTop();

if(transViewStatus==StickyExampleAdapter.HAS_STICKY_VIEW){
if(top>0){
intdealtY=top-tvStickyHeaderView.getMeasuredHeight();
tvStickyHeaderView.setTranslationY(dealtY);
}else{
tvStickyHeaderView.setTranslationY(0);
}
}elseif(transViewStatus==StickyExampleAdapter.NONE_STICKY_VIEW){
tvStickyHeaderView.setTranslationY(0);
}
}
}
});
}

publicListgetData(){
ListstickyExampleModels=newArrayList<>();

for(intindex=0;index<100;index++){
if(index<15){
stickyExampleModels.add(newStickyBean(
"吸顶文本1","name"+index,"gender"+index));
}elseif(index<25){
stickyExampleModels.add(newStickyBean(
"吸顶文本2","name"+index,"gender"+index));
}elseif(index<35){
stickyExampleModels.add(newStickyBean(
"吸顶文本3","name"+index,"gender"+index));
}else{
stickyExampleModels.add(newStickyBean(
"吸顶文本4","name"+index,"gender"+index));
}
}
returnstickyExampleModels;
}
}

adapter代码

publicclassStickyExampleAdapterextendsRecyclerView.Adapter{
//第一个吸顶
privatestaticfinalintFIRST_STICKY_VIEW=1;
//别的吸顶
staticfinalintHAS_STICKY_VIEW=2;
//正常View
staticfinalintNONE_STICKY_VIEW=3;
privatefinalLayoutInflatermInflate;
privatefinalListdatas;

StickyExampleAdapter(Contextcontext,Listdatas){
mInflate=LayoutInflater.from(context);
this.datas=datas;
}

@Override
publicRecyclerViewHolderonCreateViewHolder(ViewGroupparent,intviewType){

Viewinflate=mInflate.inflate(R.layout.item_ui,parent,false);
returnnewRecyclerViewHolder(inflate);
}

@Override
publicvoidonBindViewHolder(RecyclerViewHolderholder,intposition){
StickyBeanstickyBean=datas.get(position);
holder.tvName.setText(stickyBean.name);
holder.tvGender.setText(stickyBean.autor);

if(position==0){
holder.tvStickyHeader.setVisibility(View.VISIBLE);
holder.tvStickyHeader.setText(stickyBean.sticky);
holder.itemView.setTag(FIRST_STICKY_VIEW);
}else{
if(!TextUtils.equals(stickyBean.sticky,datas.get(position-1).sticky)){
holder.tvStickyHeader.setVisibility(View.VISIBLE);
holder.tvStickyHeader.setText(stickyBean.sticky);
holder.itemView.setTag(HAS_STICKY_VIEW);
}else{
holder.tvStickyHeader.setVisibility(View.GONE);
holder.itemView.setTag(NONE_STICKY_VIEW);
}
}
//通过此处设置ContentDescription，作为内容描述，可以通过getContentDescription取出，功效跟setTag差不多。
holder.itemView.setContentDescription(stickyBean.sticky);
}

@Override
publicintgetItemCount(){
returndatas==null?0:datas.size();
}

publicclassRecyclerViewHolderextendsRecyclerView.ViewHolder{
TextViewtvStickyHeader;
RelativeLayoutrlContentWrapper;
TextViewtvName;
TextViewtvGender;
RecyclerViewHolder(ViewitemView){
super(itemView);
tvStickyHeader=(TextView)itemView.findViewById(R.id.tv_sticky_header_view);
rlContentWrapper=(RelativeLayout)itemView.findViewById(R.id.rl_content_wrapper);
tvName=(TextView)itemView.findViewById(R.id.name);
tvGender=(TextView)itemView.findViewById(R.id.auto);
}
}
}

StickyBean代码

publicclassStickyBean{

publicStringname;
publicStringautor;
publicStringsticky;

publicStickyBean(Stringsticky,Stringname,Stringautor){
this.sticky=sticky;
this.name=name;
this.autor=autor;
}
}

app的build文件

applyplugin:'com.android.application'

android{
compileSdkVersion26
buildToolsVersion"25.0.3"
defaultConfig{
applicationId"com.lg.floating"
minSdkVersion15
targetSdkVersion26
versionCode1
versionName"1.0"
testInstrumentationRunner"android.support.test.runner.AndroidJUnitRunner"
}
buildTypes{
release{
minifyEnabledfalse
proguardFilesgetDefaultProguardFile('proguard-android.txt'),'proguard-rules.pro'
}
}
}

dependencies{
compilefileTree(dir:'libs',include:['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2',{
excludegroup:'com.android.support',module:'support-annotations'
})
compile'com.android.support:appcompat-v7:26.0.0-alpha1'
compile'com.android.support:recyclerview-v7:23.1.0'
testCompile'junit:junit:4.12'
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

RecyclerVIew实现悬浮吸顶效果

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