Android RecyclerView使用方法解析
1.简介
RecyclerView是一种新的视图组，目标是为任何基于适配器的视图提供相似的渲染方式。它被作为ListView和GridView控件的继承者，在最新的support-V7版本中提供支持。RecyclerView架构，提供了一种插拔式的体验，高度的解耦，异常的灵活，通过设置它提供的不同LayoutManager，ItemDecoration,ItemAnimator实现令人瞠目的效果。
总之ListView和GridView能做的RecyclerView都能做，并且能实现瀑布流效果
2.使用
在build.gradle配置RecyclerView的库
compile'com.android.support:recyclerview-v7:23.3.0'
//设置RecyclerView的适配器 adapter=newMyRecyclerViewAdapter(RecyclerViewActivity.this,datas); recyclerview.setAdapter(adapter); //LayoutManager recyclerview.setLayoutManager(newLinearLayoutManager(RecyclerViewActivity.this,LinearLayoutManager.VERTICAL,false)); //recyclerview.scrollToPosition(datas.size()-1); //添加RecyclerView的分割线 recyclerview.addItemDecoration(newDividerListItemDecoration(RecyclerViewActivity.this,DividerListItemDecoration.VERTICAL_LIST)); //设置动画 recyclerview.setItemAnimator(newDefaultItemAnimator());
publicclassMyAdapterextendsRecyclerView.Adapter<MyAdapter.MyViewHolder>{
privatefinalContextcontext;
privatefinalArrayList<String>datas;
publicMyAdapter(Contextcontext,ArrayList<String>datas){
this.context=context;
this.datas=datas;
}
/**
*相当于ListView适配器中的getView的创建holder布局
*
*@paramparent
*@paramviewType
*@return
*/
@Override
publicMyViewHolderonCreateViewHolder(ViewGroupparent,intviewType){
Viewview=View.inflate(context,R.layout.item_hello,null);
returnnewMyViewHolder(view);
}
@Override
publicvoidonBindViewHolder(MyViewHolderholder,intposition){
holder.tv_text.setText(datas.get(position));
holder.iv_icon.setBackgroundResource(R.mipmap.ic_launcher);
}
@Override
publicintgetItemCount(){
returndatas.size();
}
classMyViewHolderextendsRecyclerView.ViewHolder{
privateTextViewtv_text;
privateImageViewiv_icon;
publicMyViewHolder(ViewitemView){
super(itemView);
tv_text=(TextView)itemView.findViewById(R.id.tv_text);
iv_icon=(ImageView)itemView.findViewById(R.id.iv_icon);
}
}
}
3.设置ListView&GridView&瀑布流类型效果
//设置List类型效果 recyclerview.setLayoutManager(newLinearLayoutManager(RecyclerViewActivity.this,LinearLayoutManager.VERTICAL,false)); //设置Grid类型效果 recyclerview.setLayoutManager(newGridLayoutManager(RecyclerViewActivity.this,2,GridLayoutManager.VERTICAL,false)); //recyclerview.scrollToPosition(99); //设置瀑布流类型效果 recyclerview.setLayoutManager(newStaggeredGridLayoutManager(3,StaggeredGridLayoutManager.VERTICAL));
4.分割线
参照网址：http://blog.csdn.net/lmj623565791/article/details/45059587
//设置分割线-分割线需要自定义&还可以自定义分割线的样式 //没有提供默认的分割线 recyclerview.addItemDecoration(newDividerListItemDecoration(this,DividerListItemDecoration.VERTICAL_LIST));
publicclassDividerListItemDecorationextendsRecyclerView.ItemDecoration{
privatestaticfinalint[]ATTRS=newint[]{
android.R.attr.listDivider
};
publicstaticfinalintHORIZONTAL_LIST=LinearLayoutManager.HORIZONTAL;
publicstaticfinalintVERTICAL_LIST=LinearLayoutManager.VERTICAL;
privateDrawablemDivider;
privateintmOrientation;
publicDividerListItemDecoration(Contextcontext,intorientation){
finalTypedArraya=context.obtainStyledAttributes(ATTRS);
mDivider=a.getDrawable(0);
a.recycle();
setOrientation(orientation);
}
publicvoidsetOrientation(intorientation){
if(orientation!=HORIZONTAL_LIST&&orientation!=VERTICAL_LIST){
thrownewIllegalArgumentException("invalidorientation");
}
mOrientation=orientation;
}
@Override
publicvoidonDraw(Canvasc,RecyclerViewparent){
//Log.e("recyclerview-itemdecoration","onDraw()");
if(mOrientation==VERTICAL_LIST){
drawVertical(c,parent);
}else{
drawHorizontal(c,parent);
}
}
publicvoiddrawVertical(Canvasc,RecyclerViewparent){
finalintleft=parent.getPaddingLeft();
finalintright=parent.getWidth()-parent.getPaddingRight();
finalintchildCount=parent.getChildCount();
for(inti=0;i<childCount;i++){
finalViewchild=parent.getChildAt(i);
android.support.v7.widget.RecyclerViewv=newandroid.support.v7.widget.RecyclerView(parent.getContext());
finalRecyclerView.LayoutParamsparams=(RecyclerView.LayoutParams)child
.getLayoutParams();
finalinttop=child.getBottom()+params.bottomMargin;
finalintbottom=top+mDivider.getIntrinsicHeight();
mDivider.setBounds(left,top,right,bottom);
mDivider.draw(c);
}
}
publicvoiddrawHorizontal(Canvasc,RecyclerViewparent){
finalinttop=parent.getPaddingTop();
finalintbottom=parent.getHeight()-parent.getPaddingBottom();
finalintchildCount=parent.getChildCount();
for(inti=0;i<childCount;i++){
finalViewchild=parent.getChildAt(i);
finalRecyclerView.LayoutParamsparams=(RecyclerView.LayoutParams)child
.getLayoutParams();
finalintleft=child.getRight()+params.rightMargin;
finalintright=left+mDivider.getIntrinsicHeight();
mDivider.setBounds(left,top,right,bottom);
mDivider.draw(c);
}
}
@Override
publicvoidgetItemOffsets(RectoutRect,intitemPosition,RecyclerViewparent){
if(mOrientation==VERTICAL_LIST){
outRect.set(0,0,0,mDivider.getIntrinsicHeight());
}else{
outRect.set(0,0,mDivider.getIntrinsicWidth(),0);
}
}
}
DividerListItemDecoration
设置分割线样式：
①application设置
<!--Baseapplicationtheme.--> <stylename="AppTheme"parent="Theme.AppCompat.Light.DarkActionBar"> <!--Customizeyourthemehere.--> <itemname="colorPrimary">@color/colorPrimary</item> <itemname="colorPrimaryDark">@color/colorPrimaryDark</item> <itemname="colorAccent">@color/colorAccent</item> <itemname="android:listDivider">@drawable/divider_bg</item> </style>
②在activity中
<activityandroid:name=".recyclerview.RecyclerViewActivity" android:theme="@style/listDividerTheme"/> <stylename="listDividerTheme"parent="Theme.AppCompat.Light.DarkActionBar"> <!--Customizeyourthemehere.--> <itemname="colorPrimary">@color/colorPrimary</item> <itemname="colorPrimaryDark">@color/colorPrimaryDark</item> <itemname="colorAccent">@color/colorAccent</item> <itemname="android:listDivider">@drawable/divider_bg</item> </style>
5.自定义设置item的点击事件
RecyclerView默认是没有点击事件的，需要自定义点击事件
用到知识点：接口，getLayoutPosition()
publicclassMyAdapterextendsRecyclerView.Adapter<MyAdapter.MyViewHolder>{
privatefinalContextcontext;
privatefinalArrayList<String>datas;
//设置点击某个item的监听
publicinterfaceOnItemClickListener{
voidonItemClick(Viewview,intposition,Stringcontent);
}
privateOnItemClickListeneronItemClickListener;
publicvoidsetOnItemClickListener(OnItemClickListeneronItemClickListener){
this.onItemClickListener=onItemClickListener;
}
//设置点击图片
publicinterfaceOnImageViewClickListener{
voidonImageViewClick(Viewview,intposition);
}
privateOnImageViewClickListeneronImageViewClickListener;
publicvoidsetOnImageViewClickListener(OnImageViewClickListeneronImageViewClickListener){
this.onImageViewClickListener=onImageViewClickListener;
}
...................................
classMyViewHolderextendsRecyclerView.ViewHolder{
privateTextViewtv_text;
privateImageViewiv_icon;
publicMyViewHolder(ViewitemView){
super(itemView);
tv_text=(TextView)itemView.findViewById(R.id.tv_text);
iv_icon=(ImageView)itemView.findViewById(R.id.iv_icon);
//设置点击事件
itemView.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
if(onItemClickListener!=null){
onItemClickListener.onItemClick(v,getLayoutPosition(),datas.get(getLayoutPosition()));
}
}
});
//设置监听
iv_icon.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
if(onImageViewClickListener!=null){
onImageViewClickListener.onImageViewClick(v,getLayoutPosition());
}
}
});
}
}
}
在Activity中使用自定义的点击事件
//设置点击item的点击事件
myAdapter.setOnItemClickListener(newMyAdapter.OnItemClickListener(){
@Override
publicvoidonItemClick(Viewview,intposition,Stringcontent){
Toast.makeText(RecyclerViewActivity.this,"content=="+content+",--position=="+position,Toast.LENGTH_SHORT).show();
}
});
//设置点击某张图片的点击事件
myAdapter.setOnImageViewClickListener(newMyAdapter.OnImageViewClickListener(){
@Override
publicvoidonImageViewClick(Viewview,intposition){
Toast.makeText(RecyclerViewActivity.this,"position=="+position+",view=="+view.toString(),Toast.LENGTH_SHORT).show();
}
});
6.删除和增加数据
1_在适配器中新增加添加和删除两个方法
publicclassMyAdapterextendsRecyclerView.Adapter<MyAdapter.MyViewHolder>{
........................
publicvoidaddData(intposition,Stringcontent){
datas.add(position,content);
notifyItemInserted(position);
}
publicvoidremoveData(intposition){
datas.remove(position);
notifyItemRemoved(position);
}
}
2_Activity中
btn_add.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
myAdapter.addData(0,"ContentNetData");
//定位到第0个位置
recyclerview.scrollToPosition(0);
}
});
btn_remove.setOnClickListener(newView.OnClickListener(){
@Override
publicvoidonClick(Viewv){
myAdapter.removeData(0);
}
});
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。