android– 水平滚动的水平回收视图[复制]

概述参见英文答案>HowtobuildaHorizontalListViewwithRecyclerView?                                    13个我学习机器人,我似乎无法找到一种方法来做到这一点：我想做左侧滚动的权利,我猜是一个recylcer视图,但不确定它是否这样.我只

参见英文答案 > How to build a Horizontal ListView with RecyclerView?                                    13个
我学习机器人,我似乎无法找到一种方法来做到这一点：

我想做左侧滚动的权利,我猜是一个recylcer视图,但不确定它是否这样.我只需要有人指出我正确的方向.
我想我需要一个RecyclervIEw的内部布局.

如果有人能指出我在哪里搞清楚这一点,我会非常感激！

解决方法:

第1步

创建两个模型类,如下所示.

package-name-here;public class SingleItemmodel {    private String name;    private String url;    private String description;    public SingleItemmodel() {    }    public SingleItemmodel(String name, String url) {        this.name = name;        this.url = url;    }    public String getUrl() {        return url;    }    public voID setUrl(String url) {        this.url = url;    }    public String getname() {        return name;    }    public voID setname(String name) {        this.name = name;    }    public String getDescription() {        return description;    }    public voID setDescription(String description) {        this.description = description;    }}

>创建其他模型类SectionDataModel.java

package-name-here;;import java.util.ArrayList;public class SectionDataModel {private String headerTitle;private ArrayList<SingleItemmodel> allitemsInSection;public SectionDataModel() {}public SectionDataModel(String headerTitle, ArrayList<SingleItemmodel> allitemsInSection) {    this.headerTitle = headerTitle;    this.allitemsInSection = allitemsInSection;}public String getheaderTitle() {    return headerTitle;}public voID setheaderTitle(String headerTitle) {    this.headerTitle = headerTitle;}public ArrayList<SingleItemmodel> getAllitemsInSection() {    return allitemsInSection;}public voID setAllitemsInSection(ArrayList<SingleItemmodel> allitemsInSection) {    this.allitemsInSection = allitemsInSection;}}

3.步骤：2

使用RecyclerVIEw创建活动以按垂直顺序显示列表.

package-name-here;import androID.os.Bundle;import androID.support.v7.app.AppCompatActivity;import androID.support.v7.Widget.linearlayoutmanager;import androID.support.v7.Widget.RecyclerVIEw;import androID.support.v7.Widget.Toolbar;import com.pratap.gplaystore.adapters.RecyclerVIEwDataAdapter;import com.pratap.gplaystore.models.SectionDataModel;import com.pratap.gplaystore.models.SingleItemmodel;import java.util.ArrayList;public class MainActivity extends AppCompatActivity {    private Toolbar toolbar;    ArrayList<SectionDataModel> allSampleData;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        toolbar = (Toolbar) findVIEwByID(R.ID.toolbar);        allSampleData = new ArrayList<SectionDataModel>();        if (toolbar != null) {            setSupportActionbar(toolbar);            toolbar.setTitle("G PlayStore");        }        createDummyData();        RecyclerVIEw my_recycler_vIEw = (RecyclerVIEw) findVIEwByID(R.ID.my_recycler_vIEw);        my_recycler_vIEw.setHasFixedSize(true);        RecyclerVIEwDataAdapter adapter = new RecyclerVIEwDataAdapter(this, allSampleData);        my_recycler_vIEw.setLayoutManager(new linearlayoutmanager(this, linearlayoutmanager.VERTICAL, false));        my_recycler_vIEw.setAdapter(adapter);    }    public voID createDummyData() {        for (int i = 1; i <= 5; i++) {            SectionDataModel dm = new SectionDataModel();            dm.setheaderTitle("Section " + i);            ArrayList<SingleItemmodel> singleItem = new ArrayList<SingleItemmodel>();            for (int j = 0; j <= 5; j++) {                singleItem.add(new SingleItemmodel("Item " + j, "URL " + j));            }            dm.setAllitemsInSection(singleItem);            allSampleData.add(dm);        }    }}

>为上述活动类创建XML布局

activity_main.xml中

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:app="http://schemas.androID.com/apk/res-auto"    androID:layout_wIDth="match_parent"    androID:layout_height="match_parent"    androID:orIEntation="vertical">    <androID.support.v7.Widget.Toolbar        androID:ID="@+ID/toolbar"        androID:layout_wIDth="match_parent"        androID:layout_height="?attr/actionbarSize"        androID:background="?attr/colorPrimary"        androID:elevation="8dp"        androID:theme="@style/themeOverlay.AppCompat.Dark.Actionbar"        app:popuptheme="@style/themeOverlay.AppCompat.light" />    <androID.support.v7.Widget.RecyclerVIEw        androID:ID="@+ID/my_recycler_vIEw"        androID:layout_wIDth="match_parent"        androID:layout_height="match_parent"        androID:scrollbars="none" /></linearLayout>

步骤：3

现在为MainActivity中的recyclerVIEw创建一个Adapter类.

RecyclerVIEwDataAdapter.java

package-name-here.adapters;import androID.content.Context;import androID.support.v7.Widget.linearlayoutmanager;import androID.support.v7.Widget.RecyclerVIEw;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.button;import androID.Widget.TextVIEw;import androID.Widget.Toast;import com.pratap.gplaystore.R;import com.pratap.gplaystore.models.SectionDataModel;import java.util.ArrayList;public class RecyclerVIEwDataAdapter extends RecyclerVIEw.Adapter<RecyclerVIEwDataAdapter.ItemRowHolder> {    private ArrayList<SectionDataModel> dataList;    private Context mContext;    public RecyclerVIEwDataAdapter(Context context, ArrayList<SectionDataModel> dataList) {        this.dataList = dataList;        this.mContext = context;    }    @OverrIDe    public ItemRowHolder onCreateVIEwHolder(VIEwGroup vIEwGroup, int i) {        VIEw v = LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.List_item, null);        ItemRowHolder mh = new ItemRowHolder(v);        return mh;    }    @OverrIDe    public voID onBindVIEwHolder(ItemRowHolder itemRowHolder, int i) {        final String sectionname = dataList.get(i).getheaderTitle();        ArrayList singleSectionItems = dataList.get(i).getAllitemsInSection();        itemRowHolder.itemTitle.setText(sectionname);        SectionListDataAdapter itemListDataAdapter = new SectionListDataAdapter(mContext, singleSectionItems);        itemRowHolder.recycler_vIEw_List.setHasFixedSize(true);        itemRowHolder.recycler_vIEw_List.setLayoutManager(new linearlayoutmanager(mContext, linearlayoutmanager.HORIZONTAL, false));        itemRowHolder.recycler_vIEw_List.setAdapter(itemListDataAdapter);        itemRowHolder.btnMore.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                Toast.makeText(v.getContext(), "click event on more, "+sectionname , Toast.LENGTH_SHORT).show();            }        });       /* GlIDe.with(mContext)                .load(FeedItem.getimageURL())                .diskCacheStrategy(diskCacheStrategy.ALL)                .centerCrop()                .error(R.drawable.bg)                .into(FeedListRowHolder.thumbVIEw);*/    }    @OverrIDe    public int getItemCount() {        return (null != dataList ? dataList.size() : 0);    }    public class ItemRowHolder extends RecyclerVIEw.VIEwHolder {        protected TextVIEw itemTitle;        protected RecyclerVIEw recycler_vIEw_List;        protected button btnMore;        public ItemRowHolder(VIEw vIEw) {            super(vIEw);            this.itemTitle = (TextVIEw) vIEw.findVIEwByID(R.ID.itemTitle);            this.recycler_vIEw_List = (RecyclerVIEw) vIEw.findVIEwByID(R.ID.recycler_vIEw_List);            this.btnMore= (button) vIEw.findVIEwByID(R.ID.btnMore);        }    }}

>现在为上述适配器类创建一个xml布局文件.

List_item.xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:background="?androID:selectableItemBackground"    androID:orIEntation="vertical"    androID:padding="5dp">    <relativeLayout        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:padding="2dp">        <TextVIEw            androID:ID="@+ID/itemTitle"            androID:layout_wIDth="wrap_content"            androID:layout_height="wrap_content"            androID:layout_alignParentleft="true"            androID:layout_alignParentStart="true"            androID:layout_centerVertical="true"            androID:layout_gravity="center_vertical"            androID:layout_toleftOf="@+ID/btnMore"            androID:text="Sample Title"            androID:textcolor="@androID:color/black"            androID:textSize="18sp" />        <button            androID:ID="@+ID/btnMore"            androID:layout_wIDth="wrap_content"            androID:layout_height="42dp"            androID:layout_alignParentEnd="true"            androID:layout_alignParentRight="true"            androID:layout_centerVertical="true"            androID:theme="@style/Mybutton"            androID:text="more"            androID:textcolor="#FFF" />    </relativeLayout>    <androID.support.v7.Widget.RecyclerVIEw        androID:ID="@+ID/recycler_vIEw_List"        androID:layout_wIDth="match_parent"        androID:layout_height="160dp"        androID:layout_gravity="center_vertical"        androID:orIEntation="horizontal" /></linearLayout>

第四步

现在,为了制作水平的RecyclerVIEw,我们需要为每一行创建一个布局和Adapter类.

List_single_card.xml

<?xml version="1.0" enCoding="utf-8"?><androID.support.v7.Widget.CardVIEw xmlns:androID="http://schemas.androID.com/apk/res/androID"    xmlns:app="http://schemas.androID.com/apk/res-auto"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:orIEntation="horizontal"    app:cardCornerRadius="5dp"    app:cardUseCompatpadding="true"    >    <linearLayout        androID:layout_wIDth="match_parent"        androID:layout_height="wrap_content"        androID:padding="0dp"        androID:background="?androID:selectableItemBackground"        androID:orIEntation="vertical">        <ImageVIEw            androID:ID="@+ID/itemImage"            androID:layout_wIDth="100dp"            androID:layout_height="100dp"            androID:layout_gravity="center_horizontal"            androID:scaleType="fitCenter"            androID:src="@drawable/androID" />        <TextVIEw            androID:ID="@+ID/tvTitle"            androID:layout_wIDth="match_parent"            androID:layout_height="wrap_content"            androID:layout_below="@ID/itemImage"            androID:gravity="center"            androID:padding="5dp"            androID:text="Sample Title"            androID:textcolor="@androID:color/black"            androID:textSize="18sp" />    </linearLayout></androID.support.v7.Widget.CardVIEw>

>最后,适用于Horizo​​ntal RecyclerVIEw的适配器类

SectionListDataAdapter.java

package-name-here.adapters;import androID.content.Context;import androID.support.v7.Widget.RecyclerVIEw;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.Widget.ImageVIEw;import androID.Widget.TextVIEw;import androID.Widget.Toast;import com.pratap.gplaystore.R;import com.pratap.gplaystore.models.SingleItemmodel;import java.util.ArrayList;public class SectionListDataAdapter extends RecyclerVIEw.Adapter<SectionListDataAdapter.SingleItemRowHolder> {    private ArrayList<SingleItemmodel> itemsList;    private Context mContext;    public SectionListDataAdapter(Context context, ArrayList<SingleItemmodel> itemsList) {        this.itemsList = itemsList;        this.mContext = context;    }    @OverrIDe    public SingleItemRowHolder onCreateVIEwHolder(VIEwGroup vIEwGroup, int i) {        VIEw v = LayoutInflater.from(vIEwGroup.getContext()).inflate(R.layout.List_single_card, null);        SingleItemRowHolder mh = new SingleItemRowHolder(v);        return mh;    }    @OverrIDe    public voID onBindVIEwHolder(SingleItemRowHolder holder, int i) {        SingleItemmodel singleItem = itemsList.get(i);        holder.tvTitle.setText(singleItem.getname());       /* GlIDe.with(mContext)                .load(FeedItem.getimageURL())                .diskCacheStrategy(diskCacheStrategy.ALL)                .centerCrop()                .error(R.drawable.bg)                .into(FeedListRowHolder.thumbVIEw);*/    }    @OverrIDe    public int getItemCount() {        return (null != itemsList ? itemsList.size() : 0);    }    public class SingleItemRowHolder extends RecyclerVIEw.VIEwHolder {        protected TextVIEw tvTitle;        protected ImageVIEw itemImage;        public SingleItemRowHolder(VIEw vIEw) {            super(vIEw);            this.tvTitle = (TextVIEw) vIEw.findVIEwByID(R.ID.tvTitle);            this.itemImage = (ImageVIEw) vIEw.findVIEwByID(R.ID.itemImage);            vIEw.setonClickListener(new VIEw.OnClickListener() {                @OverrIDe                public voID onClick(VIEw v) {                    Toast.makeText(v.getContext(), tvTitle.getText(), Toast.LENGTH_SHORT).show();                }            });        }    }}

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