在Android的垂直列表内实现horizo​​ntalList

概述我做了一个自定义的“水平列表”视图,它工作正常.然后,我在ListView控件中实现了相同的水平列表.但是,当我运行相同的命令时,得到的只是空白输出.该列表似乎没有增加.在调试时,我发现添加到列表视图的适配器包含项(水平列表).因此,问题显然不在于项目未正确填充,其视图未正确呈现

我做了一个自定义的“水平列表”视图,它工作正常.然后,我在ListVIEw控件中实现了相同的水平列表.但是,当我运行相同的命令时,得到的只是空白输出.该列表似乎没有增加.

在调试时,我发现添加到列表视图的适配器包含项(水平列表).

因此,问题显然不在于项目未正确填充,其视图未正确呈现.

这是垂直列表视图的代码：

XML：

<linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:orIEntation="vertical" androID:layout_wIDth="match_parent"    androID:layout_height="match_parent">    <com.example.twowayListvIEw.horizontallistVIEw        androID:ID="@+ID/lstHor"        androID:layout_height="100dp"        androID:layout_wIDth="fill_parent">    </com.example.twowayListvIEw.horizontallistVIEw></linearLayout>

这是水平列表中单个项目的XML

<relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"    androID:layout_wIDth="match_parent" androID:layout_height="100dp">    <ImageVIEw        androID:ID="@+ID/imgListItem"        androID:layout_height="85dp"        androID:layout_wIDth="85dp"      ..            />   ...</relativeLayout>

让我知道您是否需要Java代码.谢谢.

解决方法:

发布AndroID L开发者预览版后,Google提供了一个名为RecyclerVIEw的新视图,该视图可以替代ListVIEw和GrIDVIEw,这样可以更轻松地创建水平列表,因此我在此处更新了答案.

目前,我们不再需要使用任何库,RecyclerVIEw就足够了.这是我通过RecyclerVIEw列出水平代码的代码(我不打算解释RecyclerVIEw的详细用法)：

MainActivity.java

public class MainActivity extends AppCompatActivity {    List<List<String>> mDataList;    private RecyclerVIEw mVerticalList;    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        prepareData();        initListVIEw();    }    private voID prepareData() {        mDataList = new ArrayList<>();        int vItemCount = 25;        int hItemCount = 20;        for (int i = 0; i < vItemCount; i++) {            List<String> hList = new ArrayList<>();            for (int j = 0; j < hItemCount; j++) {                hList.add("Item." + j);            }            mDataList.add(hList);        }    }    private voID initListVIEw() {        mVerticalList = (RecyclerVIEw) findVIEwByID(R.ID.vertical_List);        mVerticalList.setLayoutManager(new linearlayoutmanager(this, linearlayoutmanager.VERTICAL, false));        VerticalAdapter verticalAdapter = new VerticalAdapter();        verticalAdapter.setData(mDataList);        mVerticalList.setAdapter(verticalAdapter);    }    private static class VerticalAdapter extends RecyclerVIEw.Adapter<RecyclerVIEw.VIEwHolder> {        private List<List<String>> mDataList;        public VerticalAdapter() {        }        public voID setData(List<List<String>> data) {            mDataList = data;            notifyDataSetChanged();        }        private class horizontallistVIEwHolder extends RecyclerVIEw.VIEwHolder {            private TextVIEw Title;            private RecyclerVIEw horizontallist;            private HorizontalAdapter horizontalAdapter;            public horizontallistVIEwHolder(VIEw itemVIEw) {                super(itemVIEw);                Context context = itemVIEw.getContext();                Title = (TextVIEw) itemVIEw.findVIEwByID(R.ID.item_Title);                horizontallist = (RecyclerVIEw) itemVIEw.findVIEwByID(R.ID.item_horizontal_List);                horizontallist.setLayoutManager(new linearlayoutmanager(context, linearlayoutmanager.HORIZONTAL, false));                horizontalAdapter = new HorizontalAdapter();                horizontallist.setAdapter(horizontalAdapter);            }        }        @OverrIDe        public RecyclerVIEw.VIEwHolder onCreateVIEwHolder(VIEwGroup parent, int vIEwType) {            Context context = parent.getContext();            VIEw itemVIEw = LayoutInflater.from(context).inflate(R.layout.vertical_List_item, parent, false);            horizontallistVIEwHolder holder = new horizontallistVIEwHolder(itemVIEw);            return holder;        }        @OverrIDe        public voID onBindVIEwHolder(RecyclerVIEw.VIEwHolder rawHolder, int position) {            horizontallistVIEwHolder holder = (horizontallistVIEwHolder) rawHolder;            holder.Title.setText("Horizontal List No." + position);            holder.horizontalAdapter.setData(mDataList.get(position));            holder.horizontalAdapter.setRowIndex(position);        }        @OverrIDe        public int getItemCount() {            return mDataList.size();        }    }    private static class HorizontalAdapter extends RecyclerVIEw.Adapter<RecyclerVIEw.VIEwHolder> {        private List<String> mDataList;        private int mRowIndex = -1;        private int[] mcolors = new int[]{color.RED, color.BLUE, color.GREEN, color.magenta, color.DKGRAY};        public HorizontalAdapter() {        }        public voID setData(List<String> data) {            if (mDataList != data) {                mDataList = data;                notifyDataSetChanged();            }        }        public voID setRowIndex(int index) {            mRowIndex = index;        }        private class ItemVIEwHolder extends RecyclerVIEw.VIEwHolder {            private TextVIEw text;            public ItemVIEwHolder(VIEw itemVIEw) {                super(itemVIEw);                text = (TextVIEw) itemVIEw.findVIEwByID(R.ID.item_text);                itemVIEw.setonClickListener(mItemClickListener);            }        }        @OverrIDe        public RecyclerVIEw.VIEwHolder onCreateVIEwHolder(VIEwGroup parent, int vIEwType) {            Context context = parent.getContext();            VIEw itemVIEw = LayoutInflater.from(context).inflate(R.layout.horizontal_List_item, parent, false);            ItemVIEwHolder holder = new ItemVIEwHolder(itemVIEw);            return holder;        }        @OverrIDe        public voID onBindVIEwHolder(RecyclerVIEw.VIEwHolder rawHolder, int position) {            ItemVIEwHolder holder = (ItemVIEwHolder) rawHolder;            holder.text.setText(mDataList.get(position));            holder.itemVIEw.setBackgroundcolor(mcolors[position % mcolors.length]);            holder.itemVIEw.setTag(position);        }        @OverrIDe        public int getItemCount() {            return mDataList.size();        }        private VIEw.OnClickListener mItemClickListener = new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                int columnIndex = (int) v.getTag();                int rowIndex = mRowIndex;                String text = String.format("rowIndex:%d ,columnIndex:%d", rowIndex, columnIndex);                showToast(v.getContext(), text);                Log.d("test", text);            }        };    }    private static Toast sToast;    public static voID showToast(Context context, String text) {        if (sToast != null) {            sToast.cancel();        }        sToast = Toast.makeText(context, text, Toast.LENGTH_LONG);        sToast.show();    }}

activity_main.xml中

<relativeLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"                androID:layout_wIDth="match_parent"                androID:layout_height="match_parent">    <androID.support.v7.Widget.RecyclerVIEw        androID:ID="@+ID/vertical_List"        androID:layout_wIDth="match_parent"        androID:layout_height="match_parent"/></relativeLayout>

horizo​​ntal_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:paddingleft="10dp"    androID:paddingRight="10dp"    androID:orIEntation="vertical">    <TextVIEw        androID:ID="@+ID/item_text"        androID:textcolor="@androID:color/white"        androID:layout_wIDth="match_parent"        androID:layout_height="50dp"        androID:gravity="center_vertical"/></linearLayout>

vertical_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:orIEntation="vertical">    <TextVIEw        androID:ID="@+ID/item_Title"        androID:background="@androID:color/darker_gray"        androID:layout_wIDth="match_parent"        androID:layout_height="48dp"        androID:gravity="center_vertical"/>    <androID.support.v7.Widget.RecyclerVIEw        androID:ID="@+ID/item_horizontal_List"        androID:layout_wIDth="match_parent"        androID:layout_height="50dp"/></linearLayout>

于2015-05-20更新

旧答案：

我已经使用TwoWayView像您一样在垂直列表视图中显示水平列表.这是我的垂直和水平ListvIEw适配器代码.它对我来说很好用,所有视图都是可重用的,所有行都单独滚动.希望对您有所帮助.

public class RecommendAppAdapter extends BaseAdapter implements    OnItemClickListener {public static final String TAG = "RecommendAppAdapter";//Vertical List dataprivate Map<String, List<RecommendApp>> mMapData = new TreeMap<String, List<RecommendApp>>();private OnItemClickListener mOnItemClickListener = null;//Vertical List adapterpublic RecommendAppAdapter(Context context) {}@OverrIDepublic boolean isEmpty() {    return mMapData == null || mMapData.isEmpty();}@OverrIDepublic int getCount() {    if (!isEmpty()) {        return mMapData.size();    } else {        return 0;    }}//Get horiZental List data@OverrIDepublic List<RecommendApp> getItem(int position) {    if (!isEmpty() && isAvaliablePostion(position)) {        Iterator<Entry<String, List<RecommendApp>>> entrIEs = mMapData                .entrySet().iterator();        int i = 0;        Entry<String, List<RecommendApp>> entry = null;        while (entrIEs.hasNext()) {            entry = entrIEs.next();            if (i == position) {                return entry.getValue();            }            i++;        }    }    return null;}@OverrIDepublic long getItemID(int position) {    return position;}@OverrIDepublic VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {    VIEwHolder holder = null;    ItemAdapter innerlistadapter = null;    if (convertVIEw == null) {        holder = new VIEwHolder();        convertVIEw = LayoutInflater.from(parent.getContext()).inflate(                R.layout.item_recommend_app, null);        //Some vIEws in vertical List        holder.type = (TextVIEw) convertVIEw                .findVIEwByID(R.ID.item_rec_app_type_name);        //Get horiZental List vIEw        holder.hListVIEw = (TwoWayVIEw) convertVIEw                .findVIEwByID(R.ID.item_rec_app_List);        //Bind adapter on horiZental List        innerlistadapter = new ItemAdapter();        holder.hListVIEw.setAdapter(innerlistadapter);        //Bind item click Listener on horiZental List        holder.hListVIEw.setonItemClickListener(this);        convertVIEw.setTag(holder);    } else {        holder = (VIEwHolder) convertVIEw.getTag();        innerlistadapter = (ItemAdapter) holder.hListVIEw.getAdapter();    }    //Get horiZental List data    List<RecommendApp> itemList = getItem(position);    holder.type.setText(itemList.get(0).getTypename());    //Deliver horiZental List adapter data    innerlistadapter.setData(itemList);    return convertVIEw;}@OverrIDepublic voID onItemClick(AdapterVIEw<?> parent, VIEw vIEw, int position,        long ID) {    switch (parent.getID()) {    case R.ID.item_rec_app_List:        if (mOnItemClickListener != null) {            mOnItemClickListener.onItemClick(parent, vIEw, position, ID);        }        break;    }}public voID setonItemClickListener(OnItemClickListener Listener) {    mOnItemClickListener = Listener;}public voID setData(Map<String, List<RecommendApp>> data) {    mMapData.clear();    if (data != null && !data.isEmpty()) {        mMapData.putAll(data);    }    notifyDataSetChanged();}private boolean isAvaliablePostion(int position) {    if (position >= 0 && position < getCount()) {        return true;    } else {        return false;    }}private class VIEwHolder {    public TextVIEw type;    public TwoWayVIEw hListVIEw;}//Horizontal List adapter//All work are just like the normal use of ListVIEw private class ItemAdapter extends BaseAdapter {    //Horizontal List data    private List<RecommendApp> mInnerData = null;    private FinalBitmap mFinalBitmap = FinalBitmap.create(MyApp            .getInstance());    @OverrIDe    public boolean isEmpty() {        return mInnerData == null || mInnerData.isEmpty();    }    @OverrIDe    public int getCount() {        if (!isEmpty()) {            return mInnerData.size();        }        return 0;    }    @OverrIDe    public RecommendApp getItem(int position) {        if (position >= 0 && position < getCount()) {            return mInnerData.get(position);        }        return null;    }    @OverrIDe    public long getItemID(int position) {        return position;    }    @OverrIDe    public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {        VIEwHolderInner holder = null;        if (convertVIEw == null) {            holder = new VIEwHolderInner();            Context context = parent.getContext();            convertVIEw = LayoutInflater.from(context).inflate(                    R.layout.item_recommend_app_inner, null);            holder.name = (TextVIEw) convertVIEw                    .findVIEwByID(R.ID.item_rec_app_inner_name);            holder.icon = (ImageVIEw) convertVIEw                    .findVIEwByID(R.ID.item_rec_app_inner_icon);            convertVIEw.setTag(holder);        } else {            holder = (VIEwHolderInner) convertVIEw.getTag();        }        RecommendApp item = ItemAdapter.this.getItem(position);        holder.name.setText(item.getAppname());        mFinalBitmap.display(holder.icon, item.getIcon());        return convertVIEw;    }    public voID setData(List<RecommendApp> data) {        mInnerData = data;        notifyDataSetChanged();    }    private class VIEwHolderInner {        public TextVIEw name;        public ImageVIEw icon;    }}

}

编辑1

RecommendApp是一个POJO,其中包含在水平列表中显示的项目数据.

item_recommend_app.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="match_parent"androID:orIEntation="vertical" ><TextVIEw    androID:ID="@+ID/item_rec_app_type_name"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:background="@color/item_rec_app_type_name_bg"    androID:gravity="left|center_vertical"    androID:paddingBottom="@dimen/item_rec_app_type_name_paddingBottom"    androID:paddingleft="@dimen/item_rec_app_type_name_paddingleft"    androID:paddingtop="@dimen/item_rec_app_type_name_paddingtop"    androID:textAppearance="?androID:attr/textAppearanceMedium"    androID:textIsSelectable="false" /><com.phonetools.appmanager.Widget.TwoWayVIEw    androID:ID="@+ID/item_rec_app_List"    androID:layout_wIDth="match_parent"    androID:layout_height="wrap_content"    androID:orIEntation="horizontal" />

item_recommend_app_inner.xml：

<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID"androID:layout_wIDth="wrap_content"androID:layout_height="wrap_content"androID:orIEntation="vertical"androID:padding="@dimen/item_rec_app_inner_padding" ><ImageVIEw    androID:ID="@+ID/item_rec_app_inner_icon"    androID:layout_wIDth="@dimen/item_rec_app_inner_icon_wIDth"    androID:layout_height="@dimen/item_rec_app_inner_icon_height"    androID:layout_gravity="center"    androID:contentDescription="@string/image_desc"    androID:scaleType="fitCenter" /><TextVIEw    androID:ID="@+ID/item_rec_app_inner_name"    androID:layout_wIDth="@dimen/item_rec_app_inner_icon_wIDth"    androID:layout_height="wrap_content"    androID:layout_gravity="center"    androID:ellipsize="end"    androID:gravity="center"    androID:singleline="true"    androID:textAppearance="?androID:attr/textAppearanceSmall"    androID:textIsSelectable="false" />

RecommendApp.java：

public class RecommendApp {public RecommendApp() {}private String packagename;private String appname;private String versionname;private float size;private String icon;private int typeID;private String typename;private String installlink;private String description;private float ratingscore;private long installedSum;

}

总结

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