我有三种不同的布局cardListLayout,TitleLayout,cardMagazineLayout,将来可能会有更多,用作onCreateVIEwHolder方法的视图.
我想在onCreateVIEwHolder方法中切换视图,以便用户从AlertDialog列表中选择
这个在MainActivity中的onoptionsItemSelected其中有菜单项“更改布局”,以便当用户按下它时出现AlertDialog列表
@OverrIDe public boolean onoptionsItemSelected(MenuItem item) { if (item.getItemID() == R.ID.change_layout) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle(getString(R.string.choose_layout)); String[] layouts = {"Title Layout", "Cards List", "Card Magazine Layout"}; builder.setItems(layouts, new DialogInterface.OnClickListener() { @OverrIDe public voID onClick(DialogInterface dialog, int index) { switch (index) { case 0: // Title layout Toast.makeText(MainActivity.this, "Title layout", Toast.LENGTH_LONG).show(); break; case 1: // Cards List Toast.makeText(MainActivity.this, "Card List", Toast.LENGTH_LONG).show(); break; case 2: // Cards Magazine Layout Toast.makeText(MainActivity.this, "Card Magazine Layout", Toast.LENGTH_LONG).show(); } } });这是我的自定义适配器类PostAdapter
public class PostAdapter extends RecyclerVIEw.Adapter<PostAdapter.PostVIEwHolder> { private Context context; private List<Item> items; public PostAdapter(Context context, List<Item> items) { this.context = context; this.items = items; } @NonNull @OverrIDe public PostAdapter.PostVIEwHolder onCreateVIEwHolder(@NonNull VIEwGroup parent, int vIEwType) { LayoutInflater inflater = LayoutInflater.from(context);// here's the three layouts that I can't switch between it VIEw cardsListLayout = inflater.inflate(R.layout.post_item_card_layout, parent, false); VIEw TitleLayout = inflater.inflate(R.layout.post_item_grID_layout, parent, false); VIEw cardMagazineLayout = inflater.inflate(R.layout.card_magazine_layout,parent,false); return new PostVIEwHolder(TitleLayout); } @OverrIDe public voID onBindVIEwHolder(@NonNull PostVIEwHolder holder, int position) { final Item item = items.get(position); holder.postTitle.setText(item.getTitle()); final document document = Jsoup.parse(item.getContent()); Elements elements = document.select("img"); Log.e("CODE", "Image: " + elements.get(0).attr("src"));// Log.d("Text",document.text());// holder.postDescription.setText(document.text()); GlIDe.with(context).load(elements.get(0).attr("src")) .into(holder.postimage); holder.itemVIEw.setonClickListener(new VIEw.OnClickListener() { @OverrIDe public voID onClick(VIEw vIEw) { Intent intent = new Intent(context, DetailsActivity.class); intent.putExtra("url", item.getUrl()); intent.putExtra("Title", item.getTitle()); intent.putExtra("content", item.getContent()); int youtubethumbnailimagesetVisibility = 0; Element element = document.body(); String youtubethumbnailImageSrc = ""; String youTubelink = ""; for (Element e : element.getElementsByClass ("YOUTUBE-iframe-vIDeo")) { youtubethumbnailImageSrc = e.attr("data-thumbnail-src"); youTubelink = e.attr("src"); Log.e("YouTube thumbnail", youtubethumbnailImageSrc); Log.e("Youtube link", youTubelink); } if (youtubethumbnailImageSrc.isEmpty()) { youtubethumbnailimagesetVisibility = 8; intent.putExtra("youtubethumbnailimagesetVisibility", youtubethumbnailimagesetVisibility); } else { intent.putExtra("youtubethumbnailImageSrc", youtubethumbnailImageSrc); intent.putExtra("youTubelink", youTubelink); }// String imageSrc = elements.get(0).attr("src");// intent.putExtra("blogImage",imageSrc); context.startActivity(intent); } }); } @OverrIDe public int getItemCount() { return items.size(); } public class PostVIEwHolder extends RecyclerVIEw.VIEwHolder { ImageVIEw postimage; TextVIEw postTitle; TextVIEw postDescription; public PostVIEwHolder(VIEw itemVIEw) { super(itemVIEw); postimage = itemVIEw.findVIEwByID(R.ID.postimage); postTitle = itemVIEw.findVIEwByID(R.ID.postTitle); postDescription = itemVIEw.findVIEwByID(R.ID.postDescription); } }}我为每一个创建了两个不同的布局管理器,有一个linearlayoutmanager和GrIDLayoutManager,目前我使用了GrIDLayout,所以我暂时评论了linearLayoutmanger,直到我知道如何在它们之间切换
// linearlayoutmanager = new linearlayoutmanager(this); grIDLayoutManager = new GrIDLayoutManager(this, 2, RecyclerVIEw.VERTICAL, false);// recyclerVIEw.setLayoutManager(linearlayoutmanager); recyclerVIEw.setLayoutManager(grIDLayoutManager);我渴望的结果
解决方法:
无需为此使用多个RecyclervIEw
您可以使用具有多个vIEwType的单个RecyclervIEw实现此目的
当您想要更改RecyclervIEw的布局时,只需更改RecyclervIEw的LayoutManager和vIEwType即可
示例代码
试试这种方式
首先为多个vIEwType创建三个布局
grID_layout
<?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="150dp" androID:layout_height="150dp" app:cardElevation="10dp" app:cardUseCompatpadding="true"> <relativeLayout androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:orIEntation="vertical"> <ImageVIEw androID:layout_wIDth="match_parent" androID:layout_height="150dp" androID:adjustVIEwBounds="true" androID:contentDescription="@string/app_name" androID:scaleType="centerCrop" androID:src="@drawable/dishu" /> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_alignParentBottom="true" androID:background="#6a000000" androID:gravity="center" androID:padding="10dp" androID:text="dummy text" androID:textcolor="@androID:color/white" /> </relativeLayout></androID.support.v7.Widget.CardVIEw>cardList_layout
<?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" app:cardElevation="10dp" app:cardUseCompatpadding="true"> <linearLayout androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_gravity="center" androID:orIEntation="vertical"> <ImageVIEw androID:layout_wIDth="match_parent" androID:layout_height="150dp" androID:adjustVIEwBounds="true" androID:contentDescription="@string/app_name" androID:scaleType="centerCrop" androID:src="@drawable/dishu" /> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:paddingStart="5dp" androID:paddingEnd="10dp" androID:text="Dummy Title" androID:textcolor="@androID:color/black" androID:textStyle="bold" /> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:paddingStart="5dp" androID:paddingEnd="10dp" androID:text="Dummy Tex" /> </linearLayout></androID.support.v7.Widget.CardVIEw>Title_layout
<?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" app:cardElevation="10dp" app:cardUseCompatpadding="true"> <linearLayout androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:layout_gravity="center"> <linearLayout androID:layout_wIDth="0dp" androID:layout_height="wrap_content" androID:layout_weight="1" androID:orIEntation="vertical"> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:paddingStart="5dp" androID:paddingEnd="5dp" androID:text="dummy text" androID:textcolor="@androID:color/black" androID:textStyle="bold" /> <TextVIEw androID:layout_wIDth="match_parent" androID:layout_height="wrap_content" androID:gravity="start" androID:paddingStart="5dp" androID:paddingEnd="5dp" androID:text="I have three different layouts cardsListLayout , TitleLayout , cardMagazineLayoutand there may be more in the future, which used as a vIEws on onCreateVIEwHolder method." /> </linearLayout> <ImageVIEw androID:layout_wIDth="wrap_content" androID:layout_height="150dp" androID:adjustVIEwBounds="true" androID:contentDescription="@string/app_name" androID:scaleType="centerCrop" androID:src="@drawable/dishu" /> </linearLayout></androID.support.v7.Widget.CardVIEw>DataAdapter
package neel.com.recyclervIEwdemo;import androID.content.Context;import androID.support.annotation.NonNull;import androID.support.v7.Widget.RecyclerVIEw;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;public class DataAdapter extends RecyclerVIEw.Adapter<RecyclerVIEw.VIEwHolder> { public static final int ITEM_TYPE_GRID = 0; public static final int ITEM_TYPE_CARD_List = 1; public static final int ITEM_TYPE_Title_List = 2; private Context mContext; private int VIEW_TYPE = 0; public DataAdapter(Context mContext) { this.mContext = mContext; } public voID setVIEW_TYPE(int vIEwType) { VIEW_TYPE = vIEwType; notifyDataSetChanged(); } @NonNull @OverrIDe public RecyclerVIEw.VIEwHolder onCreateVIEwHolder(@NonNull VIEwGroup parent, int vIEwType) { VIEw vIEw = null; // check here the vIEwType and return RecyclerVIEw.VIEwHolder based on vIEw type switch (VIEW_TYPE) { case ITEM_TYPE_GRID: // if VIEW_TYPE is GrID than return GrIDVIEwHolder vIEw = LayoutInflater.from(mContext).inflate(R.layout.grID_layout, parent, false); return new GrIDVIEwHolder(vIEw); case ITEM_TYPE_CARD_List: // if VIEW_TYPE is Card List than return CardListVIEwHolder vIEw = LayoutInflater.from(mContext).inflate(R.layout.cardList_layout, parent, false); return new CardListVIEwHolder(vIEw); case ITEM_TYPE_Title_List: // if VIEW_TYPE is Title List than return TitleListVIEwHolder vIEw = LayoutInflater.from(mContext).inflate(R.layout.Title_layout, parent, false); return new TitleListVIEwHolder(vIEw); } return new GrIDVIEwHolder(vIEw); } @OverrIDe public voID onBindVIEwHolder(@NonNull RecyclerVIEw.VIEwHolder holder, int position) { final int itemType = getItemVIEwType(position); // First check here the VIEw Type // than set data based on VIEw Type to your recyclervIEw item if (itemType == ITEM_TYPE_GRID) { if (holder instanceof CardVIEwHolder) { GrIDVIEwHolder vIEwHolder = (GrIDVIEwHolder) holder; // write here code for your grID List } } else if (itemType == ITEM_TYPE_CARD_List) { if (holder instanceof CardVIEwHolder) { CardListVIEwHolder buttonVIEwHolder = (CardListVIEwHolder) holder; // write here code for your grID List } } else if (itemType == ITEM_TYPE_Title_List) { if (holder instanceof CardVIEwHolder) { TitleListVIEwHolder buttonVIEwHolder = (TitleListVIEwHolder) holder; // write here code for your TitleListVIEwHolder } } } @OverrIDe public int getItemCount() { return 40; } // RecyclerVIEw.VIEwHolder class for grIDLayoutManager public class GrIDVIEwHolder extends RecyclerVIEw.VIEwHolder { public GrIDVIEwHolder(@NonNull VIEw itemVIEw) { super(itemVIEw); } } // RecyclerVIEw.VIEwHolder class for Card List VIEw public class CardListVIEwHolder extends RecyclerVIEw.VIEwHolder { public CardListVIEwHolder(@NonNull VIEw itemVIEw) { super(itemVIEw); } } // RecyclerVIEw.VIEwHolder class for Title List VIEw public class TitleListVIEwHolder extends RecyclerVIEw.VIEwHolder { public TitleListVIEwHolder(@NonNull VIEw itemVIEw) { super(itemVIEw); } }}MainActivity
package neel.com.recyclervIEwdemo;import androID.content.DialogInterface;import androID.os.Bundle;import androID.support.v7.app.AlertDialog;import androID.support.v7.app.AppCompatActivity;import androID.support.v7.Widget.GrIDLayoutManager;import androID.support.v7.Widget.linearlayoutmanager;import androID.support.v7.Widget.RecyclerVIEw;import androID.vIEw.Menu;import androID.vIEw.MenuInflater;import androID.vIEw.MenuItem;public class MainActivity extends AppCompatActivity { DataAdapter dataAdapter; private RecyclerVIEw myRecyclerVIEw; private linearlayoutmanager linearlayoutmanager; private GrIDLayoutManager grIDLayoutManager; @OverrIDe protected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(R.layout.activity_main); myRecyclerVIEw = findVIEwByID(R.ID.myRecyclerVIEw); myRecyclerVIEw.setHasFixedSize(true); linearlayoutmanager = new linearlayoutmanager(this); grIDLayoutManager = new GrIDLayoutManager(this, 3); myRecyclerVIEw.setLayoutManager(grIDLayoutManager); dataAdapter = new DataAdapter(this); myRecyclerVIEw.setAdapter(dataAdapter); } @OverrIDe public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.home_menu, menu); // return true so that the menu pop up is opened return true; } @OverrIDe public boolean onoptionsItemSelected(MenuItem item) { if (item.getItemID() == R.ID.action_dialog) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Please choose a layout"); String[] layouts = {"Title Layout", "Cards List", "GrID VIEw"}; builder.setItems(layouts, new DialogInterface.OnClickListener() { @OverrIDe public voID onClick(DialogInterface dialog, int index) { switch (index) { case 0: // Title layout dataAdapter.setVIEW_TYPE(2); myRecyclerVIEw.setLayoutManager(linearlayoutmanager); myRecyclerVIEw.setAdapter(dataAdapter); break; case 1: // Cards List dataAdapter.setVIEW_TYPE(1); myRecyclerVIEw.setLayoutManager(linearlayoutmanager); myRecyclerVIEw.setAdapter(dataAdapter); break; case 2: // GrID Layout dataAdapter.setVIEW_TYPE(0); myRecyclerVIEw.setLayoutManager(grIDLayoutManager); myRecyclerVIEw.setAdapter(dataAdapter); } } }); builder.show(); } return super.onoptionsItemSelected(item); }}activity_main layout
<?xml version="1.0" enCoding="utf-8"?><linearLayout xmlns:androID="http://schemas.androID.com/apk/res/androID" xmlns:tools="http://schemas.androID.com/tools" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" androID:orIEntation="vertical" tools:context=".MainActivity"> <androID.support.v7.Widget.RecyclerVIEw androID:ID="@+ID/myRecyclerVIEw" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" /></linearLayout>OUTPUT
https://youtu.be/L3slKTy2bzI
总结以上是内存溢出为你收集整理的android – 单击AlertDialog项目列表时在RecyclerView布局之间切换全部内容，希望文章能够帮你解决android – 单击AlertDialog项目列表时在RecyclerView布局之间切换所遇到的程序开发问题。
如果觉得内存溢出网站内容还不错，欢迎将内存溢出网站推荐给程序员好友。
欢迎分享，转载请注明来源：内存溢出
微信扫一扫
支付宝扫一扫
评论列表（0条）