與火力地堡查詢實施火力地堡本土快遞廣告

B）我用PostListFragment.java顯示帖子生成的動態列表AdMob原生廣告明確和職位適配器RVAdapter。 java的

C）加載和編程顯示廣告和它正常工作與靜態列表

d），這是動態列表：

mPosts = getPosts(postsQuery);

F），這是靜態列表：

mPosts = new ArrayList<>(); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
mPosts.add(new Post("key" , "uid" , "author" , "title" , "body"));

的錯誤是： - 當我使用靜態列表，它工作正常，沒有崩潰，我得到了NativeExpressAd每8個位置，但是當我更換這個靜態列表動態列表（來自火力查詢來）崩潰，因爲鑄造的問題，而列表大小爲零，即使有屏幕

這裏所顯示的帖子是我的適配器代碼：

package com.google.firebase.quickstart.database; 

import android.content.Context; 
import android.content.Intent; 
import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import com.google.android.gms.ads.NativeExpressAdView; 
import com.google.firebase.auth.FirebaseAuth; 
import com.google.firebase.database.DataSnapshot; 
import com.google.firebase.database.DatabaseError; 
import com.google.firebase.database.DatabaseReference; 
import com.google.firebase.database.MutableData; 
import com.google.firebase.database.Transaction; 
import com.google.firebase.quickstart.database.fragment.PostListFragment; 
import com.google.firebase.quickstart.database.models.Post; 
import com.google.firebase.quickstart.database.viewholder.NativeExpressAdViewHolder; 
import com.google.firebase.quickstart.database.viewholder.PostViewHolder; 
import java.util.List; 

public class RVAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> { 

    private static final int POST = 0; 
    private static final int AD = 1; 

    Context context; 
    List<Object> mPosts; 
    DatabaseReference mDatabase; 

    public RVAdapter(Context context, List<Object> mPosts , DatabaseReference mDatabase) { 
     this.context = context; 
     this.mPosts = mPosts; 
     this.mDatabase = mDatabase; 
    } 


    @Override 
    public int getItemCount() { 
     return mPosts.size(); 
    } 

    @Override 
    public int getItemViewType(int position) { 
     return (position % PostListFragment.ITEMS_PER_AD == 0) ? AD : POST; 
    } 


    @Override 
    public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) { 
     switch (viewType) { 
      case POST: 
       View menuItemLayoutView = LayoutInflater.from(viewGroup.getContext()).inflate(
         R.layout.item_post, viewGroup, false); 
       return new PostViewHolder(menuItemLayoutView); 
      case AD: 
       // fall through 
      default: 
       View nativeExpressLayoutView = LayoutInflater.from(
         viewGroup.getContext()).inflate(R.layout.item_ad, 
         viewGroup, false); 
       return new NativeExpressAdViewHolder(nativeExpressLayoutView); 
     } 

    } 

    @Override 
    public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 
     int viewType = getItemViewType(position); 
     switch (viewType) { 
      case POST: 
       configurePost(holder , position); 
       break; 
      case AD: 
       // fall through 
      default: 
       configureAd(holder , position); 
     } 
    } 

    public void configureAd(RecyclerView.ViewHolder holder , int position){ 
     NativeExpressAdViewHolder nativeExpressHolder = (NativeExpressAdViewHolder) holder; 
     NativeExpressAdView adView = (NativeExpressAdView) mPosts.get(position); 
     ViewGroup adCardView = (ViewGroup) nativeExpressHolder.itemView; 
     if (adCardView.getChildCount() > 0) { 
      adCardView.removeAllViews(); 
     } 
     // Add the Native Express ad to the native express ad view. 
     adCardView.addView(adView); 
    } 

    public void configurePost (RecyclerView.ViewHolder holder , int position){ 
     final PostViewHolder viewHolder = (PostViewHolder) holder; 
     final Post model = (Post) mPosts.get(position); 
     final String postKey = model.key; 
     viewHolder.itemView.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       // Launch PostDetailActivity 
       Intent intent = new Intent(context, PostDetailActivity.class); 
       intent.putExtra(PostDetailActivity.EXTRA_POST_KEY, postKey); 
       context.startActivity(intent); 
      } 
     }); 

     // Determine if the current user has liked this post and set UI accordingly 
     if (model.stars.containsKey(getUid())) { 
      viewHolder.starView.setImageResource(R.drawable.ic_toggle_star_24); 
     } else { 
      viewHolder.starView.setImageResource(R.drawable.ic_toggle_star_outline_24); 
     } 

     // Bind Post to ViewHolder, setting OnClickListener for the star button 
     viewHolder.bindToPost(model, new View.OnClickListener() { 
      @Override 
      public void onClick(View starView) { 
       // Need to write to both places the post is stored 
       DatabaseReference globalPostRef = mDatabase.child("posts").child(postKey); 
       DatabaseReference userPostRef = mDatabase.child("user-posts").child(model.uid).child(postKey); 

       // Run two transactions 
       onStarClicked(globalPostRef); 
       onStarClicked(userPostRef); 
      } 
     }); 

    } 

    private void onStarClicked(DatabaseReference postRef) { 
     postRef.runTransaction(new Transaction.Handler() { 
      @Override 
      public Transaction.Result doTransaction(MutableData mutableData) { 
       Post p = mutableData.getValue(Post.class); 
       if (p == null) { 
        return Transaction.success(mutableData); 
       } 

       if (p.stars.containsKey(getUid())) { 
        // Unstar the post and remove self from stars 
        p.starCount = p.starCount - 1; 
        p.stars.remove(getUid()); 
       } else { 
        // Star the post and add self to stars 
        p.starCount = p.starCount + 1; 
        p.stars.put(getUid(), true); 
       } 

       // Set value and report transaction success 
       mutableData.setValue(p); 
       return Transaction.success(mutableData); 
      } 

      @Override 
      public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) { 
       // Transaction completed 
      } 
     }); 
    } 

    public String getUid() { 
     return FirebaseAuth.getInstance().getCurrentUser().getUid(); 
    } 

}

這裏片段代碼：

package com.google.firebase.quickstart.database.fragment; 

import android.os.Bundle; 
import android.support.v4.app.Fragment; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 
import android.util.Log; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Toast; 
import com.google.android.gms.ads.AdListener; 
import com.google.android.gms.ads.AdRequest; 
import com.google.android.gms.ads.AdSize; 
import com.google.android.gms.ads.NativeExpressAdView; 
import com.google.firebase.auth.FirebaseAuth; 
import com.google.firebase.database.DataSnapshot; 
import com.google.firebase.database.DatabaseError; 
import com.google.firebase.database.DatabaseReference; 
import com.google.firebase.database.FirebaseDatabase; 
import com.google.firebase.database.Query; 
import com.google.firebase.database.ValueEventListener; 
import com.google.firebase.quickstart.database.R; 
import com.google.firebase.quickstart.database.RVAdapter; 
import com.google.firebase.quickstart.database.models.Post; 
import java.util.ArrayList; 
import java.util.List; 

public abstract class PostListFragment extends Fragment { 

    private DatabaseReference mDatabase; 

    private RVAdapter mAdapter; 
    private RecyclerView mRecycler; 
    private LinearLayoutManager mManager; 

    public static final int ITEMS_PER_AD = 8; 
    private static final int NATIVE_EXPRESS_AD_HEIGHT = 150; 
    private static final int NATIVE_EXPRESS_AD_WIDTH = 320; 
    private static final String AD_UNIT_ID = "ca-app-pub-7651927944958903/3704936407"; 

    private List<Object> mPosts; 

    public PostListFragment() {} 

    @Override 
    public View onCreateView (LayoutInflater inflater, ViewGroup container, 
           Bundle savedInstanceState) { 
     super.onCreateView(inflater, container, savedInstanceState); 
     View rootView = inflater.inflate(R.layout.fragment_all_posts, container, false); 

     mDatabase = FirebaseDatabase.getInstance().getReference(); 

     mRecycler = (RecyclerView) rootView.findViewById(R.id.messages_list); 
     mRecycler.setHasFixedSize(true); 

     return rootView; 
    } 

    @Override 
    public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

     // Set up Layout Manager, reverse layout 
     mManager = new LinearLayoutManager(getActivity()); 
     mManager.setReverseLayout(true); 
     mManager.setStackFromEnd(true); 
     mRecycler.setLayoutManager(mManager); 


     Query postsQuery = getQuery(mDatabase); 

     mPosts = getPosts(postsQuery); 

//  mPosts = new ArrayList<>(); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 
//  mPosts.add(new Post("key" , "uid" , "author" , "title" , "body")); 


     addNativeExpressAds(); 
     setUpAndLoadNativeExpressAds(); 

     mAdapter = new RVAdapter(getActivity() ,mPosts , mDatabase); 

     //this toast always gets 0 posts or 1 ad 
     Toast.makeText(getActivity(), mPosts.size()+"", Toast.LENGTH_SHORT).show(); 

     mRecycler.setAdapter(mAdapter); 

    } 


    public String getUid() { 
     return FirebaseAuth.getInstance().getCurrentUser().getUid(); 
    } 

    public abstract Query getQuery(DatabaseReference databaseReference); 

    public List<Object> getPosts(Query query){ 
     final List<Object> items = new ArrayList<>(); 
     query.getRef().addListenerForSingleValueEvent(new ValueEventListener() { 
      @Override 
      public void onDataChange(DataSnapshot dataSnapshot) { 
       for (DataSnapshot postSnapshot: dataSnapshot.getChildren()) { 
        Post post = postSnapshot.getValue(Post.class); 
        items.add(post); 
       } 
      } 
      @Override 
      public void onCancelled(DatabaseError error) { 
       // Failed to read value 
       Toast.makeText(getActivity(), "Failed to load posts!", Toast.LENGTH_SHORT).show(); 
      } 
     }); 
     return items; 
    } 

    private void addNativeExpressAds() { 

     // Loop through the items array and place a new Native Express ad in every ith position in 
     // the items List. 
     for (int i = 0; i <= mPosts.size(); i += ITEMS_PER_AD) { 
      final NativeExpressAdView adView = new NativeExpressAdView(getActivity()); 
      mPosts.add(i, adView); 

     } 
    } 

    private void setUpAndLoadNativeExpressAds() { 
     // Use a Runnable to ensure that the RecyclerView has been laid out before setting the 
     // ad size for the Native Express ad. This allows us to set the Native Express ad's 
     // width to match the full width of the RecyclerView. 
     mRecycler.post(new Runnable() { 
      @Override 
      public void run() { 
//    final float density = getActivity().getResources().getDisplayMetrics().density; 
       // Set the ad size and ad unit ID for each Native Express ad in the items list. 
       for (int i = 0; i <= mPosts.size(); i += ITEMS_PER_AD) { 
        final NativeExpressAdView adView = (NativeExpressAdView) mPosts.get(i); 
        AdSize adSize = new AdSize(NATIVE_EXPRESS_AD_WIDTH, NATIVE_EXPRESS_AD_HEIGHT); 
        adView.setAdSize(adSize); 
        adView.setAdUnitId(AD_UNIT_ID); 
       } 

       // Load the first Native Express ad in the items list. 
       loadNativeExpressAd(ITEMS_PER_AD); 
      } 
     }); 
    } 

    private void loadNativeExpressAd(final int index) { 

     if (index >= mPosts.size()) { 
      return; 
     } 

     Object item = mPosts.get(index); 
     if (!(item instanceof NativeExpressAdView)) { 
      throw new ClassCastException("Expected item at index " + index + " to be a Native" 
        + " Express ad."); 
     } 

     final NativeExpressAdView adView = (NativeExpressAdView) item; 

     // Set an AdListener on the NativeExpressAdView to wait for the previous Native Express ad 
     // to finish loading before loading the next ad in the items list. 
     adView.setAdListener(new AdListener() { 
      @Override 
      public void onAdLoaded() { 
       super.onAdLoaded(); 
       // The previous Native Express ad loaded successfully, call this method again to 
       // load the next ad in the items list. 
       loadNativeExpressAd(index + ITEMS_PER_AD); 
      } 

      @Override 
      public void onAdFailedToLoad(int errorCode) { 
       // The previous Native Express ad failed to load. Call this method again to load 
       // the next ad in the items list. 
       Log.e("MainActivity", "The previous Native Express ad failed to load. Attempting to" 
         + " load the next Native Express ad in the items list."); 
       loadNativeExpressAd(index + ITEMS_PER_AD); 
      } 
     }); 

     // Load the Native Express ad. 
     adView.loadAd(new AdRequest.Builder().build()); 
    } 
}

這裏是堆棧跡：

11-21 14：51：47.182 21965-21965/com.google.firebase.quickstart.database W/dalvikvm：線程ID = 1：螺紋與未捕獲的異常退出（group = 0x417f89a8） 11-21 14：51：47.182 21965-21965/com.google.firebase.quickstart.database W/dalvikvm：threadid = 1：發生未捕獲異常 11-21 14：51：47.182 21965-21965 /com.google.firebase.quickstart.database W/System.err：java.lang.ClassCastException：com.google.firebase.quickstart.database.models.Post無法轉換爲com.google.android.gms.ads.NativeExpressAdView 11-21 14：51：47.186 21965-21965/com.google。 firebase.quickstart.database W/System.err：com.google.firebase.quickstart.database.RVAdapter.configureAd（RVAdapter.java:83） 11-21 14：51：47.186 21965-21965/com.google.firebase .quickstart.database W/System.err：com.google.firebase.quickstart.database.RVAdapter.onBindViewHolder（RVAdapter.java:77） 11-21 14：51：47.187 21965-21965/com.google.firebase。 quickstart.database W/System.err：at android.support.v7.widget.RecyclerView $ Adapter.onBindViewHolder（RecyclerView.java:5825） 11-21 14：51：47.187 21965-21965/com.google.firebase.quickstart .database W/System.err：at android.support.v7.widget.RecyclerView $ Adapter.bindViewHolder（RecyclerView.java:5858） 11-21 14：51：47.187 21965-21965/com.google.firebase.quickstart。數據庫W/System.err：在android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:5094） 11-21 14：51：47.187 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4970） 11-21 14 ：51：47.187 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.support.v7.widget.LinearLayoutManager $ LayoutState.next（LinearLayoutManager.java:2029） 11-21 14： 51：47.188 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.support.v7.widget.LinearLayoutManager.layoutChunk（LinearLayoutManager.java:1414） 11-21 14：51：47.188 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1377） 11-21 14：51：47.188 21965-21965 /com.google.firebase.quickstart.database W/System.err：位於android.support.v7.widget.LinearLayoutManager.scrollBy（LinearLayoutManager。java：1193） 11-21 14：51：47.188 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy（LinearLayoutManager.java:1043 ） 11-21 14：51：47.189 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.support.v7.widget.RecyclerView $ ViewFlinger.run（RecyclerView.java:4413） 11-21 14：51：47.189 21965-21965/com.google.firebase.quickstart.database W/System.err的：在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:776） 11-21 14 ：51：47.189 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.view.Choreographer.doCallbacks（Choreographer.java:579） 11-21 14：51：47.189 21965-21965 /com.google.firebase.quickstart.database W/System.err：at android.view.Choreographer.doFrame（Choreographer.java:547） 11-21 14：51：47.189 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:762） 11-21 14 ：51：47.189 21965-21965/com.google.firebase.quickstart.database W/System.err：at android.os.Handler.handleCallback（Handler.java:800） 11-21 14：51：47.190 21965-21965 /com.google.firebase.quickstart.database W/System.err：at android.os.Handler.dispatchMessage（Handler.java:100） 11-21 14：51：47.190 21965-21965/com.google.firebase。 quickstart.database W/System.err：at android.os.Looper.loop（Looper.java:194） 11-21 14：51：47.190 21965-21965/com.google.firebase.quickstart.database W/System。 err：at android.app.ActivityThread.main（ActivityThread.java:5391） 11-21 14：51：47.191 21965-21965/com.google.firebase.quickstart.database W/System.err：at java.la ng.reflect.Method.invokeNative（Native Method） 11-21 14：51：47.191 21965-21965/com.google.firebase.quickstart.database W/System.err：at java.lang.reflect.Method.invoke（ Method.java:525） 11-21 14：51：47.191 21965-21965/com.google.firebase.quickstart.database W/System.err的：在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit .java：833） 11-21 14：51：47.191 21965-21965/com.google.firebase.quickstart.database W/System.err：at com.android.internal.os.ZygoteInit.main（ZygoteInit.java： 600） 11-21 14：51：47.192 21965-21965/com.google.firebase.quickstart.database W/System.err的：在dalvik.system.NativeStart.main（本機方法） 11-21 14時51分： 47.192 21965-21965/com.google.firebase.quickstart.database W/dalvikvm：threadid = 1：調用UncaughtExceptionHandler 11-21 14：51：47.196 21965-21965/com.google。 firebase.quickstart.database E/AndroidRuntime：致命異常：主要 java.lang.ClassCastException：com.google.firebase.quickstart.database.models.Post不能轉換到com.google.android.gms.ads.NativeExpressAdView 在com.google.firebase.quickstart.database.RVAdapter.configureAd（RVAdapter.java:83）在com.google.firebase.quickstart.database.RVAdapter.onBindViewHolder（RVAdapter.java:77）在android.support.v7。 widget.RecyclerView $ Adapter.onBindViewHolder（RecyclerView.java:5825） at android.support.v7.widget.RecyclerView $ Adapter.bindViewHolder（RecyclerView.java:5858） at android.support.v7.widget.RecyclerView $ Recycler。 getViewForPosition（RecyclerView.java:5094） at android.support.v7.widget.RecyclerView $ Recycler.getViewForPosition（RecyclerView.java:4970） at android.support.v7.widget.LinearLayoutManager $ LayoutState.next（LinearLayoutManager.java:2029） at android.support。在android.support.v7.widget.LinearLayoutManager.scrollBy（LinearLayoutManager。）上的android.support.v7.widget.LinearLayoutManager.fill（LinearLayoutManager.java:1377）上的v7.widget.LinearLayoutManager.layoutChunk（LinearLayoutManager.java:1414）。 Java的：1193）在android.support.v7.widget.LinearLayoutManager.scrollVerticallyBy（LinearLayoutManager.java:1043）在android.support.v7.widget.RecyclerView $ ViewFlinger。運行（RecyclerView.java:4413） at android.view.Choreographer $ CallbackRecord.run（Choreographer.java:776） at android.view.Choreographer.doCallbacks（Choreographer.java:579） at android.view.Choreographer。在android.os.Handler上的android.os.Handler.handleCallback（Handler.java:800）上的doFrame（Choreographer.java:547） $ FrameDisplayEventReceiver.run（Choreographer.java:762）。 dispatchMessage（Handler.java:100） at android.os.Looper.loop（Looper.java:194） at android.app.ActivityThread.main（ActivityThread.java:5391）在java.lang.reflect.Method.invokeNative（Native Method） at java.lang.reflect.Method.invoke（Method.java:525） at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run（ZygoteInit。 Java的：833）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:600）在dalvik.system.NativeStart.main（本機方法）

來源

2016-11-21 kerollos

我去的其他方式，並加入廣告「onDataChange」（解決方法就是在科特林）：

Ref.addListenerForSingleValueEvent(object : ValueEventListener { 
      override fun onCancelled(p0: DatabaseError?) { 
       Log.v(TAG, "empty") 
      } 

      override fun onDataChange(p0: DataSnapshot) { 
       val items = p0.childrenCount.toInt() 
       var i = 0 
       for (ds in p0.children) { 
        if (position % ITEMS_PER_AD == 0) { 
         val adView = NativeExpressAdView(activity) 
         val scale = activity.resources.displayMetrics.density 
         val adSize = AdSize((activity.resources.displayMetrics.widthPixels/scale).toInt(), NATIVE_EXPRESS_AD_HEIGHT) 
         adView.adSize = adSize 
         adView.adUnitId = "my unit id..." 
         adView.loadAd(AdRequest.Builder().build()) 
         list.add(position, adView) 
         position += 1 
        } 
        val model = ds.getValue(someModel::class.java) 
        list.add(position, model!!) 
        i += 1 
        position += 1 
        if (i == items) { 
         val adapter = RecyclerViewAdapter(activity, list) 
         mRecycler.adapter = adapter 
        } 
       } 
      } 
     })

這是我的適配器：

class RecyclerViewAdapter(private val mContext: Context, private val mRecyclerViewItems: List<Any>) : RecyclerView.Adapter<RecyclerView.ViewHolder>() { 
    inner class MenuItemViewHolder internal constructor(view: View) : RecyclerView.ViewHolder(view) { 
     val menuItemName: TextView 

     init { 
      menuItemName = view.findViewById(R.id.menu_item_name) as TextView 
     } 
    } 

    inner class NativeExpressAdViewHolder internal constructor(view: View) : RecyclerView.ViewHolder(view) 

    override fun getItemCount(): Int { 
     return mRecyclerViewItems.size 
    } 

    override fun getItemViewType(position: Int): Int { 
     return if (position % ITEMS_PER_AD == 0) 
      NATIVE_EXPRESS_AD_VIEW_TYPE 
     else 
      MENU_ITEM_VIEW_TYPE 
    } 

    override fun onCreateViewHolder(viewGroup: ViewGroup, viewType: Int): RecyclerView.ViewHolder { 
     when (viewType) { 
      MENU_ITEM_VIEW_TYPE -> { 
       val menuItemLayoutView = LayoutInflater.from(viewGroup.context).inflate(
         R.layout.menu_item_container, viewGroup, false) 
       return MenuItemViewHolder(menuItemLayoutView) 
      } 
      else -> { 
       val nativeExpressLayoutView = LayoutInflater.from(
         viewGroup.context).inflate(R.layout.native_express_ad_container, 
         viewGroup, false) 
       return NativeExpressAdViewHolder(nativeExpressLayoutView) 
      } 
     } 

    } 

    override fun onBindViewHolder(holder: RecyclerView.ViewHolder, position: Int) { 
     val viewType = getItemViewType(position) 
     when (viewType) { 
      MENU_ITEM_VIEW_TYPE -> { 
       val menuItemHolder = holder as MenuItemViewHolder 
       val menuItem = mRecyclerViewItems[position] as modelWOD 
       menuItemHolder.menuItemName.text = menuItem.name 
      } 
      else -> { 
       val nativeExpressHolder = holder as NativeExpressAdViewHolder 
       val adView = mRecyclerViewItems[position] as NativeExpressAdView 
       val adCardView = nativeExpressHolder.itemView as ViewGroup 
       if (adCardView.childCount > 0) adCardView.removeAllViews() 
       if (adView.parent != null) (adView.parent as ViewGroup).removeView(adView) 
       adCardView.addView(adView) 
      } 
     } 
    } 

    companion object { 
     private val MENU_ITEM_VIEW_TYPE = 0 
     private val NATIVE_EXPRESS_AD_VIEW_TYPE = 1 
     private val ITEMS_PER_AD = 8 
    } 
}

來源

2017-07-02 09:34:14 Dmitriy

與火力地堡查詢實施火力地堡本土快遞廣告

回答

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