Wie NativeAdExpressView RecyclerView und Volley zusammen implementieren?

Question

Ich arbeite an einer Android-App, die Daten von JSON Url abrufen und in Recyclerview anzeigen. Ich möchte native Anzeigen zwischen Elementen hinzufügen, also füge ich NativeExpressAdView in Recyclerview hinzu, indem ich diesem Tutorial Git Hub Tutorial folge. ich Störung erhalte auf onBindViewHolder()

Fehler, die ich bekommen habe ist

ava.lang.ClassCastException: com.sctar.moviestime.myRecycler.GetDataAdapter nicht com.google.android.gms gegossen werden kann. ads.NativeExpressAdView bei com.sctar.moviestime.myRecycler.MyAdapter.onBindViewHolder (MyAdapter.java:119

MyAdapter.java

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

Context mContext; 
private List<Object> mRecyclerViewItems; 
private static final int MOVIE_ITEM_VIEW_TYPE=0; 
private static final int SCROLL_AD_VIEW=1; 
public MyAdapter(Context context,List<Object> mRecyclerViewItems) 
{ 
    super(); 
    this.mContext=context; 
    this.mRecyclerViewItems=mRecyclerViewItems; 
} 

public class MoviesItemViewHolder extends RecyclerView.ViewHolder { 
    public TextView movieNameTV,movieGenreTV; 
    public YouTubeThumbnailView videoThumbnail; 
    public String movie_url=""; 

    public MoviesItemViewHolder(View mView) { 
     super(mView); 
     movieNameTV=(TextView)mView.findViewById(R.id.movieNameTV); 
     movieGenreTV=(TextView)mView.findViewById(R.id.movieGenre); 
     videoThumbnail=(YouTubeThumbnailView)mView.findViewById(R.id.thumbnailView1); 
     videoThumbnail.initialize(DeveloperKey.DEV_KEY, new YouTubeThumbnailView.OnInitializedListener() { 
      @Override 
      public void onInitializationSuccess(YouTubeThumbnailView youTubeThumbnailView, final YouTubeThumbnailLoader youTubeThumbnailLoader) { 

       youTubeThumbnailLoader.setVideo(movie_url); 
       youTubeThumbnailLoader.setOnThumbnailLoadedListener(new YouTubeThumbnailLoader.OnThumbnailLoadedListener() { 
        @Override 
        public void onThumbnailLoaded(YouTubeThumbnailView youTubeThumbnailView, String s) { 
         youTubeThumbnailLoader.release(); 
        } 
        @Override 
        public void onThumbnailError(YouTubeThumbnailView youTubeThumbnailView, YouTubeThumbnailLoader.ErrorReason errorReason) { 

        } 
       }); 
      } 

      @Override 
      public void onInitializationFailure(YouTubeThumbnailView youTubeThumbnailView, YouTubeInitializationResult youTubeInitializationResult) { 

      } 
     }); 
    } 
} 
public class NativeExpressViewHolder extends RecyclerView.ViewHolder 
{ 
    public NativeExpressViewHolder(View itemView) { 
     super(itemView); 
    } 
} 

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

@Override 
public int getItemViewType(int position) { 
    return (position%HomeFragment.ITEMS_PER_AD==0)?SCROLL_AD_VIEW:MOVIE_ITEM_VIEW_TYPE; 
} 

@Override 
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
    switch (viewType) { 
     case SCROLL_AD_VIEW: 
      View scroll_ad_layout=LayoutInflater.from(parent.getContext()).inflate(R.layout.scroll_ad_layout,parent,false); 
      return new NativeExpressViewHolder(scroll_ad_layout); 
     case MOVIE_ITEM_VIEW_TYPE: 
      //Fall through 
     default: 
      View movie_item_view = LayoutInflater.from(parent.getContext()).inflate(R.layout.movie_card, parent, false); 
      return new MoviesItemViewHolder(movie_item_view); 
    } 
} 
@Override 
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 

    int viewType = getItemViewType(position); 

    switch (viewType) { 
     case SCROLL_AD_VIEW: 
       NativeExpressViewHolder nativeExpressViewHolder = (NativeExpressViewHolder) holder; 
       NativeExpressAdView nativeExpressAdView= (NativeExpressAdView) mRecyclerViewItems.get(position); 
       ViewGroup adCardView = (ViewGroup) nativeExpressViewHolder.itemView; 
       adCardView.removeAllViews(); 
      if (adCardView.getChildCount() > 0) { 
       adCardView.removeAllViews(); 
      } 
      if (nativeExpressAdView.getParent() != null) { 
       ((ViewGroup) nativeExpressAdView.getParent()).removeView(nativeExpressAdView); 
      } 
      adCardView.addView(nativeExpressAdView); 
      break; 
     case MOVIE_ITEM_VIEW_TYPE: 
      //Fall Through 
      default: 
      MoviesItemViewHolder moviesItemViewHolder = (MoviesItemViewHolder) holder; 
      GetDataAdapter cardItem = (GetDataAdapter) mRecyclerViewItems.get(position); 
      moviesItemViewHolder.movieNameTV.setText(cardItem.getName()); 
      moviesItemViewHolder.movieGenreTV.setText(cardItem.getGenre()); 
      moviesItemViewHolder.movie_url = cardItem.getMovie_url(); 
      break; 
    } 
} 

}

HomeFragment.java Klasse

public class HomeFragment extends Fragment { 

YouTubePlayerSupportFragment youTubePlayerFragment; 
RecyclerView recyclerView; 
String GET_JSON_DATA_URL="http://sctar.com/moviestime/admin/getMovie.php?page="; 
String JSON_NAME="movie_name"; 
String JSON_GENRE="movie_genre"; 
String JSON_URL="movie_url"; 
JsonArrayRequest jsonArrayRequest; 
RequestQueue requestQueue; 
TextView movieName,play_movieName; 
EqualizerView equalizerView; 
ProgressBar progressBar; 
private int pageNumber=1; 
GetDataAdapter cardItem; 
private List<Object> mRecyclerViewItems; 
    public static final int ITEMS_PER_AD=8; 
    private static final int NATIVE_EXPRESS_AD_HEIGHT=150; 
    private static final String AD_UNIT_ID="ca-app-pub-1094536469217749/8160042117"; 
@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 

    View view=inflater.inflate(R.layout.home_fragment,container,false); 
    setRetainInstance(true); 


    recyclerView=(RecyclerView)view.findViewById(R.id.homeRV); 
    recyclerView.setHasFixedSize(true); 

    movieName=(TextView)view.findViewById(R.id.movieNameTV); 
    play_movieName=(TextView)view.findViewById(R.id.play_movieNameTV); 

    //Specify a Layout Manager 
    RecyclerView.LayoutManager linearLayoutManager=new LinearLayoutManager(this.getActivity()); 
    recyclerView.setLayoutManager(linearLayoutManager); 

    mRecyclerViewItems=new ArrayList<>(); 

    progressBar=(ProgressBar)view.findViewById(R.id.progressBar); 
    equalizerView=(EqualizerView)view.findViewById(R.id.equalizer_view); 
    //Update RecyclerView Items 
    //addData(); 

    youTubePlayerFragment=YouTubePlayerSupportFragment.newInstance(); 
    FragmentTransaction fragmentTransaction=getChildFragmentManager().beginTransaction(); 
    fragmentTransaction.add(R.id.youtube_fragment,youTubePlayerFragment).commit(); 

    ItemClickSupport.addTo(recyclerView).setOnItemClickListener(new ItemClickSupport.OnItemClickListener() { 
     @Override 
     public void onItemClicked(RecyclerView recyclerView, final int position, View v) { 


      youTubePlayerFragment.initialize(DeveloperKey.DEV_KEY, new YouTubePlayer.OnInitializedListener() { 
       @Override 
       public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer yPlayer, boolean b) { 
        if(!b) 
        { 
         cardItem=(GetDataAdapter)mRecyclerViewItems.get(position); 
         String movie_url=cardItem.getMovie_url(); 
         yPlayer.setPlayerStyle(YouTubePlayer.PlayerStyle.DEFAULT); 
         yPlayer.setFullscreenControlFlags(YouTubePlayer.FULLSCREEN_FLAG_CONTROL_ORIENTATION); 
         //yPlayer.setFullscreenControlFlags(YouTubePlayer.FULLSCREEN_FLAG_ALWAYS_FULLSCREEN_IN_LANDSCAPE); 
         yPlayer.loadVideo(movie_url); 
         yPlayer.play(); 
         equalizerView.animateBars(); 
        } 
       } 
       @Override 
       public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) { 

       } 

      }); 
      youTubePlayerFragment.onDestroy(); 
       } 
      }); 

      //Get Data from the Server 
    addData(); 

    if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.M) { 
     recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() { 
      @Override 
      public void onScrolled(RecyclerView recyclerView, int dx, int dy) { 
       super.onScrolled(recyclerView, dx, dy); 
       if(isLastItemDisplaying(recyclerView)) { 
        addData(); 
       } 
      } 
     }); 
    } 
    else { 
     recyclerView.setOnScrollChangeListener(new View.OnScrollChangeListener() { 
      @Override 
      public void onScrollChange(View view, int i, int i1, int i2, int i3) { 
       if(isLastItemDisplaying(recyclerView)) 
        addData(); 
      } 
     }); 
    } 

// addData(); 

    //Load Native and Banner Ads 
    addNativeScrollAds(); 
    setupAndLoadNativeAds(); 
    addBannerAds(view); 

    return view; 
} 
    public void addData() 
    { 
     progressBar.setVisibility(View.VISIBLE); 
     requestQueue=Volley.newRequestQueue(this.getActivity()); 
     requestQueue.add(json_web_call(pageNumber)); 
     pageNumber++; 
    } 


    private void addNativeScrollAds(){ 
     Toast.makeText(getActivity(),String.valueOf(mRecyclerViewItems.size()), Toast.LENGTH_SHORT).show(); 
     for(int i=0;i<mRecyclerViewItems.size();i+=ITEMS_PER_AD){ 
      NativeExpressAdView adView=new NativeExpressAdView(this.getActivity()); 
      adView.setAdSize(new AdSize(320,150)); 
      adView.setAdUnitId(AD_UNIT_ID); 
      adView.loadAd(new AdRequest.Builder().build()); 
      mRecyclerViewItems.add(i,adView); 
     } 
    } 
public void setupAndLoadNativeAds(){ 
      recyclerView.post(new Runnable() { 
       @Override 
       public void run() { 
Toast.LENGTH_SHORT).show(); 
        final float scale=getContext().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 <mRecyclerViewItems.size(); i += ITEMS_PER_AD) { 
          final NativeExpressAdView adView = (NativeExpressAdView) mRecyclerViewItems.get(i); 
          CardView cardView=(CardView)getActivity().findViewById(R.id.scrollAdCard); 
          final int adWidth = cardView.getWidth() - cardView.getPaddingLeft() 
            - cardView.getPaddingRight(); 
          AdSize adSize = new AdSize((int) (adWidth/scale), NATIVE_EXPRESS_AD_HEIGHT); 
          adView.setAdSize(adSize); 
          adView.setAdUnitId(AD_UNIT_ID); 
        } 
        // Load the first Native Express ad in the items list. 
        loadNativeExpressAd(8); 
       } 
      }); 
     } 

    private void loadNativeExpressAd(final int index){ 

     if(index>=mRecyclerViewItems.size()){ 
      return; 
     } 
     Object item=mRecyclerViewItems.get(index); 
     if(!(item instanceof NativeExpressAdView)){ 
      throw new ClassCastException("Expected Item at Index "+index+" to be a Native Express Adview"); 
     } 
     final NativeExpressAdView adView=(NativeExpressAdView)item; 
     adView.setAdListener(new AdListener() { 
      @Override 
      public void onAdLoaded() { 
       super.onAdLoaded(); 
        loadNativeExpressAd(index+ITEMS_PER_AD); 
      } 

      @Override 
      public void onAdFailedToLoad(int errorCode) { 
       super.onAdFailedToLoad(errorCode); 
       Log.e("HomeFragment","The Previous native ad failed to load, attempting to load next ad in item list"); 
       loadNativeExpressAd(index+ITEMS_PER_AD); 
      } 
     }); 
     adView.loadAd(new AdRequest.Builder().build()); 
    // Toast.makeText(getActivity(),String.valueOf(mRecyclerViewItems.size()), Toast.LENGTH_SHORT).show(); 
    } 
    public void addBannerAds(View view){ 
     AdView bannerAdView=(AdView)view.findViewById(R.id.bannerAdview1); 
     AdRequest bannerAdRequest=new AdRequest.Builder().addTestDevice("cph1701-a17bc212").build(); 
     bannerAdView.loadAd(bannerAdRequest); 
    } 
public JsonArrayRequest json_web_call(int pageNumber) 
{ 
    progressBar.setVisibility(View.VISIBLE); 
    jsonArrayRequest=new JsonArrayRequest(GET_JSON_DATA_URL+String.valueOf(pageNumber), new Response.Listener<JSONArray>() { 
    //jsonArrayRequest=new JsonArrayRequest(GET_JSON_DATA_URL, new Response.Listener<JSONArray>() { 
     @Override 
     public void onResponse(JSONArray response) { 
      json_parse_data(response); 
      progressBar.setVisibility(View.GONE); 
     } 

    }, new Response.ErrorListener() { 
     @Override 
     public void onErrorResponse(VolleyError error) { 
     progressBar.setVisibility(View.GONE); 

     } 
    }); 
    return jsonArrayRequest; 
    //requestQueue=Volley.newRequestQueue(this.getActivity()); 
    //requestQueue.add(jsonArrayRequest); 

} 

public void json_parse_data(JSONArray array) 
{ 
    for(int i=0;i<array.length();i++) 
    { 
     try { 
       JSONObject json=array.getJSONObject(i); 
       String name=json.getString(JSON_NAME); 
       String genre=json.getString(JSON_GENRE); 
       String movie_url=json.getString(JSON_URL); 
       GetDataAdapter menuItem=new GetDataAdapter(name,genre,movie_url); 
       //if(i%ITEMS_PER_AD!=0) 
       mRecyclerViewItems.add(menuItem); 
     } 
     catch (JSONException e) 
     { 
      e.printStackTrace(); 
     } 

    } 
    MyAdapter myAdapter=new MyAdapter(this.getContext(),mRecyclerViewItems); 
    recyclerView.setAdapter(myAdapter); 
} 
    private boolean isLastItemDisplaying(RecyclerView recyclerView) { 
     if(recyclerView.getAdapter().getItemCount()!=0){ 
      int lastVisibleItem=((LinearLayoutManager)recyclerView.getLayoutManager()).findLastCompletelyVisibleItemPosition(); 
      if(lastVisibleItem!=RecyclerView.NO_POSITION && lastVisibleItem==recyclerView.getAdapter().getItemCount()-1) 
       return true; 
     } 
     return false; 
    } 

}

GetDataAdapter Klasse

public class GetDataAdapter { 
int id; 
String name; 
String genre; 
String movie_url; 
public GetDataAdapter(){ 
    //Default Constructor 
} 
public GetDataAdapter(String name,String genre,String movie_url){ 
    this.name=name; 
    this.genre=genre; 
    this.movie_url=movie_url; 
} 
public int getId() { 
    return id; 
} 

public void setId(int id) { 
    this.id = id; 
} 

public String getName() { 
    return name; 
} 

public void setName(String name) { 
    this.name = name; 
} 

public String getGenre() { 
    return genre; 
} 

public void setGenre(String genre) { 
    this.genre = genre; 
} 

public String getMovie_url() { 
    return movie_url; 
} 

public void setMovie_url(String movie_url) { 
    this.movie_url = movie_url; 
} 

}

Answer 1

Das erste Problem ist das Fehlen eines = Zeichen in der addNativeScrollAds Methode sein sollte HomeFragment Klasse, in der für Zyklus.

Sie sollten es so hinzufügen (lesen Sie den Inline-Kommentar):

for (int i=0; i<=/*i added equals here*/mRecyclerViewItems.size(); i+=ITEMS_PER_AD){ 
    NativeExpressAdView adView = new NativeExpressAdView(this.getActivity()); 
    adView.setAdSize(new AdSize(320,150)); 
    adView.setAdUnitId(AD_UNIT_ID); 
    adView.loadAd(new AdRequest.Builder().build()); 
    mRecyclerViewItems.add(i,adView); 
} 

Das zweite Problem in der setupAndLoadNativeAds Methode sein sollte, in dem die für den Zyklus der = in der exakt gleichen Stelle fehlt.

Lassen Sie mich wissen, ob dies das Problem löst