Java Android RecyclerAdapter中的ClassCastException
我很难理解为什么我在我的RecyclerAdapter课程中遇到ClassCastException。我将其设置为接受两种不同类型的视图，一种用于常规提要项目，另一种用于本地广告。出什么事了 在我的主要活动中，我调用构造函数如下：Java Android RecyclerAdapter中的ClassCastException,java,android,classcastexception,android-recyclerview,Java,Android,Classcastexception,Android Recyclerview,我很难理解为什么我在我的RecyclerAdapter课程中遇到ClassCastException。我将其设置为接受两种不同类型的视图，一种用于常规提要项目，另一种用于本地广告。出什么事了 在我的主要活动中，我调用构造函数如下： feedItems = new ArrayList<>(); List<Feed> adItems = new ArrayList<>(); recyclerView = (RecyclerView) findViewById(R.
feedItems = new ArrayList<>();
List<Feed> adItems = new ArrayList<>();
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
marketFeedRecyclerAdapter = new MarketFeedRecyclerAdapter(this, feedItems, new ImageLoader(new FeedItemFileCache(this)), adItems);
bindAdItemView((AdViewHolder) viewHolder);
public class MarketFeedRecyclerAdapter extends LoadingRowRecyclerAdapter {
private static final int VIEW_TYPE_MARKET_FEED = 0;
private static final int VIEW_TYPE_AD = 1;
private final Context context;
private final List<Feed> feedItems;
private final ImageLoader feedItemImageLoader;
private FeedItemClickListener feedItemClickListener;
private boolean isLongPressed = false;
public MarketFeedRecyclerAdapter(Context context, List<Feed> feedItems, ImageLoader feedItemImageLoader, List<Feed> adItems) {
this.context = context;
this.feedItems = feedItems;
this.feedItemImageLoader = feedItemImageLoader;
this.feedItems.addAll(adItems);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case VIEW_TYPE_MARKET_FEED:
return new MarketFeedViewHolder(new FeedItemView(context));
case VIEW_TYPE_AD:
return new AdViewHolder(new MarketFeedAdItemView(context));
}
return super.onCreateViewHolder(parent, viewType);
}
// Differentiate between feedItem views and nativeAds
@Override
public int getViewType(int position) {
int viewType = VIEW_TYPE_MARKET_FEED;
if ((position % 25 == 0)) {
viewType = VIEW_TYPE_AD;
}
return viewType;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
if (getViewType(position) == VIEW_TYPE_MARKET_FEED) {
bindMarketFeedItemView((MarketFeedViewHolder) viewHolder, position - position / 6);
} else {
bindAdItemView((AdViewHolder) viewHolder);
}
}
// For Ad Objects
private void bindAdItemView(AdViewHolder viewHolder) {
showNativeAd(viewHolder);
}
private void bindMarketFeedItemView(MarketFeedViewHolder viewHolder, int position) {
final FeedItemView feedItemView = viewHolder.feedItemView;
final Feed feedDesign = feedItems.get(position);
// TODO we can probably conditionally show or hide these based on the type of feed item, same as in FeedActivitySingle
feedItemView.showOrHideEditButton(false);
feedItemView.showOrHideBuyButton(true);
feedItemView.showOrHideFlipButton(feedDesign.getDesign().getCompressedBackImage() != null);
feedItemView.showOrHidePriceText(true);
// Set the results into TextViews
feedItemView.setProductPriceText(String.valueOf(feedDesign.getDesign().getPrice()));
feedItemView.setDownloadsText(String.valueOf(feedDesign.getDesign().getDownloadCount()));
feedItemView.setLikesText(String.valueOf(feedDesign.getDesign().getLikesCount()));
feedItemView.setUsernameText(feedDesign.getDesign().getAuthor().getUsername());
feedItemView.setTimestampText(feedDesign.getTimestampText());
feedItemView.getSaveImage().setImageResource(feedDesign.isInPersonalGallery() ? R.drawable.ic_action_saved : R.drawable.ic_not_saved);
feedItemView.getLikeImage().setImageResource(feedDesign.isLiked() ? R.drawable.ic_action_like_feed_full : R.drawable.ic_action_like_feed);
feedItemView.getTrashImage().setVisibility(ParseHelper.isCurrentUser(feedDesign.getDesign().getAuthor().getObjectId()) ? View.VISIBLE : View.GONE);
feedItemView.getFeedSocialShareImage().setVisibility(View.VISIBLE);
switch(feedDesign.getDisplayedSide()) {
case FRONT:
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getCompressedImage().getUrl(), feedItemView.getImage(), feedItemView.getProgressBar());
break;
case BACK:
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getCompressedBackImage().getUrl(), feedItemView.getImage(), feedItemView.getProgressBar());
break;
}
if(feedDesign.getDesign().getAuthor().getProfilePicture() != null) {
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getAuthor().getProfilePicture().getUrl(), feedItemView.getProfilePicture(), null); // TODO should this use profilePictureFileCache?
} else {
viewHolder.feedItemView.getProfilePicture().setImageResource(R.drawable.ic_anonymous);
}
SetCommentViews(feedItemView, feedDesign.getComments());
SetClickListeners(feedItemView, feedDesign, position);
}
@Override
protected int getContentDataSize() {
return feedItems.size();
}
class MarketFeedViewHolder extends RecyclerView.ViewHolder {
FeedItemView feedItemView;
public MarketFeedViewHolder(FeedItemView view) {
super(view);
this.feedItemView = view;
}
}
class AdViewHolder extends RecyclerView.ViewHolder {
MarketFeedAdItemView adItemView;
public AdViewHolder(MarketFeedAdItemView view) {
super(view);
this.adItemView = view;
}
}
private NativeAd nativeAd;
private AdChoicesView adChoicesView;
private void showNativeAd(AdViewHolder viewHolder){
AdSettings.addTestDevice("a6ffb7bec7af13f768f033dbfea042df");
nativeAd = new NativeAd(context, "846223392142435_1025413774223395");
nativeAd.setAdListener(new AdListener() {
@Override
public void onError(Ad ad, AdError adError) {
}
@Override
public void onAdLoaded(Ad ad) {
final MarketFeedAdItemView adItemView = viewHolder.adItemView;
// Setting the Text
adItemView.nativeAdSocialContext.setText(nativeAd.getAdSocialContext());
adItemView.nativeAdCallToAction.setText(nativeAd.getAdCallToAction());
adItemView.nativeAdTitle.setText(nativeAd.getAdTitle());
adItemView.nativeAdBody.setText(nativeAd.getAdBody());
// Downloading and setting the ad icon
NativeAd.Image adIcon = nativeAd.getAdIcon();
NativeAd.downloadAndDisplayImage(adIcon, adItemView.nativeAdIcon);
// Download and setting the cover image
/*NativeAd.Image adCoverImage = nativeAd.getAdCoverImage();*/
adItemView.nativeAdMedia.setNativeAd(nativeAd);
// Add adChoices icon
if (adChoicesView == null) {
adChoicesView = new AdChoicesView(context, nativeAd, true);
adItemView.addView(adChoicesView, 0);
}
nativeAd.registerViewForInteraction(adItemView);
}
@Override
public void onAdClicked(Ad ad) {
}
});
nativeAd.loadAd();
}
}
public abstract class LoadingRowRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final int ROW_VIEW_TYPE_LOADING = 72398; // obscure number
private boolean mContainsLoadingRow;
protected abstract int getContentDataSize();
protected abstract int getViewType(int position);
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case ROW_VIEW_TYPE_LOADING:
return new LoadingViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.loading_row, parent, false));
}
throw new IllegalArgumentException("viewType is not ROW_VIEW_TYPE_LOADING. You must handle all other values of viewType (defined by getViewType) before calling super.");
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
// empty
}
@Override
public final int getItemCount() {
return mContainsLoadingRow ? (getContentDataSize() + 1) : getContentDataSize();
}
@Override
public int getItemViewType(int position) {
return (position == getContentDataSize()) ? ROW_VIEW_TYPE_LOADING : getViewType(position);
}
/**
* Sets a boolean which is used by getItemCount and in turn getItemViewType to determine which view type the row should be (loading view vs. other view).
* Should only be called when there is more results to load in an upcoming api request (determined by calling fragment).
*/
public void toggleLoadingRowOn() {
mContainsLoadingRow = true;
}
/**
* Checks to see if a loading row exists by checking an instance boolean and removes the row / clears the boolean.
* This helps to 'replace' a loading row with a different row.
*/
public void toggleLoadingRowOff() {
if (mContainsLoadingRow) {
mContainsLoadingRow = false;
// removes the loading row explicitly instead of allowing it to be 'pushed' down when new user suggestion rows are added.
// this is only required to maintain consistency with the rest of the app.
int position = getContentDataSize();
if (position >= 0) {
notifyItemRemoved(position);
}
}
}
protected class LoadingViewHolder extends RecyclerView.ViewHolder {
public LoadingViewHolder(View v) {
super(v);
}
}
}
public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener {
private static final int VISIBLE_THRESHOLD = 5; // The minimum amount of items to have below your current scroll position before loading more
private LinearLayoutManager mLinearLayoutManager;
public abstract void onLoadMore();
public EndlessRecyclerOnScrollListener(LinearLayoutManager linearLayoutManager) {
this.mLinearLayoutManager = linearLayoutManager;
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int totalItemCount = mLinearLayoutManager.getItemCount();
int firstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition();
int visibleItemCount = recyclerView.getChildCount();
int lastItemVisible = firstVisibleItem + visibleItemCount;
// once the last visible item is within VISIBLE_THRESHOLD from the bottom, we want to load more
if ((totalItemCount - lastItemVisible) <= VISIBLE_THRESHOLD) {
onLoadMore();
}
}
}
feedItems = new ArrayList<>();
List<Feed> adItems = new ArrayList<>();
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
marketFeedRecyclerAdapter = new MarketFeedRecyclerAdapter(this, feedItems, new ImageLoader(new FeedItemFileCache(this)), adItems);
bindAdItemView((AdViewHolder) viewHolder);
public class MarketFeedRecyclerAdapter extends LoadingRowRecyclerAdapter {
private static final int VIEW_TYPE_MARKET_FEED = 0;
private static final int VIEW_TYPE_AD = 1;
private final Context context;
private final List<Feed> feedItems;
private final ImageLoader feedItemImageLoader;
private FeedItemClickListener feedItemClickListener;
private boolean isLongPressed = false;
public MarketFeedRecyclerAdapter(Context context, List<Feed> feedItems, ImageLoader feedItemImageLoader, List<Feed> adItems) {
this.context = context;
this.feedItems = feedItems;
this.feedItemImageLoader = feedItemImageLoader;
this.feedItems.addAll(adItems);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case VIEW_TYPE_MARKET_FEED:
return new MarketFeedViewHolder(new FeedItemView(context));
case VIEW_TYPE_AD:
return new AdViewHolder(new MarketFeedAdItemView(context));
}
return super.onCreateViewHolder(parent, viewType);
}
// Differentiate between feedItem views and nativeAds
@Override
public int getViewType(int position) {
int viewType = VIEW_TYPE_MARKET_FEED;
if ((position % 25 == 0)) {
viewType = VIEW_TYPE_AD;
}
return viewType;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
if (getViewType(position) == VIEW_TYPE_MARKET_FEED) {
bindMarketFeedItemView((MarketFeedViewHolder) viewHolder, position - position / 6);
} else {
bindAdItemView((AdViewHolder) viewHolder);
}
}
// For Ad Objects
private void bindAdItemView(AdViewHolder viewHolder) {
showNativeAd(viewHolder);
}
private void bindMarketFeedItemView(MarketFeedViewHolder viewHolder, int position) {
final FeedItemView feedItemView = viewHolder.feedItemView;
final Feed feedDesign = feedItems.get(position);
// TODO we can probably conditionally show or hide these based on the type of feed item, same as in FeedActivitySingle
feedItemView.showOrHideEditButton(false);
feedItemView.showOrHideBuyButton(true);
feedItemView.showOrHideFlipButton(feedDesign.getDesign().getCompressedBackImage() != null);
feedItemView.showOrHidePriceText(true);
// Set the results into TextViews
feedItemView.setProductPriceText(String.valueOf(feedDesign.getDesign().getPrice()));
feedItemView.setDownloadsText(String.valueOf(feedDesign.getDesign().getDownloadCount()));
feedItemView.setLikesText(String.valueOf(feedDesign.getDesign().getLikesCount()));
feedItemView.setUsernameText(feedDesign.getDesign().getAuthor().getUsername());
feedItemView.setTimestampText(feedDesign.getTimestampText());
feedItemView.getSaveImage().setImageResource(feedDesign.isInPersonalGallery() ? R.drawable.ic_action_saved : R.drawable.ic_not_saved);
feedItemView.getLikeImage().setImageResource(feedDesign.isLiked() ? R.drawable.ic_action_like_feed_full : R.drawable.ic_action_like_feed);
feedItemView.getTrashImage().setVisibility(ParseHelper.isCurrentUser(feedDesign.getDesign().getAuthor().getObjectId()) ? View.VISIBLE : View.GONE);
feedItemView.getFeedSocialShareImage().setVisibility(View.VISIBLE);
switch(feedDesign.getDisplayedSide()) {
case FRONT:
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getCompressedImage().getUrl(), feedItemView.getImage(), feedItemView.getProgressBar());
break;
case BACK:
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getCompressedBackImage().getUrl(), feedItemView.getImage(), feedItemView.getProgressBar());
break;
}
if(feedDesign.getDesign().getAuthor().getProfilePicture() != null) {
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getAuthor().getProfilePicture().getUrl(), feedItemView.getProfilePicture(), null); // TODO should this use profilePictureFileCache?
} else {
viewHolder.feedItemView.getProfilePicture().setImageResource(R.drawable.ic_anonymous);
}
SetCommentViews(feedItemView, feedDesign.getComments());
SetClickListeners(feedItemView, feedDesign, position);
}
@Override
protected int getContentDataSize() {
return feedItems.size();
}
class MarketFeedViewHolder extends RecyclerView.ViewHolder {
FeedItemView feedItemView;
public MarketFeedViewHolder(FeedItemView view) {
super(view);
this.feedItemView = view;
}
}
class AdViewHolder extends RecyclerView.ViewHolder {
MarketFeedAdItemView adItemView;
public AdViewHolder(MarketFeedAdItemView view) {
super(view);
this.adItemView = view;
}
}
private NativeAd nativeAd;
private AdChoicesView adChoicesView;
private void showNativeAd(AdViewHolder viewHolder){
AdSettings.addTestDevice("a6ffb7bec7af13f768f033dbfea042df");
nativeAd = new NativeAd(context, "846223392142435_1025413774223395");
nativeAd.setAdListener(new AdListener() {
@Override
public void onError(Ad ad, AdError adError) {
}
@Override
public void onAdLoaded(Ad ad) {
final MarketFeedAdItemView adItemView = viewHolder.adItemView;
// Setting the Text
adItemView.nativeAdSocialContext.setText(nativeAd.getAdSocialContext());
adItemView.nativeAdCallToAction.setText(nativeAd.getAdCallToAction());
adItemView.nativeAdTitle.setText(nativeAd.getAdTitle());
adItemView.nativeAdBody.setText(nativeAd.getAdBody());
// Downloading and setting the ad icon
NativeAd.Image adIcon = nativeAd.getAdIcon();
NativeAd.downloadAndDisplayImage(adIcon, adItemView.nativeAdIcon);
// Download and setting the cover image
/*NativeAd.Image adCoverImage = nativeAd.getAdCoverImage();*/
adItemView.nativeAdMedia.setNativeAd(nativeAd);
// Add adChoices icon
if (adChoicesView == null) {
adChoicesView = new AdChoicesView(context, nativeAd, true);
adItemView.addView(adChoicesView, 0);
}
nativeAd.registerViewForInteraction(adItemView);
}
@Override
public void onAdClicked(Ad ad) {
}
});
nativeAd.loadAd();
}
}
public abstract class LoadingRowRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final int ROW_VIEW_TYPE_LOADING = 72398; // obscure number
private boolean mContainsLoadingRow;
protected abstract int getContentDataSize();
protected abstract int getViewType(int position);
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case ROW_VIEW_TYPE_LOADING:
return new LoadingViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.loading_row, parent, false));
}
throw new IllegalArgumentException("viewType is not ROW_VIEW_TYPE_LOADING. You must handle all other values of viewType (defined by getViewType) before calling super.");
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
// empty
}
@Override
public final int getItemCount() {
return mContainsLoadingRow ? (getContentDataSize() + 1) : getContentDataSize();
}
@Override
public int getItemViewType(int position) {
return (position == getContentDataSize()) ? ROW_VIEW_TYPE_LOADING : getViewType(position);
}
/**
* Sets a boolean which is used by getItemCount and in turn getItemViewType to determine which view type the row should be (loading view vs. other view).
* Should only be called when there is more results to load in an upcoming api request (determined by calling fragment).
*/
public void toggleLoadingRowOn() {
mContainsLoadingRow = true;
}
/**
* Checks to see if a loading row exists by checking an instance boolean and removes the row / clears the boolean.
* This helps to 'replace' a loading row with a different row.
*/
public void toggleLoadingRowOff() {
if (mContainsLoadingRow) {
mContainsLoadingRow = false;
// removes the loading row explicitly instead of allowing it to be 'pushed' down when new user suggestion rows are added.
// this is only required to maintain consistency with the rest of the app.
int position = getContentDataSize();
if (position >= 0) {
notifyItemRemoved(position);
}
}
}
protected class LoadingViewHolder extends RecyclerView.ViewHolder {
public LoadingViewHolder(View v) {
super(v);
}
}
}
public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener {
private static final int VISIBLE_THRESHOLD = 5; // The minimum amount of items to have below your current scroll position before loading more
private LinearLayoutManager mLinearLayoutManager;
public abstract void onLoadMore();
public EndlessRecyclerOnScrollListener(LinearLayoutManager linearLayoutManager) {
this.mLinearLayoutManager = linearLayoutManager;
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int totalItemCount = mLinearLayoutManager.getItemCount();
int firstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition();
int visibleItemCount = recyclerView.getChildCount();
int lastItemVisible = firstVisibleItem + visibleItemCount;
// once the last visible item is within VISIBLE_THRESHOLD from the bottom, we want to load more
if ((totalItemCount - lastItemVisible) <= VISIBLE_THRESHOLD) {
onLoadMore();
}
}
}
feedItems = new ArrayList<>();
List<Feed> adItems = new ArrayList<>();
recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
marketFeedRecyclerAdapter = new MarketFeedRecyclerAdapter(this, feedItems, new ImageLoader(new FeedItemFileCache(this)), adItems);
bindAdItemView((AdViewHolder) viewHolder);
public class MarketFeedRecyclerAdapter extends LoadingRowRecyclerAdapter {
private static final int VIEW_TYPE_MARKET_FEED = 0;
private static final int VIEW_TYPE_AD = 1;
private final Context context;
private final List<Feed> feedItems;
private final ImageLoader feedItemImageLoader;
private FeedItemClickListener feedItemClickListener;
private boolean isLongPressed = false;
public MarketFeedRecyclerAdapter(Context context, List<Feed> feedItems, ImageLoader feedItemImageLoader, List<Feed> adItems) {
this.context = context;
this.feedItems = feedItems;
this.feedItemImageLoader = feedItemImageLoader;
this.feedItems.addAll(adItems);
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case VIEW_TYPE_MARKET_FEED:
return new MarketFeedViewHolder(new FeedItemView(context));
case VIEW_TYPE_AD:
return new AdViewHolder(new MarketFeedAdItemView(context));
}
return super.onCreateViewHolder(parent, viewType);
}
// Differentiate between feedItem views and nativeAds
@Override
public int getViewType(int position) {
int viewType = VIEW_TYPE_MARKET_FEED;
if ((position % 25 == 0)) {
viewType = VIEW_TYPE_AD;
}
return viewType;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
if (getViewType(position) == VIEW_TYPE_MARKET_FEED) {
bindMarketFeedItemView((MarketFeedViewHolder) viewHolder, position - position / 6);
} else {
bindAdItemView((AdViewHolder) viewHolder);
}
}
// For Ad Objects
private void bindAdItemView(AdViewHolder viewHolder) {
showNativeAd(viewHolder);
}
private void bindMarketFeedItemView(MarketFeedViewHolder viewHolder, int position) {
final FeedItemView feedItemView = viewHolder.feedItemView;
final Feed feedDesign = feedItems.get(position);
// TODO we can probably conditionally show or hide these based on the type of feed item, same as in FeedActivitySingle
feedItemView.showOrHideEditButton(false);
feedItemView.showOrHideBuyButton(true);
feedItemView.showOrHideFlipButton(feedDesign.getDesign().getCompressedBackImage() != null);
feedItemView.showOrHidePriceText(true);
// Set the results into TextViews
feedItemView.setProductPriceText(String.valueOf(feedDesign.getDesign().getPrice()));
feedItemView.setDownloadsText(String.valueOf(feedDesign.getDesign().getDownloadCount()));
feedItemView.setLikesText(String.valueOf(feedDesign.getDesign().getLikesCount()));
feedItemView.setUsernameText(feedDesign.getDesign().getAuthor().getUsername());
feedItemView.setTimestampText(feedDesign.getTimestampText());
feedItemView.getSaveImage().setImageResource(feedDesign.isInPersonalGallery() ? R.drawable.ic_action_saved : R.drawable.ic_not_saved);
feedItemView.getLikeImage().setImageResource(feedDesign.isLiked() ? R.drawable.ic_action_like_feed_full : R.drawable.ic_action_like_feed);
feedItemView.getTrashImage().setVisibility(ParseHelper.isCurrentUser(feedDesign.getDesign().getAuthor().getObjectId()) ? View.VISIBLE : View.GONE);
feedItemView.getFeedSocialShareImage().setVisibility(View.VISIBLE);
switch(feedDesign.getDisplayedSide()) {
case FRONT:
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getCompressedImage().getUrl(), feedItemView.getImage(), feedItemView.getProgressBar());
break;
case BACK:
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getCompressedBackImage().getUrl(), feedItemView.getImage(), feedItemView.getProgressBar());
break;
}
if(feedDesign.getDesign().getAuthor().getProfilePicture() != null) {
feedItemImageLoader.DisplayImage(feedDesign.getDesign().getAuthor().getProfilePicture().getUrl(), feedItemView.getProfilePicture(), null); // TODO should this use profilePictureFileCache?
} else {
viewHolder.feedItemView.getProfilePicture().setImageResource(R.drawable.ic_anonymous);
}
SetCommentViews(feedItemView, feedDesign.getComments());
SetClickListeners(feedItemView, feedDesign, position);
}
@Override
protected int getContentDataSize() {
return feedItems.size();
}
class MarketFeedViewHolder extends RecyclerView.ViewHolder {
FeedItemView feedItemView;
public MarketFeedViewHolder(FeedItemView view) {
super(view);
this.feedItemView = view;
}
}
class AdViewHolder extends RecyclerView.ViewHolder {
MarketFeedAdItemView adItemView;
public AdViewHolder(MarketFeedAdItemView view) {
super(view);
this.adItemView = view;
}
}
private NativeAd nativeAd;
private AdChoicesView adChoicesView;
private void showNativeAd(AdViewHolder viewHolder){
AdSettings.addTestDevice("a6ffb7bec7af13f768f033dbfea042df");
nativeAd = new NativeAd(context, "846223392142435_1025413774223395");
nativeAd.setAdListener(new AdListener() {
@Override
public void onError(Ad ad, AdError adError) {
}
@Override
public void onAdLoaded(Ad ad) {
final MarketFeedAdItemView adItemView = viewHolder.adItemView;
// Setting the Text
adItemView.nativeAdSocialContext.setText(nativeAd.getAdSocialContext());
adItemView.nativeAdCallToAction.setText(nativeAd.getAdCallToAction());
adItemView.nativeAdTitle.setText(nativeAd.getAdTitle());
adItemView.nativeAdBody.setText(nativeAd.getAdBody());
// Downloading and setting the ad icon
NativeAd.Image adIcon = nativeAd.getAdIcon();
NativeAd.downloadAndDisplayImage(adIcon, adItemView.nativeAdIcon);
// Download and setting the cover image
/*NativeAd.Image adCoverImage = nativeAd.getAdCoverImage();*/
adItemView.nativeAdMedia.setNativeAd(nativeAd);
// Add adChoices icon
if (adChoicesView == null) {
adChoicesView = new AdChoicesView(context, nativeAd, true);
adItemView.addView(adChoicesView, 0);
}
nativeAd.registerViewForInteraction(adItemView);
}
@Override
public void onAdClicked(Ad ad) {
}
});
nativeAd.loadAd();
}
}
public abstract class LoadingRowRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
public static final int ROW_VIEW_TYPE_LOADING = 72398; // obscure number
private boolean mContainsLoadingRow;
protected abstract int getContentDataSize();
protected abstract int getViewType(int position);
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
switch (viewType) {
case ROW_VIEW_TYPE_LOADING:
return new LoadingViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.loading_row, parent, false));
}
throw new IllegalArgumentException("viewType is not ROW_VIEW_TYPE_LOADING. You must handle all other values of viewType (defined by getViewType) before calling super.");
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
// empty
}
@Override
public final int getItemCount() {
return mContainsLoadingRow ? (getContentDataSize() + 1) : getContentDataSize();
}
@Override
public int getItemViewType(int position) {
return (position == getContentDataSize()) ? ROW_VIEW_TYPE_LOADING : getViewType(position);
}
/**
* Sets a boolean which is used by getItemCount and in turn getItemViewType to determine which view type the row should be (loading view vs. other view).
* Should only be called when there is more results to load in an upcoming api request (determined by calling fragment).
*/
public void toggleLoadingRowOn() {
mContainsLoadingRow = true;
}
/**
* Checks to see if a loading row exists by checking an instance boolean and removes the row / clears the boolean.
* This helps to 'replace' a loading row with a different row.
*/
public void toggleLoadingRowOff() {
if (mContainsLoadingRow) {
mContainsLoadingRow = false;
// removes the loading row explicitly instead of allowing it to be 'pushed' down when new user suggestion rows are added.
// this is only required to maintain consistency with the rest of the app.
int position = getContentDataSize();
if (position >= 0) {
notifyItemRemoved(position);
}
}
}
protected class LoadingViewHolder extends RecyclerView.ViewHolder {
public LoadingViewHolder(View v) {
super(v);
}
}
}
public abstract class EndlessRecyclerOnScrollListener extends RecyclerView.OnScrollListener {
private static final int VISIBLE_THRESHOLD = 5; // The minimum amount of items to have below your current scroll position before loading more
private LinearLayoutManager mLinearLayoutManager;
public abstract void onLoadMore();
public EndlessRecyclerOnScrollListener(LinearLayoutManager linearLayoutManager) {
this.mLinearLayoutManager = linearLayoutManager;
}
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int totalItemCount = mLinearLayoutManager.getItemCount();
int firstVisibleItem = mLinearLayoutManager.findFirstVisibleItemPosition();
int visibleItemCount = recyclerView.getChildCount();
int lastItemVisible = firstVisibleItem + visibleItemCount;
// once the last visible item is within VISIBLE_THRESHOLD from the bottom, we want to load more
if ((totalItemCount - lastItemVisible) <= VISIBLE_THRESHOLD) {
onLoadMore();
}
}
}
公共类MarketFeedRecyclerAdapter扩展了LoadingRowRecyclerAdapter{
私有静态最终整数视图\类型\市场\馈送=0；
私有静态最终int视图类型AD=1；
私人最终语境；
私人最终项目清单；
私有最终ImageLoader feedItemImageLoader；
私有FeedItemClickListener FeedItemClickListener；
私有布尔值isLongPressed=false；
公共市场FeedRecyclerAdapter（上下文上下文、列表feedItems、ImageLoader feedItemImageLoader、列表adItems）{
this.context=上下文；
此项。feedItems=feedItems；
this.feedItemImageLoader=feedItemImageLoader；
此.feedItems.addAll（adItems）；
}
@凌驾
public RecyclerView.ViewHolder onCreateViewHolder（视图组父级，int-viewType）{
开关（视图类型）{
案例视图\u类型\u市场\u提要：
返回新的MarketFeedViewHolder（新的FeedItemView（上下文））；
案例视图\类型\广告：
返回新的AdViewHolder（new MarketFeedAdItemView（上下文））；
}
返回super.onCreateViewHolder（父级，viewType）；
}
//区分feedItem视图和NativeAD
@凌驾
公共int getViewType（int位置）{
int viewType=视图\类型\市场\提要；
如果（（位置%25==0））{
视图类型=视图类型广告；
}
返回视图类型；
}
@凌驾
BindViewHolder上的公共无效（RecyclerView.ViewHolder ViewHolder，int位置）{
if（getViewType（position）=视图类型市场馈送）{
bindMarketFeedItemView（（MarketFeedViewHolder）viewHolder，位置-位置/6）；
}否则{
bindAdItemView（（AdViewHolder）视图持有者）；
}
}
//对于广告对象
私有void BindItemView（AdViewHolder视图持有者）{
showNativeAd（视图持有者）；
}
私有void bindMarketFeedItemView（MarketFeedViewHolder视图持有人，内部位置）{
最终FeedItemView FeedItemView=viewHolder.FeedItemView；
最终饲料设计=饲料项目。获取（位置）；
//TODO我们可能会根据提要项的类型有条件地显示或隐藏这些内容，与FeedActivitySingle中的内容相同
feedItemView.showOrHideEditButton（假）；
feedItemView.showOrHideBuyButton（真）；
feedItemView.showOrHideFlipButton（feedDesign.getDesign（）.getCompressedBackImage（）！=null）；
feedItemView.showOrHidePriceText（true）；
//将结果设置为文本视图
feedItemView.setProductPriceText（String.valueOf（feedDesign.getDesign（）.getPrice（））；
feedItemView.setDownloadsText（String.valueOf（feedDesign.getDesign（）.getDownloadCount（））；
feedItemView.setLikeText（String.valueOf（feedDesign.getDesign（）.getLikeCount（））；
feedItemView.setUsernameText（feedDesign.getDesign（）.getAuthor（）.getUsername（））；
setTimestampText（feedDesign.getTimestampText（））；
feedItemView.getSaveImage（）.setImageResource（feedDesign.IsInputPersonalGallery（）？R.drawable.ic_操作保存：R.drawable.ic_未保存）；
feedItemView.getLikeImage（）.setImageResource（feedDesign.isLiked（）？R.drawable.ic_action_like_feed_full:R.drawable.ic_action_like_feed）；
feedItemView.getTrashImage（）.setVisibility（ParseHelper.isCurrentUser（feedDesign.getDesign（）.getAuthor（）.getObjectId（））？View.VISIBLE:View.GONE）；
feedItemView.getFeedSocialShareImage（）.setVisibility（View.VISIBLE）；
开关（feedDesign.getDisplayedSide（））{
案件正面：
feedItemImageLoader.DisplayImage（feedDesign.getDesign（）.getCompressedImage（）.getUrl（），feedItemView.getImage（），feedItemView.getProgressBar（））；
打破
案件背景：
feedItemImageLoader.DisplayImage（feedDesign.getDesign（）.getCompressedBackImage（）.getUrl（），feedItemView.getImage（），feedItemView.getProgressBar（））；
打破
}
if（feedDesign.getDesign（）.getAuthor（）.getProfilePicture（）！=null）{
feedItemImageLoader.DisplayImage（feedDesign.getDesign（）.getAuthor（）.getProfilePicture（）.getUrl（），feedItemView.getProfilePicture（），null）；//该如何使用profilePictureFileCache？
}否则{
viewHolder.feedItemView.getProfilePicture（）.setImageResource（R.drawable.ic_匿名）；
}
SetCommentView（feedItemView，feedDesign.getComments（））；
设置ClickListeners（feedItemView、feedDesign、position）；
}
@凌驾
受保护的int getContentDataSize（）{
返回feedItems.size（）；
}
类MarketFeedViewHolder扩展了RecyclerView.ViewHolder{
FeedItemView FeedItemView；
公共市场FeedViewHolder（FeedItemView视图）{
超级（视图）；
this.feedItemView=视图；
}
}
类AdViewHolder扩展了RecyclerView.ViewHolder{
MarketFeedAdItemView adItemView；
公共顾问（MarketFeedAdItemView视图）{
超级（视图）；
this.adItemView=视图；
}
}
私有的本地的本地的；
私人AdChoiceView AdChoiceView；
私有void showNativeAd（AdViewHolder视图持有者）{
AdSettings.addTestDevice（“a6ffb7bec7af13f768f033dbfea042df”）；
nativeAd=新的nativeAd（上下文，“846223392142435_1025413774223395”）；
nativeAd.setAdListener（新的AdListener（）{
@凌驾
公共无效者（广告、广告、广告）{
}
@凌驾
已加载的公共无效（Ad）{
最终市场反馈Aditemie