Question

我创建了一个无穷无尽的列表来处理来自API的分页，我在JSON中获取下一页数据并将其解析为我的活动。但是，我的适配器没有使用新项目进行更新。我已经调用了notifyDataSetChanged，它只是没有更新。知道我做错了什么吗？以下是我的代码：

private void loadData(final boolean firstLoad) {

    mDataFactory.getPostFeed(mThreads.getId(), mCurrentPage, new PostFeedDataFactory.PostFeedDataFactoryCallback() {
        @Override
        public void onPostDataReceived(PostResponse response) {
            mData = response;
            if (mData.getItems() != null) {
                for (int i = 0; i < mData.getItems().size(); i++) {
                    Posts singlePost = response.getItems().get(i);
                    postList.add(singlePost);
                }
                if (firstLoad) {
                    mIsLoading = false;
                    mData.getItems().clear();
                    mData.getItems().addAll(postList);


                    mEmoticonDataFactory.getEmoticonFeed(new EmoticonFeedDataFactory.EmoticonFeedDataFactoryCallback() {
                        @Override
                        public void onEmoticonDataReceived(EmoticonResponse response) {
                            mEmoticon = response;
                            populateUIWithData();
                        }

                        @Override
                        public void onEmoticonDataFailed(Exception exception) {

                        }
                    });

                } else {
                    mIsLoading = false;
                    refreshPosts(postList);
                }

                if (mData.getItems().size() > 0) {
                    if (Integer.valueOf(mData.getTotalPosts()) >= response.getItems().size()) {
                        mCurrentPage++;
                    } else {
                        mIsLastPage = true;
                    }
                }

            }
        }

        @Override
        public void onPostDataFailed(Exception exception) {
        }
    });


}

private void populateUIWithData() {

    mThreadText = (TextView) findViewById(R.id.threadText);


    if (mThreads != null) {
        if (mThreads.getName() != null) {
            mThreadText.setText(mThreads.getName());
        }
    }
    if (mAdapter == null){
        mAdapter = new PostAdapter(this, mData, mEmoticon);
        mRecyclerView.setAdapter(mAdapter);
    } else {
        mAdapter.setData(postList);
        mAdapter.notifyDataSetChanged();
    }

    mRecyclerView.addOnScrollListener(paginationListener);


}

private RecyclerView.OnScrollListener paginationListener = new RecyclerView.OnScrollListener() {
    @Override
    public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
        super.onScrollStateChanged(recyclerView, newState);
    }

    @Override
    public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
        super.onScrolled(recyclerView, dx, dy);
        int visibleItemCount = mLayoutManager.getChildCount();
        int totalItemCount = mLayoutManager.getItemCount();
        int firstVisibleItemPosition = mLayoutManager.findFirstVisibleItemPosition();

        if (!mIsLoading && !mIsLastPage) {
            if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount) {
                loadMoreItems();
            }
        }
    }
};

private void loadMoreItems() {
    mIsLoading = true;
    loadData(false);
}

private void refreshPosts(ArrayList<Posts> newObjects) {
    postList.addAll(newObjects);
    populateUIWithData();

}

此外，这是我的适配器

PostAdapter.java

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    Posts posts = mPost.getItem(position);
    emoticons = mEmoticon.getItems();
    String message = null;
    String emoMessage = null;

    if (posts.getPost() != null) {
        if (posts.getPost().getMessage() != null) {
            message = posts.getPost().getMessage();
            emoMessage = message;


            if (emoticons != null) {
                for(Emoticons emoticon : this.emoticons) {
                    if (message.contains(emoticon.getEmoticon().getCode())) {
                        emoMessage = message.replaceAll(Constants.EMO_REGEX, emoticon.getEmoticon().getUrl());
                    }

                }
            }
        }

        if (posts.getPost().getUsername() != null) {
            holder.mAuthorTextView.setText("Posted by: " + posts.getPost().getUsername());
        }

        if (posts.getPost().getHighlighting().equals("op")) {
            holder.mPostTextView.setTypeface(Typeface.DEFAULT_BOLD);
        }

        }

            holder.mPostTextView.setText(Html.fromHtml(emoMessage, new Html.ImageGetter() {
                @Override
                public Drawable getDrawable(String source) {
                    Drawable d = null;
                    try {
                        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
                        StrictMode.setThreadPolicy(policy);
                        URL url = new URL(source);
                        InputStream is = url.openStream();
                        Bitmap b = BitmapFactory.decodeStream(is);
                        d = new BitmapDrawable(Resources.getSystem(), b);
                        d.setBounds(0, 0, d.getIntrinsicWidth(), d.getIntrinsicHeight());
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    return d;
                }
            }, new Html.TagHandler() {
                @Override
                public void handleTag(boolean opening, String tag, Editable output, XMLReader xmlReader) {
                    if(tag.equalsIgnoreCase("strike") || tag.equals("s")) {
                        processStrike(opening, output);
                    }
                }
                private void processStrike(boolean opening, Editable output) {
                    int len = output.length();
                    if(opening) {
                        output.setSpan(new StrikethroughSpan(), len, len, Spannable.SPAN_MARK_MARK);
                    } else {
                        Object obj = getLast(output, StrikethroughSpan.class);
                        int where = output.getSpanStart(obj);

                        output.removeSpan(obj);

                        if (where != len) {
                            output.setSpan(new StrikethroughSpan(), where, len, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
                        }
                    }
                }

                private Object getLast(Editable text, Class kind) {
                    Object[] objs = text.getSpans(0, text.length(), kind);

                    if (objs.length == 0) {
                        return null;
                    } else {
                        for(int i = objs.length;i>0;i--) {
                            if(text.getSpanFlags(objs[i-1]) == Spannable.SPAN_MARK_MARK) {
                                return objs[i-1];
                            }
                        }
                        return null;
                    }
                }

            }));

    }

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

public void setData(ArrayList<Posts> array) {
    ArrayList<Posts> postList = this.mPost.getItems();
    postList = array;
}

Answer 1

我找到答案感谢@cYrixmorten我改变了我的setData方法看起来像这样

public void setData(ArrayList<Posts> array) {
    mPost.getItems().addAll(array);
}

我基本上只是忘了更新我的适配器为我填充...但我只想感谢那些帮助过的人。 :)

（分页）来自API的无尽列表 - Android Recycler View

1 个答案: