小编ami*_*ava的帖子

这是一个愚蠢的问题,但我找不到我做错了什么.

我正在使用FirebaseRecyclerAdapter来填充recyclerView,但是项目会出现意想不到的空间.

片段类:

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

    mProgressBar = (ProgressBar)view.findViewById(R.id.progressBar);
    mTagsRecyclerView = (RecyclerView) view.findViewById(R.id.tagsRecyclerView);
    mLinearLayoutManager = new LinearLayoutManager(getContext());

    mFirebaseDatabaseReference = FirebaseDatabase.getInstance().getReference();
    mFirebaseAdapter = new FirebaseRecyclerAdapter<Tags, TagsViewHolder>(
            Tags.class,
            R.layout.item_message,
            TagsViewHolder.class,
            mFirebaseDatabaseReference.child("tags")) {

        @Override
        protected void populateViewHolder(TagsViewHolder viewHolder, Tags tags, int position) {
            mProgressBar.setVisibility(ProgressBar.INVISIBLE);
            viewHolder.tagTextView.setText(tags.getTagname());
            viewHolder.usrTextView.setText(tags.getUserid());
        }
    };


    mFirebaseAdapter.registerAdapterDataObserver(new RecyclerView.AdapterDataObserver() {
        @Override
        public void onItemRangeInserted(int positionStart, int itemCount) {
            super.onItemRangeInserted(positionStart, itemCount);
        }
    });

    mTagsRecyclerView.setLayoutManager(mLinearLayoutManager);
    mTagsRecyclerView.setAdapter(mFirebaseAdapter);

    mTagsRecyclerView.addOnItemTouchListener(new RecyclerViewItemClickListener(getContext(),
            new RecyclerViewItemClickListener.OnItemClickListener() { …

我刚开始构建android项目时遇到问题:

Execution failed for task ':app:transformClassesWithJarMergingForDebug'.

com.android.build.api.transform.TransformException:java.util.zip.ZipException:重复条目:com/crashlytics/android/answers/shim/R.class

试过其他相关的答案,比如从终端清理项目,重建但没有任何效果.