android - 奇怪的错误 java.lang.IllegalArgumentException : location must not be null or empty Firebase Android

Question

大家好，出现的异常有点奇怪，我不知道为什么它给了我真相并且工作得很好他们可以毫无问题地上传图像的“帖子” fragment 现在给了我那种类型错误，我不知道如何解决，因为我还是新手

异常:

 FATAL EXCEPTION: main
                                                                       Process: com.android.octa.memetixs, PID: 15679
                                                                       Theme: themes:{default=overlay:system, iconPack:system, fontPkg:system, com.android.systemui=overlay:system, com.android.systemui.navbar=overlay:system}
                                                                       java.lang.IllegalArgumentException: location must not be null or empty
                                                                           at com.google.android.gms.common.internal.zzac.zzb(Unknown Source)
                                                                           at com.google.firebase.storage.FirebaseStorage.getReference(Unknown Source)
                                                                           at com.android.octa.memetixs.ui.fragment.PostFragment$2.populateViewHolder(PostFragment.java:102)
                                                                           at com.android.octa.memetixs.ui.fragment.PostFragment$2.populateViewHolder(PostFragment.java:84)
                                                                           at com.firebase.ui.database.FirebaseRecyclerAdapter.onBindViewHolder(FirebaseRecyclerAdapter.java:196)
                                                                           at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:6356)
                                                                           at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:6389)
                                                                           at android.support.v7.widget.RecyclerView$Recycler.tryBindViewHolderByDeadline(RecyclerView.java:5335)
                                                                           at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5598)
                                                                           at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5440)
                                                                           at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5436)
                                                                           at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2224)
                                                                           at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1551)
                                                                           at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1511)
                                                                           at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:595)
                                                                           at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3583)
                                                                           at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3312)
                                                                           at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3844)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
                                                                           at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.support.v4.view.ViewPager.onLayout(ViewPager.java:1795)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
                                                                           at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1193)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
                                                                           at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1735)
                                                                           at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1579)
                                                                           at android.widget.LinearLayout.onLayout(LinearLayout.java:1488)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
                                                                           at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
                                                                           at android.view.View.layout(View.java:16639)
                                                                           at android.view.ViewGroup.layout(ViewGroup.java:5437)
                                                                           at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1735)
                                                                        at android.widget.Line

错误 fragment :

public class PostFragment extends Fragment {

private View mRootView;
private FirebaseRecyclerAdapter<Post, PostHolder> mPostAdapter;
private RecyclerView mPostRecyclerView;
private User mmUser;
private Post mmPost;


public PostFragment() {
    // Required empty public constructor
}


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


    FloatingActionButton fab = (FloatingActionButton) mRootView.findViewById(R.id.fabM);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            PostCreateDialog dialog = new PostCreateDialog();
            dialog.show(getFragmentManager(), null);
        }
    });

     init();
    return mRootView;
}

private void init() {
    mPostRecyclerView = (RecyclerView) mRootView.findViewById(R.id.recyclerview_post);
    mPostRecyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
    setupAdapter();
    mPostRecyclerView.setAdapter(mPostAdapter);
}

private void setupAdapter() {

    mPostAdapter = new FirebaseRecyclerAdapter<Post, PostHolder>(
            Post.class,
            R.layout.row_post,
            PostHolder.class,
            FirebaseUtils.getPostRef()
    ) {
        @Override
        protected void populateViewHolder(PostHolder viewHolder, final Post model, int position) {
            mmUser = new User();
            mmPost = new Post();
            viewHolder.setNumComments(String.valueOf(model.getNumComments()));
            viewHolder.setNumLikes(String.valueOf(model.getNumLikes()));
            viewHolder.setTime(DateUtils.getRelativeTimeSpanString(model.getTimeCreated()));
            viewHolder.setUsername(mmUser.getUser());
            viewHolder.setPostText(model.getPostText());







            StorageReference storageReference = FirebaseStorage.getInstance()
                    .getReference(mmPost.getPostImageUrl());
            Glide.with(getActivity())
                    .using(new FirebaseImageLoader())
                    .load(storageReference)
                    .into(viewHolder.postDisplayImageView);

            viewHolder.postLikeLayout.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    onLikeClick(model.getPostId());
                }
            });

            viewHolder.postCommentLayout.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent intent = new Intent(getContext(), CommentActivity.class);
                    intent.putExtra(Constants.EXTRA_POST, model);
                    startActivity(intent);
                }
            });


        }
    };

}

private void onLikeClick(final String postId) {
    FirebaseUtils.getPostLikedRef(postId)
            .addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {
                    if (dataSnapshot.getValue() != null) {
                        //user liked
                        FirebaseUtils.getPostRef()
                                .child(postId)
                                .child("numLikes")
                                .runTransaction(new Transaction.Handler() {
                                    @Override
                                    public Transaction.Result doTransaction(MutableData mutableData) {
                                        long num = mutableData.getValue(Long.class);
                                        mutableData.setValue(num - 1);
                                        return Transaction.success(mutableData);
                                    }

                                    @Override
                                    public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) {
                                        FirebaseUtils.getPostLikedRef(postId)
                                                .setValue(null);
                                    }
                                });
                    } else {
                        FirebaseUtils.getPostRef()
                                .child(postId)
                                .child("numLikes")
                                .runTransaction(new Transaction.Handler() {
                                    @Override
                                    public Transaction.Result doTransaction(MutableData mutableData) {
                                        long num = mutableData.getValue(Long.class);
                                        mutableData.setValue(num + 1);
                                        return Transaction.success(mutableData);
                                    }

                                    @Override
                                    public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) {
                                        FirebaseUtils.getPostLikedRef(postId)
                                                .setValue(true);
                                    }
                                });
                    }
                }

                @Override
                public void onCancelled(DatabaseError databaseError) {

                }
            });
}


public static class PostHolder extends RecyclerView.ViewHolder {


    TextView postOwnerUsernameTextView;
    TextView postTimeCreatedTextView;

    ImageView postDisplayImageView;
    TextView postTextTextView;

    LinearLayout postLikeLayout;
    TextView postNumLikesTextView;

    LinearLayout postCommentLayout;
    TextView postNumCommentsTextView;


    public  PostHolder(View itemView) {
        super(itemView);

        postOwnerUsernameTextView = (TextView) itemView.findViewById(R.id.tv_post_username);
        postTimeCreatedTextView = (TextView) itemView.findViewById(R.id.tv_time);
        postDisplayImageView = (ImageView) itemView.findViewById(R.id.iv_post_display);
        postLikeLayout = (LinearLayout) itemView.findViewById(R.id.like_layout);
        postCommentLayout = (LinearLayout) itemView.findViewById(R.id.comment_layout);
        postNumLikesTextView = (TextView) itemView.findViewById(R.id.tv_likes);
        postNumCommentsTextView = (TextView) itemView.findViewById(R.id.tv_comments);
        postTextTextView = (TextView) itemView.findViewById(R.id.tv_post_text);
    }

    public void setUsername(String username) {
        postOwnerUsernameTextView.setText(username);
    }

    public void setTime(CharSequence time) {
        postTimeCreatedTextView.setText(time);
    }

    public void setNumLikes(String numLikes) {
        postNumLikesTextView.setText(numLikes);
    }

    public void setNumComments(String numComments) {
        postNumCommentsTextView.setText(numComments);
    }

    public void setPostText(String text) {
        postTextTextView.setText(text);
    }

}
 }

firebase 引用的实用程序:

      public class FirebaseUtils {

//==============================================================================================
// USER REFERENCE
public static DatabaseReference getUserRef(String email) {
    return FirebaseDatabase.getInstance()
            .getReference(Constants.USERS_KEYS)
            .child(email);
}
public static FirebaseUser getCurrentUser() {
    return FirebaseAuth.getInstance().getCurrentUser();
}






              // POST REFERENCE
public static DatabaseReference getPostRef() {
    return FirebaseDatabase.getInstance()
            .getReference(Constants.POSTS_KEY);
}
public static Query getPostQuery() {
    return getPostRef().orderByChild(Constants.TIME_CREATED_KEY);
}
public static DatabaseReference getMyPostRef() {
    return FirebaseDatabase.getInstance().getReference(Constants.MY_POSTS)
            .child(getCurrentUser().getEmail().replace(".", ","));
}





// POST LIKED REFERENCE
public static DatabaseReference getPostLikedRef() {
    return FirebaseDatabase.getInstance()
            .getReference(Constants.POSTS_LIKED_KEY);
}
public static DatabaseReference getPostLikedRef(String postId) {
    return getPostLikedRef().child(getCurrentUser().getEmail()
            .replace(".", ","))
            .child(postId);
}








// USER ID
public static String getUid() {
    String path = FirebaseDatabase.getInstance().getReference().push().toString();
    return path.substring(path.lastIndexOf("/") + 1);
}








// POST IMAGE REFERENCE
public static StorageReference getImagesSRef() {
    return FirebaseStorage.getInstance().getReference(Constants.POST_IMAGES);
}








// COMMENT REFERENCE
public static DatabaseReference getCommentRef(String postId) {
    return FirebaseDatabase.getInstance().getReference(Constants.COMMENTS_KEY)
            .child(postId);
}







// RECORD

public static DatabaseReference getMyRecordRef() {
    return FirebaseDatabase.getInstance().getReference(Constants.USER_RECORD)
            .child(getCurrentUser().getEmail().replace(".", ","));
}



public static void addToMyRecord(String node,final String id) {
    FirebaseUtils.getMyRecordRef().child(node).runTransaction(new Transaction.Handler() {
        @Override
        public Transaction.Result doTransaction(MutableData mutableData) {
            ArrayList<String> myPostCollection;
            if (mutableData.getValue() == null) {
                myPostCollection = new ArrayList<>(1);
                myPostCollection.add(id);
                mutableData.setValue(myPostCollection);
            } else {
                myPostCollection = (ArrayList<String>) mutableData.getValue();
                myPostCollection.add(id);
                mutableData.setValue(myPostCollection);
            }
            return Transaction.success(mutableData);
        }

        @Override
        public void onComplete(DatabaseError databaseError, boolean b, DataSnapshot dataSnapshot) {

        }
    });
}

}

和 im 上的类(class)发送帖子:

 public class PostCreateDialog extends DialogFragment implements View.OnClickListener {

private static final int RC_PHOTO_PICKER = 1;
private View mRootView;
private Post mPost;

private ProgressDialog mProgressDialog;
private Uri mSelectedImageUri;
private ImageView mPostDisplay;

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    mPost = new Post();

    mProgressDialog = new ProgressDialog(getContext());
    mRootView = getActivity().getLayoutInflater().inflate(R.layout.post_create_dialog, null);
    mPostDisplay = (ImageView) mRootView.findViewById(R.id.post_dialog_display);
    mRootView.findViewById(R.id.post_dialog_select_imageview).setOnClickListener(this);
    mRootView.findViewById(R.id.post_dialog_send_imageview).setOnClickListener(this);
    builder.setView(mRootView);
    return builder.create();


}

@Override
public void onClick(View v) {
    switch (v.getId()) {
        case R.id.post_dialog_send_imageview:
            sendPost();
            break;
        case R.id.post_dialog_select_imageview:
            selectImage();
            break;
    }
}


private void selectImage(){
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("image/jpeg");
    intent.putExtra(Intent.EXTRA_LOCAL_ONLY, true);
    startActivityForResult(Intent.createChooser(intent, "Complete action using"), RC_PHOTO_PICKER);
}

private void sendPost(){
    mProgressDialog.setMessage("Sending post...");
    mProgressDialog.setCancelable(false);
    mProgressDialog.setIndeterminate(true);
    mProgressDialog.show();

    FirebaseUtils.getUserRef(FirebaseUtils.getCurrentUser().getEmail().replace(".", ","))
            .addListenerForSingleValueEvent(new ValueEventListener() {
                @Override
                public void onDataChange(DataSnapshot dataSnapshot) {
                    User user = dataSnapshot.getValue(User.class);
                    final String postUid = FirebaseUtils.getUid();
                    TextView postDialogTextView = (TextView) mRootView.findViewById(R.id.post_dialog_edittext);
                    String text = postDialogTextView.getText().toString();

                    mPost.setUser(user);
                    mPost.setNumComments(0);
                    mPost.setNumLikes(0);
                    mPost.setTimeCreated(System.currentTimeMillis());
                    mPost.setPostId(postUid);
                    mPost.setPostText(text);

                    if (mSelectedImageUri != null) {
                        FirebaseUtils.getImagesSRef()
                                .child(mSelectedImageUri.getLastPathSegment())
                                .putFile(mSelectedImageUri)
                                .addOnSuccessListener(getActivity(),
                                        new OnSuccessListener<UploadTask.TaskSnapshot>() {
                                            @Override
                                            public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
                                                String url = Constants.POST_IMAGES + "/" + mSelectedImageUri.getLastPathSegment();
                                                //String downloadUrl = taskSnapshot.getDownloadUrl().toString();
                                                mPost.setPostImageUrl(url);
                                                addToMyPostList(postUid);
                                            }


                                        });
                    } else {
                        addToMyPostList(postUid);
                    }
                }

                @Override
                public void onCancelled(DatabaseError databaseError) {
                    mProgressDialog.dismiss();
                }
            });
}

private void addToMyPostList(final String postUid){
    FirebaseUtils.getPostRef().child(postUid)
            .setValue(mPost);
    FirebaseUtils.getMyPostRef().child(postUid).setValue(true)
            .addOnCompleteListener(getActivity(), new OnCompleteListener<Void>() {
                @Override
                public void onComplete(@NonNull Task<Void> task) {
                    mProgressDialog.dismiss();
                    dismiss();
                }
            });

    FirebaseUtils.addToMyRecord(Constants.POSTS_KEY, postUid);
}

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    if (requestCode == RC_PHOTO_PICKER) {
        if (resultCode == RESULT_OK) {
            mSelectedImageUri = data.getData();
            mPostDisplay.setImageURI(mSelectedImageUri);
        }
    }

}
}

Answer 1

我认为您的问题出在这里:

  //You only initialize. Never assign a value to PostImageUrl()
  mmPost = new Post();
            viewHolder.setNumComments(String.valueOf(model.getNumComments()));
            viewHolder.setNumLikes(String.valueOf(model.getNumLikes()));
            viewHolder.setTime(DateUtils.getRelativeTimeSpanString(model.getTimeCreated()));
            viewHolder.setUsername(mmUser.getUser());
            viewHolder.setPostText(model.getPostText());







            StorageReference storageReference = FirebaseStorage.getInstance()
                     //This reference location is empty. mmPost is only initialized, and doesn't have PostURL assigned to it yet.
                    .getReference(mmPost.getPostImageUrl());
            Glide.with(getActivity())

您需要在创建帖子对象后通过分配一个值来获取对帖子 URL 的引用:

mmPost = new Post();
mmPost.setPostURL(FirebaseUtils.getMyPostReference());

或者类似的东西。