从Google Play运行但不是从Android Studio运行时出现NullPointerException

Question

我有一个大问题,我不知道发生了什么,我已经上传了一个应用程序到Play商店,因为当我在模拟器上运行它甚至在我的真实设备上它没有崩溃,但现在当我下载来自Google Play的它说:

java.lang.NullPointerException: 
  at com..onBindViewHolder (ChooseCard.java)
  or                     .onCreateViewHolder (ChooseCard.java)
  at com..onBindViewHolder (ChooseCard.java)
  or                     .onCreateViewHolder (ChooseCard.java)
  at com.firebase.ui.database.FirebaseRecyclerAdapter.getItemCount (FirebaseRecyclerAdapter.java)
  or                     .onBindViewHolder (FirebaseRecyclerAdapter.java)
  or                     .onChildChanged (FirebaseRecyclerAdapter.java)
  or                     .onError (FirebaseRecyclerAdapter.java)
  at com.yarolegovich.discretescrollview.InfiniteScrollAdapter.access$100 (InfiniteScrollAdapter.java)
  or                     .getItemCount (InfiniteScrollAdapter.java)
  or                     .getItemViewType (InfiniteScrollAdapter.java)
  or                     .onAttachedToRecyclerView (InfiniteScrollAdapter.java)
  or                     .onBindViewHolder (InfiniteScrollAdapter.java)
  or                     .onCreateViewHolder (InfiniteScrollAdapter.java)
  or                     .wrap (InfiniteScrollAdapter.java)

这个问题已经好几天了,我找不到它,你能帮我一把吗？

有我的build.gradle实现

implementation fileTree(include: ['*.jar'], dir: 'libs')
implementation 'com.android.support:appcompat-v7:27.1.1'
implementation 'com.android.support.constraint:constraint-layout:1.1.0'
implementation 'com.android.support:design:27.1.1'
implementation 'com.intuit.sdp:sdp-android:1.0.4'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
implementation 'com.android.support:cardview-v7:27.1.1'
implementation 'com.google.firebase:firebase-core:15.0.0'
implementation 'com.google.firebase:firebase-auth:15.0.0'
implementation 'com.google.android.gms:play-services-auth:15.0.0'
implementation 'com.google.firebase:firebase-database:15.0.0'
implementation 'com.anjlab.android.iab.v3:library:1.0.44'
implementation 'com.firebaseui:firebase-ui-database:3.3.1'
implementation 'com.onesignal:OneSignal:3.7.1'
implementation 'com.yarolegovich:discrete-scrollview:1.3.2'
implementation 'com.pranavpandey.android:dynamic-toasts:0.9.0'
implementation 'pl.droidsonroids.gif:android-gif-drawable:1.2.11'
implementation 'com.google.android.gms:play-services-analytics:15.0.0'
.....
 dependencies {
        classpath 'com.android.tools.build:gradle:3.1.2'
        classpath 'com.google.gms:google-services:3.2.1'

编辑

我在Google Play上更新了我的应用程序并没有任何反应,仍然崩溃Activity,我现在知道如何调试这个,问题是当我从Google Play上下载应用程序时,在模拟器上(即使在新的模拟器中)设备没有崩溃)和我的真实设备.

正如@Marcos Vascondelos所说,我做了Build> Genereate Signed APK>将app-release.apk安装到我的设备上,问题是我无法登录它会转到这个方法:

 @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        // Result returned from launching the Intent from GoogleSignInApi.getSignInIntent(...);
        if (requestCode == RC_SIGN_IN) {
            Task<GoogleSignInAccount> task = GoogleSignIn.getSignedInAccountFromIntent(data);
            try {
                // Google Sign In was successful, authenticate with Firebase
                GoogleSignInAccount account = task.getResult(ApiException.class);
                firebaseAuthWithGoogle(account);
            } catch (ApiException e) {
                // Google Sign In failed, update UI appropriately
                Log.w(TAG, "Google sign in failed", e.getCause());
                Toast with e.getCause is null
            }
        }
    }

如果你想看看我如何登录以不在这个问题上添加更多代码,我就加入了这个GitHubGist

我已经读过它可能是SHA-1的问题,但我不知道为什么在模拟器上没问题,设备没问题,谷歌播放没问题,但是如果我直接安装.apk它会说空.

最后的编辑

我看到问题不在于Firebase调用,是填充列表,我的意思是产品被正确捕获,但当我尝试放入列表时它崩溃的地方

我的FirebaseRecyclerOptions适配器看起来像

 final FirebaseRecyclerOptions< CardPOJO > options =
                    new FirebaseRecyclerOptions.Builder< CardPOJO >()
                            .setQuery(products_ref, CardPOJO.class)
                            .build();



            adapter = new   FirebaseRecyclerAdapter< CardPOJO, CardHolder>(options) {
                @Override
                public CardHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                    //inflate the single recycler view layout(item)
                    View view = LayoutInflater.from(parent.getContext())
                            .inflate(R.layout.card_product, parent, false);
                    final CardHolder cardViewHolder = new CardHolder(view);
                    return cardViewHolder;
                }



                @Override
                public void onDataChanged() {
                    super.onDataChanged();
                    if(progressDialog!=null)progressDialog.dismiss();initViews();
                }


                @Override
                protected void onBindViewHolder(final CardHolder holder, int position, final CardPOJO model) {
                    holder.itemView.setSelected(0== position); ////where you are in the list
                    holder.getLayoutPosition();
                    switch (model.getState()){
                        case "free":
                            holder.card_image.setImageResource();
                            break;
                        case "not_free":
                            if(userOwnsProduct(model.getProduct_id())){
                                holder.card_image.setImageResource();
                            }
                            else{
                                holder.card_image.setImageResource();
                            }

                            break;
                        default:
                            break;
                    }
                    holder.view.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {
                            if(model.getState().equals("free")){
                                //normal stuff1

                            }
                            else{
                                if (!readyToPurchase) {
                                    DynamicToast.makeError(mContext,"Problems with Google Play",Toast.LENGTH_SHORT).show();
                                    return;
                                }
                                root_ref.child("PurchasedProducts").child(currentUser).addValueEventListener(new ValueEventListener() {
                                    @Override
                                    public void onDataChange(DataSnapshot dataSnapshot) {
                                        if(dataSnapshot.hasChild(model.getProduct_id())){
                                            //Normal stuff
                                        }
                                        else{
                                            bp.purchase((Activity) mContext,model.getProduct_id());
                                        }
                                    }

                                    @Override
                                    public void onCancelled(DatabaseError databaseError) {

                                    }
                                });

                            }

                        }
                    });


                }

            };
            adapter.startListening();



            infiniteAdapter = InfiniteScrollAdapter.wrap(adapter);
            itemPicker.setAdapter(infiniteAdapter);
            //.setItemTransitionTimeMillis(DiscreteScrollViewOptions.getTransitionTime());
            itemPicker.setItemTransformer(new ScaleTransformer.Builder()
                    .setMinScale(0.5f)
                    .build());

Answer 1

问题是在使用 时Proguard，我没有@Keep在我的 pojo 类上使用，因此当尝试使用数据库序列化该类时，firebase找不到属性，因为它们是混淆的。