其中一种方法就是，根据usb设备的vendor_id和product_id，然后从数据库中查找产品名称。这种方法可行的原...
而不是调用回调。我的建议是检查从firebase快照的结果，并检查您的数据类FoodData是否定义正确，提醒设置...
Realtime Database Commands CommandDescription database:getFetch data from the current project's database and display it as JSON. Supports querying on indexed data. database:setReplace all data at a specified location in the current project's database. Takes input from file, STDIN, or command-...
Firebase has two databases: Realtime Database and Firestore. Both are NoSQL databases with similar features and different pricing models. Firestore supports better querying features and both databases are designed so that querying latency is not affected by the database size. View full profile Joaqui...
在下一个活动中,我希望来自Firebase的数据以我选择的类别为基础的回收器视图的形式,但是正在调用来自Firebase的所有数据。我使用OrderBychild添加了我的DatabaseReference旁边的查询,以获取所需的数据。 mainActivity.java. packagecom.example.admin.trialforevents; ...
btnViewDatabase=(Button) findViewById(R.id.view_items_screen);mAuth=FirebaseAuth.getInstance();mAuthListener=newFirebaseAuth.AuthStateListener(){@OverridepublicvoidonAuthStateChanged(@NonNullFirebaseAuthfirebaseAuth){// 指明一个参数,字段或者方法的返回值不可以为nullFirebaseUser user=firebaseAuth.getCurren...
Firebase Real Time Database Overview syncState: Two way data binding between any property on your component's state and any endpoint in Firebase. Use the same API you're used to to update your component's state (setState), and Firebase will also update. bindToState: One way data binding...
I'm using unity 5.5.0f3 with Firebase version 4.1.0 and whenever I try to run the Main scene for realtime database using my URL in the app.SetEditorDatabaseUrl("XXX"); it fails I made sure to set these rules { "rules": { ".read": "auth =...
It will also use Firebase's real-time database to store the group chat messages. 正如您可能已经猜到的,应用程序将依靠Firebase Auth来管理用户注册和登录。它还将使用Firebase的实时数据库来存储组聊天消息。 Prerequisites To be able to follow this step-by-step tutorial, you'll need the following: ...
) { super.onViewCreated(view, savedInstanceState) //initialize Realtime Database dbRef = Firebase.database.reference //initialize authentication auth = Firebase.auth //initialize currentUser currentUser = auth.currentUser!! //log item id Log.d("Log itemId", args.issueId) //get a query ...