firebase

[Solved] Retriving data from Firebase in Arraylist in Android [closed]

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Assuming you have a model class for your electrician object named Electrician, to get a list of electrician objects, please use the following code: DatabaseReference rootRef = FirebaseDatabase.getInstance().getReference(); DatabaseReference electricianRef = rootRef.child(“Employee”).child(“Electrician”); ValueEventListener valueEventListener = new ValueEventListener() { @Override public void onDataChange(DataSnapshot dataSnapshot) { List<Electrician> list = new ArrayList<>(); for(DataSnapshot ds : dataSnapshot.getChildren()) { Electrician … Read more

[Solved] I need of help in found one solution on problem, React,Firebase,For Loop [closed]

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You should use the callback in setState if you want to do that because it is async. Please refer to the following link to get more info: https://reactjs.org/docs/react-component.html#setstate Another alternative is to set the state only once instead of doing it multiple times. You don’t need to put all that info in the state only … Read more

[Solved] Code does not wait for FirebaseDatabase to be read

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As Selvin commented: data is loaded from Firebase asynchronously. You can’t reliably wait for the data to become available. See Setting Singleton property value in Firebase Listener. The solution is to move the code that needs the data from Firebase into the onDataChange in checkDataNew: fun checkDataNew() { var rootRef=FirebaseDatabase.getInstance().getReference(“BG Data”) // Read from the … Read more

[Solved] Android: Why can’t I move to another Acivity by using “Intent”?

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When you call the method “createNewUser()”, you are inside of an onClickListener. When you pass in ‘this’ as your context, you are passing in the context of your listener. Instead, when calling createNewUser, use ‘MainActivity.this’ as your Context, so then your app knows that the context is the whole activity and not just the listener. … Read more

[Solved] How to combine all Firebase ML kit APIs in one app?

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Just call all of the functions on your image file at once, then combine the results using something like zip in RXJava. Alternatively, you could nest the results (e.g. call FirebaseVision.getInstance().onDeviceTextRecognizer.processImage(image) inside the onSuccessListener of another function), although this will take much longer to complete all. If you provide code of your existing attempts, StackOverflow … Read more

[Solved] How to Sort Firebase data by date stored as Value

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you should store the data in miliseconds, is not that hard, and then you can bring the data and parse it in Date , look at this snippet try{ HttpClient httpclient = new DefaultHttpClient(); HttpResponse response = httpclient.execute(new HttpGet(“https://google.com/”)); StatusLine statusLine = response.getStatusLine(); if (statusLine.getStatusCode() == HttpStatus.SC_OK) { DateFormat df = new SimpleDateFormat(“EEE, d MMM … Read more

[Solved] How can i upload and retrieve an image to firebase storage in android in 2018 (taskSnapshot/getDownloadUrl deprecated) (Closed)

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Finally, I got the solution. And its working pretty fine. filePath.putFile(imageUri).addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() { @Override public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) { filePath.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() { @Override public void onSuccess(Uri uri) { Log.d(TAG, “onSuccess: uri= “+ uri.toString()); } }); } }); solved How can i upload and retrieve an image to firebase storage in android in 2018 (taskSnapshot/getDownloadUrl deprecated) … Read more

[Solved] Remove value from database using Cloud Functions

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You are returning from the function before calling remove. Try: return oldItemsQuery.once(‘value’, function(snapshot) { // create a map with all children that need to be removed var updates = {}; snapshot.forEach(function(child) { updates[child.key] = null }); // execute all updates in one go and return the result to end the function return ref.update(updates); }).then(function() {; … Read more