Most voted "asynctask" questions
Asynctask is an Abstract Class used to run methods on a background thread, leaving Thread UI (Main Thread) free. The use of Asynctask is for processes of few seconds, in case it is necessary to perform more time-consuming processing, it is advisable to use the options of Apis present in the package "java.util.Concurrent", as indicated in the documentation.
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answer211
viewspublishProgress() updates onProgressUpdate() only at the end of theInBackground()
I have an app that updates the progress bar, the same way I’m doing in another app, but in this new app, the onProgressUpdate() only executes at the end of doInBackground(). It is called the method…
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answers60
viewsAttempt to invoke virtual method on a null Object Reference Fragment Asynctask
I’ve been at this for days and I still don’t understand why this mistake, I have a Asynctask who takes a Urls of a database I want to take the url and define the imageView gives an error on this…
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answer96
viewsProblem with Sqlite in Asynctask’s onPostExecute method
I’m having a problem running an Sqlite function in the Asynctask onPostExecute method. When I implement the same function in Activity it runs normally, but in onPostExecute it doesn’t even enter the…
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answers84
viewsAsynctask and Fragments
Hello, I’m new to development and have some questions. I have to implement a new layout, where: I converted the activities that load the data into fragments; In a new Activity the graph fragment is…
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answer487
viewsAndroid - Asynctask and Progressdialog
Hey there, guys. I’m just starting in the Mobile area and I’m having some problems with the issue of user experience in my App. In my App, it obtains a JSON from the server through a AsyncTask.…
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answer178
viewsNotify current Activity which background function has finished running Android
I have a class that looks for a list of clients in the background with a AsyncTask. She can be called any Activity, and returns nothing, just looks for the list of customers that comes in json and…
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answer124
viewspublishProgress only updates the Progress Dialog at the end of theInBackgorund
I am unable to update the progress of my Progress dialog during the insertion process into the Sqlite database from a JSON array. The process occurs smoothly, however, the update only happens at the…
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answer51
viewsHow to add Asynctask to this task?
Hi, could someone help me add an Asynctask to this task? Here I am connecting to a JSON for information, then it will be added to Recyclerview. RequestQueue queue = Volley.newRequestQueue(this);…
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answer597
viewsrun Task.Whenall wait and then run back
I’m trying to make a console program, run a task, wait and run again and continue in this cycle endlessly. In theory it would place the function within a While(true) infinite loop, but as the…
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answer47
viewsGridview not updated (Android)
I am creating an app that when starting it performs an asynchronous task that queries an api, when picking the result it will insert into Adapter. I’ve tried several ways, but only the images appear…
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answers202
viewsHow to WRITE android data to Mysql using webservices (Asynctask)?
I have an android application that has several buttons on different screens, I must join the buttons clicked and send to Mysql. I read about webservices (http://www.androidpro.com.br/webservice/)…
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answers1248
viewsHow to catch the return of the method ofInBackground on android?
I’m starting to work with Asynctasks and I don’t know much yet. I created a class that extends Asynctask and implemented the method doInBackground(), but my question now is how do I get the return…
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answer92
viewsReturn onPostExecute() String
I tried using the @ramaral tip Original post but my code has build errors that I don’t know how to delete. 1-In the interface statement the error appears: Unexpected interface . 2-The…
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answer291
viewsAsynctask onPreExecute method problem - Android Studio
I have this Activity that displays the user score of my application. However, when this Activity is called, what should occur is a ProgressDialog being displayed with the message "Buscando Pizza"…
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answers32
viewsHow to check if the last Asynktask is over
I have an android application that communicates with the site through json that is obtained in the following way: @Override protected String doInBackground(String... params) { String url =…
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answers62
viewsReal-time Audio Processing on android: Thread or Asynctask?
I’m starting to develop an android app that will "listen" to the audio and will draw its waveform on the screen. But the first step I wanted to just "listen" to the audio and show on the screen the…
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answers92
viewsHow to upload web images inside a Listview?
I have a json more or less like this (simplified the original): [{ image:"http://site.com/imagem.png", title:"Titulo", desc: "descrição" }] I would like to upload all the content, including the…
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answer98
viewsAsynctask - Does not run twice
I am performing a process in my App, where in Mainactivity, I press a button, then it loads a JSON in another Activity that brings all the information correctly.. However, when I close the screen…
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answers526
viewsUTF-8 sending by POST does not work
Have the following connection class: public class Conexao { public static String postDados(String urlUsuario, String parametrosUsuario) { URL url; HttpURLConnection connection = null; try { url =…
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answer63
viewsAsynctask Android generating Nullpointerexception
I have this static class in an Activity where its function is to download a file and save it on the user’s device. I tested on a real device in the version of Android 7.1.1 and 4.1.2 and worked…
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answers88
viewsSimpleadapter (JSON with sub-items)
I’m new to Android development, and I’m trying for days to make my first app work but without success. I am using Asynctask to make the request and Simpleadapter, it back the data but my JSON has…
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answer198
viewsRecycler view com async task
I have the class of my Activity public class Convenio_Conselho_Listar_TL extends AppCompatActivity { public List<Convenio_Conselho_Grid_BD> oConvenios; RecyclerView mRecyclerView; private…
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answers56
viewsHow to call methods so that they have a delay?
I have a class: public class Robo { public async Task Ligar() { /* * Algo que pode demorar ou nao depende do status do robo * */ } } public class TesteRobo { public void Main() { List < Robo >…
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answer32
viewsAsynctask and Adapter for Listview in conflict
I’m creating a chat app using socket and after developing all the layout I decided to enter the connection part... the problem is that when I receive messages the app closes and presents some…
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answer49
viewsWhy do I get null on onPostExecute?
This code is only returning null the Return, how can I fix it? @SuppressWarnings("deprecation") public class MecanismoString extends AsyncTask <String, String, String> {…
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answers30
viewsuse Asynctask to fetch data but my Activity is slow to appear
I have a class RepositorioCidades searching data from cities using AsyncTask and returns a ArrayAdapter to the MainActivity, but when I call the MainActivity is a black screen until the data of the…
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answer31
viewsException coming from a LIB and closing the system c#
I made a lib to manage the part of a system of mine, until then everything is ok, the problem occurs when this lib launches an Exception: public async void Update(ObjetoPostalModel objeto) { await…
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answer17
viewsWhy doesn’t my Progressbar increase values?
I have an application in Winforms where I have Tasks and in each task I implement statically a value there progressBar, I would just like to know why it does not show this evolution in winForms Ui.…
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answer76
viewsHow to return query results to the Firestore within the Ackground method?
I’m working on a Cookbook app to learn how to use Firebase resources and I’m working on an Activity that should list all recipes already registered by the user. The routines to record data in the…