How do I fix network on main thread exception?
Solutions. The solution is to completely wrap any task that attempts to perform actions like download files, connect to remote MySQL database, perform HTTP requests or establish a socket connection into a separate async function.
What is Network on main thread Exception?
android.os.NetworkOnMainThreadException. The exception that is thrown when an application attempts to perform a networking operation on its main thread. This is only thrown for applications targeting the Honeycomb SDK or higher.
Why should you not perform a network operation on the main thread?
To keep your application responsive, it is essential to avoid using the main thread to perform any operation that may end up keeping it blocked. When they are called in the main thread, they are called synchronously, which means that the UI will remain completely unresponsive until the operation completes.
What exception is thrown when connecting to the Internet on the UI thread?
When time-consuming actions are performed on the UI thread, it blocks the entire User Interface. A NetworkOnMainThreadException is thrown when an app attempts to perform networking operations on the main thread. The error appears on all applications targeting Honeycomb SDK or higher.
How do I run async tasks on Android?
- doInBackground() : This method contains the code which needs to be executed in background.
- onPreExecute() : This method contains the code which is executed before the background processing starts.
- onPostExecute() : This method is called after doInBackground method completes processing.
Why the network operation should be start in the separate thread in Android networking application?
The single-thread model ensures that the UI is not modified by different threads at the same time. So, if we have to update the ImageView with an image from the network, the worker thread will perform the network operation in a separate thread, while the ImageView will be updated by the UI thread.
Does android service run on main thread?
Caution: A service runs in the main thread of its hosting process; the service does not create its own thread and does not run in a separate process unless you specify otherwise. You should run any blocking operations on a separate thread within the service to avoid Application Not Responding (ANR) errors.
What is the difference between thread and handler thread in android?
The main difference between Handler and Thread is that a handler is a function or a method that is capable of performing a specific task while a thread is a small, lightweight execution unit within a process.
How do I get Internet permission on Android?
- Double click on the manifest to show it on the editor.
- Click on the permissions tab below the manifest editor.
- Click on Add button.
- on the dialog that appears Click uses permission. (
- Notice the view that appears on the rigth side Select “android.permission.INTERNET”
- Then a series of Ok and finally save.
What thread services work on Android?
In Android, a Service is an application component that can perform long-running operations in the background on the UI thread.
Why we use async task in Android?
In Android, AsyncTask (Asynchronous Task) allows us to run the instruction in the background and then synchronize again with our main thread. This class will override at least one method i.e doInBackground(Params) and most often will override second method onPostExecute(Result).