#Appium app back button code
The most common reason for app crash in such scenarios is that the intent passed to the called activity is returned null when back key is pressed, and the onActivityResult() has some code which is trying to access the data in the intent. This means you need to put the right code in this method to be able to handle the back press event. changed the CSS back so the button hides correctly. We can then test this button's functionality using Appium. So irrespective of whether the child activity finished as it was designed to, or it finished due to a back press, the control returns to onResult method in calling activity. This will give us a simple app with a button which shows and hides a box below it. What you may not be expecting (at least I did not), that when back key is pressed on an activity which is supposed to return some results, the activity is finished at that point, and the control is returned to the Parent activity inside the onActivityResult() handler. A simple understanding of what happens when back key is pressed on an activity which was called with startActivityForResult(Intent, int, Bundle) will be enough for you to know what you need to fix in your calling activity. The real issue may be in the calling activity rather than the called one. It's when your activity was supposed to return some results via an intent, you may run into issues. If the child activity was called with StartActivity(), you may observe no problems. The activity will be finished by itself, and parent activity will be restored. Two common solutions you may come across are:Ĭopy boolean onKeyDown( int ke圜ode, KeyEvent event) A quick seach on browser leads him/her to developers' forums, and there are often solutions suggested to add a handling method. The developer (being a developer) is bound to feel that he/she needs to handle the back press event to address the issue. So, essentially a developer does not need to do anything to handle back key presses.īut sometimes the app crashes, or the parent activity is not in the same state as it was before. When back key is pressed on an activity in focus, the OS or the system itself issues the finish() call for that activity, allowing the app to return to the calling activity, and ensuring the parent activity is restored in the same state in which it was before the child activity was called. The article is by no means comprehensive on this subject but helps to understand some key points. By understanding some basic concepts, they will easily be able to get rid of these problems, and take total control over their app's behaviour (which should always be the case). Often beginner developers face the problems of apps crashing or other unexpected behaviour when back key is pressed from one of the activities of their app.
#Appium app back button android
It is important for any app developer to have some understanding of what events result out of back key press, how will these be handled by the Android OS and by their app, do they need to add specific handler methods to their code. Back key is frequently used while navigating to different screens (activities for a developer).
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