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When i started my Android project i had a misunderstanding that every screen that's shown in the application must be a new activity. Now i am finished with the project , i have checked it on my emulator as well as on a couple of android phones. So far i am not witnessing any problems, but recently i read somewhere that too many activities in the application are a pretty bad idea.
Currently my application has around 15-20 activities.Ideally i heard it should be around 5-6. Do i need to re-structure my code or just finishing every activity after it has done it's part is enough?
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Yes you can. But you should define one as default by CATEGORY_DEFAULT. Without default main activity if you have two activities, Android Market do not know what activity to start.
In Activity [A], on button click, I am calling Activity [B] without finishing Activity [A]. Now in Activity [B], there are two buttons, New and Modify. When the user clicks on modify then pop an activity [A] from the stack with all the options ticked..
An activity represents a single screen with a user interface just like window or frame of Java. Android activity is the subclass of ContextThemeWrapper class. If you have worked with C, C++ or Java programming language then you must have seen that your program starts from main() function.
While creating complex applications you definite need to create many activities. So it depends on your application how many activities you need. No of activities in a project do not affect the performance.
The effect is produced by the number of activities in the stack of your android. So it is better to keep 5-6 activities in the stack(Finish activities if they are not needed any more).
So create as many Activities as your application demands but keep smaller no of Activities open at a time.
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