Your free and paid apps, at a minimum, may need only an AndroidManifest.xml file and a few resources (e.g., an application icon that distinguishes free from paid). That test can be made within a custom Application-derived object defined in the library project the package name can be obtained there by calling getPackageName(). Since separate apps on Android must each have a different package name, the easiest way to configure separate behavior is to test that package name in your library to see if it is presently running within the free or the paid version. Although I haven't tried releasing code based on this to Google Play, I've created separate apps which can both run at the same time on a test device, with their own icons. I've attempted this recently and it seems to work very well. IMO your best approach to creating multiple app releases from a single source is to use a library project. As of this writing, the Gradle build tool is still in beta state, so hopefully this will get added in the final release. However, one feature that is still missing is the ability to do conditional compiling in the source itself. The build system will create paid and free APKs for you. In short, you can structure your source like this: /src/main/Īll the shared code reside in /src/main, paid code in /src/paid and free code in /src/free. See Android Tools website for topic on 'Build Variants'. Update May 2013: The new Android build system based on Gradle makes building paid and free APK slightly easier. How to setup prebop is another topic altogther, it's complicated but worth it to have a single codebase. The above code will get removed, if the ant target you are building does not have the variable paid_version defined. You can add something in the code like this: /* $if paid_version$ */ However, there are some Ant tasks that can do this, e.g. One way to do this is with conditional compilation, which again, Java does not support. The free version will have critical methods/classes disabled, so that no one can tinker with database or xml to enable full functionality of the app. Ideally you should have one codebase, and able to compile a paid or free version at will. So users can know how much memory they can use safely and make sure user's progames and data can be safely preserved on disk.IMHO, Java/Android does not make it easy in this scenario. When the app starts it can ask that much to opeartion system for use. Let users to choose how many memory they want. Does free42 still have these limitations? Maybe it can jump more than 1000 steps and remember more locations for program to return.Įmus48 uses a file to simulate memory which a calculator has. Such as GOT function can't jump to subroutines more than 1000 steps and for RTN fucntion Hp-42s can remember up to 8 pending return locations. Hp-42s has some limitation for it's programes. Since free42 uses C++ runtime system to manage memory. Probably before you hit the absolute limit, the performance of your computer/phone/tablet will start to suffer. At some point you'll hit a limit, but it's difficult to predict where that limit would be. Unfortunately, wanting to know this for Free42 is sort of like wanting to know how many pages you can type into Microsoft Word, or how many tabs you can open in your web browser. The HP-42S fimrware managed it very closely, and always knew exactly how much unused RAM was present. Free42 on a computer/phone/tablet works nothing at all like the HP-42S, which had exactly 8192 bytes of RAM (unless you cracked it open and put in more). Quote:How many memory of free42's can be used safely? In the latter case, usually more than is immediately needed is given by the operating system to the runtime system, hence an allocation can actually cause free memory (within the application) to go up. With Free42, the memory is managed by the C++ runtime system, so when memory has to be allocated by the calculator, it may be allocated from memory that the operating system (Windows MacOS, Linux, Android, etc.) has already given to the runtime system, or the runtime system may ask the operating system for more. (03-20-2023 04:11 AM)slabco Wrote: Who can tell the machanics?
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