That means its sub elements will be arranged one below the other. You can see that there is a LinearLayout which shows elements in the interface one after another. This is the XML file that describes the user interface of app. Now add add contents to the files as follows. So first create files and directories in the following structure: myapp On the other hand it will be the best idea for starting to learn Android app development from zero. You can make it better with some hard work though. But the app will look ugly and inconsistent across different versions of Android. So can I build an app without AppCompat so that the size of APK will be the least possible? Yes. I figured it out that the additional things in the APK were for the compatibility of material design and other functionalities across all the Android versions. I reverse engineered the APK file and made a deeper look into it. So why such a simple app violates the first two things? It will have low memory consumption, error free performance and very straight forward and consistent UI and UX. The output APK was more than 1 MB and after installation there was an explosion.įrom my experiences a good software product will be comparatively small in size. In every other programming language and platform I have tried (I have tried many, but I’m not an expert) the output of the Hello World was typically very small. When I built my first Android app following such a tutorial I was confused a little bit about the output. The first tutorial will be of course the world famous “Hello World”. Many developers write Android app development tutorials. Posts Build Smallest Android App (6KB) From Scratchīuild Smallest Android App? Why? You may ask.
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