![]() As new tools and other APIs become available, Android Studio will notify you with a pop-up, or check for updates by selecting Help > Check for Update. zip file, unpack the ZIP, copy the android-studio folder into your Program Files folder, and then open the android-studio > bin folder and launch studio64.exe (for 64-bit machines) or studio.exe (for 32-bit machines).įollow the setup wizard in Android Studio and install any SDK packages that it recommends. ![]() exe file (recommended), double-click to launch it. Download the latest version of Android Studio for Windows. Install Android StudioĪndroid Studio is the official integrated development environment for Google's Android operating system. One APK file contains all the contents of an Android app and is the file that Android-powered devices use to install the app. The Android Studio SDK tools compile your code, data, and resource files into an archive Android package. The most straight-forward way to create a native Android app is using Android Studio with either Java or Kotlin, though it is also possible to use C or C++ for Android development if you have a specific purpose. If you would prefer a cross-platform solution, see Overview of Android development on Windows for a brief summary of some options. are some of the things you can do in the native layer.This guide will get you started using Windows to create native Android applications. Moreover, encryption, need for encrypted and split IO, high-rate media player, parallel processing and neural networks, runtime compression, OpenGL, EGL, 3D rendering, camera real-time processing such as Instagram filters, works directly related to hardware, sensors, etc. If you want to blur a photo, you have to implement the photo blur algorithm in two series for 4 colors, which means, you pay a high price to run the Gaussian algorithm on a large photo, thus, you should also do this in the native layer. If you want to take a photo and upload it to the server, you do not need NDK and you can do it with SDK! But if you want to take 100 photos per second and process them and categorize them according to the photo, you will need C/C++ codes to increase performance. We have a limit for creating a series of Java objects, and so there is a special way to move a byte buffer directly between the native and app layers. ![]() As soon as the memory of the method is restored, the method frame in memory is deleted and everything becomes null or invalid. The objects that are created are also related to that scope, and if we are going to return a Java object to the app, we must create a global object and return that valid object. In other systems, you can create several instances of JavaVM for each system process, while we only have one JavaVM in Android which exists in the “jni.h” file header. This layer prepares two objects for us that are known as “JavaVM” and “JNIEnv” and the type of both of them is a pointer! JNIEnv is given to us as the first parameter of our all method and we are only allowed to use it only in the scope of that method and thread, which means we can not move JNIEnv between the threads and if we have to, we must pass it the JavaVM object. We can invoke a Java method in the Java class, handle the exception and make a new exception, work with the class loader and check their type at runtime! This model helps us to write this layer only once and run it on each JVM model(like ART in Android). But what is the role of the JNI? Actually, this is a Java power gun and helps us to create and update Java objects in C/C++ codes and even change them dynamically. We use Java and Kotlin in Android, Java is an independent language and Kotlin runs on a Java virtual machine! So practically our codes are finally executed on Java Virtual Machine. It does not matter if these programs run on our servers or on mobile phones! For example, we have an engineer in Spotify who only does this job and works as an engineer with the title C++ and Java Engineer and writes modules that are injected in different systems! ( I will write about this engineering model used by Telegram and Spotify later). ![]() The first thing we need to talk about is the Java Native Interface, which lies between the code written in Java/Kotlin and the code written in C/C++ which is an interface to interact with the native layer. ![]() Android Platform Architecture( source) Java Native Interface(JNI) ![]()
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