Using the Android Virtual Device offers a wide variety of virtual devices that can be emulated. With React Native, you can choose to test run your app either on an emulator or on a physical device.Languages differences: Javascript, Typescript vs Dart in dev mode, Dart supports hot reloading, but it comes also with type-checking and autocomplete benefits.Hot Reloading feature in react native application helps to display the To enable live reload in React Native using Android you need to do the following steps: Open you emulator Execute your application (react-native run-android) Make sure that you application is running Click on emulator and press: CTRL + M.An emulator is a virtual device that lets you test your app without owning an actual device. Your will see your app will be running in your emulator, if you want to reload the project, you could double tap R(you should type it very quickly, otherwise it may not reload js) or you can type command+M, then you choose Reload.React Native is a mobile development framework for building cross-platform apps that run and feel truly native on both iOS and Android. In Terminal, in your react native project directory, run 'react-native run-android'. Launch this AVD in emulator.JDK 8 (installation instructions for macOS here and Windows here)Installing Android Studio and Android SDKAndroid Studio is the official IDE for Android application development. PrerequisitesThe following are required in order to run a React Native app on Android: We’ll close with learning how to test run React Native apps created using the Expo CLI and also how to test React Native apps using a tool known as Waldo. After that, we’ll look at how to run an example React Native app on the emulator and on a physical Android device. However, running React Native apps on Android requires some initial setup.In this post, we’ll walk through all the initial setup required to set a suitable development environment. The process can be as simple as connecting your Android device to the computer you use for development and running a command.
Android Emulator React Native On Hot Reload Download The AndroidThe process might take a while, depending on your internet connection. Make sure your computer is connected to the internet, then follow the setup wizard to install all dependencies. The additional files include the Android SDK, platform tools, and emulator. The first time you run Android Studio, it’ll prompt you to install additional files. After that, launch the executable and follow the prompts to complete the installation process.Once you’re done with the installation process, go ahead and start Android Studio. Android Studio is available for macOS, Windows, and Linux.To install Android Studio, download the Android Studio setup file here.Hence, we can proceed to add the Android SDK to our environment variables. You can install JDK 8 using any method you prefer.At this point, we have Android Studio and JDK 8 installed. However, the instructions linked above involve using an executable installer. Below are links to the official download pages and installation instructions for Windows and macOS users:There are multiple ways of installing JDK—for example, using Homebrew on macOS. Alternatively, you can run source ~/.bash_profile or source ~/.zshevn (depending on the type of terminal you have). After that, paste the following code to the file: export ANDROID_HOME=$HOME/Library/Android/sdkExport PATH=$PATH:$ANDROID_HOME/tools/binExport PATH=$PATH:$ANDROID_HOME/platform-toolsTo reload the new configuration, restart your terminal. MacOS SetupFollow these steps to set up environment variables on your macOS computer.Run either sudo nano ~/.bash_profile (for bash) or sudo nano ~/.zshenv (for zsh) to edit your shell configuration file. Best scanner printer combo for macCreating a New Project With React Native CLIOpen a new terminal window or command prompt if you’re on a Windows PC and run the following command: npx react-native init helloReactNativeAfter you hit the enter key, wait for the new project setup to complete. If you already have a project setup, you can skip the section. Open the control panel (in category view), then navigate to Systems and Security → Systems.In the next section, we’ll be creating a new React Native project, which we’ll use to test our setup so far. Before we do that, let’s make sure the device and your computer are able to communicate properly. Running the App on a Physical Android DeviceIn this section, we’ll be running our project on an actual Android device. That is, in a case where your project has a different name. Run the following commands to navigate to the project folder: cd helloReactNativeTIP: Replace helloReactNative with the actual name of your project. The name of the new folder is the same as the name of your project. ![]() EmulatorNow let’s run our app on an emulator using Expo. Once Expo is running, connect your phone, then click on “Run on Android device/emulator” to run your app. To launch AVD Manager from the welcome screen of Android Studio, navigate to Configuration → AVD Manager.Open localhost:19002 on Google Chrome to access the Expo Metro Builder client. Next, let’s try to run the same app on an emulator.We’ll begin with creating a new emulator if we don’t have one set up already.Open AVD Manager by navigating to Tools → AVD Manager in Android Studio. Using an EmulatorAt this point, we’ve been able to complete the initial setup, and we were able to run our app on an Android device. Please accept the prompt to grant ADB access. After that, your app should start up on it. Wait for the emulator to finish booting. Then, open the Expo client in Chrome and click on “Android device/emulator.”TIP: You might need to remove any connected Android device.Expo will start a new instance of an emulator you have preconfigured. Sign up on their website here. It’s easy to use and requires no long configurations.You can try Waldo for free. Waldo is a no-code testing solution for mobile development.
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