How to run your first React Native App on macOS for Android devices

#reactnative #beginners #tutorial #programming

I wrote a getting started guide for react-native on macOS and for iOS devices few months ago. Now I thought to write it for android devices as well.

Lets get started...

Step 1: Installing Node and Watchman

Official guide suggests to use Homebrew to install Node and Watchman. So first thing first, run this command to install Homebrew



/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

After brew is installed, run these commands to install Node and Watchman respectively.



brew install node
brew install watchman

Make sure you have 8.3 or newer version of node.

Step 2: Installing Java Development Kit (JDK)

Official guide also recommends to install JDK using Homebrew. Run this command to get this done.



brew install --cask adoptopenjdk/openjdk/adoptopenjdk8

Make sure you install JDK 8 or newer.

Step 3: Setting up android development environment

Download & Install Android Studio

Download and install Android Studio here.
Now choose to install "Custom" setup for installation and make sure to select checkboxes of these options.

Android SDK
Android SDK Platform
Performance (Intel ® HAXM)
Android Virtual Device

Then, click "Next" to install all of these components.

Install the Android SDK

To install the SDK, open the android studio. Click on the configure button on bottom right corner of "Welcome to Android Studio" screen. Then select "SDK Manager".

Select the "SDK Platforms" tab from the SDK Manager, then check the box next to "Show Package Details" in the bottom right corner. Expand the Android 9 (Pie) entry, then make sure to check these:

Android SDK Platform 28
Intel x86 Atom_64 System Image or Google APIs Intel x86 Atom System Image

Next, select the "SDK Tools" tab and check the box next to "Show Package Details" here as well. Look for and expand the "Android SDK Build-Tools" entry, then make sure that 28.0.3 is selected.

Finally, click "Apply" to download and install the Android SDK and related build tools.

Configure the ANDROID_HOME environment variable

The React Native tools require some environment variables to be set up in order to build apps with native code.
For this we need to write some code in $HOME/.bash_profile or $HOME/.bashrc config file.

To create a new .bash_profile file, type cd ~/ in your terminal.
Type touch .bash_profile to create your new file, then type open -e .bash_profile to open your file and add these lines:



export ANDROID_HOME=$HOME/Library/Android/sdk
export PATH=$PATH:$ANDROID_HOME/emulator
export PATH=$PATH:$ANDROID_HOME/tools
export PATH=$PATH:$ANDROID_HOME/tools/bin
export PATH=$PATH:$ANDROID_HOME/platform-tools

Type source $HOME/.bash_profile to load the config into your current shell. Verify that ANDROID_HOME has been added to your path by running echo $PATH.