React Native Build Issues Android For Mac
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Upgrading a React Native app by creating a new project. The second, the oldest and the best way, for now, is creating a new project in the latest react native version. After that, you should move all the files from the old repo to the one you have just created. ReactNativeClient git:custom-android-editor-styles ❯ react-native run-android info JS server already running. Info Building. I see you are on macOS. But to be honest, I also have a few issues with the Android build environment.
- 2 Why React Native?
Introduction to The Current Technology – React Native includes the basic definition and the main concept behind the origin of the React Native. Let’s get started.
Introduction to The Current Technology – React Native
React Native is a JavaScript Framework which is used to build native mobile apps using JavaScript and React. It uses the same design as React and maintained by Facebook and a community of individual developers and companies.
Like, React it lets you compose complex UIs from small and isolated pieces of code called “components”. It is currently one of the most popular JavaScript frameworks.
React Native is very useful to build Android and IOS Apps.
Why React Native?
One thing that should come in our mind is that Cross-platform frameworks like Cordova, PhoneGap, IONIC, and more were already in the industry to build Hybrid apps then why React Native?
To answer this just think what if you could create Cross-Platform Native Mobile Apps using the single JavaScript framework? Amazing Right?
This is the beauty of React Native. With React Native, you don’t build a “mobile web app”, an “HTML5 app”, or a “hybrid app”. You build a real mobile app that’s indistinguishable from an app built using Objective-C or Java.
It uses the same fundamental UI building blocks as regular iOS and Android apps. You just put those building blocks together using JavaScript and React.
Native Code Integration
You can also add your Native components in React Native which are written in Objective-C, Java, or Swift. It lets you integrate your already written code in React Native and you can further develop the application using React Native.
If you want to optimize a few aspects of your application you can write those sections in Native code and can integrate with React Native App easily. It’s also easy to build part of your app in React Native, and part of your app using the native code directly. Facebook application is the best example of this.
React Native is a component-based language and everything in React Native is a component. For example, one could make a <SocialPost >
component that would display a Post heading, Image, Description, comments, the user can submit the comment etc — all just by including one line of code: <SocialPost ></SocialPost>
.
The biggest advantage of using components is that you can change any component at any point in time without affecting the rest of the applications. This feature is most effective when implemented with larger applications where data changes frequently.
When we update or change any data, React Native automatically updates the specific component whose state has actually changed. This saves from the task of reloading the whole application to reflect the changes.
Example of the Single Screen with Text using React Native is
We hope we were able to explain what is React Native and why you should use it to develop the Mobile Applications.
If you still have any doubt about the topic you can comment below or contact us here.
Hope you liked it 🙂
- React Native Tutorial
- Core Concepts
- Components and APIs
- React Native Useful Resources
- Selected Reading
There are a couple of things you need to install to set up the environment for React Native. We will use OSX as our building platform.
Sr.No. | Software | Description |
---|---|---|
1 | NodeJS and NPM | You can follow our NodeJS Environment Setup tutorial to install NodeJS. |
Step 1: Install create-react-native-app
After installing NodeJS and NPM successfully in your system you can proceed with installation of create-react-native-app (globally as shown below).
Step 2: Create project
Browse through required folder and create a new react native project as shown below.
After executing the above command, a folder with specifies name is created with the following contents.
Step 3: NodeJS Python Jdk8
Make sure you have Python NodeJS and jdk8 installed in your system if not, install them. In addition to these it is recommended to install latest version of yarn to avoid certain issues.
Step 4: Install React Native CLI
You can install react native command line interface on npm, using the install -g react-native-cli command as shown below.
Step 5: Start react native
To verify the installation browse through the project folder and try starting the project using the start command.
If everything went well you will get a QR code as shown below.
As instructed, one way to run react native apps on your android devise is to using expo. Install expo client in your android devise and scan the above obtained QR code.
Step 6: Eject the project
If you want to run android emulator using android studio, come out of the current command line by pressing ctrl+c.
Then, execute run eject command as
This prompts you options to eject, select the first one using arrows and press enter.
Then, you should suggest the name of the app on home screen and project name of the Android studio and Xcode projects.
Though your project ejected successfully, you may get an error as −
Ignore this error and run react native for android using the following command −
But, before that you need to install android studio.
Step 7: Installing Android Studio
Visit the web page https://developer.android.com/studio/ and download android studio.
After downloading the installation file of it, double click on it and proceed with the installation.
Step 8: Configuring AVD Manager
To configure the AVD Manager click on the respective icon in the menu bar.
Step 9: Configuring AVD Manager
Choose a device definition, Nexus 5X is suggestable.
Click on the Next button you will see a System Image window. Select the x86 Images tab.
Then, select Marshmallow and click on next.
Finally, click on the Finish button to finish the AVD configuration.
After configuring your virtual device click on the play button under the Actions column to start your android emulator.
Step 10: Running android
Open command prompt, browse through your project folder and, execute the react-native run-android command.
Then, your app execution begins in another prompt you can see its status.
In your android emulator you can see the execution of the default app as −
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Step 11: local.properties
Open the android folder in your project folder SampleReactNative/android (in this case). Create a file with named local.properties and add the following path in it.
here, replace Tutorialspoint with your user name.
Step 12: Hot Reloading
And to build application modify the App.js and the changes will be automatically updated on the android emulator.
If not, click on the android emulator press ctrl+m then, select Enable Hot Reloading option.