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rn-config-reader

v5.1.3

Published

Simply access android resources strings and ios info.plist values in JS

Downloads

2,821

Readme

🛠 rn-config-reader npm npm

A native library to access configuration variables from JS code.

based on csath project

For [email protected]+ versions use [email protected]+ (Autolinking support enabled now)

Installation

For rn 0.60+ Auto Linking will do things for you.

If not follow these:

  1. $ npm install rn-config-reader --save or $ yarn add rn-config-reader

  2. $ react-native link rn-config-reader

  3. Go to android/app/src/main/packageName/MainApplication.java and find line

    new RNConfigReaderPackage()

See manual installation below if you have issues with react-native link.

Usage

import RNConfigReader from 'rn-config-reader';

// access any of the defined config variables in andoird build gradle or ios info.plist
const configValue = RNConfigReader.ANY_DEFINED_CONFIG_FIELD;

More examples

Create a string-array item on strings.xml file with the strings variables you want to expose to JS (res/values/strings.xml)

<resources>
    <string-array name="export_variables">
        <item>TEST_CONFIG_FIELD</item>
    </string-array>
    <string name="TEST_CONFIG_FIELD">ConfigValue</string>
</resources>

Create new field inside ios info.plist file

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0"> 
<dict>
  	<key>CFBundleDisplayName</key>
	<string>com.react-native.react-native-config-reader</string>
  
	<key>TEST_CONFIG_FIELD</key>
	<string>"Hello I'm your test config value"</string>
</dict>
</plist>

Now you can acess them inside the JS code

import { Platform } from 'react-native';
import RNConfigReader from 'rn-config-reader';

if(Platform.OS === 'ios') {
  const iosBundleDisplayName = RNConfigReader.CFBundleDisplayName;
  const testConfigValue = RNConfigReader.TEST_CONFIG_FIELD;
}

if(Platform.OS === 'android') {
  const androidApplicationID = RNConfigReader.applicationId;
  const testConfigValue = RNConfigReader.TEST_CONFIG_FIELD;
}

Manual installation

iOS

  1. In XCode, in the project navigator, right click LibrariesAdd Files to [your project's name]
  2. Go to node_modulesreact-native-config-reader and add RNConfigReader.xcodeproj
  3. In XCode, in the project navigator, select your project. Add libRNConfigReader.a to your project's Build PhasesLink Binary With Libraries
  4. Run your project (Cmd+R)<

Android

  1. Open up android/app/src/main/java/[...]/MainApplication.java
  • Add import com.reactlibrary.RNConfigReaderPackage; to the imports at the top of the file
  • Add new RNConfigReaderPackage() to the list returned by the getPackages() method
  1. Append the following lines to android/settings.gradle:
    include ':react-native-config-reader'
    project(':react-native-config-reader').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-config-reader/android')
  2. Insert the following lines inside the dependencies block in android/app/build.gradle:
      compile project(':react-native-config-reader')
Android advanced configurations with Multiple environments

If your app uses an applicationIdSuffix or a different applicationId depending on the build variants, you must append the following line inside the buildTypes block in your android/app/build.gradle file and specify your new package name.

  resValue "string", "rn_config_reader_custom_package", "com.yourNewPackage"

Example

buildTypes {
  ...
  debug {
    ...
    applicationIdSuffix ".dev"
    resValue "string", "rn_config_reader_custom_package", "com.yourNewPackage"
  }
}

Windows (Beta)

Read it!

  1. In Visual Studio add the RNConfigReader.sln in node_modules/react-native-config-reader/windows/RNConfigReader.sln folder to their solution, reference from their app.
  2. Open up your MainPage.cs app
  • Add using Config.Reader.RNConfigReader; to the usings at the top of the file
  • Add new RNConfigReaderPackage() to the List<IReactPackage> returned by the Packages method

Troubleshooting

Problems with Proguard

When Proguard is enabled (which it is by default for Android release builds), it can rename the BuildConfig Java class in the minification process and prevent react-native-config-reader from referencing it. To avoid this, add an exception to android/app/proguard-rules.pro:

-keep class com.yourNewPackage.BuildConfig { *; }

com.yourNewPackage should match the package value in your app/src/main/AndroidManifest.xml file.

If using Dexguard, the shrinking phase will remove resources it thinks are unused. It is necessary to add an exception to preserve the build config package name.

-keepresources string/rn_config_reader_custom_package

License

MIT License

Copyright (c) 2019 Chanaka Athurugiriya