react-native-native-env

React Native Native Environment module can provide environment variables from native to js

Install

You can use rnpm to install native module easily;

``bash
npm install react-native-native-env --save
rnpm link
`

And in Android, you must change the line in MainActivity :

`java
new RCTNativeEnvPackage()
`

to

`java
new RCTNativeEnvPackage(BuildConfig.class)
`

Usage


In js:
`javascript
import NativeEnv from 'react-native-native-env';

NativeEnv.get("APPLICATION_NAME"); // return application's name
NativeEnv.get("VERSION_NAME");// return application's version name
`
Yeah, we hava defined some native variables. These're:

| Key | Source ( Android ) | Source ( iOS ) |
|-----------------:|------------------------------------|----------------------------|
| APPLICATION_ID | BuildConfig.APPLICATION_ID | CFBundleIdentifier |
| APPLICATION_NAME | PackageManager.getApplicationLabel | CFBundleName |
| VERSION_CODE | BuildConfig.VERSION_CODE | CFBundleVersion |
| VERSION_NAME | BuildConfig.VERSION_NAME | CFBundleShortVersionString |
| DEBUG | BuildConfig.DEBUG | #ifdef DEBUG |

Also, you can add some environment variables before react-native runtime is running.

###For Android
Your can send a Map when you init this Module:

`java
HashMap envs = new HashMap();
envs.put("testInfo", "this is a string");
envs.put("testNumber", 23333);
new RCTNativeEnvPackage(BuildConfig.class, envs);
`

And you can add variables from everywhere before it's inited:

`java
RCTNativeEnv.addEnv(key, value);
RCTNativeEnv.addEnvs(map);
`

###For iOS
Your can just add variables from everywhere before react runtime running.

`c
[LRDRCTNativeEnv addEnv:@"test" value:@"info"];
[LRDRCTNativeEnv addEnvs:@{@"testInfo":@"this is a string",@"testNumber":@23333}];
``