react-native 扫一扫功能，二维码扫描功能开发

1.安装插件

yarn add react-native-smart-barcode

2.关联

react-native link react-native-smart-barcode

3.修改 android/settings.gradle

rootProject.name = \'Example\'
include \':react-native-smart-barcode\'
project(\':react-native-smart-barcode\').projectDir = new File(rootProject.projectDir, \'../node_modules/react- 
native-smart-barcode/android\')

include \':app\'

4.修改 android/app/build.gradle

dependencies {
  compile project(\':react-native-smart-barcode\')
  ...
}

5.修改 android/app/src/main/AndroidManifest.xml

<!-- smart-barcode所需权限 开始-->
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<!-- smart-barcode所需权限 结束-->

6.修改 android/app/src/main/java/com/example/MainApplication.java

import com.reactnativecomponent.barcode.RCTCapturePackage;

new RCTCapturePackage(),

.