installation

 npm i --save react-native-router-flux
 npm install 'react-native-form-validator' --save
 npm install react-native-datepicker --save
 npm install react-native-ui-xg --save
  npm install --save react-native-vector-icons
npm i react-native-action-button --save
 react-native link react-native-vector-icons
 npm install react-native-simple-card-view
react-native link react-native-vector-icons
npm install --save react-native-imagepicker
react-native link react-native-image-picker



 <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-feature android:name="android.hardware.camera" android:required="false"/>
    <uses-feature android:name="android.hardware.camera.autofocus" android:required="false"/>