You can use my react-native-simple-shadow-view

• This enables almost identical shadow in Android as in iOS
• No need to use elevation, works with the same shadow parameters of iOS (shadowColor, shadowOpacity, shadowRadius, offset, etc.) so you don't need to write platform specific shadow styles
• Can be used with semi-transparent views
• Supported in android 18 and up

I have implemented CardView for react-native with elevation, that support android(All version) and iOS. github.com/Kishanjvaghela/react-native-cardview. Check this out. Its easy to use

Found a cool solution! 😄

Use a LinearGradient at the bottom of the component in a separate empty view.

<TouchableOpacity
     activeOpacity={0.8}
     style={{
         backgroundColor: '#ffffff',
         marginBottom: Platform.OS === 'android' ? 0 : 16,

         //iOS stuff
         shadowOffset: { width: 0, height: 2, },
         shadowColor: 'rgba(0,0,0,0.03)',
         shadowOpacity: 1,
         shadowRadius: 4,
     }}
     onPress={...}
>
    .
    .
    .
    .
</TouchableOpacity>
{Platform.OS === 'android' &&
    <View style={{ marginBottom: 12 }}>
        <LinearGradient
             colors={['rgba(0,0,0,0.05)', 'transparent']}
             style={{
                 left: 0,
                 right: 0,
                 height: 4,
             }}
        />
    </View>
}