JAVASCRIPT

react native backgrunde img

return (
  <ImageBackground source={...} style={{width: '100%', height: '100%'}}>
    <Text>Inside</Text>
  </ImageBackground>
);

add background image react native

return (
  <ImageBackground source={...} style={{width: '100%', height: '100%'}}>
    ......All Children tags
  </ImageBackground>
);

add backgorund image in react native app

<Image source={require('image!egg')} style={styles.backgroundImage} />

add backgorund image in react native app

React Native Image Background