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React Native: how to make View inside ImageBackground have 100% width but with horizontal padding?

I have the following screen in my React Native app: enter image description here

The blue black and white background is an ImageBackground, and the green strip in the middle is a View. The code is:

<ImageBackground
  source={require('@images/login-background.jpg')}
  style={{
    flex: 1,
    width: '100%',
    resizeMode: 'cover',
    justifyContent: 'center',
  }}
>
  <View style={{
    width: '100%',
    backgroundColor: 'green',
    borderRadius: 15,
    padding: 15
  }}/>
  </ImageBackground>

I want there to be 15px of padding at the left and right edges of the green View. If the ImageBackground were a View I would've added 15px of padding to it, but when it's an ImageBackground that results in this:

enter image description here

Conversely, if I add margin: 15px to the green View, I get this:

enter image description here

How should I approach this, to make it look like this?

enter image description here

Solution

  • You can achieve the above requirement using Dimensions in React-Native

    import React from "react";
import { ImageBackground, View, Dimensions } from "react-native";

const screenWidth = Dimensions.get('window').width;

export default App = () => (
    <ImageBackground
        source={{ uri: "https://reactjs.org/logo-og.png" }}
        style={{
            flex: 1,
            width: '100%',
            resizeMode: 'cover',
            justifyContent: 'center',
            alignItems: 'center'
        }}>
        <View style={{
            width: screenWidth - 30,
            backgroundColor: 'green',
            borderRadius: 15,
            padding: 15
        }} />
    </ImageBackground>
);

    Hope this helps you. Feel free for doubts.