image pixel size in react native code example

Example 1: resize image react native

image : {
		width      : null,
		resizeMode : 'contain',
		height     : 220
	}

Example 2: react native image when jpeg not fit to container

<Image  style={{    alignSelf: 'center',    height: 150,    width: 150,    borderWidth: 1,    borderRadius: 75  }}  source={{uri:'https://facebook.github.io/react/img/logo_og.png'}}  resizeMode="stretch"/>