an activity diagram, cut into 3 pieces, and then use the rem layout,
< div class= "bg1" > < / div > < div class= "bg2" > < / div > < div class= "bg3" > < / div >
.bg1 {
background:url()
height: 3rem;background-size: cover;
}
then a split line appears on the Android,
I don"t know how people generally do this kind of topic