getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);<body>
<header>...</header>
<section class="main-content">...</section>
<footer>...</footer>
</body>html{
height: 100%;
}
body{
display: flex;
flex-direction: column;
height: 100%;
}
header{
flex: 0 0 auto;
}
.main-content{
flex: 1 0 auto;
}
footer{
flex: 0 0 auto;
}box-shadow: inset 0 0 1px #black;