Material Design

snackbar使用（类似于toast）
Snackbar.make(rootlayout, "Hello SnackBar!", Snackbar.LENGTH_SHORT)
.setAction("Undo", new View.OnClickListener() {
@Override
public void onClick(View v) {
// Perform anything for the action selected
}
})
.setActionTextColor(R.color.material_blue)
.setDuration(4000).show();