Android代码-支持库Snackbars的Builder模式，使它们更容易定制和使用

SnackbarBuilder The Android Design Support library introduced the Snackbar. SnackbarBuilder provides a builder pattern that not only makes Snackbars easier to create, but it also provides some extra customisations. One of the main annoyances with the Snackbar is that it has a dark background, but takes the default text color from your theme, which is often dark as well. This makes the messages hard to read and requires you to retrieve the TextView yourself and change the text color. Snac