Toast vs Snackbar vs Alert

Three ways to say "give the user a heads-up"

The action is done and I want to acknowledge it. Which one?

Comparison table

Toast vs Snackbar vs Alert
Pattern	Can carry an action	How long it stays	Blocks the user	Typical use
Toast轻提示	No	Disappears after 2–3s	No	"Saved", "Sent"
Snackbar带操作提示条	Yes (undo / retry)	5–10s	No	"Deleted · Undo"
Alert警示框	Usually	Stays until dismissed	Sometimes (Alert Dialog)	Errors, risks, things to handle

← Swipe to see the full table

轻提示

Hit a button and the notice floats in at the top, disappearing after 3 seconds. It has no buttons — if you need one, you want a Snackbar.

How to decide: Pure confirmation, nothing follows

带操作提示条

Currently: 3

After deleting, a bar with "Undo" slides up from the bottom. The difference from Toast: it has one thing you can click.

How to decide: Tells the user they can change their mind

警示框

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Notice it neither disappears on its own nor collapses — because the user has to deal with it.

How to decide: The kind that cannot be ignored

you just need to confirm successuse a Toast
you want the user to be able to undo what they just diduse a Snackbar
the user has to deal with the problem (something broke, something is at risk)use an Alert (an Alert Dialog when it is severe)

In one line

Toast and Snackbar get mixed up constantly. One question decides it: does the user need to tap anything? If not, it is a Toast.

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