Solvedflutterfire Warnings from the cloud_firestore plugin on Android: uses unchecked or unsafe operations

Steps to Reproduce

  1. Create a new project
  2. Add dependency for cloud_firestore: ^0.8.0
  3. flutter run


registerResGeneratingTask is deprecated, use registerGeneratedResFolders(FileCollection)

And also

Note: /Users/filiph/dev/flutter/.pub-cache/hosted/ uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Note: /Users/filiph/dev/flutter/.pub-cache/hosted/ uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

(And also this, but it's covered by flutter/flutter#18159)

W/Firestore( 5687): (0.6.6-dev) [Firestore]: The behavior for java.util.Date objects stored in Firestore is going to change AND YOUR APP MAY BREAK.
W/Firestore( 5687): To hide this warning and ensure your app does not break, you need to add the following code to your app before calling any other Cloud Firestore methods:
W/Firestore( 5687): 
W/Firestore( 5687): FirebaseFirestore firestore = FirebaseFirestore.getInstance();
W/Firestore( 5687): FirebaseFirestoreSettings settings = new FirebaseFirestoreSettings.Builder()
W/Firestore( 5687):     .setTimestampsInSnapshotsEnabled(true)
W/Firestore( 5687):     .build();
W/Firestore( 5687): firestore.setFirestoreSettings(settings);
W/Firestore( 5687): 
W/Firestore( 5687): With this change, timestamps stored in Cloud Firestore will be read back as objects instead of as system java.util.Date objects. So you will also need to update code expecting a java.util.Date to instead expect a Timestamp. For example:
W/Firestore( 5687): 
W/Firestore( 5687): // Old:
W/Firestore( 5687): java.util.Date date = snapshot.getDate("created_at");
W/Firestore( 5687): // New:
W/Firestore( 5687): Timestamp timestamp = snapshot.getTimestamp("created_at");
W/Firestore( 5687): java.util.Date date = timestamp.toDate();
W/Firestore( 5687): 
W/Firestore( 5687): Please audit all existing usages of java.util.Date when you enable the new behavior. In a future release, the behavior will be changed to the new behavior, so if you do not follow these steps, YOUR APP MAY BREAK.

cc @kroikie @bparrishMines

39 Answers

βœ”οΈAccepted Answer

set: multiDexEnabled true solved for me.


defaultConfig {
       multiDexEnabled true

Other Answers:


Problem persists on cloud_firestore: ^0.13.4

This error went away after flutter pub upgrade in my case.

Persists on cloud_firestore: 0.13.5

flutter: ^1.12.13

multiDexEnabled true does not solve the problem for me.

same issue happens with me
Note: C:\\hosted\\cloud_firestore-0.13.5\android\src\main\java\io\flutter\plugins\firebase\cloudfirestore\ uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

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