Known issues
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Android issues
- For bundled Language ID, the app may crash when upgrading to AGP 7.0.0 or later.
To avoid the crash in
com.google.mlkit:language-id:16.1.1 or earlier, include the rule below:
-keep class com.google.mlkit.nl.languageid.internal.LanguageIdentificationJni { *; }
To avoid the crash in com.google.mlkit:language-id:17.0.0 or com.google.mlkit:language-id:17.0.1, include the rule below:
-keep class com.google.mlkit.nl.languageid.internal.ThickLanguageIdentifier { *; }
- InputImage constructed by Bitmap with a non zero rotationDegrees causes an "invalid rotation"
MlKitException for FaceDetection API since
com.google.mlkit:face-detection:16.0.5
and com.google.android.gms:play-services-mlkit-barcode-scanning:16.1.4. Please use an earlier
version and wait for our next release which includes the fix for this issue.
BarcodeScanning SDKs pior to com.google.mlkit:barcode-scanning:16.1.0
and com.google.android.gms:play-services-mlkit-barcode-scanning:16.1.3
do not work on some devices running with camera-camera2:1.0.0-beta08 version or later.
You can use an earlier version of camera-camera2 to bypass this issue. For example:
implementation "androidx.camera:camera-core:1.0.0-beta07"
implementation "androidx.camera:camera-camera2:1.0.0-beta07"
implementation "androidx.camera:camera-view:1.0.0-alpha14"
implementation "androidx.camera:camera-extensions:1.0.0-alpha14"
implementation "androidx.camera:camera-lifecycle:1.0.0-beta07"
Native methods might be obfuscated by custom rules in com.google.mlkit:language-id:16.1.1 or earlier.
Include the following rule to keep them if you encounter errors like java.lang.UnsatisfiedLinkError:
-keepclasseswithmembernames class com.google.mlkit.nl.languageid.internal.LanguageIdentificationJni {
native <methods>;
}For the Text Recognition, Image Labeling, and Object Detection and
Tracking APIs, the performance with CameraX and Camera2 is still not on par
with Camera1, because it takes more time to do format conversion for image
from CameraX and Camera2.
Task
callbacks might execute after the Activity or Fragment in which they have been
registered has been destroyed. This might lead to an exception if the callback
tries to access a detector that has been closed in the meantime. If you are
using ML Kit in an Activity, you can register an
Activity-scoped listener,
which is automatically removed when the Activity is stopped. If you are
using ML Kit in a Fragment or other environment, you can provide a custom
executor that shuts down execution when the Fragment is destroyed. See
ScopedExecutor.Java in the Vision Quickstart for an
example.
For Image Labeling with image formats other than Bitmap, bundled variant
has better performance than "thin" variant that depends on Google Play Services.
For Digital Ink com.google.mlkit:digital-ink-recognition:17.0.0 or earlier
and Entity Extraction com.google.mlkit:entity-extraction:16.0.0-beta2 or earlier,
you will get the following runtime exception if you set targetSdkVersion to 31
and run on Android S.
Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
AndroidRuntime: Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.
This issue is fixed in our more recent releases.
If you prefer using older versions, you can either set targetSdkVersion to
less than 31 or add the following to your build.gradle as a workaround.
// For apps targeting Android S+, add the following
constraints {
implementation 'androidx.work:work-runtime:2.7.0-alpha04'
}
iOS issues
- Simulators on M1-based Mac are not supported.
- X86_64 simulator is not supported for Translation
'GoogleMLKit/Translate', '4.0.0' or later and Smart Reply 'GoogleMLKit/SmartReply', '4.0.0' or later.
Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4.0 License, and code samples are licensed under the Apache 2.0 License. For details, see the Google Developers Site Policies. Java is a registered trademark of Oracle and/or its affiliates.
Last updated 2025-08-29 UTC.
[null,null,["Last updated 2025-08-29 UTC."],[[["\u003cp\u003eUpgrading to AGP 7.0.0+ with bundled Language ID may cause crashes, requiring specific keep rules to be added for different versions.\u003c/p\u003e\n"],["\u003cp\u003eInputImage created with Bitmap and rotationDegrees may cause errors with FaceDetection API in specific versions; use earlier versions or await a fix.\u003c/p\u003e\n"],["\u003cp\u003eBarcodeScanning SDKs before 16.1.0/16.1.3 have compatibility issues with camera-camera2:1.0.0-beta08+, consider using earlier camera-camera2 versions.\u003c/p\u003e\n"],["\u003cp\u003eTask callbacks may execute after Activity/Fragment destruction, potentially causing exceptions; use Activity-scoped listeners or custom executors for mitigation.\u003c/p\u003e\n"],["\u003cp\u003eOn Android S with targetSdkVersion 31, Digital Ink and Entity Extraction SDKs before specific versions may cause runtime exceptions regarding PendingIntent flags; upgrade to newer SDKs or apply a workaround.\u003c/p\u003e\n"]]],["Key actions and information regarding Android issues include: adding specific `-keep` rules to avoid crashes when using Language ID with AGP 7.0.0 or later; using earlier versions of Face Detection and Barcode Scanning due to \"invalid rotation\" and camera compatibility issues; adding a rule to fix `UnsatisfiedLinkError` with Language ID. Performance with CameraX/Camera2 is not optimized for Text Recognition, Image Labeling, and Object Detection. Activity-scoped listeners can be registered to prevent exceptions with Task callbacks. Setting `targetSdkVersion` or adding constraints to address Digital Ink and Entity Extraction issues.\n"],null,["Android issues\n\n- For bundled Language ID, the app may crash when upgrading to AGP 7.0.0 or later. To avoid the crash in `com.google.mlkit:language-id:16.1.1` or earlier, include the rule below: \n\n ```scdoc\n -keep class com.google.mlkit.nl.languageid.internal.LanguageIdentificationJni { *; }\n ```\n To avoid the crash in `com.google.mlkit:language-id:17.0.0` or `com.google.mlkit:language-id:17.0.1`, include the rule below: \n\n ```scdoc\n -keep class com.google.mlkit.nl.languageid.internal.ThickLanguageIdentifier { *; }\n ```\n- InputImage constructed by Bitmap with a non zero rotationDegrees causes an \"invalid rotation\" MlKitException for FaceDetection API since `com.google.mlkit:face-detection:16.0.5` and `com.google.android.gms:play-services-mlkit-barcode-scanning:16.1.4`. Please use an earlier version and wait for our next release which includes the fix for this issue.\n- BarcodeScanning SDKs pior to `com.google.mlkit:barcode-scanning:16.1.0`\n and `com.google.android.gms:play-services-mlkit-barcode-scanning:16.1.3`\n do not work on some devices running with camera-camera2:1.0.0-beta08 version or later.\n You can use an earlier version of camera-camera2 to bypass this issue. For example:\n\n ```carbon\n implementation \"androidx.camera:camera-core:1.0.0-beta07\"\n implementation \"androidx.camera:camera-camera2:1.0.0-beta07\"\n implementation \"androidx.camera:camera-view:1.0.0-alpha14\"\n implementation \"androidx.camera:camera-extensions:1.0.0-alpha14\"\n implementation \"androidx.camera:camera-lifecycle:1.0.0-beta07\"\n ```\n\n \u003cbr /\u003e\n\n- Native methods might be obfuscated by custom rules in `com.google.mlkit:language-id:16.1.1` or earlier.\n Include the following rule to keep them if you encounter errors like `java.lang.UnsatisfiedLinkError`:\n\n ```text\n -keepclasseswithmembernames class com.google.mlkit.nl.languageid.internal.LanguageIdentificationJni {\n native \u003cmethods\u003e;\n }\n ```\n\n \u003cbr /\u003e\n\n- For the Text Recognition, Image Labeling, and Object Detection and\n Tracking APIs, the performance with CameraX and Camera2 is still not on par\n with Camera1, because it takes more time to do format conversion for image\n from CameraX and Camera2.\n\n- [Task](https://developers.google.com/android/guides/tasks)\n callbacks might execute after the Activity or Fragment in which they have been\n registered has been destroyed. This might lead to an exception if the callback\n tries to access a detector that has been closed in the meantime. If you are\n using ML Kit in an Activity, you can register an\n [Activity-scoped listener](https://developers.google.com/android/guides/tasks#activity-scoped_listeners),\n which is automatically removed when the Activity is stopped. If you are\n using ML Kit in a Fragment or other environment, you can provide a custom\n executor that shuts down execution when the Fragment is destroyed. See\n `ScopedExecutor.Java` in the [Vision Quickstart](https://github.com/googlesamples/mlkit/tree/master/android/vision-quickstart) for an\n example.\n\n- For Image Labeling with image formats other than Bitmap, bundled variant\n has better performance than \"thin\" variant that depends on Google Play Services.\n\n- For Digital Ink `com.google.mlkit:digital-ink-recognition:17.0.0` or earlier\n and Entity Extraction `com.google.mlkit:entity-extraction:16.0.0-beta2` or earlier,\n you will get the following runtime exception if you set `targetSdkVersion` to 31\n and run on Android S.\n\n Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.\n AndroidRuntime: Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be used with inline replies or bubbles.\n\n This issue is fixed in our more recent releases.\n\n \u003cbr /\u003e\n\n If you prefer using older versions, you can either set `targetSdkVersion` to\n less than 31 or add the following to your `build.gradle` as a workaround. \n\n ```carbon\n // For apps targeting Android S+, add the following\n constraints {\n implementation 'androidx.work:work-runtime:2.7.0-alpha04'\n }\n ```\n\n \u003cbr /\u003e\n\niOS issues\n\n- Simulators on M1-based Mac are not supported.\n- X86_64 simulator is not supported for Translation `'GoogleMLKit/Translate', '4.0.0'` or later and Smart Reply `'GoogleMLKit/SmartReply', '4.0.0'` or later."]]
