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androidfirebaseapkfirebase-mlkit

Apk size: Firebase MLKit includes large native library even if not in use

I am using Firebase MLKit in my app, like so FirebaseVision.getInstance().cloudImageLabeler.

I am only using the cloud versions of it. But when I look at the apk, it includes large native libraries from Firebase, 10Mb in total for 4 architectures. This make up 80% of my app size. They are named libclassifier_jni.so for each architecture.

Upon further inspection of the libraries extracted from the apk, using objdump -d, I found these are related to on device image labelling. It has symbols like Java_com_google_android_libraries_vision_visionkit_recognition_classifier_NativeClassifier_initialize.

I am sure that I am not using anything Firebase ML on device.

How can I remove these libraries and reduce the size of the apk?

The build is of type release and has proguard rules.

Edit:

Relevant dependencies:

    implementation 'com.google.firebase:firebase-core:17.2.0'
    implementation 'com.google.firebase:firebase-ml-vision:23.0.0'
    implementation 'com.google.firebase:firebase-ml-vision-image-label-model:18.0.0'
    implementation 'com.google.firebase:firebase-auth:19.0.0'
    implementation 'com.google.firebase:firebase-messaging:20.0.0'
    implementation 'com.google.firebase:firebase-functions:19.0.1'

It doesn't make a difference if I update to the latest.

Solution

  • What dependency did you include in your gradle file?

    If you are seeing visionkit then you probably are including com.google.firebase:firebase-ml-vision-object-detection-model or an vision internal sdk by accident.

    The only dependency you need for cloud image labeling is com.google.firebase:firebase-ml-vision