Resolving java.lang.NoSuchMethodError When Running TensorFlow Lite on Android

Описание: Encountering the `java.lang.NoSuchMethodError` exception while running TensorFlow Lite on Android? This post provides a detailed solution to this common issue, helping you successfully implement your custom TensorFlow Lite model.
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This video is based on the question https://stackoverflow.com/q/69837892/ asked by the user 'George Karageorgiou' ( https://stackoverflow.com/u/17316711/ ) and on the answer https://stackoverflow.com/a/69846812/ provided by the user 'Lu Wang' ( https://stackoverflow.com/u/11031225/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Understanding the java.lang.NoSuchMethodError in TensorFlow Lite

When developing applications using TensorFlow Lite on Android, particularly with the Softbank Robotics’ Pepper 1.8, you may encounter a frustrating error: java.lang.NoSuchMethodError. This error typically indicates that your code is referencing a method that does not exist in the loaded classes, leading to a fatal exception during runtime.

The Problem

In your case, while initializing TensorFlow Lite and trying to run the object detection functionality, the application crashes with the following error message:

[[See Video to Reveal this Text or Code Snippet]]

This message suggests a method, getValue(), from the ColorSpaceType class could not be found, causing the application to crash. The issue is often related to version incompatibility between the TensorFlow Lite libraries you have integrated into your project.

Solution: Updating Dependencies

Identify the Culprit Dependencies

To resolve this issue, you'll need to adjust your project’s dependencies as outlined below:

Remove the conflicting TensorFlow Lite Support library:
The org.tensorflow:tensorflow-lite-support:0.1.0 dependency is outdated. Since org.tensorflow:tensorflow-lite-task-vision:0.0.0-nightly-SNAPSHOT uses a newer version of the support library (0.2.0+ ), this older version can lead to conflicts.

Assess Unused Dependencies:
Additionally, the dependency for org.tensorflow:tensorflow-lite-metadata:0.1.0 is currently unnecessary and can also be removed. This helps to clean up the project and prevent future issues.

Recommended Modifications to build.gradle

Here’s what your build.gradle dependencies section should resemble after implementing the necessary changes:

[[See Video to Reveal this Text or Code Snippet]]

Rebuild Your Project

After making these changes, ensure you sync your project with the Gradle files and perform a clean rebuild. This will ensure that your application pulls in the updated library versions and resolves any version conflicts.

Conclusion

By following the steps outlined above, you should be able to eliminate the java.lang.NoSuchMethodError exception and run your TensorFlow Lite model on Android without interruptions. Remember to keep your libraries up to date to avoid compatibility issues in the future. Happy coding!