Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available

Question

I tried using OkHttp and Picasso (following this answer) for disk caching of images that I was downloading from Firebase storage. Now, the app gives exceptions and crashes.

Answer 1

For me this problem was solved by Disable Instant Run

Just go to Preferences -> Build, Execution, Deployment -> Instant Run -> Disable the option

And restart the app

Answer 2

Try removing .gradle folder from project.

Answer 3

I've also had this problem, and it's still not possible to turn off the instant run.Later, I found that I deleted all the files under the build-cache folder, and then clean the project.My directory is C:\Users\ HDB . Android \ built-cache.I hope I can help other people who encounter this bug.

Answer 4

This error also occurs because of the differences in libraries' version specification that can lead to runtime errors. Always use same versions of libraries in build.gradle.
For example:

Use this:

implementation 'com.google.android.gms:play-services-location:11.6.0'
implementation 'com.google.android.gms:play-services-auth:11.6.0'

Instead of:

implementation 'com.google.android.gms:play-services-location:15.0.0'
implementation 'com.google.android.gms:play-services-auth:11.6.0'

Answer 5

In Android Studio 2.3 and higher, There is Instant Run which may affect your code.

Disable Instant Run

File -> Settings -> Build, Execution, Deployment -> Instant Run

In my case it was working perfect when run from Android Studio but crashing when install from other sources