When Building against API 28, Proguard Error is observed

[MattWilliams89]

When building against API 28 (targetSDK and compileSDK), the following proguard error is observed.

Warning: com.sothree.slidinguppanel.SlidingUpPanelLayout: can't find referenced method 'int save(int)' in library class android.graphics.Canvas

[alt236]

The issue is caused by this line:

        final int save = canvas.save(Canvas.CLIP_SAVE_FLAG);

CLIP_SAVE_FLAG has been pruned in P, along with the parametarized save() method.

src: https://developer.android.com/sdk/api_diff/28/changes/android.graphics.Canvas

[alt236]

I have a (not very pretty due to reflection) fix here: #922

[Sottti]

As a workaround, this works for me.

-dontwarn com.sothree.**
-keep class com.sothree.**
-keep interface com.sothree.**

[owlstack]

As a workaround, this works for me.

-dontwarn com.sothree.**
-keep class com.sothree.**
-keep interface com.sothree.**

Sorry for ignorant question but where do I put this? In build.gradle? Thanks!

[drivardST]

As a workaround, this works for me.

-dontwarn com.sothree.**
-keep class com.sothree.**
-keep interface com.sothree.**

Sorry for ignorant question but where do I put this? In build.gradle? Thanks!

Put it in your proguard file

[ecexplorer]

I'm curious if anyone else has had luck with quick workarounds while trying to move off of this unmaintained library.
Trying the above progaurd recommendation did not fix the issue for me.
Additionally, the commits referenced by @FatihYalmanbas did work, but failed to render the view onto the expanded layout.
It seems the current way to do this in android is using BottomSheetBehavior (https://developer.android.com/reference/android/support/design/widget/BottomSheetBehavior)

[Chinmay12112]

As a workaround, this works for me.

-dontwarn com.sothree.**
-keep class com.sothree.**
-keep interface com.sothree.**

Sorry for ignorant question but where do I put this? In build.gradle? Thanks!

Put it in your proguard file

Can u help me here I am still getting the error

"

error: cannot find symbol variable CLIP_SAVE_FLAG"
check the file i attached

[drivardST]

The proguard stuff is for the save method, not CLIP_SAVE_FLAG. It's gone, you need to find an alternative.

Read this stack overflow

https://stackoverflow.com/questions/54148443/can-not-find-canvas-variables-in-api-level-28

[JoseGD]

I'm curious if anyone else has had luck with quick workarounds while trying to move off of this unmaintained library.
Trying the above progaurd recommendation did not fix the issue for me.
Additionally, the commits referenced by @FatihYalmanbas did work, but failed to render the view onto the expanded layout.
It seems the current way to do this in android is using BottomSheetBehavior (https://developer.android.com/reference/android/support/design/widget/BottomSheetBehavior)

This quick workaround worked for me:
-dontwarn android.graphics.Canvas