Proguard rules not working with v3.7.1 Android

[Wesley Ellis]

The proguard rules that were previously suggested in https://groups.google.com/forum/#!searchin/ima-sdk/progaurd%7Csort:relevance/ima-sdk/yH7xkhuvHdA/9_h7BMskF2IJ are no longer working and are causing a Assertion Error when running a release build. Do you have any new rules? In the release notes for 3.7.1 it said some classes were moved to com.google, could this be it?

//No longer working in v3.7.1

-keep class com.google.ads.interactivemedia.** { *; }

-keep interface com.google.ads.interactivemedia.** { *; }

java.lang.AssertionError

                                         at com.google.obf.fk$a.<init>(IMASDK:17)

                                         at com.google.obf.fk$11.a(IMASDK:7)

                                         at com.google.obf.do.a(IMASDK:89)

                                         at com.google.obf.fi.write(IMASDK:10)

                                         at com.google.obf.fd$a.write(IMASDK:1041)

                                         at com.google.obf.do.a(IMASDK:11133)

                                         at com.google.obf.gs.b(IMASDK:15029)

                                         at com.google.obf.gs.b(IMASDK:273)

                                         at com.google.obf.gs.a(IMASDK:10090)

                                         at com.google.obf.gt$1.shouldOverrideUrlLoading(IMASDK:1039)

                                         at android.webkit.WebViewClient.shouldOverrideUrlLoading(WebViewClient.java:73)

                                         at com.android.webview.chromium.WebViewContentsClientAdapter.shouldOverrideUrlLoading(WebViewContentsClientAdapter.java:353)

                                         at org.chromium.android_webview.AwContentsClient.shouldIgnoreNavigation(AwContentsClient.java:168)

                                         at org.chromium.android_webview.AwContentsClientBridge.shouldOverrideUrlLoading(AwContentsClientBridge.java:269)

                                         at org.chromium.base.SystemMessageHandler.nativeDoRunLoopOnce(Native Method)

                                         at org.chromium.base.SystemMessageHandler.handleMessage(SystemMessageHandler.java:41)

                                         at android.os.Handler.dispatchMessage(Handler.java:102)

                                         at android.os.Looper.loop(Looper.java:154)

                                         at android.app.ActivityThread.main(ActivityThread.java:6121)

                                         at java.lang.reflect.Method.invoke(Native Method)

                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)

                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

[Chris Feldman (IMA SDK Team)]

Hi Ellis,

I suggest taking a look at the ProGuard file for our Advanced Example for Android. You should emulate the implementation from that project.

Regards,

Chris Feldman
IMA SDK Team

[Roman Zimmer]

Hey there,

We had the same issue after updating to version 3.7.1.

The following ProGuard config seems to work fine for us:

-keep class com.google.ads.interactivemedia.** { *; }
-keep interface com.google.ads.interactivemedia.** { *; }

// new since 3.7.1
-keep class com.google.obf.** { *; }
-keep interface com.google.obf.** { *; }

Good luck,
Roman

[Oliver Woodman]

Shouldn't IMA be distributed as a aar that includes its own proguard file, so that this happens automatically? It's error prone to rely on apps or other libraries that depend on IMA to figure out what the proguard rules need to be. See https://developer.android.com/studio/projects/android-library.html#aar-contents, in particular the "Library modules may include their own ProGuard configuration file" section.

[Chris Feldman (IMA SDK Team)]

Hi Oliver,

Thank you for your suggestion. I will certainly pass this information along so we can assess whether or not this will be possible for the IMA SDK.

Regards,

Chris Feldman

IMA SDK Team