Crash on release build.

[AradiPatrik]

My stacktrace

java_vm_ext.cc:594] JNI DETECTED ERROR IN APPLICATION: java_class == null
java_vm_ext.cc:594]     in call to GetStaticMethodID
java_vm_ext.cc:594]     from void com.aureusapps.android.webpandroid.decoder.WebPDecoder.nativeDecodeFrames(android.content.Context, android.net.Uri, android.net.Uri)

Also

failed to add asset path '/data/app/~~vhlm4eDw8sy8A_FHF1smtA==/my.package.name-OA6BY74EwD9N0TRiWvpPQA==/base.apk' (Ask Studio Bot)
                                                                                                    java.io.IOException: Failed to load asset path /data/app/~~vhlm4eDw8sy8A_FHF1smtA==/my.package.name-OA6BY74EwD9N0TRiWvpPQA==/base.apk
                                                                                                        at android.content.res.ApkAssets.nativeLoad(Native Method)
                                                                                                        at android.content.res.ApkAssets.<init>(ApkAssets.java:296)
                                                                                                        at android.content.res.ApkAssets.loadFromPath(ApkAssets.java:145)
                                                                                                        at android.app.ResourcesManager.loadApkAssets(ResourcesManager.java:472)
                                                                                                        at android.app.ResourcesManager.-$$Nest$mloadApkAssets(Unknown Source:0)
                                                                                                        at android.app.ResourcesManager$ApkAssetsSupplier.load(ResourcesManager.java:167)
                                                                                                        at android.app.ResourcesManager.createAssetManager(ResourcesManager.java:548)
                                                                                                        at android.app.ResourcesManager.createResourcesImpl(ResourcesManager.java:630)
                                                                                                        at android.app.ResourcesManager.findOrCreateResourcesImplForKeyLocked(ResourcesManager.java:682)
                                                                                                        at android.app.ResourcesManager.createResources(ResourcesManager.java:1028)
                                                                                                        at android.app.ResourcesManager.getResources(ResourcesManager.java:1131)
                                                                                                        at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:2467)
                                                                                                        at android.app.ApplicationPackageManager.getResourcesForApplication(ApplicationPackageManager.java:2032)
                                                                                                        at android.app.ApplicationPackageManager.getResourcesForApplication(ApplicationPackageManager.java:2018)
                                                                                                        at android.app.ApplicationPackageManager.getText(ApplicationPackageManager.java:2335)
                                                                                                        at android.content.pm.PackageItemInfo.loadUnsafeLabel(PackageItemInfo.java:222)
                                                                                                        at android.content.pm.PackageItemInfo.loadLabel(PackageItemInfo.java:212)
                                                                                                        at android.app.ApplicationPackageManager.getApplicationLabel(ApplicationPackageManager.java:2380)

I added these lines to my proguard file:

-keep class com.aureusapps.android.webpandroid.decoder.** {*;}
-keep class com.aureusapps.android.webpandroid.decoder.**
-keep class com.aureusapps.android.webpandroid.encoder.** {*;}
-keep class com.aureusapps.android.webpandroid.encoder.**
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecoder {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecoder
-keep class com.aureusapps.android.webpandroid.decoder.WebPInfo {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPInfo
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecodeListener {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecodeListener

This is how I use it (although I don't think it's relevant to my problem)

val decoder = WebPDecoder()
                val encoder = AnimatedGifEncoder()
                encoder.setRepeat(0)
                encoder.start(outputStream)
                suspendCancellableCoroutine { continuation ->
                    decoder.addDecodeListener(object : WebPDecodeListener {
                        var frameCount = AtomicInteger(0)
                        var lastFrameTimestamp = AtomicInteger(0)

                        override fun onFrameDecoded(
                            index: Int,
                            timestamp: Long,
                            bitmap: Bitmap,
                            uri: Uri?
                        ) {
                            encoder.setDelay(timestamp.toInt() - lastFrameTimestamp.get())
                            lastFrameTimestamp.set(timestamp.toInt())
                            encoder.addFrame(transform(bitmap))
                            if (index == frameCount.get() - 1) {
                                encoder.finish()
                                continuation.resume(Unit)
                            }
                        }

                        override fun onInfoDecoded(info: WebPInfo) {
                            frameCount.set(info.frameCount)
                            logcat { info.toString() }
                        }
                    })
                    decoder.decodeFrames(context, currentFile.toUri(), null)
                }

How should I modify my proguard file, or how should I configure the build.gradle to avoid the crash?

[UdaraWanasinghe]

Add these two lines to proguard rules

-keep class com.aureusapps.android.extensions.UriExtensionsKt {*;}
-keep class com.aureusapps.android.extensions.BitmapUtils {*;}

I used some extension functions in com.aureusapps.android.extensions package.

[AradiPatrik]

It didn't work. Same error. Actually I can't even find these classes in my external libraries.

These are the classes included in the library

[AradiPatrik]

My current proguard file:

-keep class com.aureusapps.android.webpandroid.decoder.** {*;}
-keep class com.aureusapps.android.webpandroid.decoder.**
-keep class com.aureusapps.android.webpandroid.encoder.** {*;}
-keep class com.aureusapps.android.webpandroid.encoder.**
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecoder {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecoder
-keep class com.aureusapps.android.webpandroid.decoder.WebPInfo {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPInfo
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecodeListener {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecodeListener
-keep class com.aureusapps.android.extensions.UriExtensionsKt {*;}
-keep class com.aureusapps.android.extensions.BitmapUtils {*;}

[AradiPatrik]

https://github.com/UdaraWanasinghe/webp-android/blob/15b98312fc97c506fa64cb69731953c526f7e976/webp-android/src/main/cpp/bitmap_utils.cpp#L74

can it be that we will have to add these methods to proguard too?

[AradiPatrik]

I added this line to my build.gradle

    implementation("com.aureusapps.android:extensions:1.0.3")

also my proguard looks like this now:

-keep class com.aureusapps.android.webpandroid.decoder.** {*;}
-keep class com.aureusapps.android.webpandroid.decoder.**
-keep class com.aureusapps.android.webpandroid.encoder.** {*;}
-keep class com.aureusapps.android.webpandroid.encoder.**
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecoder {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecoder
-keep class com.aureusapps.android.webpandroid.decoder.WebPInfo {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPInfo
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecodeListener {*;}
-keep class com.aureusapps.android.webpandroid.decoder.WebPDecodeListener
-keep class com.aureusapps.android.extensions.UriExtensionsKt {*;}
-keep class com.aureusapps.android.extensions.BitmapUtils
-keep class com.aureusapps.android.extensions.BitmapUtils {*;}
-keep class android.graphics.Bitmap
-keep class android.graphics.Bitmap {*;}

still the same error

[AradiPatrik]

It worked finally! I added the proguard rules to my main app module and somehow it works now. Maybe my module specific proguard rule wasn't discovered.

Thanks for the help. Also maybe for future releases adding checks after every method like GetStaticMethodId in C++ and providing descriptive error messages will help future integrations.

Thanks again!