Unable to use it with Proguard : Failed to create webview

[tgensol]

Hi,

I am unable to use the new version of the plugin with proguard (https://github.com/greybax/cordova-plugin-proguard), I am getting these errors :

Essentially :

Failed to create webview.

Caused by: java.lang.ClassNotFoundException: com.ionicframework.cordova.webview.IonicWebViewEngine

Caused by: java.lang.ClassNotFoundException: Didn't find class "com.ionicframework.cordova.webview.IonicWebViewEngine" on path: DexPathList

The full error :

FATAL EXCEPTION: main Process: com.appchoose.choose.android, PID: 29940 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.appchoose.choose.android/com.appchoose.choose.android.MainActivity}: java.lang.RuntimeException: Failed to create webview. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2911) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6753) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) Caused by: java.lang.RuntimeException: Failed to create webview. at org.apache.cordova.CordovaWebViewImpl.createEngine(SourceFile:82) at org.apache.cordova.CordovaActivity.makeWebViewEngine(SourceFile:206) at org.apache.cordova.CordovaActivity.makeWebView(SourceFile:202) at org.apache.cordova.CordovaActivity.init(SourceFile:146) at org.apache.cordova.CordovaActivity.loadUrl(SourceFile:224) at com.appchoose.choose.android.MainActivity.onCreate(SourceFile:39) at android.app.Activity.performCreate(Activity.java:7041) at android.app.Activity.performCreate(Activity.java:7032) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1231) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)  at android.app.ActivityThread.-wrap11(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:164)  at android.app.ActivityThread.main(ActivityThread.java:6753)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)  Caused by: java.lang.ClassNotFoundException: com.ionicframework.cordova.webview.IonicWebViewEngine at java.lang.Class.classForName(Native Method) at java.lang.Class.forName(Class.java:453) at java.lang.Class.forName(Class.java:378) at org.apache.cordova.CordovaWebViewImpl.createEngine(SourceFile:78) at org.apache.cordova.CordovaActivity.makeWebViewEngine(SourceFile:206)  at org.apache.cordova.CordovaActivity.makeWebView(SourceFile:202)  at org.apache.cordova.CordovaActivity.init(SourceFile:146)  at org.apache.cordova.CordovaActivity.loadUrl(SourceFile:224)  at com.appchoose.choose.android.MainActivity.onCreate(SourceFile:39)  at android.app.Activity.performCreate(Activity.java:7041)  at android.app.Activity.performCreate(Activity.java:7032)  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1231)  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864)  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)  at android.app.ActivityThread.-wrap11(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:164)  at android.app.ActivityThread.main(ActivityThread.java:6753)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)  Caused by: java.lang.ClassNotFoundException: Didn't find class "com.ionicframework.cordova.webview.IonicWebViewEngine" on path: DexPathList[[zip file "/data/app/com.appchoose.choose.android-7glRNVCGqqGYr_EEwzarBA==/base.apk"],nativeLibraryDirectories=[/data/app/com.appchoose.choose.android-7glRNVCGqqGYr_EEwzarBA==/lib/arm64, /data/app/com.appchoose.choose.android-7glRNVCGqqGYr_EEwzarBA==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125) at java.lang.ClassLoader.loadClass(ClassLoader.java:379) at java.lang.ClassLoader.loadClass(ClassLoader.java:312) at java.lang.Class.classForName(Native Method)  at java.lang.Class.forName(Class.java:453)  at java.lang.Class.forName(Class.java:378)  at org.apache.cordova.CordovaWebViewImpl.createEngine(SourceFile:78)  at org.apache.cordova.CordovaActivity.makeWebViewEngine(SourceFile:206)  at org.apache.cordova.CordovaActivity.makeWebView(SourceFile:202)  at org.apache.cordova.CordovaActivity.init(SourceFile:146)  at org.apache.cordova.CordovaActivity.loadUrl(SourceFile:224)  at com.appchoose.choose.android.MainActivity.onCreate(SourceFile:39)  at android.app.Activity.performCreate(Activity.java:7041)  at android.app.Activity.performCreate(Activity.java:7032)  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1231)  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864)  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)  at android.app.ActivityThread.-wrap11(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:164)  at android.app.ActivityThread.main(ActivityThread.java:6753)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)  E/UncaughtException: java.lang.RuntimeException: Unable to start activity ComponentInfo{com.appchoose.choose.android/com.appchoose.choose.android.MainActivity}: java.lang.RuntimeException: Failed to create webview. at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2911) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989) at android.app.ActivityThread.-wrap11(Unknown Source:0) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688) at android.os.Handler.dispatchMessage(Handler.java:106) at android.os.Looper.loop(Looper.java:164) at android.app.ActivityThread.main(ActivityThread.java:6753) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807) Caused by: java.lang.RuntimeException: Failed to create webview. at org.apache.cordova.CordovaWebViewImpl.createEngine(SourceFile:82) at org.apache.cordova.CordovaActivity.makeWebViewEngine(SourceFile:206) at org.apache.cordova.CordovaActivity.makeWebView(SourceFile:202) at org.apache.cordova.CordovaActivity.init(SourceFile:146) at org.apache.cordova.CordovaActivity.loadUrl(SourceFile:224) at com.appchoose.choose.android.MainActivity.onCreate(SourceFile:39) at android.app.Activity.performCreate(Activity.java:7041) at android.app.Activity.performCreate(Activity.java:7032) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1231) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)  at android.app.ActivityThread.-wrap11(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:164)  at android.app.ActivityThread.main(ActivityThread.java:6753)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)  Caused by: java.lang.ClassNotFoundException: com.ionicframework.cordova.webview.IonicWebViewEngine at java.lang.Class.classForName(Native Method) at java.lang.Class.forName(Class.java:453) at java.lang.Class.forName(Class.java:378) at org.apache.cordova.CordovaWebViewImpl.createEngine(SourceFile:78) at org.apache.cordova.CordovaActivity.makeWebViewEngine(SourceFile:206)  at org.apache.cordova.CordovaActivity.makeWebView(SourceFile:202)  at org.apache.cordova.CordovaActivity.init(SourceFile:146)  at org.apache.cordova.CordovaActivity.loadUrl(SourceFile:224)  at com.appchoose.choose.android.MainActivity.onCreate(SourceFile:39)  at android.app.Activity.performCreate(Activity.java:7041)  at android.app.Activity.performCreate(Activity.java:7032)  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1231)  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864)  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2989)  at android.app.ActivityThread.-wrap11(Unknown Source:0)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1688)  at android.os.Handler.dispatchMessage(Handler.java:106)  at android.os.Looper.loop(Looper.java:164)  at android.app.ActivityThread.main(ActivityThread.java:6753)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:482)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)  Caused by: java.lang.ClassNotFoundException: Didn't find class "com.ionicframework.cordova.webview.IonicWebViewEngine" on path: DexPathList[[zip file "/data/app/com.appchoose.choose.android-7glRNVCGqqGYr_EEwzarBA==/base.apk"],nativeLibraryDirectories=[/data/app/com.appchoose.choose.android-7glRNVCGqqGYr_EEwzarBA==/lib/arm64, /data/app/com.appchoose.choose.android-7glRNVCGqqGYr_EEwzarBA==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]] at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:125) at java.lang.ClassLoader.loadClass(ClassLoader.java:379) at java.lang.ClassLoader.loadClass(ClassLoader.java:312)

Without the proguard plugin it is working just fine. Maybe I have to add something to my proguard configuration file, or something needs to be changed in the new version of the plugin ?

Thanking you in advance,
Best

[AadityaDev]

You need to add these lines in proguard rules

-keep class com.ionicframework.cordova.webview.** { ; }
-keep class com.ionicframework.cordova.webview.*