android - java.lang.VerifyError: Verifier rejected class on Lollipop when using release APK

Question

I get this error when I install my release APK on a 5.x device. The error does not occur when I push the same code from Android Studio, or if I run it on a 4.x device.

java.lang.VerifyError: Verifier rejected class com.myapp.android.ui.activity.MainActivity$$ViewInjector due to bad method void com.myapp.android.ui.activity.MainActivity$$ViewInjector.reset(com.myapp.android.ui.activity.MainActivity) (declaration of 'com.myapp.android.ui.activity.MainActivity$$ViewInjector' appears in /data/app/com.myapp.android-2/base.apk)
       at java.lang.Class.classForName(Class.java)
       at java.lang.Class.forName(Class.java:308)
       at java.lang.Class.forName(Class.java:272)
       at butterknife.ButterKnife.findInjectorForClass(ButterKnife.java:298)
       at butterknife.ButterKnife.inject(ButterKnife.java:271)
       at butterknife.ButterKnife.inject(ButterKnife.java:184)
       at com.myapp.android.ui.activity.MyDrawerActivity.onCreate(MyDrawerActivity.java:31)

I inject my Toolbar and a custom NavigationDrawer in the class.

@InjectView(R.id.toolbar) Toolbar mToolbar;
@InjectView(R.id.nav_drawer) MyNavigationDrawer mNavigationDrawer;

Line 31:

ButterKnife.inject(this);

Is there something that would be different with the Butterknife codegen when using gradle assembleRelease? I am not using ProGuard at all.

Here are my other Android build settings:

# Android SDK settings
ANDROID_BUILD_MIN_SDK_VERSION=14
ANDROID_BUILD_TARGET_SDK_VERSION=21
ANDROID_BUILD_SDK_VERSION=21
ANDROID_BUILD_TOOLS_VERSION=21.1.2

Logcat

I/art     (21354): Verification error in void com.myapp.android.ui.activity.MainActivity$$ViewInjector.inject(butterknife.ButterKnife$Finder, com.myapp.android.ui.activity.MainActivity, java.lang.Object)
I/art     (21354): void com.myapp.android.ui.activity.MainActivity$$ViewInjector.inject(butterknife.ButterKnife$Finder, com.myapp.android.ui.activity.MainActivity, java.lang.Object) failed to verify: register v4 has type Reference: com.myapp.android.ui.activity.MainActivity but expected Reference: com.myapp.android.ui.activity.LoggedInNavActivitya.lang.Object): [0x0]
I/art     (21354): Verification error in void com.myapp.android.ui.activity.MainActivity$$ViewInjector.reset(com.myapp.android.ui.activity.MainActivity)
I/art     (21354): void com.myapp.android.ui.activity.MainActivity$$ViewInjector.reset(com.myapp.android.ui.activity.MainActivity) failed to verify: register v1 has type Reference: com.myapp.android.ui.activity.MainActivity but expected Reference: com.myapp.android.ui.activity.LoggedInNavActivity
E/art     (21354): Verification failed on class com.myapp.android.ui.activity.MainActivity$$ViewInjector in /data/app/com.myapp.android-1/base.apk because: Verifier rejected class com.myapp.android.ui.activity.MainActivity$$ViewInjector due to bad method void com.myapp.android.ui.activity.MainActivity$$ViewInjector.reset(com.myapp.android.ui.activity.MainActivity)

Answer 1

Cleaning out the build folder resolved the problem. Not sure why ART had an issue but Dalvik did not.

Running a gradle clean task was not clearing out my build folder all the way. I had to do it manually, but clean may work for some people.