Test apk multidexed won't run on api-19

Question

On my current project our test APK has grown over the 64k method limit. We have multidex enabled, so running tests on a device with API > 19 , gives no problems, but on API 19 the runner can't find classes in the second dex file.

I have tried reducing the androidTestCompile dependencies but the biggest culprit is espresso, which I need.

Are there any work arounds for the dex limit on the test APK running on platforms that don't natively support multidex ?

Possible duplicate of [Android support multidex library implementation](http://stackoverflow.com/questions/26925264/android-support-multidex-library-implementation) — Kristopher Micinski, Aug 26 '16 at 21:11

score 1 · Answer 1 · answered Aug 26 '16 at 15:43

1

Prior to Android L, Dalvik runtime is used for executing app code. To get around it, you can use the multidex support library.

Read more here.

answered Aug 26 '16 at 15:43

RominaV

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1

I have multidex enabled and it works for the main apk I can run the application fine even on Dalvik ,but not the test apk can't run the androidTests – James Muranga Aug 26 '16 at 16:22

score 1 · Answer 2 · answered Aug 26 '16 at 20:51

Create a Java class, which would be your custom testInstrumentationRunner.

Put this code into it:

public class MultiDexAndroidJUnitRunner extends AndroidJUnitRunner {
    @Override
    public void onCreate(Bundle arguments) {
        //To make it work on MultiDex environment.
        //https://plus.google.com/+OleksandrKucherenko/posts/i7qZdVEy3Ue
        MultiDex.install(getTargetContext());

        super.onCreate(arguments);
    }
}

Open your app's build.gradle

Replace existing line:

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

with yours custom class:

testInstrumentationRunner "com.mypackagename.test.MultiDexAndroidJUnitRunner"

Hope it will work

Test apk multidexed won't run on api-19

2 Answers2