AndroidJUnit4.class is deprecated: How to use androidx.test.ext.junit.runners.AndroidJUnit4?

Question

For my instrumentation tests I was using

@RunWith(AndroidJUnit4.class)

from

import androidx.test.runner.AndroidJUnit4;


        

Answer 1

If you've tried @MarcelGangwisch's solution and your build fails saying it can't find the resource AND you also cleaned/rebuilt your project and it still doesn't work, try this: (based also on @KrzysztofDziuba's solution)

In your gradle file where you changed the dependency, make sure you are adding it as the type you need, ie.:

For UI tests:

androidTestImplementation 'androidx.test.ext:junit:1.1.0'

For Unit tests:

testImplementation 'androidx.test.ext:junit:1.1.0'

In my instance I added it as both and now it works.

Answer 2

1. Include these lines in build.gradle app module.

   testImplementation 'androidx.test.ext:junit:1.1.1' androidTestImplementation 'androidx.test.ext:junit:1.1.1'

2. In the test class replace your test runner to

   import androidx.test.ext.junit.runners.AndroidJUnit4;

3. If InstrumentationRegistry.getTargetContext() is deprecated use InstrumentationRegistry from androidx.test.platform.app like this

   InstrumentationRegistry.getInstrumentation().getTargetContext()