Newbe Dev Stack

Answer : You can use InstrumentationRegistry.getInstrumentation().getTargetContext() in the most cases from androidx.test.platform.app.InstrumentationRegistry . If you need the Application, you can use ApplicationProvider.getApplicationContext<MyAppClass>() . If you haven't already, I think you can also use the new test dependency: androidTestImplementation 'androidx.test:core:1.0.0-beta02' . When you're using Android X you need to make sure you have the following in your app's build.gradle file androidTestImplementation 'androidx.test:core:1.1.0' androidTestImplementation 'androidx.test.ext:junit:1.1.0' The second one is to make sure you have the correct AndroidJUnit4 to use in your tests. Make sure you import both of these. import androidx.test.platform.app.InstrumentationRegistry import androidx.test.ext.junit.runners.AndroidJUnit4 Now instead of using val context = InstrumentationRegistry.getContext() you can use the lin...

Answer : You can either use AmazonS3ClientBuilder or AwsClientBuilder as alternatives. For S3, simplest would be with AmazonS3ClientBuilder, BasicAWSCredentials creds = new BasicAWSCredentials("access_key", "secret_key"); AmazonS3 s3Client = AmazonS3ClientBuilder.standard().withCredentials(new AWSStaticCredentialsProvider(creds)).build(); Use the code listed below to create an S3 client without credentials: AmazonS3 s3Client = AmazonS3ClientBuilder.standard().build(); An usage example would be a lambda function calling S3. You need to pass the region information through the com.amazonaws.regions.Region object. Use AmazonS3Client(credentials, Region.getRegion(Regions.REPLACE_WITH_YOUR_REGION))