AndroidTestRunner that works around the problem with different package name in manifest and R class for Robolectric

AndroidTestRunner.java

package com.myapp.whatever;

import org.junit.runners.model.InitializationError;
import org.robolectric.AndroidManifest;
import org.robolectric.RobolectricTestRunner;
import org.robolectric.res.FsFile;
import com.myapp.R;

public class AndroidTestRunner extends RobolectricTestRunner {
    public AndroidTestRunner(Class<?> testClass) throws InitializationError {
        super(testClass);
    }

    @Override
    protected AndroidManifest createAppManifest(FsFile manifestFile, FsFile resDir, FsFile assetsDir) {
        return new CustomPackageManifest(manifestFile, resDir, assetsDir);
    }

    private static class CustomPackageManifest extends AndroidManifest {
        public CustomPackageManifest(FsFile androidManifestFile, FsFile resDirectory, FsFile assetsDirectory) {
            super(androidManifestFile, resDirectory, assetsDirectory);
        }

        @Override
        public String getRClassName() throws Exception {
            return getRClass().getName();
        }

        @Override
        public Class<?> getRClass() {
            return R.class;
        }

        @Override
        public String getPackageName() {
            return R.class.getPackage().getName();
        }
    }
}