@RunWith(RobolectricTestRunner.class)
public class MyActivityTest {

  @Test
  public void clickingButton_shouldChangeResultsViewText() throws Exception {
    MyActivity activity = Robolectric.setupActivity(MyActivity.class);

    Button button = (Button) activity.findViewById(R.id.button);
    TextView results = (TextView) activity.findViewById(R.id.results);

    button.performClick();
    assertThat(results.getText().toString()).isEqualTo("Robolectric Rocks!");
  }
}

To configure robolectric add @Config annotation to test class or method.

Run with custom Application class

@RunWith(RobolectricTestRunner.class)
@Config(application = MyApplication.class)
public final class MyTest {
}

Set target SDK

@RunWith(RobolectricTestRunner.class)
@Config(sdk = Build.VERSION_CODES.LOLLIPOP)
public final class MyTest {
}

Run with custom manifest

When specified, robolectric will look relative to the current directory. Default value is AndroidManifest.xml

Resources and assets will be loaded relative to the manifest.

@RunWith(RobolectricTestRunner.class)
@Config(manifest = "path/AndroidManifest.xml")
public final class MyTest {
}

Use qualifiers

Possible qualifiers can be found in android docs.

@RunWith(RobolectricTestRunner.class)
public final class MyTest {

    @Config(qualifiers = "sw600dp")
    public void testForTablet() {
    }
}