Lists

onData(withItemContent("item: 60"))
    .onChildView(withId(R.id.item_size))
    .perform(click());
onData(withItemContent("item: 60"))
    .onChildView(withId(R.id.item_size))
    .perform(click())

Click

ListView

onData(anything()).inAdapterView(withId(android.R.id.list)).atPosition(0)
    .perform(click());

RecyclerView

onView(ViewMatchers.withId(R.id.recyclerView))
    .perform(RecyclerViewActions.actionOnItemAtPosition(0, click()));

Camera

Espresso is only able to interact with the single app under test. This means that if your app launches another app, your Espresso test code won't be able to interact with the other app at all. Launch the camera (i.e. another app) to take a photo and then return the resulting image to the original app, this becomes problematic.

Dependency

androidTestImplementation 'androidx.test.espresso:espresso-intents:3.2.0'
@Rule
public GrantPermissionRule externalStoragePermissionRule = GrantPermissionRule.grant(Manifest.permission.WRITE_EXTERNAL_STORAGE);

@Rule
public GrantPermissionRule cameraPermissionRule = GrantPermissionRule.grant(Manifest.permission.CAMERA);

@Rule
public IntentsTestRule<StopActivity> intentsRule = new IntentsTestRule<>(StopActivity.class);
Bitmap icon = BitmapFactory.decodeResource(InstrumentationRegistry.getTargetContext().getResources(), R.mipmap.ic_launcher);

Intent resultData = new Intent();
resultData.putExtra("data", icon);
Instrumentation.ActivityResult result = new Instrumentation.ActivityResult(Activity.RESULT_OK, resultData);

intending(toPackage("com.android.gallery")).respondWith(result);

Sources

Documentation

developer.android.com/training/testing/espresso

Downloads

espresso-cheat-sheet-2.1.0.pdf