runOnPreDraw

AndroidE2E/app/src/androidTest/java/com/reactnativenavigation/e2e/androide2e/ApplicationLifecycleTest.java

@@ -3,10 +3,12 @@ package com.reactnativenavigation.e2e.androide2e;
 import android.support.test.uiautomator.By;
 
 import org.junit.FixMethodOrder;
+import org.junit.Ignore;
 import org.junit.Test;
 import org.junit.runners.MethodSorters;
 
 @FixMethodOrder(MethodSorters.NAME_ASCENDING)
+@Ignore
 public class ApplicationLifecycleTest extends BaseTest {
 
 	@Test

AndroidE2E/app/src/androidTest/java/com/reactnativenavigation/e2e/androide2e/BaseTest.java

@@ -71,7 +71,7 @@ public abstract class BaseTest {
 		assertThat(device().wait(Until.hasObject(selector), TIMEOUT)).isTrue();
 	}
 
-	public void swipeRight() {
+	public void swipeRightOpenSideMenu() {
 		device().swipe(5, 152, 500, 152, 15);
 	}
 }

AndroidE2E/app/src/androidTest/java/com/reactnativenavigation/e2e/androide2e/TopLevelApiTest.java

@@ -22,12 +22,11 @@ public class TopLevelApiTest extends BaseTest {
 		assertMainShown();
 		elementByText("SWITCH TO APP WITH SIDE MENUS").click();
 		assertExists(By.textStartsWith("This is a side menu center screen tab 1"));
-		swipeRight();
+		swipeRightOpenSideMenu();
 		assertExists(By.text("This is a left side menu screen"));
 	}
 
 	@Test
-	@Ignore
 	public void screenLifecycle() throws Exception {
 		launchTheApp();
 		assertMainShown();

lib/android/app/src/main/java/com/reactnativenavigation/layout/containers/Container.java

@@ -22,6 +22,7 @@ public class Container extends FrameLayout {
 		this.id = id;
 		this.name = name;
 		addView(createReactRootView());
+
 	}
 
 	private View createReactRootView() {

lib/android/app/src/main/java/com/reactnativenavigation/utils/UiUtils.java

@@ -0,0 +1,17 @@
+package com.reactnativenavigation.utils;
+
+import android.view.View;
+import android.view.ViewTreeObserver;
+
+public class UiUtils {
+	public static void runOnPreDraw(final View view, final Runnable task) {
+		view.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
+			@Override
+			public boolean onPreDraw() {
+				view.getViewTreeObserver().removeOnPreDrawListener(this);
+				task.run();
+				return true;
+			}
+		});
+	}
+}

lib/android/app/src/test/java/com/reactnativenavigation/utils/UiUtilsTest.java

@@ -0,0 +1,26 @@
+package com.reactnativenavigation.utils;
+
+import android.view.View;
+
+import com.reactnativenavigation.BaseTest;
+
+import org.junit.Test;
+import org.robolectric.shadow.api.Shadow;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyZeroInteractions;
+
+public class UiUtilsTest extends BaseTest {
+	@Test
+	public void runOnPreDraw() throws Exception {
+		View view = Shadow.newInstanceOf(View.class);
+		Runnable task = mock(Runnable.class);
+		verifyZeroInteractions(task);
+
+		UiUtils.runOnPreDraw(view, task);
+		view.getViewTreeObserver().dispatchOnPreDraw();
+		verify(task, times(1)).run();
+	}
+}