Added helper function to enable immersive mode on a window. am: b730c412dd am: 9b16e7cf7f am: 5b0f87b345

Change-Id: I505338d891e59e92084e1ea7712cdb1b08fde96e

2 files changed, 75 insertions, 3 deletions

diff --git a/library/main/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtils.java b/library/main/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtils.java
index 3af842a..6b0d977 100644
--- a/library/main/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtils.java
+++ b/library/main/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtils.java
@@ -18,6 +18,7 @@ package com.android.car.setupwizardlib.util;
 
 import android.app.Activity;
 import android.view.View;
+import android.view.Window;
 
 import androidx.core.util.Preconditions;
 
@@ -35,14 +36,22 @@ public final class CarSetupWizardUiUtils {
      **/
     @Deprecated
     public static void maybeHideSystemUI(Activity activity) {
-        Preconditions.checkNotNull(activity);
+        enableImmersiveMode(activity.getWindow());
+    }
+
+    /**
+     * Enables immersive mode hiding system UI.
+     *
+     * @param window to apply immersive mode.
+     */
+    public static void enableImmersiveMode(Window window) {
+        Preconditions.checkNotNull(window);
 
         // See https://developer.android.com/training/system-ui/immersive#EnableFullscreen
         // Enables regular immersive mode.
         // For "lean back" mode, remove SYSTEM_UI_FLAG_IMMERSIVE.
         // Or for "sticky immersive," replace it with SYSTEM_UI_FLAG_IMMERSIVE_STICKY
-        View decorView = activity.getWindow().getDecorView();
-        decorView.setSystemUiVisibility(
+        window.getDecorView().setSystemUiVisibility(
                 View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
                         // Set the content to appear under the system bars so that the
                         // content doesn't resize when the system bars hide and show.
diff --git a/library/main/tests/robotests/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtilsTest.java b/library/main/tests/robotests/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtilsTest.java
new file mode 100644
index 0000000..2fcf0b6
--- /dev/null
+++ b/library/main/tests/robotests/src/com/android/car/setupwizardlib/util/CarSetupWizardUiUtilsTest.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.car.setupwizardlib.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.app.Activity;
+import android.view.View;
+
+import com.android.car.setupwizardlib.BaseDesignActivity;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.Robolectric;
+import org.robolectric.RobolectricTestRunner;
+
+@RunWith(RobolectricTestRunner.class)
+public class CarSetupWizardUiUtilsTest {
+
+    private static final int IMMERSIVE_MODE_FLAGS =
+            View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY
+                    | View.SYSTEM_UI_FLAG_LAYOUT_STABLE
+                    | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
+                    | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+                    | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION
+                    | View.SYSTEM_UI_FLAG_FULLSCREEN;
+
+    private Activity mActivity;
+
+    @Before
+    public void setup() {
+        mActivity = Robolectric.buildActivity(BaseDesignActivity.class).create().get();
+    }
+
+    @Test
+    public void maybeHideSystemUI() {
+        CarSetupWizardUiUtils.maybeHideSystemUI(mActivity);
+        assertThat(mActivity.getWindow().getDecorView().getSystemUiVisibility())
+                .isEqualTo(IMMERSIVE_MODE_FLAGS);
+    }
+
+    @Test
+    public void enableImmersiveMode() {
+        CarSetupWizardUiUtils.enableImmersiveMode(mActivity.getWindow());
+        assertThat(mActivity.getWindow().getDecorView().getSystemUiVisibility())
+                .isEqualTo(IMMERSIVE_MODE_FLAGS);
+    }
+}