Add API to disable snapshotting of activities

Test: runtest frameworks-services -c
com.android.server.wm.TaskSnapshotControllerTest
Test: Launch DisableScreenshotsActivity, go to recents, make sure
content is white.
Bug: 31339431

Change-Id: I329925d2fca389e561da3389a67fe888b5bb1033

1 files changed, 35 insertions, 0 deletions

diff --git a/tests/ActivityTests/src/com/google/android/test/activity/DisableScreenshotsActivity.java b/tests/ActivityTests/src/com/google/android/test/activity/DisableScreenshotsActivity.java
new file mode 100644
index 000000000000..de24ca2ac9e8
--- /dev/null
+++ b/tests/ActivityTests/src/com/google/android/test/activity/DisableScreenshotsActivity.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2017 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.google.android.test.activity;
+
+import android.annotation.Nullable;
+import android.app.Activity;
+import android.graphics.Color;
+import android.os.Bundle;
+
+/**
+ * Activity for which screenshotting is disabled.
+ */
+public class DisableScreenshotsActivity extends Activity {
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setDisablePreviewScreenshots(true);
+        getWindow().getDecorView().setBackgroundColor(Color.RED);
+    }
+}