Initial implementation of snapshots
All this functionality is hidden behind a flag. If this flag is
active, we disable the regular screenshots.
Instead, we take a screenshot when an app transition for which a
task is disappearing is starting. The screenshot gets stored
into a gralloc buffer. SystemUI uses a new method to retrieve
a snapshot gralloc buffer and then draws it using GraphicBuffer.
createHardwareBitmap().
When starting an existing activity in an existing tasks, or when
bringing an existing tasks to front from recents, we add a new
snapshot starting window. For that, we reuse the existing
starting window, but when creating the window, we use a fake
window that draws the contents of the starting window.
Test: runtest frameworks-services -c
com.android.server.wm.TaskSnapshotControllerTest
Bug: 31339431
Change-Id: If72df07b3e56f30413db5029d0887b8c9665aaf4
diff --git a/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java
new file mode 100644
index 0000000..5dff997
--- /dev/null
+++ b/services/tests/servicestests/src/com/android/server/wm/TaskSnapshotControllerTest.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2016 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.server.wm;
+
+import static android.view.WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW;
+import static com.android.server.wm.AppTransition.TRANSIT_UNSET;
+import static junit.framework.Assert.assertEquals;
+
+import android.platform.test.annotations.Presubmit;
+import android.support.test.filters.SmallTest;
+import android.support.test.runner.AndroidJUnit4;
+import android.util.ArraySet;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Test class for {@link TaskSnapshotController}.
+ *
+ * runtest frameworks-services -c com.android.server.wm.TaskSnapshotControllerTest
+ */
+@SmallTest
+@Presubmit
+@RunWith(AndroidJUnit4.class)
+public class TaskSnapshotControllerTest extends WindowTestsBase {
+
+ @Test
+ public void testGetClosingApps_closing() throws Exception {
+ final WindowState closingWindow = createWindow(null, FIRST_APPLICATION_WINDOW,
+ "closingWindow");
+ closingWindow.mAppToken.setVisibility(null, false /* visible */, TRANSIT_UNSET,
+ true /* performLayout */, false /* isVoiceInteraction */);
+ final ArraySet<AppWindowToken> closingApps = new ArraySet<>();
+ closingApps.add(closingWindow.mAppToken);
+ final ArraySet<Task> closingTasks = new ArraySet<>();
+ sWm.mTaskSnapshotController.getClosingTasks(closingApps, closingTasks);
+ assertEquals(1, closingTasks.size());
+ assertEquals(closingWindow.mAppToken.mTask, closingTasks.valueAt(0));
+ }
+
+ @Test
+ public void testGetClosingApps_notClosing() throws Exception {
+ final WindowState closingWindow = createWindow(null, FIRST_APPLICATION_WINDOW,
+ "closingWindow");
+ final WindowState openingWindow = createAppWindow(closingWindow.getTask(),
+ FIRST_APPLICATION_WINDOW, "openingWindow");
+ closingWindow.mAppToken.setVisibility(null, false /* visible */, TRANSIT_UNSET,
+ true /* performLayout */, false /* isVoiceInteraction */);
+ openingWindow.mAppToken.setVisibility(null, true /* visible */, TRANSIT_UNSET,
+ true /* performLayout */, false /* isVoiceInteraction */);
+ final ArraySet<AppWindowToken> closingApps = new ArraySet<>();
+ closingApps.add(closingWindow.mAppToken);
+ final ArraySet<Task> closingTasks = new ArraySet<>();
+ sWm.mTaskSnapshotController.getClosingTasks(closingApps, closingTasks);
+ assertEquals(0, closingTasks.size());
+ }
+}