Import Android SDK Platform PI [4335822]

/google/data/ro/projects/android/fetch_artifact \
    --bid 4335822 \
    --target sdk_phone_armv7-win_sdk \
    sdk-repo-linux-sources-4335822.zip

AndroidVersion.ApiLevel has been modified to appear as 28

Change-Id: Ic8f04be005a71c2b9abeaac754d8da8d6f9a2c32

1 files changed, 72 insertions, 0 deletions

diff --git a/android/view/FrameMetricsObserver.java b/android/view/FrameMetricsObserver.java
new file mode 100644
index 00000000..9e81de0e
--- /dev/null
+++ b/android/view/FrameMetricsObserver.java
@@ -0,0 +1,72 @@
+/*
+ * 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 android.view;
+
+import android.annotation.NonNull;
+import android.os.Looper;
+import android.os.MessageQueue;
+
+import com.android.internal.util.VirtualRefBasePtr;
+
+import java.lang.ref.WeakReference;
+
+/**
+ * Provides streaming access to frame stats information from the rendering
+ * subsystem to apps.
+ *
+ * @hide
+ */
+public class FrameMetricsObserver {
+    private MessageQueue mMessageQueue;
+
+    private WeakReference<Window> mWindow;
+
+    private FrameMetrics mFrameMetrics;
+
+    /* package */ Window.OnFrameMetricsAvailableListener mListener;
+    /* package */ VirtualRefBasePtr mNative;
+
+    /**
+     * Creates a FrameMetricsObserver
+     *
+     * @param looper the looper to use when invoking callbacks
+     */
+    FrameMetricsObserver(@NonNull Window window, @NonNull Looper looper,
+            @NonNull Window.OnFrameMetricsAvailableListener listener) {
+        if (looper == null) {
+            throw new NullPointerException("looper cannot be null");
+        }
+
+        mMessageQueue = looper.getQueue();
+        if (mMessageQueue == null) {
+            throw new IllegalStateException("invalid looper, null message queue\n");
+        }
+
+        mFrameMetrics = new FrameMetrics();
+        mWindow = new WeakReference<>(window);
+        mListener = listener;
+    }
+
+    // Called by native on the provided Handler
+    @SuppressWarnings("unused")
+    private void notifyDataAvailable(int dropCount) {
+        final Window window = mWindow.get();
+        if (window != null) {
+            mListener.onFrameMetricsAvailable(window, mFrameMetrics, dropCount);
+        }
+    }
+}