+ * Example: + *
{@code
+ * (@BinderThread
+ * public BeamShareData createBeamShareData() { ... }
+ * }
+ *
+ * {@hide}
+ */
+@Retention(SOURCE)
+@Target({METHOD,CONSTRUCTOR,TYPE})
+public @interface BinderThread {
+}
\ No newline at end of file
diff --git a/core/java/android/annotation/MainThread.java b/core/java/android/annotation/MainThread.java
new file mode 100644
index 0000000000000..18a4283b2532d
--- /dev/null
+++ b/core/java/android/annotation/MainThread.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 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.annotation;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.CONSTRUCTOR;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.TYPE;
+import static java.lang.annotation.RetentionPolicy.SOURCE;
+
+/**
+ * Denotes that the annotated method should only be called on the main thread.
+ * If the annotated element is a class, then all methods in the class should be called
+ * on the main thread.
+ * + * Example: + *
{@code
+ * @MainThread
+ * public void deliverResult(D data) { ... }
+ * }
+ *
+ * {@hide}
+ */
+@Retention(SOURCE)
+@Target({METHOD,CONSTRUCTOR,TYPE})
+public @interface MainThread {
+}
\ No newline at end of file
diff --git a/core/java/android/annotation/UiThread.java b/core/java/android/annotation/UiThread.java
new file mode 100644
index 0000000000000..b81460023112c
--- /dev/null
+++ b/core/java/android/annotation/UiThread.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 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.annotation;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.CONSTRUCTOR;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.TYPE;
+import static java.lang.annotation.RetentionPolicy.SOURCE;
+
+/**
+ * Denotes that the annotated method or constructor should only be called on the UI thread.
+ * If the annotated element is a class, then all methods in the class should be called
+ * on the UI thread.
+ * + * Example: + *
{@code
+ * @UiThread
+ * public abstract void setText(@NonNull String text) { ... }
+ * }
+ *
+ * {@hide}
+ */
+@Retention(SOURCE)
+@Target({METHOD,CONSTRUCTOR,TYPE})
+public @interface UiThread {
+}
\ No newline at end of file
diff --git a/core/java/android/annotation/WorkerThread.java b/core/java/android/annotation/WorkerThread.java
new file mode 100644
index 0000000000000..dd12e05ed71a9
--- /dev/null
+++ b/core/java/android/annotation/WorkerThread.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2015 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.annotation;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import static java.lang.annotation.ElementType.CONSTRUCTOR;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.TYPE;
+import static java.lang.annotation.RetentionPolicy.SOURCE;
+
+/**
+ * Denotes that the annotated method should only be called on a worker thread.
+ * If the annotated element is a class, then all methods in the class should be called
+ * on a worker thread.
+ * + * Example: + *
{@code
+ * (@WorkerThread
+ * protected abstract FilterResults performFiltering(CharSequence constraint);
+ * }
+ *
+ * {@hide}
+ */
+@Retention(SOURCE)
+@Target({METHOD,CONSTRUCTOR,TYPE})
+public @interface WorkerThread {
+}
\ No newline at end of file