1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.app;
18
19import android.annotation.NonNull;
20import android.content.ComponentName;
21
22/**
23 * Activity manager local system service interface.
24 *
25 * @hide Only for use within the system server.
26 */
27public abstract class ActivityManagerInternal {
28    // Called by the power manager.
29    public abstract void onWakefulnessChanged(int wakefulness);
30
31    public abstract int startIsolatedProcess(String entryPoint, String[] mainArgs,
32            String processName, String abiOverride, int uid, Runnable crashHandler);
33
34    /**
35     * Acquires a sleep token with the specified tag.
36     *
37     * @param tag A string identifying the purpose of the token (eg. "Dream").
38     */
39    public abstract SleepToken acquireSleepToken(@NonNull String tag);
40
41    /**
42     * Sleep tokens cause the activity manager to put the top activity to sleep.
43     * They are used by components such as dreams that may hide and block interaction
44     * with underlying activities.
45     */
46    public static abstract class SleepToken {
47        /**
48         * Releases the sleep token.
49         */
50        public abstract void release();
51    }
52
53    /**
54     * Returns home activity for the specified user.
55     * @param userId ID of the user or {@link android.os.UserHandle#USER_ALL}
56     */
57    public abstract ComponentName getHomeActivityForUser(int userId);
58}
59