ActivityManagerInternal.java revision 061ea99546fbba1da86094518992cf6b7a125278 
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;
20
21/**
22 * Activity manager local system service interface.
23 *
24 * @hide Only for use within the system server.
25 */
26public abstract class ActivityManagerInternal {
27    // Called by the power manager.
28    public abstract void onWakefulnessChanged(int wakefulness);
29
30    public abstract int startIsolatedProcess(String entryPoint, String[] mainArgs,
31            String processName, String abiOverride, int uid, Runnable crashHandler);
32
33    /**
34     * Acquires a sleep token with the specified tag.
35     *
36     * @param tag A string identifying the purpose of the token (eg. "Dream").
37     */
38    public abstract SleepToken acquireSleepToken(@NonNull String tag);
39
40    /**
41     * Sleep tokens cause the activity manager to put the top activity to sleep.
42     * They are used by components such as dreams that may hide and block interaction
43     * with underlying activities.
44     */
45    public static abstract class SleepToken {
46        /**
47         * Releases the sleep token.
48         */
49        public abstract void release();
50    }
51}
52