1/*
2 * Copyright (C) 2013 DroidDriver committers
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 com.google.android.droiddriver.util;
18
19import android.app.Activity;
20
21import com.google.android.droiddriver.instrumentation.InstrumentationDriver;
22import com.google.common.base.Supplier;
23
24/**
25 * Static helper methods for retrieving activities.
26 */
27public class ActivityUtils {
28  private static Supplier<Activity> runningActivitySupplier;
29
30  /**
31   * Sets the Supplier for the running (a.k.a. resumed or foreground) activity.
32   * Called from {@link com.google.android.droiddriver.runner.TestRunner}. If a
33   * custom runner is used, this method must be called appropriately, otherwise
34   * {@link #getRunningActivity} won't work.
35   */
36  public static synchronized void setRunningActivitySupplier(Supplier<Activity> activitySupplier) {
37    runningActivitySupplier = activitySupplier;
38  }
39
40  /**
41   * Gets the running (a.k.a. resumed or foreground) activity.
42   * {@link InstrumentationDriver} depends on this.
43   *
44   * @return the currently running activity, or null if no activity has focus.
45   */
46  public static synchronized Activity getRunningActivity() {
47    return runningActivitySupplier.get();
48  }
49}
50