检查活动是否正在从服务运行 [英] Check if Activity is running from Service

问题描述

Service 如何检查它的应用程序之一的 Activity 是否在前台运行?

How can a Service check if one of it's application's Activity is running in foreground?

推荐答案

使用下面的方法和你的包名.如果您的任何活动处于前台，它将返回 true.

Use the below method with your package name. It will return true if any of your activities is in foreground.

public boolean isForeground(String myPackage) {
    ActivityManager manager = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
    List<ActivityManager.RunningTaskInfo> runningTaskInfo = manager.getRunningTasks(1); 
    ComponentName componentInfo = runningTaskInfo.get(0).topActivity;
    return componentInfo.getPackageName().equals(myPackage);
}

更新:

添加权限:

Update:

Add Permission:

<uses-permission android:name="android.permission.GET_TASKS" />

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