判断应用程序是否在前台

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.teambition.today" >
    <uses-permission android:name="android.permission.GET_TASKS" />
    
</manifest>    

AppUtil.java

private static boolean isInForeground(Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(context.ACTIVITY_SERVICE);
    ActivityManager.RunningTaskInfo foregroundTaskInfo = am.getRunningTasks(1).get(0);

    String foregroundTaskPackageName = foregroundTaskInfo .topActivity.getPackageName();
    return context.getApplicationContext().getPackageName().equals(foregroundTaskPackageName);
}