Java tutorial
//package com.java2s; import android.app.ActivityManager; import android.content.Context; import java.util.List; public class Main { public static boolean isAppOnForeground(Context context, String packageName) { // Returns a list of application processes that are running on the device ActivityManager activityManager = (ActivityManager) context.getSystemService(context.ACTIVITY_SERVICE); List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses(); if (appProcesses == null) return false; for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) { // The name of the process that this object is associated with. if (appProcess.processName.equals(packageName) && appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) { return true; } } return false; } }