判断当前应用是否在后台运行

/**判断程序是否在后台运行*/

public static boolean isRunBackground(Context context) {

}

/**判断程序是否在前台运行（当前运行的程序）*/

public boolean isRunForeground() {
ActivityManager activityManager = (ActivityManager)getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
String packageName = getApplicationContext().getPackageName();
List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
if (appProcesses == null) 

                   return false;

for (RunningAppProcessInfo appProcess : appProcesses) {
if (appProcess.processName.equals(packageName) && appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND) { 

                            return true;//程序运行在前台

        }
}
return false;
}

判断当前应用是否在后台运行

原文：http://blog.csdn.net/true100/article/details/45479827