Android 判断当前app是否是在后台运行

/**

* 判断程序是否在后台运行

*

* @param activity

* @return true 表示在后台运行

*/

public static boolean isRunBackground(Activity activity) {

    ActivityManager activityManager = (ActivityManager) activity.getApplicationContext()

            .getSystemService(Context.ACTIVITY_SERVICE);

    String packageName = activity.getApplicationContext().getPackageName();

    //获取Android设备中所有正在运行的App

    List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager

            .getRunningAppProcesses();

    if (appProcesses == null)

        return true;

    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 false;

        }

    }

    return true;

}

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