android5.0+前后判断应用是否在后台运行区别

android5.0+前后判断应用是否在后台运行区别

5.0之前我们判断的方法

public static boolean isApplicationInBackground(Context context) {
            ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            List taskList = am.getRunningTasks(1);
            if (taskList != null && !taskList.isEmpty()) {
                ComponentName topActivity = taskList.get(0).topActivity;
                if (topActivity != null && !topActivity.getPackageName().equals(context.getPackageName())) {
                    return true;
                }
            }
            return false;
        }

5.0之后上述方法失效，更换为下面方法即可

    public static boolean isApplicationInBackground(Context context) {
    boolean isInBackground = true;
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT > Build.VERSION_CODES.KITKAT_WATCH) {
        List runningProcesses = am.getRunningAppProcesses();
        for (ActivityManager.RunningAppProcessInfo processInfo : runningProcesses) {
            //前台程序
            if (processInfo.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
                for (String activeProcess : processInfo.pkgList) {
                    if (activeProcess.equals(context.getPackageName())) {
                        isInBackground = false;
                    }
                }
            }
        }
    } else {
        List taskInfo = am.getRunningTasks(1);
        ComponentName componentInfo = taskInfo.get(0).topActivity;
        if (componentInfo.getPackageName().equals(context.getPackageName())) {
            isInBackground = false;
        }
    }

    return isInBackground;
}

客户需求操蛋要求退居后台的应用关闭程序，本来ROM做的事情交给前端了。费劲。
内部跳转判断的话注意增加标记位置。