Android | 判断 Activity 是否正在前台显示

代码

        /**
     * 判断某个activity是否在前台显示
     */
    public static boolean isForeground(Activity activity) {
        return isForeground(activity, activity.getClass().getName());
    }

    /**
     * 判断某个界面是否在前台,返回true，为显示,否则不是
     */
    static boolean isForeground(Activity context, String className) {
        if (context == null || TextUtils.isEmpty(className))
            return false;
        ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
        List<ActivityManager.RunningTaskInfo> list = am.getRunningTasks(1);
        if (list != null && !list.isEmpty()) {
            ComponentName cpn = list.get(0).topActivity;
            return cpn != null && className.equals(cpn.getClassName());
        }
        return false;
    }

调用

                if (isForeground(activity)){
                    //在前台显示，做逻辑
                }