Android检查手机是否被root

论坛里找了好久，没找到demo,只好自己摸索，借鉴了一下，自己测试了一下是可以的，分享出来，欢迎补充

                let isRoot = false;  
                const paths = ["/sbin/su", "/system/bin/su", "/system/xbin/su", "/data/local/xbin/su", "/data/local/bin/su", "/system/sd/xbin/su",  
                                "/system/bin/failsafe/su", "/data/local/su"];  

                var File = plus.android.importClass("java.io.File");  
                for (let i = 0; i < paths.length; i++) {  
                    let path = paths[i];  
                    var fd = new File(path);  
                    if(fd.exists()){  
                       isRoot = true;  
                       break;  
                    }  
                }