public class RootUtil { public static boolean isDeviceRooted() { return checkRootMethod1() || checkRootMethod2() || checkRootMethod3(); } private static boolean checkRootMethod1() { String buildTags = android.os.Build.TAGS; return buildTags != null && buildTags.contains("test-keys"); } private static boolean checkRootMethod2() { String[] paths = { "/system/app/Superuser.apk", "/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", "/su/bin/su"}; for (String path : paths) { if (new File(path).exists()) return true; } return false; } private static boolean checkRootMethod3() { Process process = null; try { process = Runtime.getRuntime().exec(new String[] { "/system/xbin/which", "su" }); BufferedReader in = new BufferedReader(new InputStreamReader(process.getInputStream())); if (in.readLine() != null) return true; return false; } catch (Throwable t) { return false; } finally { if (process != null) process.destroy(); } } }
Simple Android MVVM using RX and Kotlin
Inversion of Control Containers and the Dependency Injection pattern
S.O.L.I.D.
- Single Responsibility Principle (Принцип единственной обязанности)
- Open Closed Principle (Принцип открытости/закрытости)
- Liskov’s Substitution Principle (Принцип подстановки Барбары Лисков)
- Interface Segregation Principle (Принцип разделения интерфейса)
- Dependency Inversion Principle (Принцип инверсии зависимостей)
Fibonacci numbers
0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765, 10946
Matrix method:
It is interesting to note that the Fibonacci number grows so fast that F-47 exceeds the 32-bit signed integer range.
Binet’s formula
golden ratio = 1.618
Procent ratio is 62% and 38%
as