logback-android/src/main/java/ch/qos/logback/core/util/EnvUtil.java
static public boolean isAndroidOS() {
    String osname = OptionHelper.getSystemProperty("os.name");
    String root = OptionHelper.getEnv("ANDROID_ROOT");
    String data = OptionHelper.getEnv("ANDROID_DATA");

    return osname != null && osname.contains("Linux") &&
        root != null && root.contains("/system") &&
        data != null && data.contains("/data");
  }
static public boolean isAndroidOS() {
    String osname = OptionHelper.getSystemProperty("os.name");
    String root = OptionHelper.getEnv("ANDROID_ROOT");
    String data = OptionHelper.getEnv("ANDROID_DATA");

    return osname != null && osname.contains("Linux") &&
        root != null && root.contains("/system") &&
        data != null && data.contains("/data");
  }
Heuristically determines whether the current OS is Android