RootUtil.java

package utils;

import java.io.BufferedReader;
import java.io.File;
import java.io.InputStreamReader;

public class RootUtil {
    public static boolean isDeviceRooted() {
        return checkRootMethod1() || checkRootMethod2() || checkRootMethod3() || checkRootMethod4();
    }

    private static boolean checkRootMethod1() {
        String buildTags = android.os.Build.TAGS;
        return buildTags != null && buildTags.contains("test-keys");
    }

    @SuppressWarnings("findbugs:DMI_HARDCODED_ABSOLUTE_FILENAME")
    private static boolean checkRootMethod2() {
        return new File("/system/app/Superuser.apk").exists();
    }

    private static boolean checkRootMethod3() {
        String[] 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" };
        for (String path : paths) {
            if (new File(path).exists()) return true;
        }
        return false;
    }

    private static boolean checkRootMethod4() {
        Process process = null;
        BufferedReader in = null;
        try {
            process = Runtime.getRuntime().exec(new String[] { "/system/xbin/which", "su" });
            in = new BufferedReader(new InputStreamReader(process.getInputStream()));
            if (in.readLine() != null) {
                return true;
            }
            return false;
        } catch (Throwable t) {
            return false;
        } finally {
            try {
                if (in != null) {
                    in.close();
                }
                if (process != null) {
                    process.destroy();
                }
            } catch (Throwable t) {
                // ignore the damn thing!!!
            }
        }
    }
}