RootBeer是一个由Scott和Matthew开发的Android根检查库。 它使用各种检查来指示设备是否已根。

Java检查 CheckRootManagementApps CheckPotentiallyDangerousAppss CheckRootCloakingApps CheckTestKeys checkForDangerousProps checkForBusyBoxBinary checkForSuBinary checkSuExists checkForRWSystem 本地检查 我们调用本地根检查器来运行它自己的一些检查 检查。本地检查通常很难隐藏，所以一些根 斗篷应用程序只是阻止加载本机库包含 某些关键词。 checkForSuBinary

一些用于设置系统属性ro的修改版本。Modversion用于此目的。事情似乎已经发生了变化;我几个月前在TheDude上的构建是这样的:

cmb@apollo:~$ adb -d shell getprop |grep build
[ro.build.id]: [CUPCAKE]
[ro.build.display.id]: [htc_dream-eng 1.5 CUPCAKE eng.TheDudeAbides.20090427.235325 test-keys]
[ro.build.version.incremental]: [eng.TheDude.2009027.235325]
[ro.build.version.sdk]: [3]
[ro.build.version.release]: [1.5]
[ro.build.date]: [Mon Apr 20 01:42:32 CDT 2009]
[ro.build.date.utc]: [1240209752]
[ro.build.type]: [eng]
[ro.build.user]: [TheDude]
[ro.build.host]: [ender]
[ro.build.tags]: [test-keys]
[ro.build.product]: [dream]
[ro.build.description]: [kila-user 1.1 PLAT-RC33 126986 ota-rel-keys,release-keys]
[ro.build.fingerprint]: [tmobile/kila/dream/trout:1.1/PLAT-RC33/126986:user/ota-rel-keys,release-keys]
[ro.build.changelist]: [17615# end build properties]

另一方面，来自1.5 SDK的模拟器，运行1.5镜像，也有根，可能类似于Android Dev Phone 1(你可能想要允许)，并有这个:

cmb@apollo:~$ adb -e shell getprop |grep build
[ro.build.id]: [CUPCAKE]
[ro.build.display.id]: [sdk-eng 1.5 CUPCAKE 148875 test-keys]
[ro.build.version.incremental]: [148875]
[ro.build.version.sdk]: [3]
[ro.build.version.release]: [1.5]
[ro.build.date]: [Thu May 14 18:09:10 PDT 2009]
[ro.build.date.utc]: [1242349750]
[ro.build.type]: [eng]
[ro.build.user]: [android-build]
[ro.build.host]: [undroid16.mtv.corp.google.com]
[ro.build.tags]: [test-keys]
[ro.build.product]: [generic]
[ro.build.description]: [sdk-eng 1.5 CUPCAKE 148875 test-keys]
[ro.build.fingerprint]: [generic/sdk/generic/:1.5/CUPCAKE/148875:eng/test-keys]

至于零售构建，我手头没有，但在site:xda developers.com下的各种搜索提供了大量信息。这是荷兰的G1, ro。build。tags没有test-key，我认为这可能是最可靠的属性。

更新2017

你现在可以用谷歌Safetynet API做到这一点。SafetyNet API提供了认证API，它可以帮助您评估应用程序运行的Android环境的安全性和兼容性。

这种认证可以帮助确定特定设备是否被篡改或修改过。

认证API返回如下所示的JWS响应

{
  "nonce": "R2Rra24fVm5xa2Mg",
  "timestampMs": 9860437986543,
  "apkPackageName": "com.package.name.of.requesting.app",
  "apkCertificateDigestSha256": ["base64 encoded, SHA-256 hash of the
                                  certificate used to sign requesting app"],
  "apkDigestSha256": "base64 encoded, SHA-256 hash of the app's APK",
  "ctsProfileMatch": true,
  "basicIntegrity": true,
}

解析此响应可以帮助您确定设备是否已扎根

根设备似乎导致ctsProfileMatch=false。

您可以在客户端执行此操作，但建议在服务器端解析响应。 一个基本的客户端服务器架构与安全网API将看起来像这样

截至2021年(今天)，似乎没有任何可靠的方法或方法来检测根目录，特别是在启用了MagiskHide等强大的隐藏工具的情况下。这里的大多数答案都不再相关，所以不要在生产中使用它。依靠可靠的检查，如SafetyNet，而不是额外的英里检测根，我建议在两个运行时保护你的应用程序，如防止调试器/检测，并确保使用混淆。

使用谷歌SafetyNet认证API，您可以轻松检查您的设备是否已根:

Add dependency in build.gradle(:app) implementation 'com.google.android.gms:play-services-safetynet:17.0.0' Get Api key and enable Android Device Verification API using link public static void sendSafetyNetRequest(Activity context) { if(GoogleApiAvailability.getInstance().isGooglePlayServicesAvailable(context, 13000000) == ConnectionResult.SUCCESS) { Log.e(TAG, "The SafetyNet Attestation API is available"); // TODO(developer): Change the nonce generation to include your own, used once value, // ideally from your remote server. String nonceData = "Safety Net Sample: " + System.currentTimeMillis(); ByteArrayOutputStream byteStream = new ByteArrayOutputStream(); Random mRandom = new SecureRandom(); byte[] bytes = new byte[24]; mRandom.nextBytes(bytes); try { byteStream.write(bytes); byteStream.write(nonceData.getBytes()); } catch (IOException e) { e.printStackTrace(); } byte[] nonce = byteStream.toByteArray(); SafetyNetClient client = SafetyNet.getClient(context); Task<SafetyNetApi.AttestationResponse> task = client.attest(nonce, API_KEY_FROM_STEP_2_LINK); task.addOnSuccessListener(context, attestationResponse -> { /* TODO(developer): Forward this result to your server together with the nonce for verification. You can also parse the JwsResult locally to confirm that the API returned a response by checking for an 'error' field first and before retrying the request with an exponential backoff. NOTE: Do NOT rely on a local, client-side only check for security, you must verify the response on a remote server! */ String jwsResult = attestationResponse.getJwsResult(); Log.e(TAG, "Success! SafetyNet result:\n" + jwsResult + "\n"); if (jwsResult == null) { Log.e(TAG, "jwsResult Null"); } final String[] jwtParts = jwsResult.split("\\."); if (jwtParts.length == 3) { String decodedPayload = new String(Base64.decode(jwtParts[1], Base64.DEFAULT)); Log.e(TAG, "decodedPayload : " + decodedPayload); } }); task.addOnFailureListener(context, e -> { // An error occurred while communicating with the service. String mResult = null; if (e instanceof ApiException) { // An error with the Google Play Services API contains some additional details. ApiException apiException = (ApiException) e; Util.showLog(TAG, "Error: " + CommonStatusCodes.getStatusCodeString(apiException.getStatusCode()) + ": " + apiException.getStatusMessage()); } else { // A different, unknown type of error occurred. Log.e(TAG, "ERROR! " + e.getMessage()); } }); } else { Log.e(TAG, "Prompt user to update Google Play services."; } } ` Check your logs for decodedPayload if ctsProfileMatch and basicIntegrity both are false it means your device is rooted . The Attestation API returns a JWS response which looks like:

{"nonce": "6pLrr9zWyl6TNzj+kpbR4LZcfPY3U2FmZXR5IE5ldCBTYW1wbGU6IDE2MTQ2NzkwMTIzNjc="， " timestamms ": 9860437986543， "apkPackageName": "你的包名将显示在这里"，"ctsProfileMatch": true， "apkDigestSha256": ["base64编码，用于签名请求应用程序的证书的SHA-256哈希值"]，"basicIntegrity": true， "evaluationType": "BASIC"}

欲了解更多信息，请查看此链接。

如果你已经在使用Fabric/Firebase Crashlytics，你可以打电话

CommonUtils.isRooted(context)

这是该方法的当前实现:

public static boolean isRooted(Context context) {
    boolean isEmulator = isEmulator(context);
    String buildTags = Build.TAGS;
    if (!isEmulator && buildTags != null && buildTags.contains("test-keys")) {
        return true;
    } else {
        File file = new File("/system/app/Superuser.apk");
        if (file.exists()) {
            return true;
        } else {
            file = new File("/system/xbin/su");
            return !isEmulator && file.exists();
        }
    }
}

public static boolean isEmulator(Context context) {
    String androidId = Secure.getString(context.getContentResolver(), "android_id");
    return "sdk".equals(Build.PRODUCT) || "google_sdk".equals(Build.PRODUCT) || androidId == null;
}