Android Java toolkit for Auth0 API
Android API version 15 or newer
Auth0.android is available through Gradle. To install it, simply add the following line to your build.gradle
file:
dependencies {
implementation 'com.auth0.android:auth0:1.20.1'
}
Those using this library from version 1.14.0
and up should start targeting latest android SDK versions, as recommended by Google. Those running into conflicts because of different com.android.support
libraries versions can choose to use the latest release 28.0.0
or exclude the ones required by this library and require a different version in their app's build.gradle
file as shown below:
e.g. if choosing an older version such as 25.4.0
apply plugin: 'com.android.application'
android {
//...
}
dependencies {
implementation ('com.auth0.android:lock:1.14.1'){
exclude group: 'com.android.support', module: 'appcompat-v7'
exclude group: 'com.android.support', module: 'customtabs'
}
implementation 'com.android.support:appcompat-v7:25.4.0'
implementation 'com.android.support:customtabs:25.4.0'
//...
}
Open your app's AndroidManifest.xml
file and add the following permission.
<uses-permission android:name="android.permission.INTERNET" />
First create an instance of Auth0
with your Application information
Auth0 account = new Auth0("{YOUR_CLIENT_ID}", "{YOUR_DOMAIN}");
Alternatively, you can save your Application information in the strings.xml
file using the following names:
<resources>
<string name="com_auth0_client_id">YOUR_CLIENT_ID</string>
<string name="com_auth0_domain">YOUR_DOMAIN</string>
</resources>
And then create a new Auth0 instance by passing an Android Context:
Auth0 account = new Auth0(context);
It is strongly encouraged that this SDK be used in OIDC Conformant mode. When this mode is enabled, it will force the SDK to use Auth0's current authentication pipeline and will prevent it from reaching legacy endpoints. By default is false
Auth0 account = new Auth0("{YOUR_CLIENT_ID}", "{YOUR_DOMAIN}");
//Configure the account in OIDC conformant mode
account.setOIDCConformant(true);
//Use the account in the API clients
For more information, please see the OIDC adoption guide.
First go to the Auth0 Dashboard and go to your application's settings. Make sure you have in Allowed Callback URLs a URL with the following format:
https://{YOUR_AUTH0_DOMAIN}/android/{YOUR_APP_PACKAGE_NAME}/callback
Remember to replace {YOUR_APP_PACKAGE_NAME}
with your actual application's package name, available in your app/build.gradle
file as the applicationId
value.
Next, define the Manifest Placeholders for the Auth0 Domain and Scheme which are going to be used internally by the library to register an intent-filter. Go to your application's build.gradle
file and add the manifestPlaceholders
line as shown below:
apply plugin: 'com.android.application'
android {
compileSdkVersion 25
defaultConfig {
applicationId "com.auth0.samples"
minSdkVersion 15
targetSdkVersion 25
//...
//---> Add the next line
manifestPlaceholders = [auth0Domain: "@string/com_auth0_domain", auth0Scheme: "https"]
//<---
}
//...
}
It's a good practice to define reusable resources like @string/com_auth0_domain
but you can also hard code the value in the file. The scheme value can be either https
or a custom one. Read this section to learn more.
Alternatively, you can declare the RedirectActivity
in the AndroidManifest.xml
file with your own intent-filter so it overrides the library's default. If you do this then the manifestPlaceholders
don't need to be set as long as the activity contains the tools:node="replace"
like in the snippet below.
In your manifest inside your application's tag add the RedirectActivity
declaration:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="your.app.package">
<application android:theme="@style/AppTheme">
<!-- ... -->
<activity
android:name="com.auth0.android.provider.RedirectActivity"
tools:node="replace">
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<category android:name="android.intent.category.DEFAULT" />
<category android:name="android.intent.category.BROWSABLE" />
<data
android:host="@string/com_auth0_domain"
android:pathPrefix="/android/${applicationId}/callback"
android:scheme="https" />
</intent-filter>
</activity>
<!-- ... -->
</application>
</manifest>
If you request a different scheme you must replace the above android:scheme
property value and initialize the provider with the new scheme. Read this section to learn more.
Finally, don't forget to add the internet permission.
<uses-permission android:name="android.permission.INTERNET" />
In versions 1.8.0 and before you had to define the intent-filter inside your activity to capture the result in the
onNewIntent
method and callWebAuthProvider.resume()
with the received intent. This call is no longer required for versions greater than 1.8.0 as it's now done for you by the library.
Finally, authenticate by showing the Auth0 Universal Login:
//Configure and launch the authentication
WebAuthProvider.login(account)
.start(MainActivity.this, authCallback);
//Declare the callback that will receive the result
AuthCallback authCallback = new AuthCallback() {
@Override
public void onFailure(@NonNull Dialog dialog) {
//failed with a dialog
}
@Override
public void onFailure(AuthenticationException exception) {
//failed with an exception
}
@Override
public void onSuccess(@NonNull Credentials credentials) {
//succeeded!
}
};
If you've followed the configuration steps, the authentication result will be redirected from the browser to your application and you'll receive it in the Callback.
If you don't plan to use the Web Authentication feature you will still be prompted to provide the manifestPlaceholders
values since the AuthenticationActivity
included in this library will require them and the Gradle tasks won't be able to run. Declare the activity manually with tools:node="remove"
in your app's Android Manifest in order to make the manifest merger remove it from the final manifest file. Additionally, 2 more unused activities can be removed from the final APK by using the same process. A complete snippet to achieve this is:
<activity
android:name="com.auth0.android.provider.AuthenticationActivity"
tools:node="remove"/>
<!--Optional: Remove RedirectActivity and WebAuthActivity -->
<activity
android:name="com.auth0.android.provider.RedirectActivity"
tools:node="remove"/>
<activity
android:name="com.auth0.android.provider.WebAuthActivity"
tools:node="remove"/>
If you've followed this documents' configuration steps you've noticed that the default scheme used in the Callback URI is https
. This works best for Android API 23 or newer if you're using Android App Links, but in previous Android versions this may show the intent chooser dialog prompting the user to choose either your application or the browser. You can change this behaviour by using a custom unique scheme so that the OS opens directly the link with your app.
- Update the
auth0Scheme
Manifest Placeholder on theapp/build.gradle
file or update the intent-filter declaration in theAndroidManifest.xml
to use the new scheme. - Update the Allowed Callback URLs in your Auth0 Dashboard application's settings.
- Call
withScheme()
passing the custom scheme you want to use.
WebAuthProvider.login(account)
.withScheme("myapp")
.start(MainActivity.this, authCallback);
WebAuthProvider.login(account)
.withConnection("twitter")
.start(MainActivity.this, authCallback);
To use the
Code Grant
in Android, go to your Application in the dashboard, Settings tab, setApplication Type
toNative
andToken Endpoint Authentication Method
toNone
.
WebAuthProvider.login(account)
.useCodeGrant(true)
.start(MainActivity.this, authCallback);
The snippet below requests the "userinfo" audience in order to guarantee OIDC compliant responses from the server. This can also be achieved by flipping the "OIDC Conformant" switch on in the OAuth Advanced Settings of your application. For more information check this documentation.
WebAuthProvider.login(account)
.withAudience("https://{YOUR_AUTH0_DOMAIN}/userinfo")
.start(MainActivity.this, authCallback);
Replace
{YOUR_AUTH0_DOMAIN}
with your actual Auth0 domain (i.e.mytenant.auth0.com
).
WebAuthProvider.login(account)
.withScope("openid profile email")
.start(MainActivity.this, authCallback);
The default scope used is
openid
WebAuthProvider.login(account)
.withConnectionScope("email", "profile", "calendar:read")
.start(MainActivity.this, authCallback);
If the device where the app is running has a Custom Tabs compatible Browser, a Custom Tab will be preferred for the authentication flow. You can customize the Page Title visibility and the Toolbar color by using the CustomTabsOptions
class.
CustomTabsOptions options = CustomTabsOptions.newBuilder()
.withToolbarColor(R.color.ct_toolbar_color)
.showTitle(true)
.build();
WebAuthProvider.login(account)
.withCustomTabsOptions(options)
.start(MainActivity.this, authCallback);
To log the user out and clear the SSO cookies that the Auth0 Server keeps attached to your browser app, you need to call the logout endpoint. This can be done is a similar fashion to how you authenticated before: using the WebAuthProvider
class.
Make sure to revisit that section to configure the Manifest Placeholders if you still cannot authenticate successfully. The values set there are used to generate the URL that the server will redirect the user back to after a successful log out.
In order for this redirection to happen, you must copy the Allowed Callback URLs value you added for authentication into the Allowed Logout URLs field in your application settings. Both fields should have an URL with the following format:
https://{YOUR_AUTH0_DOMAIN}/android/{YOUR_APP_PACKAGE_NAME}/callback
Remember to replace {YOUR_APP_PACKAGE_NAME}
with your actual application's package name, available in your app/build.gradle
file as the applicationId
value.
Initialize the provider, this time calling the static method logout
.
//Configure and launch the log out
WebAuthProvider.logout(account)
.start(MainActivity.this, logoutCallback);
//Declare the callback that will receive the result
BaseCallback logoutCallback = new BaseCallback<Void, Auth0Exception>() {
@Override
public void onFailure(Auth0Exception exception) {
//failed with an exception
}
@Override
public void onSuccess(@NonNull Void payload) {
//succeeded!
}
};
The callback will get invoked when the user returns to your application. If this is the result of being redirected back by the server, that would be considered a success. There are some scenarios in which this can fail:
- When there is no browser application that can open a URL. The cause of the exception will be an instance of
ActivityNotFoundException
. - When the user closes the browser manually, e.g. by pressing the back key on their device.
- When the
returnTo
URL is not found in the Allowed Logout URLs in your Auth0 application settings.
If the device where the app is running has a Custom Tabs compatible Browser, a Custom Tab will be preferred for the logout flow. You can customize the Page Title visibility and the Toolbar color by using the CustomTabsOptions
class.
CustomTabsOptions options = CustomTabsOptions.newBuilder()
.withToolbarColor(R.color.ct_toolbar_color)
.showTitle(true)
.build();
WebAuthProvider.logout(account)
.withCustomTabsOptions(options)
.start(MainActivity.this, logoutCallback);
This configuration will probably match what you've done for the authentication setup.
WebAuthProvider.logout(account)
.withScheme("myapp")
.start(MainActivity.this, logoutCallback);
Check out the Android QuickStart Guide to find out more about the Auth0.Android toolkit and explore our tutorials and sample projects.
The client provides methods to authenticate the user against Auth0 server.
Create a new instance by passing the account:
AuthenticationAPIClient authentication = new AuthenticationAPIClient(account);
If the Auth0
instance wasn't configured as "OIDC conformant", this call requires the Application to have the Resource Owner Client Grant Type enabled. Check this article to learn how to enable it.
authentication
.login("info@auth0.com", "a secret password", "my-database-connection")
.start(new BaseCallback<Credentials, AuthenticationException>() {
@Override
public void onSuccess(Credentials payload) {
//Logged in!
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
The default scope used is
openid
This call requires the client to have the MFA Client Grant Type enabled. Check this article to learn how to enable it.
When you sign in to a multifactor authentication enabled connection using the login
method, you receive an error standing that MFA is required for that user along with an mfa_token
value. Use this value to call loginWithOTP
and complete the MFA flow passing the One Time Password from the enrolled MFA code generator app.
authentication
.loginWithOTP("the mfa token", "123456")
.start(new BaseCallback<Credentials, AuthenticationException>() {
@Override
public void onSuccess(Credentials payload) {
//Logged in!
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
This feature requires your Application to have a specific Grant Type enabled. If the OIDC Conformant flag is enabled, the required Grant Type is Passwordless OTP. If instead the flag is disabled, the required Grant Type is Resource Owner. Check this article to learn how to enable it.
Passwordless it's a 2 steps flow:
Step 1: Request the code
authentication
.passwordlessWithEmail("info@auth0.com", PasswordlessType.CODE, "my-passwordless-connection")
.start(new BaseCallback<Void, AuthenticationException>() {
@Override
public void onSuccess(Void payload) {
//Code sent!
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
The default scope used is
openid
Step 2: Input the code
authentication
.loginWithEmail("info@auth0.com", "123456", "my-passwordless-connection")
.start(new BaseCallback<Credentials, AuthenticationException>() {
@Override
public void onSuccess(Credentials payload) {
//Logged in!
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
authentication
.signUp("info@auth0.com", "a secret password", "my-database-connection")
.start(new BaseCallback<Credentials, AuthenticationException>() {
@Override
public void onSuccess(Credentials payload) {
//Signed Up & Logged in!
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
authentication
.userInfo("user access_token")
.start(new BaseCallback<UserProfile, AuthenticationException>() {
@Override
public void onSuccess(UserProfile payload) {
//Got the profile!
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
The client provides methods to link and unlink users account.
Create a new instance by passing the account and the primary user token:
Auth0 account = new Auth0("client id", "domain");
UsersAPIClient users = new UsersAPIClient(account, "api token");
users
.link("primary user id", "secondary user token")
.start(new BaseCallback<List<UserIdentity>, ManagementException>() {
@Override
public void onSuccess(List<UserIdentity> payload) {
//Got the updated identities! Accounts linked.
}
@Override
public void onFailure(ManagementException error) {
//Error!
}
});
users
.unlink("primary user id", "secondary user id", "secondary provider")
.start(new BaseCallback<List<UserIdentity>, ManagementException>() {
@Override
public void onSuccess(List<UserIdentity> payload) {
//Got the updated identities! Accounts linked.
}
@Override
public void onFailure(ManagementException error) {
//Error!
}
});
users
.getProfile("user id")
.start(new BaseCallback<UserProfile, ManagementException>() {
@Override
public void onSuccess(UserProfile payload) {
//Profile received
}
@Override
public void onFailure(ManagementException error) {
//Error!
}
});
Map<String, Object> metadata = new HashMap<>();
metadata.put("name", Arrays.asList("My", "Name", "Is"));
metadata.put("phoneNumber", "1234567890");
users
.updateMetadata("user id", metadata)
.start(new BaseCallback<UserProfile, ManagementException>() {
@Override
public void onSuccess(UserProfile payload) {
//User Metadata updated
}
@Override
public void onFailure(ManagementException error) {
//Error!
}
});
In all the cases, the
User ID
parameter is the unique identifier of the auth0 account instance. i.e. ingoogle-oauth2|123456789081523216417
it would be the part after the '|' pipe:123456789081523216417
.
This library ships with two additional classes that help you manage the Credentials received during authentication. Depending on the minimum API level that your application is targeting you may like to use a different implementation.
The basic version supports asking for Credentials
existence, storing them and getting them back. If the credentials have expired and a refresh_token was saved, they are automatically refreshed. The class is called CredentialsManager
and requires at minimum Android API 15.
- Instantiate the manager:
You'll need an
AuthenticationAPIClient
instance to renew the credentials when they expire and aStorage
object. We provide aSharedPreferencesStorage
class that makes use ofSharedPreferences
to create a file in the application's directory with Context.MODE_PRIVATE mode. This implementation is thread safe and can either be obtained through a shared method or on demand.
AuthenticationAPIClient authentication = new AuthenticationAPIClient(account);
Storage storage = new SharedPreferencesStorage(this);
CredentialsManager manager = new CredentialsManager(authentication, storage);
- Save credentials:
The credentials to save must have
expires_in
and at least anaccess_token
orid_token
value. If one of the values is missing when trying to set the credentials, the method will throw aCredentialsManagerException
. If you want the manager to successfully renew the credentials when expired you must also request theoffline_access
scope when logging in in order to receive arefresh_token
value along with the rest of the tokens. i.e. Logging in with a database connection and saving the credentials:
authentication
.login("info@auth0.com", "a secret password", "my-database-connection")
.setScope("openid offline_access")
.start(new BaseCallback<Credentials, AuthenticationException>() {
@Override
public void onSuccess(Credentials payload) {
//Save the credentials
manager.saveCredentials(credentials);
}
@Override
public void onFailure(AuthenticationException error) {
//Error!
}
});
- Check credentials existence:
There are cases were you just want to check if a user session is still valid (i.e. to know if you should present the login screen or the main screen). For convenience, we include a
hasValidCredentials
method that can let you know in advance if a non-expired token is available without making an additional network call. The same rules of thegetCredentials
method apply:
boolean authenticated = manager.hasValidCredentials();
- Retrieve credentials:
Existing credentials will be returned if they are still valid, otherwise the
refresh_token
will be used to attempt to renew them. If theexpires_in
or both theaccess_token
andid_token
values are missing, the method will throw aCredentialsManagerException
. The same will happen if the credentials have expired and there's norefresh_token
available.
manager.getCredentials(new BaseCallback<Credentials, CredentialsManagerException>() {
@Override
public void onSuccess(Credentials credentials){
//Use the Credentials
}
@Override
public void onFailure(CredentialsManagerException error){
//Error!
}
});
- Clear credentials: When you want to log the user out:
manager.clearCredentials();
This version expands the minimum version and adds encryption to the data storage. Additionally, in those devices where a Secure Lock Screen has been configured it can require the user authentication before letting them obtain the stored credentials. The class is called SecureCredentialsManager
and requires at minimum Android API 21.
The usage is similar to the previous version, with the slight difference that the manager now requires a valid android Context
as shown below:
AuthenticationAPIClient authentication = new AuthenticationAPIClient(account);
Storage storage = new SharedPreferencesStorage(this);
SecureCredentialsManager manager = new SecureCredentialsManager(this, authentication, storage);
You can require the user authentication to obtain credentials. This will make the manager prompt the user with the device's configured Lock Screen, which they must pass correctly in order to obtain the credentials. This feature is only available on devices where the user has setup a secured Lock Screen (PIN, Pattern, Password or Fingerprint).
To enable authentication you must call the requireAuthentication
method passing a valid Activity context, a Request Code that represents the authentication call, and the title and description to display in the LockScreen. As seen in the snippet below, you can leave these last two parameters with null
to use the system default resources.
//You might want to define a constant with the Request Code
private static final int AUTH_REQ_CODE = 11;
manager.requireAuthentication(this, AUTH_REQ_CODE, null, null);
When the above conditions are met and the manager requires the user authentication, it will use the activity context to launch a new activity for the result. The outcome of getting approved or rejected by the Lock Screen is given back to the activity in the onActivityResult
method, which your activity must override to redirect the data to the manager using the checkAuthenticationResult
method.
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (manager.checkAuthenticationResult(requestCode, resultCode)) {
return;
}
super.onActivityResult(requestCode, resultCode, data);
}
The checkAuthenticationResult
method will continue the retrieval of credentials on a successful authentication, and the decrypted credentials will be delivered to the callback passed on the getCredentials
call.
In the event that something happened while trying to save or retrieve the credentials, a CredentialsManagerException
will be thrown. These are some of the expected failure scenarios:
- Invalid Credentials format or values. e.g. when it's missing the
access_token
, theid_token
or theexpires_at
values. - Tokens have expired but no
refresh_token
is available to perform a refresh credentials request. - Device's Lock Screen security settings have changed (e.g. the PIN code was changed). Even when
hasCredentials
returns true, the encryption keys will be deemed invalid and untilsaveCredentials
is called again it won't be possible to decrypt any previously existing content, since they keys used back then are not the same as the new ones. - Device is not compatible with some of the algorithms required by the
SecureCredentialsManager
class. This is considered a catastrophic event and might happen when the OEM has modified the Android ROM removing some of the officially included algorithms. Nevertheless, it can be checked in the exception instance itself by callingisDeviceIncompatible
. By doing so you can decide the fallback for storing the credentials, such as using the regularCredentialsManager
.
- Why is the Android Lint error
'InvalidPackage'
considered a warning?
When building the project with build
, an error appeared regarding an invalid package
on the okio
dependency. This snippet is in the build.gradle
file so that the build runs fine:
android {
//...
lintOptions {
warning 'InvalidPackage'
}
}
The rules should be applied automatically if your application is using minifyEnabled = true
. If you want to include them manually check the proguard directory.
By default you should at least use the following files:
proguard-okio.pro
proguard-gson.pro
Auth0 helps you to:
- Add authentication with multiple authentication sources, either social like Google, Facebook, Microsoft Account, LinkedIn, GitHub, Twitter, Box, Salesforce, among others, or enterprise identity systems like Windows Azure AD, Google Apps, Active Directory, ADFS or any SAML Identity Provider.
- Add authentication through more traditional username/password databases.
- Add support for linking different user accounts with the same user.
- Support for generating signed Json Web Tokens to call your APIs and flow the user identity securely.
- Analytics of how, when and where users are logging in.
- Pull data from other sources and add it to the user profile, through JavaScript rules.
- Go to Auth0 and click Sign Up.
- Use Google, GitHub or Microsoft Account to login.
If you have found a bug or if you have a feature request, please report them at this repository issues section. Please do not report security vulnerabilities on the public GitHub issue tracker. The Responsible Disclosure Program details the procedure for disclosing security issues.
This project is licensed under the MIT license. See the LICENSE file for more info.