Shizuku API is the API provided by Shizuku and Sui. With Shizuku API, you can call your Java/JNI code with root/shell (ADB) identity.
To use Shizuku APIs, you need to guide the user to install Shizuku or Sui first. Both of them require Android 6.0+.
Shizuku is a standard Android application. You can guide the users to download Shizuku from https://shizuku.rikka.app/download/. Shizuku works for both rooted and non-rooted devices.
On non-rooted devices, Shizuku needs to be manually restarted with adb every time on boot. Before Android 11, a computer is required to run adb. Android 11 and above have built-in wireless debugging support, and users can start Shizuku directly on the device.
Sui is a Magisk module. Magisk requires an unlocked bootloader.
No additional setup is required except for the installation. You can guide the rooted users (searching su
in PATH
is enough) to download Sui from Magisk or https://github.com/RikkaApps/Sui.
A demo project is provided. See demo for more.
I'll say the difficult words first, using Shizuku APIs is similar to framework or system app development, some experience in developing common applications may not be enough. You have to get used to digging into Android source code to find out how things work, cs.android.com and AndroidXref sites will be your best friend.
def shizuku_version = (the version above)
implementation "dev.rikka.shizuku:api:$shizuku_version"
// Add this line if you want to support Shizuku
implementation "dev.rikka.shizuku:provider:$shizuku_version"
The first step is to acquire the Binder from Shizuku or Sui.
Shizuku
class provides listeners, Shizuku#addBinderReceivedListener()
and Shizuku.addBinderDeadListener()
, that allows you to track the life of the binder. You should call methods in Shizuku
class when the binder is alive or you will get an IllegalStateException
.
The steps to get a Binder from Sui and Shizuku are different.
Call Sui.init(packageName)
before using Shizuku
class. This method only needs to be called once. If this method returns true, means Sui is installed and available.
For multi-process applications, call this method in every process that needs to use Shizuku API.
Note, request the binder for Sui only requires two times of binder IPC, this is significantly cheaper than initialize Shizuku which uses ContentProvider
. Sui.init(packageName)
can be used in main thread, you don't need to worry about performance.
Add ShizukuProvider
to AndroidManifest.xml
.
<provider
android:name="rikka.shizuku.ShizukuProvider"
android:authorities="${applicationId}.shizuku"
android:multiprocess="false"
android:enabled="true"
android:exported="true"
android:permission="android.permission.INTERACT_ACROSS_USERS_FULL" />
<!-- android:permission="android.permission.INTERACT_ACROSS_USERS_FULL" is to protect this provider from accessing by normal apps -->
For multi-process applications, you need to call ShizukuProvider.enableMultiProcessSupport()
in every process which needs to use Shizuku API.
Starting from v12.1.0, Sui is initialized automatically in ShizukuProvider
. You can opt-out this behavior by calling ShizukuProvider#disableAutomaticSuiInitialization()
before ShizukuProvider#onCreate()
is called. Unless there are special reasons, apps that support Shizuku should also support Sui, otherwise it will cause user confusion.
Requesting permission is similar to requesting runtime permissions.
A simple example of requesting permission:
private void onRequestPermissionsResult(int requestCode, int grantResult) {
boolean granted = grantResult == PackageManager.PERMISSION_GRANTED;
// Do stuff based on the result and the request code
}
private final Shizuku.OnRequestPermissionResultListener REQUEST_PERMISSION_RESULT_LISTENER = this::onRequestPermissionsResult;
@Override
protected void onCreate(Bundle savedInstanceState) {
// ...
Shizuku.addRequestPermissionResultListener(REQUEST_PERMISSION_RESULT_LISTENER);
// ...
}
@Override
protected void onDestroy() {
// ...
Shizuku.removeRequestPermissionResultListener(REQUEST_PERMISSION_RESULT_LISTENER);
// ...
}
private boolean checkPermission(int code) {
if (Shizuku.isPreV11()) {
// Pre-v11 is unsupported
return false;
}
if (Shizuku.checkSelfPermission() == PackageManager.PERMISSION_GRANTED) {
// Granted
return true;
} else if (Shizuku.shouldShowRequestPermissionRationale()) {
// Users choose "Deny and don't ask again"
return false;
} else {
// Request the permission
Shizuku.requestPermission(code);
return false;
}
}
Shizuku can be started with ADB or ROOT, and Sui is a Magisk module, so the privilege could be ADB or ROOT. You can use Shizuku#getUid()
to check your privilege, for ROOT it returns 0
, for ADB is 2000
.
What ADB can do is significantly different from ROOT:
In the Android world, the privilege is determined by Android permissions. See AndroidManifest of Shell, all the permission granted to Shell (ADB) are listed here. Be aware, the permission changes under different Android versions.
In Linux world, the privilege is determined by Shell's uid, capabilities, SELinux context, etc. For example, Shell (ADB) cannot access other apps' data files /data/user/0/<package>
.
This is a relatively simple way, but what you can do is limited to Binder calls. Therefore, this is only suitable for simple applications.
Shizuku API provides rikka.shizuku.ShizukuBinderWrapper
class which forward Binder calls to Shizuku service which has ADB or ROOT privilege.
User Service is like Bound services which allows you to run Java or native codes (through JNI). The difference is that the service runs in a different process and as the identity (Linux UID) of root (UID 0) or shell (UID 2000, if the backend is Shizuku and user starts Shizuku with adb).
There are no restrictions on non-SDK APIs in the user service process. However, the User Service process is not a valid Android application process. Therefore, even if you can acquire a Context
instance, many APIs, such as Context#registerReceiver
and Context#getContentResolver
will not work. You will need to dig into Android source code to find out how things work.
Be aware that, to let the service to use the latest code, "Run/Debug configurations" - "Always install with package manager" in Android Studio should be checked.
Start the User Service
Use bindUserService
method. This method has two parameters, UserServiceArgs
and ServiceConnection
.
UserServiceArgs
is like Intent
in Bound services, which decides which service will be started and some options.
ServiceConnection
is same as Bound services, but only onServiceConnected
and onServiceDisconnected
are used.
Unlike Bound service, the service class must implement IBinder
interface. The usual usage is public class YourService extends IYouAidlInterface.Stub
.
The service class can have two constructors, one is default constructor, another is with Context
parameter available from Shizuku v13. Shizuku v13 will try the constructor with Context
parameter first. Older Shizuku will always use the default constructor. Beaware that the Context
does not work as same as Context
in normal Android application. See "Use Android APIs in user service" below.
Shizuku uses tag
from UserServiceArgs
to determine if the User Service is same. If tag
is not set, class name will be uses, but class name is unstable after ProGuard/R8. If version
from UserServiceArgs
mismatches, a new User Service will be start and "destroy" method (see below) will be called for the old.
Stop the User Service
Use unbindUserService
method. However, the user service process will NOT be killed automatically. You need to implement a "destroy" method in your service. The transaction code for that method is 16777115
(use 16777114
in aidl). In this method, you can do some cleanup jobs and call System.exit()
in the end.
For "Remote binder call", as the APIs are accessed from the app's process, you may need to use AndroidHiddenApiBypass or any ways you want to bypass restrictions on non-SDK interfaces.
We also provides HiddenApiRefinePlugin to help you to programing with hidden APIs conveniently.
ShizukuProvider#requestBinderForNonProviderProcess
crash on Android 14 (for apps targeting Android 14)ShizukuServiceConnection
if the server is new enoughShizuku#unbindUserService(remove=false)
does not actually remove the callbackCopyOnWriteArrayList#removeIf
, as using it with coreLibraryDesugaring
enabled will crash on Android 8+Fix Shizuku#removeXXXListener
will crash on Android 7.1 and earlier versions
This is caused by CopyOnWriteArrayList#removeIf
is not supported (throw an UnsupportedOperationException
) before Android 8.0. Please note, using coreLibraryDesugaring
will NOT fix this issue at least in version 2.0.3
.
Prepare to remove Shizuku#newProcess
, developers should have to use UserService
instead
First, this is already announced two years ago.
For those who don't understand, UserService
gives the developer the ability to run their own codes in a different process with root or shell privilege. This is much more powerful than just executing a command. UserService
can replace newProcess
in all cases.
Also, newProcess
uses texts to communicate , which is not efficient and unreliable. If there are apps that only uses newProcess
to implement its functions, it loses most of the advantage of using Shizuku.
Finally, newProcess
lacks tty support, it is not possible to implement an interactive shell with it. And we already has rish
that allows users to run an interactive shell with privilege in any terminal app they like.
Handler
parameter that determines which thread will the listener be called fromUserService
can have a Context
parameter which value is the Context
used to create the instance of UserService
onServiceDisconnected
is not called if the UserService is stopped by Shizuku#unbindUserService
Automatically initialize Sui if you are using Shizuku
You can opt-out this behavior by calling ShizukuProvider#disableAutomaticSuiInitialization()
before ShizukuProvider#onCreate()
is called
Added a lot more detailed document for most APIs
Drop pre-v11 support
You don't need to worry about this problem, just show a "not supported" message if the user really uses pre-v11.
Shizuku#peekUserService
that allows you to check if a specific user service is runningShizuku.UserServiceArgs#daemon
that allows you to control if the user service should be run in the "Daemon mode"