Mobile Kotlin runtime permissions multiplatform controller

moko-permissions - Kotlin MultiPlatform library for providing runtime permissions on iOS & Android.

Table of Contents

• Features
• Requirements
• Installation
• List of supported permissions
• Usage
• Samples
• Set Up Locally
• Contributing
• License

Features

• Permission - enumeration with primary types of device permissions
• PermissionsController - handler for runtime permission requests can be used in the common code with lifecycle safety for Android
• DeniedException and DeniedAlwaysException - exceptions to handle user denial of permissions
• Compose Multiplatform support

Requirements

• Gradle version 6.8+
• Android API 16+
• iOS version 12.0+

Installation

root build.gradle

allprojects {
    repositories {
      mavenCentral()
    }
}

project build.gradle

dependencies {
    commonMainApi("dev.icerock.moko:permissions:0.18.0")
    
    // compose multiplatform
    commonMainApi("dev.icerock.moko:permissions-compose:0.18.0") // permissions api + compose extensions
    
    commonTestImplementation("dev.icerock.moko:permissions-test:0.18.0")
}

List of supported permissions

The full list can be found in dev.icerock.moko.permissions.Permission enum.

• Camera: Permission.CAMERA
• Gallery: Permission.GALLERY
• Storage read: Permission.STORAGE
• Storage write: Permission.WRITE_STORAGE
• Fine location: Permission.LOCATION
• Coarse location: Permission.COARSE_LOCATION
• Background location: Permission.BACKGROUND_LOCATION
• Remote notifications: Permission.REMOTE_NOTIFICATION
• Audio recording: Permission.RECORD_AUDIO
• Bluetooth LE: Permission.BLUETOOTH_LE
• Bluetooth Scan: Permission.BLUETOOTH_SCAN
• Bluetooth Connect: Permission.BLUETOOTH_CONNECT
• Bluetooth Advertise: Permission.BLUETOOTH_ADVERTISE
• Contacts: Permission.CONTACTS
• Motion: Permission.MOTION

Usage

Common code:

class ViewModel(val permissionsController: PermissionsController): ViewModel() {
    fun onPhotoPressed() {
        viewModelScope.launch {
            try {
                permissionsController.providePermission(Permission.GALLERY)
                // Permission has been granted successfully.
            } catch(deniedAlways: DeniedAlwaysException) {
                // Permission is always denied.
            } catch(denied: DeniedException) {
                // Permission was denied.
            }
        }
    }
}

Android:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
        
    val viewModel = getViewModel {
        // Pass the platform implementation of the permission controller to a common code.
        ViewModel(PermissionsController())
    }
    
    // Binds the permissions controller to the activity lifecycle.
    viewModel.permissionsController.bind(activity)
}

Compose:

@Composable
fun TestScreen() {
    val viewModel = getViewModel {
        // Pass the platform implementation of the permission controller to a common code.
        ViewModel(PermissionsController())
    }
    
    // Binds the permissions controller to the LocalLifecycleOwner lifecycle.
    BindEffect(viewModel.permissionsController)
}

iOS:

// Just pass the platform implementation of the permission controller to a common code.
let viewModel = ViewModel(permissionsController: PermissionsController())

Compose Multiplatform

@Composable
fun Sample() {
    val factory: PermissionsControllerFactory = rememberPermissionsControllerFactory()
    val controller: PermissionsController = remember(factory) { factory.createPermissionsController() }
    val coroutineScope: CoroutineScope = rememberCoroutineScope()
    
    Button(
        onClick = {
            coroutineScope.launch {
                controller.providePermission(Permission.REMOTE_NOTIFICATION)
            }
        }
    ) {
        Text(text = "give permissions")
    }
}

Or with moko-mvvm with correct configuration change handle on android:

@Composable
fun Sample() {
    val factory: PermissionsControllerFactory = rememberPermissionsControllerFactory()
    val viewModel: PermissionsViewModel = getViewModel(
        key = "permissions-screen",
        factory = viewModelFactory { PermissionsViewModel(factory.createPermissionsController()) }
    )
    
    BindEffect(viewModel.permissionsController)

    Button(onClick = viewModel::onButtonClick) {
        Text(text = "give permissions")
    }
}

class PermissionsViewModel(
    val permissionsController: PermissionsController
) : ViewModel() {
    fun onButtonClick() {
        viewModelScope.launch {
            permissionsController.providePermission(Permission.REMOTE_NOTIFICATION)
        }
    }
}

Samples

More examples can be found in the sample directory.

Set Up Locally

• In permissions directory contains permissions library;
• In sample directory contains samples on android, ios & mpp-library connected to apps.

Contributing

All development (both new features and bug fixes) is performed in develop branch. This way master sources always contain sources of the most recently released version. Please send PRs with bug fixes to develop branch. Fixes to documentation in markdown files are an exception to this rule. They are updated directly in master.

The develop branch is pushed to master during release.

More detailed guide for contributers see in contributing guide.

License

Copyright 2019 IceRock MAG Inc

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.