Moxy 2 is out! Check out the migration guide and give it a try!
Moxy is a library that allows for hassle-free implementation of the MVP pattern in an Android Application. Without troubles of lifecycle and boilerplate code!
Illustration of how Moxy is working:
Moxy has a few killer features:
View interface
interface MainView : MvpView {
@AddToEndSingle
fun displayUser(user: User)
}
class MainActivity : MvpAppCompatActivity(R.layout.activity_main), MainView {
private val presenter by moxyPresenter { MainPresenter() }
override fun displayUser(user: User) {
userLayout.showUser(user)
}
}
Presenter
class MainPresenter : MvpPresenter<MainView>() {
override fun onFirstViewAttach() {
viewState.showUser(getCurrentUser())
}
}
@Inject
lateinit var presenterProvider: Provider<MainPresenter>
private val presenter by moxyPresenter { presenterProvider.get() }
@InjectPresenter
MainPresenter presenter;
@Inject
Provider<MainPresenter> presenterProvider;
@ProvidePresenter
MainPresenter providePresenter() {
return presenterProvider.get();
}
We will change this template in future In order to avoid tedious task of writing boilerplate code for binding activities, fragments and its presentation parts, we recommend use of Android Studio templates for Moxy.
Telegram channels from original moxy community
Telegram channel (en)
Telegram channel (ru)
Please replace moxyVersion
with the latest version number:
dependencies {
// ...
implementation "com.github.moxy-community:moxy:$moxyVersion"
annotationProcessor "com.github.moxy-community:moxy-compiler:$moxyVersion"
}
apply plugin: 'kotlin-kapt'
// ...
dependencies {
// ...
implementation "com.github.moxy-community:moxy:$moxyVersion"
kapt "com.github.moxy-community:moxy-compiler:$moxyVersion"
}
Moxy uses Java 8 features, so you also need to specify source and target compatibility for each Module that uses Moxy:
android {
...
// For Java projects
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
// For Kotlin projects
kotlinOptions {
jvmTarget = "1.8"
}
}
For additional base view classes MvpActivity
and MvpFragment
add this:
implementation "com.github.moxy-community:moxy-android:$moxyVersion"
If you are using AppCompat, you'll need MvpAppCompatActivity
and MvpAppCompatFragment
classes. Add this:
implementation "com.github.moxy-community:moxy-app-compat:$moxyVersion"
If you're using AndroidX, you'll need a different implementation for MvpAppCompatActivity
and MvpAppCompatFragment
classes. Use this one:
implementation "com.github.moxy-community:moxy-androidx:$moxyVersion"
If you're using Google material, use MvpBottomSheetDialogFragment
and add this:
implementation "com.github.moxy-community:moxy-material:$moxyVersion"
Declare presenters in your views using property delegate:
class MyFragment: MvpFragment() {
...
private val presenter by moxyPresenter { presenterProvider.get() }
...
}
Launch coroutines in presenter scope:
class MyPresenter : MvpPresenter<MvpView>() {
override fun onFirstViewAttach() {
presenterScope.launch {
// Coroutine that will be canceled when presenter is destroyed
}
}
}
To use MvpDelegateHolder.moxyPresenter
and MvpPresenter.presenterScope
, add this:
implementation "com.github.moxy-community:moxy-ktx:$moxyVersion"
By default, each MvpView
method must have an annotation @StateStrategyType
.
In the version 1 of Moxy it was allowed to omit stategies for methods. In this case a default strategy was applied.
You can fallback to the old behavior. To do this, set the disableEmptyStrategyCheck
parameter to true.
disableEmptyStrategyCheck : 'true'
In this case the default strategy will be AddToEndSingleStrategy
. In the old version the default strategy was AddToEndStrategy
.
To change default strategy provide for the defaultMoxyStrategy
parameter a full class name of the new default strategy.
defaultMoxyStrategy : 'moxy.viewstate.strategy.OneExecutionStateStrategy'
If the compiler finds MvpView
method without the @StateStrategyType
annotation, it'd show an error via standard method for notifying about compilation problems. For ease of migration from older versions we have provided an additional mechanism: EmptyStrategyHelper
.
It collects all the errors associated with an empty strategy in one place. Using it, you can easily navigate from the EmptyStrategyHelper
directly to the method with a missing strategy.
To switch the error output method enable this option
enableEmptyStrategyHelper : 'true'
To enable Isolating
incremental annotation processor mode for Moxy processor use this option
moxyEnableIsolatingProcessing : 'true'
Use this option for faster incremental builds. You can read about differences between Isolating
and Aggreagating
modes and Gradle incremental annotation processing support in Gradle documentation.
Warning! This option is experimental for now. It should work fine, but we prefer to make this transition as safe as possible. If you'll encounter compilation problems after enabling this option, please feel free to report an ussue. Hopefully we will enable isolating annotation processor mode by default after several releases.
How to correctly use compilation flags check out the sample-app build.gradle file
This plugin automates work with strategies You can download it here https://plugins.jetbrains.com/plugin/13679-moxy-strategy/versions developing here https://github.com/Maksim-Novikov/moxy-strategy-plugin
If you are using R8 then no additional configuration required. If you use ProGuard then you have to manually add rules from this file.
Brave people who created the library:
@senneco
@jordan1997
@xanderblinov
@VovaStelmashchuk
@aasitnikov
@alaershov
@bejibx
@katkoff
@ekursakov
@SavinMike
@sychyow
@AlexeyKorshun
@dmdevgo
@rsajob
@terrakok
@mohaxspb
@CherryPerry
@fl1pflops
@phoenixxt
@Dosssik
@AcoustickSan
@seven332
@v-grishechko
@sbogolepov
@A-Zaiats
@lion4ik
@NotPerfectBlue
@IlyaGulya
@Svechnikov
@hram
@ValdZX
@Maksim-Novikov
You may also find them in contributors page of the old project
Install code style to your IntelliJ or Android Studio. MoxyAndroid.xml
For import file use or Mac OS:
Preferences -> Editor -> Code style -> Scheme -> Import Scheme -> IntelliJ IDEA code style XML -> choose the MoxyAndroid.xml
file in finder
The MIT License (MIT)
Copyright (c) 2019 Moxy Community
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.