mitchtabian/dagger-examples

Some dagger-android examples with Retrofit2, MVVM architecture, RxJava, (Java)

Dagger2 on Android

Watch the app demo.

This course contains Dagger2 examples with Retrofit2, MVVM architecture, Android Jetpack's Navigation component, & more. (Java)

Here's what you will see in the course:

• Every line of code is written and explained on video
• Dagger version 2.2+ (Focus on Dagger-Android)
• Dagger-android basics:
  1. DaggerApplication
  2. DaggerAppCompatActivity
  3. DaggerFragment
• @Provides, @Binds, @BindsInstance explanation
• Map Multibinding
• Subcomponents
• Scopes
• Custom Scopes
• @ContributesAndroidInjector
• Activity Injection
• Fragment Injection
• ViewModel Injection
• Retrofit2 and Dagger
• Proper MVVM Architecture (Model View View-Model)
• An intro to the new Jetpack Navigation Component library
• And much more...

The course is free and available on codingwithmitch.com

dagger-examples's Issues

BaseApplication DaggerAppComponent missin

In Application class return DaggerAppComponent.builder().application(this).build()
there is no DaggerAppComponent.builder in di folder.

Without ViewModelFactoryModule, AuthViewModel is still injected properly.

Hello!
Please checkout the branch map-multibindings-and-viewmodels first!!

I commented out all the ViewModelFactoryModule class code and excluded the module from the AppComponent. And the AuthViewModel is still injected!!

Does anyone know why????

Unable to start activity

Process: com.codingwithmitch.daggerpractice, PID: 26854
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.codingwithmitch.daggerpractice/com.codingwithmitch.daggerpractice.ui.auth.AuthActivity}: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2913)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
Caused by: android.view.InflateException: Binary XML file line #2: Error inflating class androidx.constraintlayout.widget.ConstraintLayout
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:343)
at android.view.LayoutInflater.createView(LayoutInflater.java:647)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140)
at com.codingwithmitch.daggerpractice.ui.auth.AuthActivity.onCreate(AuthActivity.java:56)
at android.app.Activity.performCreate(Activity.java:7136)
at android.app.Activity.performCreate(Activity.java:7127)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/constraintlayout/widget/R$styleable;
at androidx.constraintlayout.widget.ConstraintLayout.init(ConstraintLayout.java:590)
at androidx.constraintlayout.widget.ConstraintLayout.(ConstraintLayout.java:567)
at java.lang.reflect.Constructor.newInstance0(Native Method) 
at java.lang.reflect.Constructor.newInstance(Constructor.java:343) 
at android.view.LayoutInflater.createView(LayoutInflater.java:647) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:492) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:469) 
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:140) 
at com.codingwithmitch.daggerpractice.ui.auth.AuthActivity.onCreate(AuthActivity.java:56) 
at android.app.Activity.performCreate(Activity.java:7136) 
at android.app.Activity.performCreate(Activity.java:7127) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1271) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2893) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3048) 
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1808) 
at android.os.Handler.dispatchMessage(Handler.java:106) 
at android.os.Looper.loop(Looper.java:193) 
at android.app.ActivityThread.main(ActivityThread.java:6669) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858) 
2019-05-01 13:15:38.880 26854-26854/com.codingwithmitch.daggerpractice E/AndroidRuntime: Caused by: java.lang.ClassNotFoundException: Didn't find class "androidx.constraintlayout.widget.R$styleable" on path: DexPathList[[zip file "/data/app/com.codingwithmitch.daggerpractice-8dY1Ivj3E9JqpAY_NtqYyA==/base.apk"],nativeLibraryDirectories=[/data/app/com.codingwithmitch.daggerpractice-8dY1Ivj3E9JqpAY_NtqYyA==/lib/x86, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
... 28 more

[Fixed]Crash app Drawable-v24, i need explan why?

I don't know why? but it can fix by move all files in drawable-v24 to drawable.

Error report:

12-21 12:58:13.054 10546-10546/com.codingwithmitch.daggerpractice E/AndroidRuntime: FATAL EXCEPTION: main Process: com.codingwithmitch.daggerpractice, PID: 10546 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.codingwithmitch.daggerpractice/com.codingwithmitch.daggerpractice.ui.auth.AuthActivity}: android.content.res.Resources$NotFoundException: Resource ID #0x7f070072 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2416) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) at android.app.ActivityThread.-wrap11(ActivityThread.java) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:148) at android.app.ActivityThread.main(ActivityThread.java:5417) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) Caused by: android.content.res.Resources$NotFoundException: Resource ID #0x7f070072 at android.content.res.Resources.getValue(Resources.java:1351) at android.content.res.Resources.getDrawable(Resources.java:804) at android.content.Context.getDrawable(Context.java:458) at androidx.core.content.ContextCompat.getDrawable(ContextCompat.java:454) at com.codingwithmitch.daggerpractice.di.AppModule.provideAppDrawable(AppModule.java:55) at com.codingwithmitch.daggerpractice.di.AppModule_ProvideAppDrawableFactory.provideAppDrawable(AppModule_ProvideAppDrawableFactory.java:29) at com.codingwithmitch.daggerpractice.di.AppModule_ProvideAppDrawableFactory.get(AppModule_ProvideAppDrawableFactory.java:19) at com.codingwithmitch.daggerpractice.di.AppModule_ProvideAppDrawableFactory.get(AppModule_ProvideAppDrawableFactory.java:10) at dagger.internal.DoubleCheck.get(DoubleCheck.java:47) at com.codingwithmitch.daggerpractice.di.DaggerAppComponent$AuthActivitySubcomponentImpl.injectAuthActivity(DaggerAppComponent.java:269) at com.codingwithmitch.daggerpractice.di.DaggerAppComponent$AuthActivitySubcomponentImpl.inject(DaggerAppComponent.java:259) at com.codingwithmitch.daggerpractice.di.DaggerAppComponent$AuthActivitySubcomponentImpl.inject(DaggerAppComponent.java:222) at dagger.android.DispatchingAndroidInjector.maybeInject(DispatchingAndroidInjector.java:113) at dagger.android.DispatchingAndroidInjector.inject(DispatchingAndroidInjector.java:134) at dagger.android.AndroidInjection.inject(AndroidInjection.java:59) at dagger.android.support.DaggerAppCompatActivity.onCreate(DaggerAppCompatActivity.java:43) at com.codingwithmitch.daggerpractice.ui.auth.AuthActivity.onCreate(AuthActivity.java:55) at android.app.Activity.performCreate(Activity.java:6237) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)  at android.app.ActivityThread.-wrap11(ActivityThread.java)  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)  at android.os.Handler.dispatchMessage(Handler.java:102)  at android.os.Looper.loop(Looper.java:148)  at android.app.ActivityThread.main(ActivityThread.java:5417)  at java.lang.reflect.Method.invoke(Native Method)  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

Kotlin support

Hi, first of all, that's a great sample and I really appreciate your effort in it.

So, I'm trying to build an application which is very similar to your sample, however it won't build. It's written in Kotlin btw. I just wonder if you would be able to help?

I keep getting this error and I can't figure it out:

AppComponent.java:8: error: [Dagger/MissingBinding] java.util.Map<java.lang.Class<? extends androidx.lifecycle.ViewModel>,javax.inject.Provider<androidx.lifecycle.ViewModel>> cannot be provided without an @Provides-annotated method. public abstract interface AppComponent extends dagger.android.AndroidInjector<com.vrify.vrify.VrifyApp> { ^ java.util.Map<java.lang.Class<? extends androidx.lifecycle.ViewModel>,javax.inject.Provider<androidx.lifecycle.ViewModel>> is injected at com.vrify.vrify.core.viewmodel.ViewModelFactory(creators) com.vrify.vrify.core.viewmodel.ViewModelFactory is injected at com.vrify.vrify.core.di.ViewModelFactoryModule.bindViewModelFactory(factory) androidx.lifecycle.ViewModelProvider.Factory is injected at com.vrify.vrify.discover.ui.CompanyListFragment.viewModelFactory com.vrify.vrify.discover.ui.CompanyListFragment is injected at dagger.android.AndroidInjector.inject(T) [com.vrify.vrify.core.AppComponent → com.vrify.vrify.core.di.MainActivityBuildersModule_ContributeMainActivity.MainActivitySubcomponent → com.vrify.vrify.discover.di.MainActivityFragmentBuildersModule_ContributeCompanyListFragment.CompanyListFragmentSubcomponent]

Take care

Error during ViewModel multibinding

error: [Dagger/MissingBinding] java.util.Map<java.lang.Class<? extends androidx.lifecycle.ViewModel>,? extends javax.inject.Provider<androidx.lifecycle.ViewModel>> cannot be provided without an @Provides-annotated method.

ViewModelProviderFactory is null

Hello everybody,

I just tried to follow the steps of this tutorial and wanted to fix the deprecated code for "ViewModelProviders.of()" by doing it this way:

    super.onCreate(savedInstanceState);
    mBinding = DataBindingUtil.setContentView(this, R.layout.activity_auth);
    Log.d(TAG, "onCreate: is app null ? " + isAppNull);
    viewModel = new ViewModelProvider(this, viewModelProviderFactory).get(AuthViewModel.class);

The problem is, that my ViewModelProviderFactory is null.
If I try to call .toString() I get the same problem.
This means, also in the deprecated way my ViewModelProviderFactory is still null. The constructor is never accessed and I'm not sure, if it's doing anything.

Anyone the same problems?