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# Built application files | ||
*.apk | ||
*.ap_ | ||
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# Files for the ART/Dalvik VM | ||
*.dex | ||
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# Java class files | ||
*.class | ||
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# Generated files | ||
bin/ | ||
gen/ | ||
out/ | ||
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# Gradle files | ||
.gradle/ | ||
build/ | ||
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# Local configuration file (sdk path, etc) | ||
local.properties | ||
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# Proguard folder generated by Eclipse | ||
proguard/ | ||
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# Log Files | ||
*.log | ||
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# Android Studio Navigation editor temp files | ||
.navigation/ | ||
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# Android Studio captures folder | ||
captures/ | ||
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# Intellij | ||
*.iml | ||
.idea/workspace.xml | ||
.idea/tasks.xml | ||
.idea/gradle.xml | ||
.idea/dictionaries | ||
.idea/libraries | ||
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# External native build folder generated in Android Studio 2.2 and later | ||
.externalNativeBuild | ||
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# Freeline | ||
freeline.py | ||
freeline/ | ||
freeline_project_description.json | ||
/.idea/ | ||
/keystore.properties | ||
/app/fabric.properties |
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##Purpose of the project | ||
Purpose of this project is to showcase an example of Android application architecture with focus on Clean Architecture. It also provides a useful template that all future projects should implement in order to achieve better consistency among them. | ||
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## Why Clean architecture | ||
There are few well-known arhitectural patterns like MVC, MVP or MVVM that provide elegant solutions to separating application's UI code from the rest of the project. While in some cases it can be enough, we wanted to create a consistent architecture throughout whole application and not only in the presentation layer. | ||
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##How is it implemented | ||
![Clean architecture onion diagram](https://blog.cleancoder.com/uncle-bob/images/2012-08-13-the-clean-architecture/CleanArchitecture.jpg) | ||
Onion diagram above is Uncle Bob's well-known representation of Clean Architecture and it is the basis for this showcase project. | ||
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###Layers / modules | ||
As you can see on the diagram above application's code is separated into 4 layers. We will represent these 4 layers as 3 modules in our project, merging Entities and Use Cases from the diagram into one Domain layer. Project structure is then divided into: | ||
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* **app** module | ||
* **domain** module | ||
* **data** module | ||
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####App module | ||
We have left default name for this one. This module contains all of the code related to the UI/Presentation layer. This includes things like Activities, Fragments and ViewModels. | ||
We'll use MVVM arhitectural pattern to separate our UI from the rest of the app. Presentation layer is built using Android Architecture Components: ViewModels, Lifecycle and LiveData elements. | ||
These components are also used throughout the rest of the application, thus helping us in making whole application somewhat reactive. | ||
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####Domain module | ||
Domain module contains application's business logic. This is the core part of every app and it should be clear what project is all about just by looking at these files/classes. This module should also be independent of any framework. That's why it is the innermost layer in Uncle Bob's onion diagram. Following the dependency rule this module shouldn't depend on anything from **app** or **data** module. We will hold our Use Cases and business models in this module. We'll also store repository abstractions in this module. This allows us to communicate with the rest of the application following The Dependency Inversion Principle. | ||
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####Data module | ||
Data module holds all concrete implementations of our repositories and other data sources like databases or network, split into corresponding packages. Every data source holds its own model classes. Before sending data further into the domain layer we are going to map it into business models. This step will help us filter out data that is not valid or may not be used further in the app. | ||
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/build |
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apply plugin: 'com.android.application' | ||
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apply plugin: 'kotlin-android' | ||
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apply plugin: 'kotlin-android-extensions' | ||
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android { | ||
compileSdkVersion 28 | ||
defaultConfig { | ||
applicationId "com.cobeisfresh.template" | ||
minSdkVersion 21 | ||
targetSdkVersion 28 | ||
versionCode 1 | ||
versionName "1.0" | ||
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner" | ||
} | ||
buildTypes { | ||
release { | ||
minifyEnabled false | ||
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro' | ||
} | ||
} | ||
} | ||
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dependencies { | ||
implementation project(":domain") | ||
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implementation fileTree(dir: 'libs', include: ['*.jar']) | ||
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version" | ||
implementation 'androidx.appcompat:appcompat:1.0.2' | ||
implementation 'androidx.core:core-ktx:1.0.2' | ||
implementation 'com.google.android.material:material:1.0.0' | ||
implementation 'androidx.annotation:annotation:1.1.0' | ||
implementation 'androidx.constraintlayout:constraintlayout:1.1.3' | ||
implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0' | ||
testImplementation 'junit:junit:4.12' | ||
androidTestImplementation 'androidx.test:runner:1.2.0' | ||
androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0' | ||
} |
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# Add project specific ProGuard rules here. | ||
# You can control the set of applied configuration files using the | ||
# proguardFiles setting in build.gradle. | ||
# | ||
# For more details, see | ||
# http://developer.android.com/guide/developing/tools/proguard.html | ||
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# If your project uses WebView with JS, uncomment the following | ||
# and specify the fully qualified class name to the JavaScript interface | ||
# class: | ||
#-keepclassmembers class fqcn.of.javascript.interface.for.webview { | ||
# public *; | ||
#} | ||
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# Uncomment this to preserve the line number information for | ||
# debugging stack traces. | ||
#-keepattributes SourceFile,LineNumberTable | ||
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# If you keep the line number information, uncomment this to | ||
# hide the original source file name. | ||
#-renamesourcefileattribute SourceFile |
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app/src/androidTest/java/com/cobeisfresh/ExampleInstrumentedTest.kt
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package com.cobeisfresh | ||
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import androidx.test.InstrumentationRegistry | ||
import androidx.test.runner.AndroidJUnit4 | ||
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import org.junit.Test | ||
import org.junit.runner.RunWith | ||
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import org.junit.Assert.* | ||
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/** | ||
* Instrumented test, which will execute on an Android device. | ||
* | ||
* See [testing documentation](http://d.android.com/tools/testing). | ||
*/ | ||
@RunWith(AndroidJUnit4::class) | ||
class ExampleInstrumentedTest { | ||
@Test | ||
fun useAppContext() { | ||
// Context of the app under test. | ||
val appContext = InstrumentationRegistry.getTargetContext() | ||
assertEquals("com.cobeisfresh", appContext.packageName) | ||
} | ||
} |
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<?xml version="1.0" encoding="utf-8"?> | ||
<manifest xmlns:android="http://schemas.android.com/apk/res/android" | ||
xmlns:tools="http://schemas.android.com/tools" | ||
package="com.cobeisfresh.template"> | ||
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<application | ||
android:name=".App" | ||
android:allowBackup="true" | ||
android:icon="@mipmap/ic_launcher" | ||
android:label="@string/app_name" | ||
android:roundIcon="@mipmap/ic_launcher_round" | ||
android:supportsRtl="true" | ||
android:theme="@style/AppTheme" | ||
tools:ignore="GoogleAppIndexingWarning"> | ||
<activity android:name=".ui.weather.view.WeatherActivity"> | ||
</activity> | ||
<activity android:name=".ui.weather.view.NewsActivity"> | ||
<intent-filter> | ||
<action android:name="android.intent.action.MAIN" /> | ||
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<category android:name="android.intent.category.LAUNCHER" /> | ||
</intent-filter> | ||
</activity> | ||
</application> | ||
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</manifest> |
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package com.cobeisfresh.template | ||
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import android.app.Application | ||
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class App : Application() { | ||
} |
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app/src/main/java/com/cobeisfresh/template/ui/weather/base/BaseActivity.kt
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package com.cobeisfresh.template.ui.weather.base | ||
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import android.os.Bundle | ||
import android.os.PersistableBundle | ||
import androidx.appcompat.app.AppCompatActivity | ||
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abstract class BaseActivity : AppCompatActivity() { | ||
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override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) { | ||
super.onCreate(savedInstanceState, persistentState) | ||
setContentView(getLayout()) | ||
} | ||
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abstract fun getLayout(): Int | ||
} |
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app/src/main/java/com/cobeisfresh/template/ui/weather/base/BaseFragment.kt
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package com.cobeisfresh.template.ui.weather.base | ||
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import android.os.Bundle | ||
import android.view.LayoutInflater | ||
import android.view.View | ||
import android.view.ViewGroup | ||
import androidx.fragment.app.Fragment | ||
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abstract class BaseFragment : Fragment() { | ||
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override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? { | ||
return inflater.inflate(getLayout(), container, false) | ||
} | ||
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override fun onViewCreated(view: View, savedInstanceState: Bundle?) { | ||
super.onViewCreated(view, savedInstanceState) | ||
viewReady() | ||
} | ||
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abstract fun viewReady() | ||
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abstract fun getLayout(): Int | ||
} |
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app/src/main/java/com/cobeisfresh/template/ui/weather/base/ViewState.kt
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package com.cobeisfresh.template.ui.weather.base | ||
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import com.cobeisfresh.template.ui.weather.base.ViewState.Status.* | ||
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data class ViewState<T>(val status: Status, val data: T?, val error: Throwable?) { | ||
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enum class Status { | ||
SUCCESS, ERROR, LOADING | ||
} | ||
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companion object { | ||
fun <T> success(data: T) = ViewState(SUCCESS, data, null) | ||
fun error(error: Throwable) = ViewState(ERROR, null, error) | ||
fun loading() = ViewState(LOADING, null, null) | ||
} | ||
} |
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app/src/main/java/com/cobeisfresh/template/ui/weather/presentation/WeatherViewModel.kt
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package com.cobeisfresh.template.ui.weather.presentation | ||
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import androidx.lifecycle.ViewModel | ||
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class WeatherViewModel : ViewModel() { | ||
} |
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app/src/main/java/com/cobeisfresh/template/ui/weather/view/WeatherActivity.kt
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package com.cobeisfresh.template.ui.weather.view | ||
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import androidx.appcompat.app.AppCompatActivity | ||
import android.os.Bundle | ||
import com.cobeisfresh.template.R | ||
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class WeatherActivity : AppCompatActivity() { | ||
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override fun onCreate(savedInstanceState: Bundle?) { | ||
super.onCreate(savedInstanceState) | ||
setContentView(R.layout.activity_weather) | ||
} | ||
} |
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<vector xmlns:android="http://schemas.android.com/apk/res/android" | ||
xmlns:aapt="http://schemas.android.com/aapt" | ||
android:width="108dp" | ||
android:height="108dp" | ||
android:viewportWidth="108" | ||
android:viewportHeight="108"> | ||
<path | ||
android:fillType="evenOdd" | ||
android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z" | ||
android:strokeWidth="1" | ||
android:strokeColor="#00000000"> | ||
<aapt:attr name="android:fillColor"> | ||
<gradient | ||
android:endX="78.5885" | ||
android:endY="90.9159" | ||
android:startX="48.7653" | ||
android:startY="61.0927" | ||
android:type="linear"> | ||
<item | ||
android:color="#44000000" | ||
android:offset="0.0" /> | ||
<item | ||
android:color="#00000000" | ||
android:offset="1.0" /> | ||
</gradient> | ||
</aapt:attr> | ||
</path> | ||
<path | ||
android:fillColor="#FFFFFF" | ||
android:fillType="nonZero" | ||
android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z" | ||
android:strokeWidth="1" | ||
android:strokeColor="#00000000" /> | ||
</vector> |
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