Android: simple component architecture steps

Tip: after the article is written, the directory can be generated automatically. Please refer to the help document on the right for how to generate it

preface

Review the steps of Android component development architecture

1, Create

Business component layer

The Module created by the business component layer adopts phone & table, which is the first option to create the Module, because we will debug each Module here

In order to make the hierarchical structure clearer, the hierarchical name is usually placed before the real name of the Module when naming the Module name

Basic component layer

Module s created in the basic component layer are usually created in the Library and placed in the specified hierarchical folder

Functional component layer

The functional component layer relies on the basic component layer and does not need to switch from Module and Application, so it is built with Library

2, Version management

objective

Different Module dependent libraries may have different versions. If unified version management is not carried out, dependency conflicts may be caused by different versions of dependent libraries

The implementation scheme is as follows:

1. In Project build Add the following code under gradle

Contains the following information

isDebug determines whether the component can run independently
android compilation and debugging version information
applicationId contains the package name that can run the Module separately
Information about dependent libraries in the library SDK
Other third parties rely on library information

2. Modify the information of other modules

For example, we are building the main of the business component layer The gradle information is modified as follows

def cfg = rootProject.ext

//plugins {
//    id 'com.android.application'
//}

if (cfg.isDebug) {
    apply plugin: 'com.android.application'
} else {
    apply plugin: 'com.android.library'
}

android {
    compileSdkVersion cfg.android.compileSdkVersion
    buildToolsVersion cfg.android.buildToolsVersion

    defaultConfig {
        if (cfg.isDebug) {
            applicationId cfg.applicationId.login
        }
        minSdkVersion cfg.android.minSdkVersion
        targetSdkVersion cfg.android.targetSdkVersion
        versionCode cfg.android.versionCode
        versionName cfg.android.versionName

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        javaCompileOptions {
            annotationProcessorOptions {
                arguments = [AROUTER_MODULE_NAME: project.getName()]
            }
        }

    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    sourceSets {
        main {
            if (cfg.isDebug) {
                manifest.srcFile 'src/main/debug/AndroidManifest.xml'
            } else {
                manifest.srcFile 'src/main/AndroidManifest.xml'
            }
        }
    }
}

dependencies {

    implementation project(':modulesBase:libBase')

    annotationProcessor cfg.libARouterCompiler

    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

Define the cfg variable and reference the build. In the Project directory Gradle file, and then reference and modify it in the rest of the code

It should be noted that only in the Debug mode can each Module have its own application id, otherwise an error will be reported

3, Rely on LibBase

In the build. Of components requiring LibBase Add the following code to the dependencies in gradle

    implementation project(':modulesBase:libBase')

Modify the build.of LibBase Gradle file, which uses api instead of dependency in dependencies to make it easy to pass up; This prevents repeated dependencies
The specific codes are as follows:

def cfg = rootProject.ext

apply plugin: 'com.android.library'

android {
    compileSdkVersion cfg.android.compileSdkVersion
    buildToolsVersion cfg.android.buildToolsVersion

    defaultConfig {
        minSdkVersion cfg.android.minSdkVersion
        targetSdkVersion cfg.android.targetSdkVersion
        versionCode cfg.android.versionCode
        versionName cfg.android.versionName

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}


dependencies {

    api cfg.library.appcompat
    api cfg.library.material
    api cfg.library.constraintlayout

    api cfg.libARouter

    api project(':modulesBase:libRouter')

    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

4, Modify functional component layer

Modify the build of functional component layer Gradle, but does not pass dependencies, because other modules may rely on both the basic component layer and the functional component layer

def cfg = rootProject.ext

//plugins {
//    id 'com.android.application'
//}

if (cfg.isDebug) {
    apply plugin: 'com.android.application'
} else {
    apply plugin: 'com.android.library'
}

android {
    compileSdkVersion cfg.android.compileSdkVersion
    buildToolsVersion cfg.android.buildToolsVersion

    defaultConfig {
        if (cfg.isDebug) {
            applicationId cfg.applicationId.login
        }
        minSdkVersion cfg.android.minSdkVersion
        targetSdkVersion cfg.android.targetSdkVersion
        versionCode cfg.android.versionCode
        versionName cfg.android.versionName

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        javaCompileOptions {
            annotationProcessorOptions {
                arguments = [AROUTER_MODULE_NAME: project.getName()]
            }
        }

    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    sourceSets {
        main {
            if (cfg.isDebug) {
                manifest.srcFile 'src/main/debug/AndroidManifest.xml'
            } else {
                manifest.srcFile 'src/main/AndroidManifest.xml'
            }
        }
    }
}

dependencies {

    implementation project(':modulesBase:libBase')

    annotationProcessor cfg.libARouterCompiler

    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

5, Modify the main project

plugins {
    id 'com.android.application'
}

def cfg = rootProject.ext

android {
    compileSdkVersion cfg.android.compileSdkVersion
    buildToolsVersion cfg.android.buildToolsVersion

    defaultConfig {
        applicationId cfg.applicationId.app
        minSdkVersion cfg.android.minSdkVersion
        targetSdkVersion cfg.android.targetSdkVersion
        versionCode cfg.android.versionCode
        versionName cfg.android.versionName

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

dependencies {

    implementation project(':modulesBase:libBase')

    if (!cfg.isDebug) {
        implementation project(':modulesCore:main')
        implementation project(':modulesCore:login')
    }

    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'com.google.android.material:material:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.+'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
}

6, Business component layer debug mode switching

In the business component layer, when debugging, you need to have your own Activity startup entry. When running, there can only be one entry for the whole APP, so it corresponds to different androidmanifest XML file
We can create different AndroidManifest files in the business component layer, and then in build Debug switch in gradle (use SourceSet to switch settings)

Androidmanifest. In the debug directory xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.dongnaoedu.module.main">

    <application
        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/Theme.Component_demo">
        <activity android:name=".MainActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

Androidmanifest. Run as library xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.dongnaoedu.module.main">

    <application>
        <activity android:name=".MainActivity" />
    </application>

</manifest>

7, Switch whether the Module can run independently

Modify the isDebug attribute under Project

Keywords: Android Android Studio architecture

Added by EvilCoatHanger on Sun, 20 Feb 2022 07:21:50 +0200

Programming VIP