Android组件化开发详解

学习目标:

熟练使用组件化开发,路由配置


学习内容:

在使用组件化开发前首先要明确项目整体框架,划分模块及业务(重点),好的开始才会有好的结果。模块划分明确后开始配置Module。

如图我们要完成以下功能:

1.点击商城进入ShoppingModule

2.点击登录进入LoginModule

3.点击账单红色区域展示账单列表(其他Module中的Fragment)

(shareModule为公共模块)

 根据业务需求创建如下:

在App的gradle.properties文件下添加,用于控制module是否独立运行。

#配置某个组件是否可以独立运行
isShoppingRunAlone = true
isLoginRunALone = true

然后配置App build.gradle。

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 30
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "com.example.moduledemo"
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

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

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.3.0'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

    //导入公共模块
    implementation project(':ShareModule')

    // 根据gradle中的配置来决定是否引用module
    if (!isLoginRunALone.toBoolean()){
        implementation project(':LoginModule')
    }
    if (!isShoppingRunAlone.toBoolean()){
        implementation project(':ShoppingModule')
    }

}

继续配置其他Module的build.gradle文件。

if (isShoppingRunAlone.toBoolean()){
    apply plugin: 'com.android.application'
}else {
    apply plugin: 'com.android.library'
}
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'

android {
    compileSdkVersion 30
    buildToolsVersion "29.0.3"

    defaultConfig {
        minSdkVersion 16
        targetSdkVersion 30
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        consumerProguardFiles "consumer-rules.pro"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets{
        main{
            // 在独立运行或者作为Libarary调试时,使用不同的AndroidManifest.xml文件
            if (isShoppingRunAlone.toBoolean()){
                manifest.srcFile 'src/main/manifest/AndroidManifest.xml'
            }else {
                manifest.srcFile 'src/main/AndroidManifest.xml'
            }
        }
    }
}

dependencies {
    implementation fileTree(dir: "libs", include: ["*.jar"])
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
    implementation 'androidx.core:core-ktx:1.3.0'
    implementation 'androidx.appcompat:appcompat:1.1.0'
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'androidx.test.ext:junit:1.1.1'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
    //导入公共模块
    implementation project(':ShareModule')

}

在不同运行模式下使用不同的Manifest文件。

需要在对应module的Main目录下新建manifest文件夹(不然单独运行会找不到Manifest文件)。

单独运行的manifest文件设置如下:

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

    <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/AppTheme">
        <activity android:name=".LoginActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

并入主Module运行时manifest文件设置如下:

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.shoppingmodule">

    <application>
        <activity android:name=".ShoppingActivity"/>
    </application>
</manifest>

 

全部配置完成之后,可以在gradle.properties中修改变量的值,编译查看配置是否正确,manifest文件是否替换。运行查看是否正常。

接下来开始配置路由。

好多人心中有疑惑,在引用Module之后是可以直接获取到子Module的Activity的为什么还要使用路由跳转。是因为组件化开发是为了使单独Module可以独自编译,运行如果主Module引用子Module的类名,当子Module单独运行时主Module会编译异常。

我们要知道一个项目不可能只有一个子Module,当我们其他子Module要进行相互跳转时如何使用路由呢?所以我们要在ShareModule进行路由的配置,在之前的配置中我们将ShareModule导入了每个Module。

第一步

我们创建对应Module的跳转模板

import android.content.Context;
import android.os.Bundle;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

public interface ILoginService {
    void launch(Context ctx, String targetClass);

}
import android.content.Context;
import android.os.Bundle;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

public interface IShoppingService {
    void launch(Context ctx, String string);
    Fragment newBillFragment(FragmentManager fragmentManager, int viewId, Bundle bundle);
}

 第二步

在对应的moudle中实现跳转逻辑及传值操作

package com.example.loginmodule;

import android.content.Context;
import android.content.Intent;

import com.example.sharemodule.ILoginService;


public class LoginService implements ILoginService {
    @Override
    public void launch(Context ctx, String targetClass) {
        Intent intent = new Intent(ctx, LoginActivity.class);
        ctx.startActivity(intent);
    }
}
package com.example.shoppingmodule;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

import com.example.sharemodule.IShoppingService;


public class ShoppingService implements IShoppingService {

    @Override
    public void launch(Context ctx, String string) {
        Intent intent = new Intent(ctx, ShoppingActivity.class);
        ctx.startActivity(intent);
    }

    @Override
    public Fragment newBillFragment(FragmentManager fragmentManager, int viewId, Bundle bundle) {
        BillFragment fragment = new BillFragment();
        fragment.setArguments(bundle);
        fragmentManager.beginTransaction().replace(viewId, fragment).commit();
        return fragment;
    }
}

 第三步

接下来我们创建一个ServiceFactory,为我们提供跳转实例,并且处理单独运行时可能会出现的异常

package com.example.sharemodule;

public class ServiceFactory {
    private static final ServiceFactory instance = new ServiceFactory();

    private ILoginService mLoginService;
    private IShoppingService mShoppingService;

    private ServiceFactory(){}

    public static ServiceFactory getInstance() {
        return instance;
    }

    public ILoginService getLoginService() {
        if (mLoginService == null){
            mLoginService = new EmptyLoginService();
        }
        return mLoginService;
    }

    public void setLoginService(ILoginService mLoginService) {
        this.mLoginService = mLoginService;
    }

    public IShoppingService getSignService() {
        if (mShoppingService == null){
            mShoppingService = new EmptyShoppingService();
        }
        return mShoppingService;
    }

    public void setSignService(IShoppingService mSignService) {
        this.mShoppingService = mSignService;
    }
}
package com.example.mylibrarySharedLibrary;

import android.content.Context;
import android.os.Bundle;

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

public class EmptyLoginService implements ILoginService {
    @Override
    public void launch(Context ctx, String targetClass) {

    }

    @Override
    public Fragment newUserInfoFragment(FragmentManager fragmentManager, int viewId, Bundle bundle) {
        return null;
    }
}
package com.example.mylibrarySharedLibrary;

import android.content.Context;

public class EmptySignService implements ISignService  {
    @Override
    public void launch(Context ctx, String userId) {

    }
}

这样处理即使我们单独运行主Moudle时也不会发生异常。

以上我们跳转的代码就写完了接下来就是对serviceFactory中

private ILoginService mLoginService;
private IShoppingService mSignService;

进行赋值

package com.example.sharemodule;

import android.app.Application;

public interface IComponentApplication {
    void initialize(Application application);
}

提供统一初始化的接口

package com.example.moduledemo;

import android.app.Application;
import android.util.Log;

import com.example.sharemodule.AppConfig;
import com.example.sharemodule.IComponentApplication;


public class MainApplication extends Application implements IComponentApplication {
    private static Application application;

    public static Application getApplication(){
        return application;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        initialize(this);
    }

    @Override
    public void initialize(Application application) {
        for (String cpnt : AppConfig.Components){
            try{
                Class<?> clz = Class.forName(cpnt);
                Object obj = clz.newInstance();
                if (obj instanceof IComponentApplication){
                    ((IComponentApplication) obj).initialize(this);
                }
            }catch (Exception e){
                Log.e("TAG", e.getMessage());
            }
        }
    }
}
package com.example.loginmodule;

import android.app.Application;

import com.example.sharemodule.IComponentApplication;
import com.example.sharemodule.ServiceFactory;


public class LoginApplication extends Application implements IComponentApplication {

    private static Application application;

    public static Application getApplication(){
        return application;
    }

    @Override
    public void onCreate() {
        super.onCreate();
    }

    @Override
    public void initialize(Application app) {
        application = app;
        ServiceFactory.getInstance().setLoginService(new LoginService());
    }
}
package com.example.shoppingmodule;

import android.app.Application;

import com.example.sharemodule.IComponentApplication;
import com.example.sharemodule.ServiceFactory;


public class ShoppingApplication extends Application implements IComponentApplication {
    private static Application application;

    public static Application getApplication() {
        return application;
    }

    @Override
    public void onCreate() {
        super.onCreate();

    }

    @Override
    public void initialize(Application app) {
        application = app;
        ServiceFactory.getInstance().setSignService(new SignService());
    }
}

 

package com.example.sharemodule;

public class AppConfig {
    public static final String[] Components = {
            "com.example.shoppingmodule.ShoppingApplication",
            "com.example.loginmodule.LoginApplication"
    };
}

 进入App时进行初始化,通过反射获取子Module的Application实例进行初始化。

最终结果:

 

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转载自blog.csdn.net/qq_41221017/article/details/112424005