Mobile Platform as a Service：混淆 Android 檔案

ProGuard 是一個壓縮、最佳化和混淆 Java 位元組碼檔案的工具。

• 壓縮 指檢測以及刪除沒有用到的類、欄位、方法以及屬性。

• 最佳化 指分析以及最佳化方法的位元組碼。

• 混淆 指使用無意義的短變數，對類、變數、方法進行重新命名。

使用 ProGuard 可以讓代碼更精簡，更高效，也更難被逆向或破解。

前置條件

您已經配置 mPaaS 工程。

關於此任務

採用組件化方案的 mPaaS 工程，每一個 bundle 的編譯產物都是一個已經混淆的 dex 檔案，所以配置混淆檔案是以 bundle 工程為單位而進行的。Portal 工程通常沒有代碼，不需要開啟混淆。

程式碼範例

• Gradle 配置

  android {
    compileSdkVersion 23
    buildToolsVersion "19.1.0"
  
    defaultConfig {
        applicationId "com.youedata.xionganmaster.launcher"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            // 混淆開關，是否混淆
            minifyEnabled true
            // 混淆檔案清單，混淆規則配置
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    lintOptions {
          checkReleaseBuilds false
          // Or, if you prefer, you can continue to check for errors in release builds,
          // but continue the build even when errors are found:
          abortOnError false
    }
  }

• 混淆檔案樣本

  下列混淆是一個基本樣本（如果要添加額外的第三方庫，需要加入其它混淆，通常設定檔可在第三方庫的官網中找到）：

    # Add project specific ProGuard rules here.
    # By default, the flags in this file are appended to flags specified
    # in ${sdk.dir}/tools/proguard/proguard-android.txt
    # You can edit the include path and order by changing the proguardFiles
    # directive in build.gradle.
  
    # For more details, see [Shrink your code and resources](http://developer.android.com/guide/developing/tools/proguard.html)。
  
    # Add any project specific keep options here:
  
    # 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 *;
    # }
    -optimizationpasses 5
    -dontusemixedcaseclassnames
    -dontskipnonpubliclibraryclasses
    -dontpreverify
    -verbose
    -ignorewarnings
    -optimizations !code/simplification/arithmetic,!field/*,!class/merging/*
  
    -keep public class * extends android.app.Activity
    -keep public class * extends android.app.Application
    -keep public class * extends android.app.Service
    -keep public class * extends android.content.BroadcastReceiver
    -keep public class * extends android.content.ContentProvider
    -keep public class com.android.vending.licensing.ILicensingService
    -keep public class com.alipay.mobile.phonecashier.*
    -keepnames public class *
    -keepattributes SourceFile,LineNumberTable
    -keepattributes *Annotation*
  
    #-keep public class * extends com.alipay.mobile.framework.LauncherApplicationAgent {
    #    *;
    #}
  
    #-keep public class * extends com.alipay.mobile.framework.LauncherActivityAgent {
    #    *;
    #}
  
    -keepclasseswithmembernames class * {
        native <methods>;
    }
  
    -keepclasseswithmembernames class * {
        public <init>(android.content.Context, android.util.AttributeSet);
    }
  
    -keepclasseswithmembernames class * {
        public <init>(android.content.Context, android.util.AttributeSet, int);
    }
  
    -keepclassmembers enum * {
        public static **[] values();
        public static ** valueOf(java.lang.String);
    }
  
    -keep class * extends java.lang.annotation.Annotation { *; }
    -keep interface * extends java.lang.annotation.Annotation { *; }
  
    -keep class * implements android.os.Parcelable {
      public static final android.os.Parcelable$Creator *;
    }
  
    -keep public class * extends android.view.View{
        !private <fields>;
        !private <methods>;
    }
  
    -keep class android.util.**{
         public <fields>;
         public <methods>;
     }
  
    -keep public class  com.squareup.javapoet.**{
        !private <fields>;
          !private <methods>;
    }
    -keep public class   javax.annotation.**{
            !private <fields>;
            !private <methods>;
      }
    -keep public class   javax.inject.**{
         !private <fields>;
         !private <methods>;
     }
    -keep interface **{
      !private <fields>;
      !private <methods>;
    }
    # for dagger
      -keep class * extends dagger.internal.Binding
      -keep class * extends dagger.internal.ModuleAdapter
  
      -keep class **$$ModuleAdapter
      -keep class **$$InjectAdapter
      -keep class **$$StaticInjection
  
      -keep class dagger.** { *; }
  
      -keep class javax.inject.**{ *; }
      -keep class * extends dagger.internal.Binding
      -keep class * extends dagger.internal.ModuleAdapter
      -keep class * extends dagger.internal.StaticInjection
  
    # for butterknife
      -keep class butterknife.* { *; }
      -keep class butterknife.** { *; }
      -dontwarn butterknife.internal.**
      -keep class **$$ViewBinder { *; }
  
      -keepclasseswithmembernames class * {
          @butterknife.* <fields>;
      }
  
      -keepclasseswithmembernames class * {
          @butterknife.* <methods>;
      }

  說明

  如果在您的 bundle 工程中定義了架構類LauncherApplicationAgent 和 LauncherActivityAgent，請注意進行防混淆設定

• 避免混淆萬用群組件

  如果在metainfo.xml中註冊了萬用群組件，編譯時間會檢查這些組件是否存在，請避免這些組件被混淆，否則會編譯失敗。例如註冊了以下組件：

     <metainfo>
     <service>
         <className>com.mpaas.cq.bundleb.MyServiceImpl</className>
         <interfaceName>com.mpaas.cq.bundleb.api.MyService</interfaceName>
         <isLazy>true</isLazy>
     </service>
  </metainfo>

  請在混淆配置中添加：

    -keep class com.mpaas.cq.bundleb.MyServiceImpl
    -keep class com.mpaas.cq.bundleb.api.MyService