無法使用proguard生成已簽名的apk

Question

當我嘗試生成已啓用proguard的已簽名apk時，出現以下錯誤。

Error:Uncaught translation error: com.android.dx.cf.code.SimException: com.android.dx.rop.cst.CstMethodRef cannot be cast to com.android.dx.rop.cst.CstInterfaceMethodRef 
Possible causes for this unexpected error include:<ul><li>Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.) 
<a href="syncProject">Re-download dependencies and sync project (requires network)</a></li><li>The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem. 
<a href="stopGradleDaemons">Stop Gradle build processes (requires restart)</a></li><li>Your project may be using a third-party plugin which is not compatible with the other plugins in the project or the version of Gradle requested by the project.</li></ul>In the case of corrupt Gradle processes, you can also try closing the IDE and then killing all Java processes. 

這是我使用了/做什麼：

1. 的Android Studio 2.2中
2. 播放服務版本9.6.1

3. proguard-rules.pro

   • dontwarn okio.
   • dontwarn retrofit2.Platform$Java8
   • keep public class com.google.android.gms.
   • dontwarn com.google.android.gms.
   • keepattributes InnerClasses,EnclosingMethod

4. gradle這個（APP）

   defaultConfig { 
       applicationId "com.something.something" 
       minSdkVersion 15 
       targetSdkVersion 23 
       versionCode 3 
       versionName "3.0" 
   
       // Enabling multidex support. 
       multiDexEnabled true 
   
       testInstrumentationRunner "com.android.test.runner.MultiDexTestRunner" 
   } 
   buildTypes { 
       release { 
        minifyEnabled true 
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
       } 
   } 
   productFlavors { 
   } 
   

5. 庫，我使用的是：

   • com.radiusnetworks:proximitykit-android:0.+@aar
   • com.squareup.retrofit2:retrofit:2.0.2
   • com.google.firebase:firebase-messaging:9.6.1

Answer 1

從這個SO answer基礎，下面的代碼應該工作，只要你不需要任何特殊的ProGuard配置。

buildTypes { 
    release { 
     minifyEnabled true 
     proguardFiles getDefaultProguardFile('proguard-android.txt') 
    } 
} 

如果這樣做，使用原來的proguardFiles條目並創建該文件/Users/franek/Documents/Android_Studio_Melange/app/proguard-rules.txt然後把您的自定義規則，在這個文件中。

這thread也可能有所幫助。將以下行添加到proguard-rules.pro文件中，以解決使用Proguard (Minify Enabled = true)無法生成已簽名APK的問題。

保持類org.apache.http。**
保持類android.net.http。**
dontwarn com.google.android.gms。**