android - ProGuard 不会混淆 Android 项目？

Question

我尝试在我的 Android 项目中包含 ProGuard，因为我希望我的应用程序在反编译后不那么“可读”，所以我配置了 ProGuard，并且反编译的应用程序（使用 apktool）与 ProGuard 没有区别。

这是我的 proguard.cfg 文件：

-optimizationpasses 5
-dontwarn org.apache.commons.codec.binary.Base64
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-dontpreverify
-verbose
-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 * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.preference.Preference
-keep public class com.android.vending.licensing.ILicensingService

-keepclasseswithmembernames class * {
    native <methods>;
}

-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet);
}

-keepclasseswithmembers class * {
    public <init>(android.content.Context, android.util.AttributeSet, int);
}

-keepclassmembers class * extends android.app.Activity {
   public void *(android.view.View);
}

-keepclassmembers enum * {
    public static **[] values();
    public static ** valueOf(java.lang.String);
}

-keep class * implements android.os.Parcelable {
  public static final android.os.Parcelable$Creator *;
}

另外，我将此行添加到 project.properties：proguard.config=proguard.cfg