-optimizationpasses 5
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
打包APK时将会面临一个问题就是防反编译，看看 proguard.cfg 文件，这里是 google默认 不混淆 Activity 、Service ... 类的 子类, 正如上面的截图中看到的 所有 activity 的子类 名称是被保留的。这只是简单的加密，具体如何混淆还在研究中。。。。
想自定义 混淆细节 的话 就 琢磨琢磨这个配置文件吧
-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 com.android.vending.licensing.ILicensingService
-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 * implements android.os.Parcelable {
public static final android.os.Parcelable$Creator *;
}