问题
I have obfuscated my apk, but the file size has only been reduced from 12MB to 10.5MB.
The reason it is only a relatively small reduction may be because my app uses a couple of large libraries, but is there any way I can check the level of obfuscation that has been performed?
Just in case, this is my proguard-project.txt file...
# To enable ProGuard in your project, edit project.properties
# to define the proguard.config property as described in that file.
#
# 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 ProGuard
# include property in project.properties.
#
# For more details, see
# 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 *;
#}
-dontwarn twitter4j.**
...and the libraries I'm using are android-support-v4.jar, acra-4.5.0.jar and twitter4j-core-4.0.2.jar.
回答1:
In your project directory you will find a Proguard folder, in which you will see four text files:
dump.txt
Describes the internal structure of all the class files in the .apk file
mapping.txt
Lists the mapping between the original and obfuscated class, method, and field names. This file is important when you receive a bug report from a release build, because it translates the obfuscated stack trace back to the original class, method, and member names. See Decoding Obfuscated Stack Traces for more information.
seeds.txt
Lists the classes and members that are not obfuscated
usage.txt
Lists the code that was stripped from the .apk
Source: Proguard
Hope this helps!
回答2:
Here is probably a more visual way to check. In the newer release of Android Studio, it comes with the APK Analyser that let user explore what is in the APK file and it is handy to check if your class has been obfuscated.
Below image shows that both package and method name have been obfuscated
回答3:
any way I can check the level of obfuscation that has been performed?
You might be able to use the flag -optimizationpasses N.
Specifies the number of optimization passes to be performed. By default, a single pass is performed. Multiple passes may result in further improvements. If no improvements are found after an optimization pass, the optimization is ended. Only applicable when optimizing.
回答4:
Proguard workflow:
seeds.txt- list of what Proguard keepsusage.txt- list of what Proguard does not keepmapping.txt- info about old and new naming inold_name -> new_nameformatdump.txt- describe everything that Proguard put into the result archive
来源：https://stackoverflow.com/questions/27714914/android-how-to-check-proguard-obfuscation-has-worked