Android Studio & ProGuard: cannot resolve symbol getDefaultProguardFile?

问题

IDE: Android Studio 1.1.0

Subject: ProGuard

Problem: ProGuard files or tools not recognized by Android Studio, getDefaultProguardFile can not be resolved and there's no proguard-android.txt and proguard-rules.txt files in the app, see the image below: (from build.gradle)

How to fix this and achieve ProGuard protection to my App ?

回答1:

Try to change into -

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

回答2:

I had the same trouble as shown here:

The error message makes it seem as if the file is not being found, and therefore not read. However, I went to into sdk/tools/proguard folder to find the file, and at the top added a statement to test if the file was actually being read. I put at the top "Will this crash it?"

As you can see from the error, the file was indeed found during the build process and the statement I added crashed it. Thus, it appears the "can't resolve symbol" error is giving a false positive.

回答3:

I really had the same issue. So here is what made my project working:

release {
    minifyEnabled true
    proguardFile 'proguard-rules.pro'
}

Tested by this code:

 Log.d(TAG, "TEST!");
 Log.i(TAG, "INFO!");
 Log.e(TAG, "ERROR!");

In proguard.pro I placed this snippet (which removes all Log.d-Statements in the byte-code)

-assumenosideeffects class android.util.Log {
    public static int d(...);
}

And the cat says:

MainAct﹕ INFO!
MainAct﹕ ERROR!

-> exactly what I tried to achieve :)

PS: This assumes that you have the proguard.pro file in the module (aka 'app') folder.

回答4:

Try:

proguardFiles.add(file('proguard-android.txt')) proguardFiles.add(file('proguard-rules.txt'))

This structure works in the gradle-experimental plugin.

回答5:

I fixed the issue of Android Studio not recognising the method by using double quotes instead of the single. The below is what I ended up using:

    release{
        shrinkResources true
        minifyEnabled true
        proguardFiles getDefaultProguardFile("proguard-android.txt"),
                "proguard-rules.pro"
    }

回答6:

try this,

{
  minifyEnabled false
  // proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' 
  proguardFiles 'proguard-rules.pro'
}

回答7:

In my case:

buildTypes {
    release {
        runProguard false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}

replace runProguard false with minifyEnabled false works.

来源：https://stackoverflow.com/questions/29527524/android-studio-proguard-cannot-resolve-symbol-getdefaultproguardfile