FileNotFoundException on proguard-rules.pro file

Question

I'm using Android Studio v.1.0 My build file :

  buildTypes {

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

    }

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

but when I try to make a release build, I get an error : Error:Execution failed for task ':app:proguardRelease'.

java.io.FileNotFoundException: F:....\app\proguard-rules.pro (File not found)

I think, that proguard-android.txt is a part of Android SDK, am I right ?

And why Android Studio can't find it ?

I also tried proguard-android.pro - the same result

Answer 1

If you don't need any specific ProGuard configuration:

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

(The warning might happened)

Or specify "rules" and put it here:

.../app/proguard-rules.pro

For example I use "Butter Knife" and my proguard-rules.pro looks like:

-keep class butterknife.** { *; }
-dontwarn butterknife.internal.**
-keep class **$$ViewInjector { *; }

-keepclasseswithmembernames class * {
    @butterknife.* <fields>;
}

-keepclasseswithmembernames class * {
    @butterknife.* <methods>;
}

Or, possibly you can leave build.gradle file as it is (if you don't like warnings )), And just put an empty proguard-rules.pro to that location.

Answer 2

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

Following line in build.gradle file of your app module indicates the script of proguard needs to apply to your release build. It has two files:

1. proguard-android.txt: is the default android proguard file, can be found in D:\SDK\tools\proguard directory of SDK.
2. 'proguard-rules.pro': It contains your application specific proguard script. You need to create this file in the root folder of your application. All your application specific proguard should be inside this file.

Answer 3

I've created my own proguard-android.pro file and that works properly for me :

-dontwarn org.apache.commons.**
-dontwarn com.google.**
-dontwarn com.j256.ormlite**
-dontwarn org.apache.http**

-keepattributes SourceFile,LineNumberTable
-keep class com.j256.**
-keepclassmembers class com.j256.** { *; }
-keep enum com.j256.**
-keepclassmembers enum com.j256.** { *; }
-keep interface com.j256.**
-keepclassmembers interface com.j256.** { *; }

-keepattributes Signature
# GSON Library
# For using GSON @Expose annotation
-keepattributes *Annotation*

# Gson specific classes
-keep class sun.misc.Unsafe { *; }
#-keep class com.google.gson.stream.** { *; }

# Application classes that will be serialized/deserialized over Gson
-keep class com.google.gson.examples.android.model.** { *; }

# Google Map
-keep class com.google.android.gms.maps.** { *; }
-keep interface com.google.android.gms.maps.** { *; }

Answer 4

please check your 'proguard-rules.pro' inside your root project folder. I your project exported from eclipse you must create 'proguard-rules.pro' inside root project folder.