在我的情况下，我的自定义proguard.pro是空白。
重建项目适用于我。

When running proguard to build my apk file, I get the following error:

Warning:Exception while processing task java.io.FileNotFoundException: C:\Users\Josh\Documents\AdscendUnityPlugin2.1.3\AdscendUnityPlugin2.1.3\HelloUnity\Export\HelloUnity\build\intermediates\proguard-rules\debug\aapt_rules.txt (The system cannot find the path specified)

My gradle file:

// GENERATED BY UNITY. REMOVE THIS COMMENT TO PREVENT OVERWRITING WHEN EXPORTING AGAIN
buildscript {
    repositories {
        jcenter()
    }

    dependencies {
        classpath 'com.android.tools.build:gradle:2.3.0'
    }
}

allprojects {
   repositories {
       jcenter()
      flatDir {
        dirs 'libs'
      }
   }
}

apply plugin: 'com.android.application'

repositories {

    maven { url "https://bitbucket.org/adscend/androidsdk/raw/master/" }
}


dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.adscendmedia.sdk:adscendmedia:2.1.26'
}

android {
    compileSdkVersion 25
    buildToolsVersion '25.0.0'

    defaultConfig {
        targetSdkVersion 25
    }

    lintOptions {
        abortOnError false
    }

    buildTypes {
        debug {
            jniDebuggable true
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'
        }
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-unity.txt'

        }
    }

}

I couldn't seem to find the folder 'proguard-rules' either, what could be causing this error? Any ideas?

I am aware i'm running proguard on my debug build, i'm just trying to get it to work at this point.

Thank you

In my case my custom proguard.pro is blank. Rebuild project works for me.