title: Failed to create MD5 hash for file after
body: <p>I added the org.apache.http.legacy library inside my build.gradle, the new classes are recognised but, when I built it, it shows me this error that i can't understand what is.</p>
  
  <blockquote>
    <p>Error:Execution failed for task ':app:compileDebugJavaWithJavac'.
     Failed to create MD5 hash for file 'C:\Users\Guglielmo\AndroidStudioProjects\LoginForBreakingBadge\app\src\main\java\com\example\guglielmo\loginforbreakingbadge\android-async-http-1.4.9.jar'.</p>
  </blockquote>
  
  <p>Here my build.gradle</p>
  
  <pre><code> apply plugin: 'com.android.application'
  
  android {
  compileSdkVersion 25
  buildToolsVersion "25.0.2"
  useLibrary 'org.apache.http.legacy'
  defaultConfig {
      applicationId "com.example.guglielmo.loginforbreakingbadge"
      minSdkVersion 15
      targetSdkVersion 25
      versionCode 1
      versionName "1.0"
      testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  }
  buildTypes {
      release {
          minifyEnabled false
          proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
      }
   }
   }
  
  dependencies {
  compile fileTree(include: ['*.jar'], dir: 'libs')
  androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
      exclude group: 'com.android.support', module: 'support-annotations'
  })
  compile 'com.android.support:appcompat-v7:25.3.1'
  compile 'com.android.support.constraint:constraint-layout:1.0.2'
  testCompile 'junit:junit:4.12'
  compile files('src/main/java/com/example/guglielmo/loginforbreakingbadge/android-async-http-1.4.9.jar')
  </code></pre>