title: Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
body: <p>Kindly help me, I have searched a lot but couldn't find any solution of this error. </p>
  
  <p><strong>build.gragle:</strong> </p>
  
  <pre><code> apply plugin: 'com.android.application'
  
      android {
          signingConfigs {
              config {
                  keyAlias 'leadtrak'
                  keyPassword 'leadtrak1'
                  storeFile file('/home/sheraz/AndroidStudioProjects/LeadTrak/LeadTrack/docs/LeadTrakKeyStore.jks')
                  storePassword 'leadtrak1'
              }
          }
          compileSdkVersion 24
          buildToolsVersion "24.0.1"
          useLibrary 'org.apache.http.legacy'
          defaultConfig {
              applicationId "leadtrak.activities"
              minSdkVersion 9
              targetSdkVersion 9
          }
          buildTypes {
              release {
                  signingConfig signingConfigs.config
                  minifyEnabled false
                  proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
  
  
              }
          }
          lintOptions {
              checkReleaseBuilds false
              abortOnError false
          }
  
      }
  
  
      dependencies {
  
          compile 'com.android.support:support-v4:24.2.1'
          compile 'com.google.android.gms:play-services:+'
          compile files('libs/acra-4.4.0.jar')
          compile files('libs/commons-codec.jar')
          compile files('libs/ksoap2.jar')
          compile files('libs/sqlcipher.jar')
          compile files('libs/twilioclient-android.jar')
          compile files('libs/zip4j_1.3.1.jar')
      }
  </code></pre>
  
  <p><strong>Error log:</strong></p>
  
  <blockquote>
    <p>Error:warning: Ignoring InnerClasses attribute for an anonymous inner
    class Error:(net.lingala.zip4j.util.ArchiveMaintainer$1) that doesn't
    come with an Error:associated EnclosingMethod attribute. This class
    was probably produced by a Error:compiler that did not target the
    modern .class file format. The recommended Error:solution is to
    recompile the class from source, using an up-to-date compiler
    Error:and without specifying any "-target" type options. The
    consequence of ignoring Error:this warning is that reflective
    operations on this class will incorrectly Error:indicate that it is
    <em>not</em> an inner class. Error:warning: Ignoring InnerClasses attribute for an anonymous inner class Error:(net.lingala.zip4j.unzip.Unzip$1)
    that doesn't come with an Error:associated EnclosingMethod attribute.
    This class was probably produced by a Error:compiler that did not
    target the modern .class file format. The recommended Error:solution
    is to recompile the class from source, using an up-to-date compiler
    Error:and without specifying any "-target" type options. The
    consequence of ignoring Error:this warning is that reflective
    operations on this class will incorrectly Error:indicate that it is
    <em>not</em> an inner class. Error:warning: Ignoring InnerClasses attribute for an anonymous inner class Error:(net.lingala.zip4j.unzip.Unzip$2)
    that doesn't come with an Error:associated EnclosingMethod attribute.
    This class was probably produced by a Error:compiler that did not
    target the modern .class file format. The recommended Error:solution
    is to recompile the class from source, using an up-to-date compiler
    Error:and without specifying any "-target" type options. The
    consequence of ignoring Error:this warning is that reflective
    operations on this class will incorrectly Error:indicate that it is
    <em>not</em> an inner class. Error:warning: Ignoring InnerClasses attribute for an anonymous inner class
    Error:(net.lingala.zip4j.util.ArchiveMaintainer$2) that doesn't come
    with an Error:associated EnclosingMethod attribute. This class was
    probably produced by a Error:compiler that did not target the modern
    .class file format. The recommended Error:solution is to recompile the
    class from source, using an up-to-date compiler Error:and without
    specifying any "-target" type options. The consequence of ignoring
    Error:this warning is that reflective operations on this class will
    incorrectly Error:indicate that it is <em>not</em> an inner class.
    Error:warning: Ignoring InnerClasses attribute for an anonymous inner
    class Error:(net.lingala.zip4j.zip.ZipEngine$1) that doesn't come with
    an Error:associated EnclosingMethod attribute. This class was probably
    produced by a Error:compiler that did not target the modern .class
    file format. The recommended Error:solution is to recompile the class
    from source, using an up-to-date compiler Error:and without specifying
    any "-target" type options. The consequence of ignoring Error:this
    warning is that reflective operations on this class will incorrectly
    Error:indicate that it is <em>not</em> an inner class. Error:The number of
    method references in a .dex file cannot exceed 64K. Learn how to
    resolve this issue at
    <a href="https://developer.android.com/tools/building/multidex.html" rel="noreferrer">https://developer.android.com/tools/building/multidex.html</a>
    Error:Execution failed for task
    ':app:transformClassesWithDexForRelease'.</p>
    
    <blockquote>
      <p>com.android.build.api.transform.TransformException: com.android.ide.common.process.ProcessException:
      java.util.concurrent.ExecutionException:
      com.android.ide.common.process.ProcessException:
      org.gradle.process.internal.ExecException: Process 'command
      '/usr/lib/jvm/java-8-oracle/bin/java'' finished with non-zero exit
      value 2</p>
    </blockquote>
  </blockquote>