i  include following jars see below image. 

I want to integrate json web service so i import below jars
apache-mim44j-0.-6.jar
gson-2.1.jar
httpmime-4.0.1.jar
json_simple-1.1.jar
build.gradle file
apply plugin: 'com.android.application'
 android {
compileSdkVersion 23
buildToolsVersion '22.0.1'
 defaultConfig {
    applicationId "pkg.android.myapp"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
 }
  }
   dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
   compile 'com.android.support:appcompat-v7:23.0.1'
  }
when i set above structure my jar file is not getting in my class file any idea how can i solve this problem?your all suggestions are appreciable.
EDIT
apply plugin: 'com.android.application'
 android {
compileSdkVersion 23
buildToolsVersion '22.0.1'
 defaultConfig {
    applicationId "pkg.android.myapp"
    minSdkVersion 15
    targetSdkVersion 23
    versionCode 1
    versionName "1.0"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
 }
  }
 android {
 useLibrary 'org.apache.http.legacy'
 }
   dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
   compile 'com.android.support:appcompat-v7:23.0.1'
  }
 
     
     
     
    