title: android studio jar import problems
body: <p>I am a freshman in android development and want to use webservice by some jars.(The webservice has been written and publish).
  Then I use Ksoap.jar and Jsoup.jar.
  In android studio. I try to import them. It shows successful but I still cannot use the classes in the jars.</p>
  
  <p>The build.gradle shows below:</p>
  
  <pre><code>dependencies {
      compile fileTree(dir: 'libs', include: ['*.jar'])
      testCompile 'junit:junit:4.12'
      compile 'com.android.support:appcompat-v7:23.0.1'
      compile 'com.android.support:design:23.0.1'
      compile files('libs/ksoap2-android-3.4.0.jar')
      compile files('libs/jsoup-1.8.3-sources.jar')
  }
  </code></pre>
  
  <p>But in my activity, I still cannot import them.
  How can I solve this problem?
  It drives me mad.</p>