title: how to solve java.lang.NoClassDefFoundError: okio.Okio?
body: <p>I have an app that work very well but some times when I add some class and code to my program my app crashes. In my logcat error is for this:</p>
  
  <pre><code> 8871-8929/com.example.first E/AndroidRuntime﹕ FATAL EXCEPTION: pool-4-thread-1
  java.lang.NoClassDefFoundError: okio.Okio
      at com.squareup.okhttp.internal.http.HttpConnection.&lt;init&gt;    (HttpConnection.java:90)
      at com.squareup.okhttp.Connection.connectSocket(Connection.java:208)
      at com.squareup.okhttp.Connection.connect(Connection.java:172)
      at com.squareup.okhttp.Connection.connectAndSetOwner(Connection.java:367)
      at com.squareup.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:128)
      at com.squareup.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:328)
      at com.squareup.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:245)
      at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:438)
      at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:389)
      at com.squareup.okhttp.internal.huc.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:233)
  </code></pre>
  
  <p>My gradle:</p>
  
  <pre><code>dependencies {
   compile fileTree(dir: 'libs', include: ['*.jar'])
   compile 'com.android.support:support-v4:23.1.+'
   compile 'com.google.android.gms:play-services:3.2.+'
   compile 'net.hockeyapp.android:HockeySDK:3.6.+'
   compile 'com.googlecode.mp4parser:isoparser:1.0.+'
   compile 'com.android.support:appcompat-v7:23.1.0'
   compile 'com.android.support:design:23.1.1'
   compile 'com.android.support:cardview-v7:23.1.0'
   compile 'com.android.support:recyclerview-v7:23.0.1'
   compile 'com.github.bumptech.glide:glide:+'
   compile 'com.nineoldandroids:library:2.4.+'
    compile 'com.koushikdutta.ion:ion:2.+'
   compile 'de.greenrobot:eventbus:2.4.0'
   compile 'com.github.dmytrodanylyk.circular-progress-button:library:1.1.3'
   compile 'com.theartofdev.edmodo:android-image-cropper:1.0.+'
   compile 'com.squareup.picasso:picasso:2.5.2'
   compile 'com.squareup.okhttp:okhttp-urlconnection:2.7.5'
   compile 'com.github.rahatarmanahmed:circularprogressview:2.4.0'
   compile 'com.makeramen:roundedimageview:2.1.2'
   compile 'com.squareup.okio:okio:1.6.0'
  }
  </code></pre>