added http lib

app/build.gradle

     testCompile 'junit:junit:4.12'
     compile 'com.android.support:appcompat-v7:22.2.1'
     compile 'com.android.support:design:22.2.1'
+    compile 'com.loopj.android:android-async-http:1.4.9'
 }

app/src/main/AndroidManifest.xml

 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.rthoni.camotion">
 
+    <uses-permission android:name="android.permission.INTERNET" />
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"