okhttp-3.0.1.jar を使用するとクラッシュします。
02-25 17:44:33.279: E/AndroidRuntime(30263): FATAL EXCEPTION: main
02-25 17:44:33.279: E/AndroidRuntime(30263): Process:com.littleapproom.diamondapp, PID: 30263
02-25 17:44:33.279: E/AndroidRuntime(30263):java.lang.NoClassDefFoundError: Failed resolution Lokhttp3/MediaType;
02-25 17:44:33.279: E/AndroidRuntime(30263): at com.littleapproom.diamondapp.helper.ServiceTask.<clinit>(ServiceTask.java:68)
02-25 17:44:33.279: E/AndroidRuntime(30263): at com.littleapproom.diamondapp.RegisterActivity.callRegisterApi(RegisterActivity.java:74)
02-25 17:44:33.279: E/AndroidRuntime(30263): at com.littleapproom.diamondapp.RegisterActivity.onClick(RegisterActivity.java:50)
02-25 17:44:33.279: E/AndroidRuntime(30263): at android.view.View.performClick(View.java:4785)
02-25 17:44:33.279: E/AndroidRuntime(30263): at android.view.View$PerformClick.run(View.java:19884)
02-25 17:44:33.279: E/AndroidRuntime(30263): at android.os.Handler.handleCallback(Handler.java:739)
02-25 17:44:33.279: E/AndroidRuntime(30263): at android.os.Handler.dispatchMessage(Handler.java:95)
02-25 17:44:33.279: E/AndroidRuntime(30263): at android.os.Looper.loop(Looper.java:135)
02-25 17:44:33.279: E/AndroidRuntime(30263): at android.app.ActivityThread.main(ActivityThread.java:5343)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.reflect.Method.invoke(Native Method)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.reflect.Method.invoke(Method.java:372)
02-25 17:44:33.279: E/AndroidRuntime(30263): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
02-25 17:44:33.279: E/AndroidRuntime(30263): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
02-25 17:44:33.279: E/AndroidRuntime(30263): Caused by: java.lang.ClassNotFoundException: Didn't find class "okhttp3.MediaType" on path: DexPathList[[zip file "/data/app/com.littleapproom.diamondapp-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
02-25 17:44:33.279: E/AndroidRuntime(30263): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
02-25 17:44:33.279: E/AndroidRuntime(30263): ... 13 more
02-25 17:44:33.279: E/AndroidRuntime(30263): Suppressed: java.lang.ClassNotFoundException: okhttp3.MediaType
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.Class.classForName(Native Method)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
02-25 17:44:33.279: E/AndroidRuntime(30263): at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
02-25 17:44:33.279: E/AndroidRuntime(30263): ... 14 more
02-25 17:44:33.279: E/AndroidRuntime(30263): Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available
okhttp-3.0.1.jarは正常に 動作し、欠落しているクラスがあります。解決のために助けてください。