java.lang.IllegalStateException: Can not perform this action after onSaveInstanceState
    at android.support.v4.app.FragmentManagerImpl.checkStateLoss(FragmentManager.java:1842)
    at android.support.v4.app.FragmentManagerImpl.enqueueAction(FragmentManager.java:1860)
    at android.support.v4.app.BackStackRecord.commitInternal(BackStackRecord.java:650)
    at android.support.v4.app.BackStackRecord.commit(BackStackRecord.java:609)
    at android.support.v4.app.DialogFragment.dismissInternal(DialogFragment.java:205)
    at android.support.v4.app.DialogFragment.dismiss(DialogFragment.java:171)
    at com.vector.update_app.UpdateDialogFragment$4.onFinish(UpdateDialogFragment.java:312)
    at com.vector.update_app.service.DownloadService$FileDownloadCallBack.onResponse(DownloadService.java:256)
    at com.vector.appupdatedemo.http.UpdateAppHttpUtil$3.onResponse(UpdateAppHttpUtil.java:102)
    at com.vector.appupdatedemo.http.UpdateAppHttpUtil$3.onResponse(UpdateAppHttpUtil.java:89)
    at com.zhy.http.okhttp.OkHttpUtils$5.run(OkHttpUtils.java:256)
    at android.os.Handler.handleCallback(Handler.java:733)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5315)
    at java.lang.reflect.Method.invokeNative(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:515)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:864)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:680)
    at dalvik.system.NativeStart.main(Native Method)

  @Override
                public boolean onFinish(File file) {
                    if (!UpdateDialogFragment.this.isRemoving()) {
                        dismiss();
                    }
                    return true;
                }