android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views.

mActivity.runOnUiThread(new Runnable() {
              @Override
              public void run() {
                View ivBack = mActivity.findViewById(R.id.ivBack);
                ivBack.setVisibility(View.VISIBLE);
                ivBack.setClickable(true);
                ivBack.setOnClickListener(new View.OnClickListener() {
                  @Override
                  public void onClick(View v) {
                    Log.d(TAG, "onClick: ########################### 아니 클릭은 됩니까아아아ㅏ #");
                  }
                });

              }
            });
          }

UI관련 뭐 하려니까 에러난당  runOnUiThread 이거를 해주면 잘된다. ㅋ