Missing contentDescription attribute on image
대강 이미지의 contentDescription 특성이 없으니까 추가해달라는 얘기다.
참조: https://support.google.com/accessibility/android/answer/7158690?hl=en
When using an ImageView, ImageButton, CheckBox, or other View that conveys information graphically, use an [android:contentDescription](<https://developer.android.com/reference/android/view/View.html#attr_android:contentDescription>) attribute to provide a content label for that View.
A content label sometimes depends on information only available at runtime, or the meaning of a View might change over time. For example, a Play button might change to a Pause button during music playback. In these cases, use [View#setContentDescription(CharSequence contentDescription)](<https://developer.android.com/reference/android/view/View.html#setContentDescription(java.lang.CharSequence)>) to update the content label at the appropriate time.
ImageView를 사용할 때 contentDescription을 설정하지 않으면 위와 같이 뜬다. 알트 쉬프트 엔터를 눌러서 추가해주자.
그러면 자동으로 TODO가 추가가 되면서 경고가 하나 더 튀어나온다. 이는 하드코딩 이슈이므로 strings.xml에 문자열을 추가해주면 된다.Missing contentDescription attribute on image