我正在尝试消除我的Android应用程序的所有警告，其中之一是:viewModel.valueisaboxedfieldbutneedstobeun-boxedtoexecuteandroid:checked.ThismaycauseNPEsoDataBindingwillsafelyunboxit.YoucanchangetheexpressionandexplicitlywrapviewModel.valuewithsafeUnbox()topreventthewarning其中值是来自父类(superclass)的通用ObservableField:publicabstractc

在我将ASgradle版本升级到2.3.0后，数据绑定(bind)遇到警告:Warning:selectMap[index]isaboxedfieldbutneedstobeun-boxedtoexecuteselectMap[index]?@android:color/white:@android:color/transparent.ThismaycauseNPEsoDataBindingwillsafelyunboxit.YoucanchangetheexpressionandexplicitlywrapselectMap[index]withsafeUnbox()topreven