最近我在gradle文件中更新了android.arch支持库版本
// ViewModel and LiveData
implementation "android.arch.lifecycle:extensions:1.1.1"
// alternatively, just ViewModel
implementation "android.arch.lifecycle:viewmodel:1.1.1"
// alternatively, just LiveData
implementation "android.arch.lifecycle:livedata:1.1.1"
annotationProcessor "android.arch.lifecycle:compiler:1.1.1"
// Room (use 1.1.0-alpha1 for latest alpha)
implementation "android.arch.persistence.room:runtime:1.0.0"
annotationProcessor "android.arch.persistence.room:compiler:1.0.0"
// Paging
implementation "android.arch.paging:runtime:1.0.0-alpha7"
现在我声明收到此错误
答案 0 :(得分:14)
public static final DiffUtil.ItemCallback<User> DIFF_CALLBACK =
new DiffUtil.ItemCallback<User>() {
@Override
public boolean areItemsTheSame(
@NonNull User oldUser, @NonNull User newUser) {
//..
}
@Override
public boolean areContentsTheSame(
@NonNull User oldUser, @NonNull User newUser) {
//..
}
}
您还可以查看DiffCallback
课程。现在,此课程已移至recyclerview-v7
,已弃用。
答案 1 :(得分:1)
不确定您之前使用的版本,但来自changelog ( 1.0.0-alpha6, February 27, 2018),
重命名了类,并将其移至recyclerview-v7:
- DiffCallback - &gt; DiffUtil.ItemCallback