Android kotlin 和 Room Persistences 库未构建

Question

我正在尝试将 Room 与 kotlin 一起使用，但没有任何效果，它会抛出以下内容:

Supported source version 'RELEASE_7' from annotation processor 'android.arch.lifecycle.LifecycleProcessor' less than -source '1.8'

Supported source version 'RELEASE_7' from annotation processor 'android.arch.persistence.room.RoomProcessor' less than - source '1.8'

The following options were not recognized by any processor: '[kapt.kotlin.generated]' 

在我的 Build.Gradle 类中，我有以下内容(乱序但所有重要信息都在这里)

//project build.gradle
ext {
   versions = [
        support: '25.3.1',
        dagger     : '2.11',
        arch_comp  : '1.0.0-alpha1'
    ]
}
//app build.gradle 

apply plugin: 'kotlin-kapt'


compile "android.arch.lifecycle:runtime:$rootProject.versions.arch_comp"
compile "android.arch.lifecycle:extensions:$rootProject.versions.arch_comp"
kapt "android.arch.lifecycle:compiler:$rootProject.versions.arch_comp"

compile "android.arch.persistence.room:runtime:$rootProject.versions.arch_comp"
compile "android.arch.persistence.room:rxjava2:$rootProject.versions.arch_comp"
kapt "android.arch.persistence.room:compiler:$rootProject.versions.arch_comp"

我的模块类

@Entity(tableName = "groups")
data class Group(@ColumnInfo(name = "group_name")
                 var groupName: String = "",
                 @ColumnInfo(name = "users")
                 var users :ArrayList<String> = ArrayList<String>()) {

    @ColumnInfo(name = "id")
    @PrimaryKey(autoGenerate = true)
    var id: Long = 0

}

我的道课

@Dao
interface GroupDao {
   @Query("SELECT * FROM groups")
   fun getAll() : LiveData<ArrayList<Group>>

   @Query("SELECT * FROM groups WHERE group_name = :p0")
   fun getGroupByName(groupName: String) : Group

   //I also did this but with no succsess instade of the above
   @Query("SELECT * FROM groups WHERE group_name = :arg0")
   fun getGroupByName(groupName: String) : Group 
}

我是否遗漏了什么或做错了什么？

Answer 1

有同样的问题，并认为警告是问题所在。

在事件日志中向上滚动一点后，我看到当 Room 检查我的 SQL 是否正常时我的构建失败了。

请检查日志，但我想 Room 很难转换您的

var users :ArrayList<String>