DB/room

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Error:(12, 17) 警告: Schema export directory is not provided to the annotation processor so we cannot export the schema. You can either provide `room.schemaLocation` annotation processor argument OR set exportSchema to false.
Error:(21, 27) 错误: To use RxJava2 features, you must add `rxjava2` artifact from Room as a dependency. android.arch.persistence.room:rxjava2:<version>

解决方案

  1. 在创建DataBase 是加上{exportSchema = false}
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    @Database(entities = {Wait.class},version = 1, exportSchema = false)
    public abstract class WaitDataBase extends RoomDatabase {
        private static WaitDataBase sInstance;
        public static WaitDataBase getDatabase() {
            if (sInstance == null) {
                sInstance = Room.databaseBuilder(ReadhubApplication.getInstance(), WaitDataBase.class,
                        "Readhub").build();
            }
            return sInstance;
        }
        public static void onDestroy() {
            sInstance = null;
        }
        public  abstract WaitDao  waitDao();
    }