Android Studio中的突然编译错误; 错误:找不到符号类ComputableLiveData

Question

我打开了我的项目并编译并运行它,我收到了标题中提到的错误error: cannot find symbol class ComputableLiveData.我使用SQLite上的Room抽象构建了一个本地数据库,并且发生了错误BundleDao_Impl.java.

package com.weaberlumber.programmer.s4s_scan;

import android.arch.lifecycle.ComputableLiveData; //The error is here
import android.arch.lifecycle.LiveData;
import android.arch.persistence.db.SupportSQLiteStatement;
import android.arch.persistence.room.EntityDeletionOrUpdateAdapter;
import android.arch.persistence.room.EntityInsertionAdapter;
import android.arch.persistence.room.InvalidationTracker.Observer;
import android.arch.persistence.room.RoomDatabase;
import android.arch.persistence.room.RoomSQLiteQuery;
import android.arch.persistence.room.util.StringUtil;

我已经尝试删除build文件夹,以便可以重新生成文件,但没有运气.

Answer 1

通过将以下实现添加到build.gradle(Module:app)下的依赖项来解决此问题.

    implementation 'android.arch.lifecycle:livedata:1.1.1'