import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log; public class MyHelper extends SQLiteOpenHelper { private static final String DB_NAME="handcool"; private static final int version = 1; private static...
fun instance(ctx:Context) : AppDatabase{ return instance ?: synchronized(this){ instance ?: buildDataBase(ctx).also { instance = it } } } private fun buildDataBase(ctx:Context) : AppDatabase{ return Room.databaseBuilder(ctx, AppDatabase::class.java, "test_db") .addCallback(object :...
可能原因1 使用了kotlin构建了项目,并且使用kotlin编写room创建数据库,在build.gradle文件里做如下修改 plugins { id 'com.android.library' id 'kotlin-android' id 'kotlin
核心报错信息 :cannot find implementation for xx.xxDatabase. xxDatabase_Impl does not exist 代码语言:javascript 复制 cannot find implementationforkim.hsl.roomdemo.StudentDatabase.StudentDatabase_Impl does not exist 完整报错信息 : 代码语言:javascript 复制 2023-05-1015:22:18.829E/AndroidRuntime:FATAL...
Caused by: java.lang.RuntimeException: cannot find implementation for com.hy.room.HyDatabase. HyDatabase_Impl does not exist 必须要让gradle能集成 apply plugin: 'kotlin-kapt' 然后在项目gradle中引入: implementation 'android.arch.persistence.room:runtime:1.1.1' ...
annotationProcessor "androidx.room:room-compiler:$room_version" // use kapt for Kotlin 在使用以上的依赖,在编译时会报错,如下所示: java.lang.RuntimeException: cannot find implementation for com.xx.xx.db.xxDatabase. xxDatabase_Impl does not exist ...
``` Caused by: java.lang.RuntimeException: cannot find implementation for com.hy.room.HyDatabase. HyDatabase_Impl does not exist ``` 2、新建一个实体类 ``` @Entity(indices = {@Index(value = "firstName", unique = true)}) public class User { @PrimaryKey(autoGenerate = true) publ...
1. cannot find implementation for com.aheading.request.database.AppDatabase. AppDatabase_Impl does not exist 译:无法找到com.aheading.request.database.AppDatabase的实现。AppDatabase_Impl不存在。即数据库创建失败 解决方案: 1.1 检查所有注解是否添加 ...
W/System.err: java.lang.RuntimeException: cannot find implementation for com.app.client.database.RecordDatabase. RecordDatabase_Impl does not exist I am the following definitions: @Database(entities = [Record::class], version = 1) abstract class RecordDatabase: RoomDatabase() { abstract fu...
at android.arch.persistence.room.RoomDatabase.assertNotMainThread(RoomDatabase.java:137) at android.arch.persistence.room.RoomDatabase.query(RoomDatabase.java:165) at com.example.me.MyApp.RoomDb.Dao.AgentDao_Impl.agentsCount(AgentDao_Impl.java:94) at com.example.me.MyApp.View.SignUpActivity....