[移动开发]Android room Migration didn‘t properly handle

room迁移报错

原来数据库中有一张表，又新建一张表，然后room迁移报错

Android room Migration didn’t properly handle:Expected TableInfo columns={不是空} Found TableInfo columns={空}

一开始这里我没写修改内容会报上面的错

static final Migration MIGRATION_3_4 = new Migration(3, 4) {

        @Override
        public void migrate(@NonNull SupportSQLiteDatabase database) {
        }
};

这里需要写上创建表的SQL语句

注意

主键配置 PRIMARY KEY NOT NULL

INTEGER 字段 需要加上 NOT NULL DEFAULT 0

static final Migration MIGRATION_3_4 = new Migration(3, 4) {

        @Override
        public void migrate(@NonNull SupportSQLiteDatabase database) {
            database.execSQL("CREATE TABLE IF NOT EXISTS record (articleId TEXT PRIMARY KEY NOT NULL，time INTEGER NOT NULL DEFAULT 0)");
        }
};