我想做一个ArrayAdapter显示图像和文字.如果可能,我不想要例子.我希望有人向我解释getView()工作原理.
谢谢.
我需要获得引用:new.OBJECT_VALUE但我现在不怎么做.
我试过这样做.
类型声明:
CREATE TYPE Virus_ObjType AS OBJECT (
name VARCHAR2(50),
description VARCHAR2(700)
);
/
CREATE TYPE Paper_ObjType AS OBJECT (
id NUMBER,
title VARCHAR(100),
magazine VARCHAR2(100),
vol NUMBER,
num NUMBER,
year NUMBER(4)
);
/
CREATE TYPE Virus_NestTabType AS TABLE OF REF Virus_ObjType;
/
CREATE TYPE Paper_NestTabType AS TABLE OF REF Paper_ObjType;
/
ALTER TYPE Virus_ObjType ADD ATTRIBUTE papers Paper_NestTabType CASCADE;
/
ALTER TYPE Paper_ObjType ADD ATTRIBUTE virus Virus_NestTabType CASCADE;
/
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表格声明:
CREATE TABLE Virus_ObjTable OF Virus_ObjType (
PRIMARY KEY(name)) …Run Code Online (Sandbox Code Playgroud)