android 添加注释,向Android Saripaar添加自定义注释

(披露：我是作者)

Saripaar v2允许您定义自定义注释.

这是你做的事情.

步骤1如下定义您的自定义注释.确保您有一个RUNTIME保留策略,并且您的注释必须针对FIELD元素类型.消息和messageResId属性是必需的,因此请注意名称和类型.

@ValidateUsing(HaggleRule.class)

@Retention(RetentionPolicy.RUNTIME)

@Target(ElementType.FIELD)

public @interface Haggle {

public int messageResId() default -1; // Mandatory attribute

public String message() default "Oops... too pricey"; // Mandatory attribute

public int sequence() default -1; // Mandatory attribute

public double maximumAskingPrice(); // Your attributes

}

步骤2通过扩展AnnotationRule类定义您的规则.

public class HaggleRule extends AnnotationRule {

protected HaggleRule(Haggle haggle) {

super(haggle);

}

@Override

public boolean isValid(Double data) {

boolean isValid = false;

double maximumAskingPrice = mRuleAnnotation.maximumAskingPrice();

// Do some clever validation....

return isValid;

}

}

步骤3注册您的规则.

Validator.registerAnnotation(Haggle.class); // Your annotation class instance

就那么简单.看看源代码,如果你想的话. Saripaar v2现已在Maven Central上市.