Java元注解Retention代码示例介绍

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface BindView {
    int value();
}

@Target(ElementType.METHOD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Get {
    String value() default "";
}

@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
public @interface Queue {
    String value() ;
}

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.ANNOTATION_TYPE})
public @interface Target {
    ElementType[] value();
}

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.ANNOTATION_TYPE})
public @interface Retention {
    RetentionPolicy value();
}

public enum RetentionPolicy {
    SOURCE,
    CLASS,
    RUNTIME;
    private RetentionPolicy() {
    }
}

    @BindView(R.id.start_activity)
    TextView startTextView;

    @Get("Http://www.baidu.com")
    Call getPerson(@Queue("name") String name,@Queue("200")int price);
    @Get("http://www.baidu.com")
    Call getPerson();