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Added in API level 16

WifiP2pServiceInfo

public class WifiP2pServiceInfo
extends Object implements Parcelable

java.lang.Object
   ↳ android.net.wifi.p2p.nsd.WifiP2pServiceInfo
Known Direct Subclasses


存储通过Wi-Fi对等设置发布的服务信息的类

也可以看看:

Summary

Constants

int SERVICE_TYPE_ALL

所有服务协议类型。

int SERVICE_TYPE_BONJOUR

基于DNS的服务发现协议。

int SERVICE_TYPE_UPNP

UPnP协议。

int SERVICE_TYPE_VENDOR_SPECIFIC

供应商特定协议

Inherited constants

From interface android.os.Parcelable

Public methods

boolean equals(Object o)

指示其他某个对象是否“等于”这一个。

int hashCode()

返回对象的哈希码值。

Inherited methods

From class java.lang.Object
From interface android.os.Parcelable

Constants

SERVICE_TYPE_ALL

Added in API level 16
int SERVICE_TYPE_ALL

所有服务协议类型。

常量值:0(0x00000000)

SERVICE_TYPE_BONJOUR

Added in API level 16
int SERVICE_TYPE_BONJOUR

基于DNS的服务发现协议。

常数值:1(0x00000001)

SERVICE_TYPE_UPNP

Added in API level 16
int SERVICE_TYPE_UPNP

UPnP协议。

常量值:2(0x00000002)

SERVICE_TYPE_VENDOR_SPECIFIC

Added in API level 16
int SERVICE_TYPE_VENDOR_SPECIFIC

供应商特定协议

常量值:255(0x000000ff)

Public methods

equals

Added in API level 16
boolean equals (Object o)

指示其他某个对象是否“等于”这一个。

equals方法在非空对象引用上实现等价关系:

  • It is reflexive: for any non-null reference value x, x.equals(x) should return true.
  • It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
  • It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
  • It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
  • For any non-null reference value x, x.equals(null) should return false.

Objectequals方法实现了对象上最可能的等价关系; 也就是说,对于任何非空参考值xy ,当且仅当xy指向同一对象( x == y的值为true )时,此方法返回true

请注意,无论何时覆盖此方法,通常都需要覆盖 hashCode方法,以维护 hashCode方法的常规协定,该方法声明相等对象必须具有相同的哈希码。

Parameters
o Object: the reference object with which to compare.
Returns
boolean true if this object is the same as the obj argument; false otherwise.

hashCode

Added in API level 16
int hashCode ()

返回对象的哈希码值。 为了散列表的好处而支持此方法,例如由HashMap提供的HashMap

hashCode的总合同是:

  • Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
  • If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
  • It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

尽可能合理实用,类Object定义的hashCode方法确实为不同的对象返回不同的整数。 (这通常通过将对象的内部地址转换为整数来实现,但Java TM编程语言不需要此实现技术。)

Returns
int a hash code value for this object.

Hooray!