Most visited

Recently visited

Added in API level 17

CellIdentityGsm

public final class CellIdentityGsm
extends Object implements Parcelable

java.lang.Object
   ↳ android.telephony.CellIdentityGsm


CellIdentity来表示一个独特的GSM小区

Summary

Inherited constants

From interface android.os.Parcelable

Fields

public static final Creator<CellIdentityGsm> CREATOR

实现Parcelable接口

Public methods

int describeContents()

实现Parcelable接口

boolean equals(Object other)

指示其他某个对象是否“等于”这一个。

int getArfcn()
int getBsic()
int getCid()
int getLac()
int getMcc()
int getMnc()
int getPsc()
int hashCode()

返回对象的哈希码值。

String toString()

返回对象的字符串表示形式。

void writeToParcel(Parcel dest, int flags)

实现Parcelable接口

Inherited methods

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

Fields

CREATOR

Added in API level 17
Creator<CellIdentityGsm> CREATOR

实现Parcelable接口

Public methods

describeContents

Added in API level 17
int describeContents ()

实现Parcelable接口

Returns
int a bitmask indicating the set of special object types marshaled by this Parcelable object instance.

equals

Added in API level 17
boolean equals (Object other)

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有区别的可能等价关系; 也就是说,对于任何非空参考值xy ,当且仅当xy引用同一对象( x == y的值为true )时,此方法返回true

请注意,通常需要重写 hashCode方法(每当此方法被覆盖时),以便维护 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
other Object: the reference object with which to compare.
Returns
boolean true if this object is the same as the obj argument; false otherwise.

getArfcn

Added in API level 24
int getArfcn ()

Returns
int 16-bit GSM Absolute RF Channel Number, Integer.MAX_VALUE if unknown

getBsic

Added in API level 24
int getBsic ()

Returns
int 6-bit Base Station Identity Code, Integer.MAX_VALUE if unknown

getCid

Added in API level 17
int getCid ()

Returns
int CID Either 16-bit GSM Cell Identity described in TS 27.007, 0..65535, Integer.MAX_VALUE if unknown

getLac

Added in API level 17
int getLac ()

Returns
int 16-bit Location Area Code, 0..65535, Integer.MAX_VALUE if unknown

getMcc

Added in API level 17
int getMcc ()

Returns
int 3-digit Mobile Country Code, 0..999, Integer.MAX_VALUE if unknown

getMnc

Added in API level 17
int getMnc ()

Returns
int 2 or 3-digit Mobile Network Code, 0..999, Integer.MAX_VALUE if unknown

getPsc

Added in API level 17
int getPsc ()

Returns
int Integer.MAX_VALUE, undefined for GSM

hashCode

Added in API level 17
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.

toString

Added in API level 17
String toString ()

返回对象的字符串表示形式。 一般来说, toString方法返回一个“文本表示”该对象的字符串。 结果应该是一个简洁但内容丰富的表述,对于一个人来说很容易阅读。 建议所有子类重写此方法。

ObjecttoString方法返回一个字符串,其中包含对象为实例的类的名称,符号字符“ @ ”以及对象的哈希代码的无符号十六进制表示形式。 换句话说,这个方法返回一个字符串,其值等于:

 getClass().getName() + '@' + Integer.toHexString(hashCode())
 

Returns
String a string representation of the object.

writeToParcel

Added in API level 17
void writeToParcel (Parcel dest, 
                int flags)

实现Parcelable接口

Parameters
dest Parcel: The Parcel in which the object should be written.
flags int: Additional flags about how the object should be written. May be 0 or PARCELABLE_WRITE_RETURN_VALUE.

Hooray!