CellSignalStrength
public
abstract
class
CellSignalStrength
extends Object
java.lang.Object | |
↳ | android.telephony.CellSignalStrength |
Abstract base class for cell phone signal strength related information.
Summary
Constants | |
---|---|
int |
SIGNAL_STRENGTH_GOOD
|
int |
SIGNAL_STRENGTH_GREAT
|
int |
SIGNAL_STRENGTH_MODERATE
|
int |
SIGNAL_STRENGTH_NONE_OR_UNKNOWN
|
int |
SIGNAL_STRENGTH_POOR
|
Public methods | |
---|---|
abstract
boolean
|
equals(Object o)
Indicates whether some other object is "equal to" this one. |
abstract
int
|
getAsuLevel()
Get the technology-specific signal strength in Arbitrary Strength Units, calculated from the strength of the pilot signal or equivalent. |
abstract
int
|
getDbm()
Get the technology-specific signal strength in dBm, which is the signal strength of the pilot signal or equivalent. |
abstract
int
|
getLevel()
Retrieve an abstract level value for the overall signal quality. |
abstract
int
|
hashCode()
Returns a hash code value for the object. |
Inherited methods | |
---|---|
Constants
SIGNAL_STRENGTH_GOOD
public static final int SIGNAL_STRENGTH_GOOD
Constant Value: 3 (0x00000003)
SIGNAL_STRENGTH_GREAT
public static final int SIGNAL_STRENGTH_GREAT
Constant Value: 4 (0x00000004)
SIGNAL_STRENGTH_MODERATE
public static final int SIGNAL_STRENGTH_MODERATE
Constant Value: 2 (0x00000002)
SIGNAL_STRENGTH_NONE_OR_UNKNOWN
public static final int SIGNAL_STRENGTH_NONE_OR_UNKNOWN
Constant Value: 0 (0x00000000)
SIGNAL_STRENGTH_POOR
public static final int SIGNAL_STRENGTH_POOR
Constant Value: 1 (0x00000001)
Public methods
equals
public abstract boolean equals (Object o)
Indicates whether some other object is "equal to" this one.
The equals
method implements an equivalence relation
on non-null object references:
- It is reflexive: for any non-null reference value
x
,x.equals(x)
should returntrue
. - It is symmetric: for any non-null reference values
x
andy
,x.equals(y)
should returntrue
if and only ify.equals(x)
returnstrue
. - It is transitive: for any non-null reference values
x
,y
, andz
, ifx.equals(y)
returnstrue
andy.equals(z)
returnstrue
, thenx.equals(z)
should returntrue
. - It is consistent: for any non-null reference values
x
andy
, multiple invocations ofx.equals(y)
consistently returntrue
or consistently returnfalse
, provided no information used inequals
comparisons on the objects is modified. - For any non-null reference value
x
,x.equals(null)
should returnfalse
.
An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.
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. |
getAsuLevel
public abstract int getAsuLevel ()
Get the technology-specific signal strength in Arbitrary Strength Units, calculated from the strength of the pilot signal or equivalent.
Returns | |
---|---|
int |
getDbm
public abstract int getDbm ()
Get the technology-specific signal strength in dBm, which is the signal strength of the pilot signal or equivalent.
Returns | |
---|---|
int |
getLevel
public abstract int getLevel ()
Retrieve an abstract level value for the overall signal quality.
Returns | |
---|---|
int |
a single integer from 0 to 4 representing the general signal quality. 0 represents very poor or unknown signal quality while 4 represents excellent signal quality. Value is between SIGNAL_STRENGTH_NONE_OR_UNKNOWN and SIGNAL_STRENGTH_GREAT inclusive |
hashCode
public abstract int hashCode ()
Returns a hash code value for the object. This method is
supported for the benefit of hash tables such as those provided by
HashMap
.
The general contract of hashCode
is:
- 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 inequals
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
method, then calling thehashCode
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
method, then calling thehashCode
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.
Returns | |
---|---|
int |
a hash code value for this object. |