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

Added in API level 23
public static final int SIGNAL_STRENGTH_GOOD

Constant Value: 3 (0x00000003)

SIGNAL_STRENGTH_GREAT

Added in API level 23
public static final int SIGNAL_STRENGTH_GREAT

Constant Value: 4 (0x00000004)

SIGNAL_STRENGTH_MODERATE

Added in API level 23
public static final int SIGNAL_STRENGTH_MODERATE

Constant Value: 2 (0x00000002)

SIGNAL_STRENGTH_NONE_OR_UNKNOWN

Added in API level 23
public static final int SIGNAL_STRENGTH_NONE_OR_UNKNOWN

Constant Value: 0 (0x00000000)

SIGNAL_STRENGTH_POOR

Added in API level 23
public static final int SIGNAL_STRENGTH_POOR

Constant Value: 1 (0x00000001)

Public methods

equals

Added in API level 17
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 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.

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

Added in API level 17
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

Added in API level 17
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

Added in API level 17
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

Added in API level 17
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 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 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 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.

Returns
int a hash code value for this object.