GnssAutomaticGainControl

public final class GnssAutomaticGainControl
extends Object implements Parcelable

java.lang.Object
   ↳ android.location.GnssAutomaticGainControl


A class that contains GNSS Automatic Gain Control (AGC) information.

AGC acts as a variable gain amplifier adjusting the power of the incoming signal. The AGC level may be used to indicate potential interference. Higher gain (and/or lower input power) shall be output as a positive number. Hence in cases of strong jamming, in the band of this signal, this value will go more negative. This value must be consistent given the same level of the incoming signal power.

Note: Different hardware designs (e.g. antenna, pre-amplification, or other RF HW components) may also affect the typical output of this value on any given hardware design in an open sky test - the important aspect of this output is that changes in this value are indicative of changes on input signal power in the frequency band for this measurement.

Summary

Nested classes

class GnssAutomaticGainControl.Builder

Builder for GnssAutomaticGainControl 

Inherited constants

Fields

public static final Creator<GnssAutomaticGainControl> CREATOR

Public methods

int describeContents()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.

boolean equals(Object obj)

Indicates whether some other object is "equal to" this one.

long getCarrierFrequencyHz()

Gets the carrier frequency of the tracked signal.

int getConstellationType()

Gets the constellation type.

double getLevelDb()

Gets the Automatic Gain Control level in dB.

int hashCode()

Returns a hash code value for the object.

String toString()

Returns a string representation of the object.

void writeToParcel(Parcel parcel, int flag)

Flatten this object in to a Parcel.

Inherited methods

Fields

CREATOR

Added in API level 33
public static final Creator<GnssAutomaticGainControl> CREATOR

Public methods

describeContents

Added in API level 33
public int describeContents ()

Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. For example, if the object will include a file descriptor in the output of writeToParcel(android.os.Parcel, int), the return value of this method must include the CONTENTS_FILE_DESCRIPTOR bit.

Returns
int a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either 0 or CONTENTS_FILE_DESCRIPTOR

equals

Added in API level 33
public boolean equals (Object obj)

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
obj Object: the reference object with which to compare.

Returns
boolean true if this object is the same as the obj argument; false otherwise.

getCarrierFrequencyHz

Added in API level 33
public long getCarrierFrequencyHz ()

Gets the carrier frequency of the tracked signal.

For example it can be the GPS central frequency for L1 = 1575.45 MHz, or L2 = 1227.60 MHz, L5 = 1176.45 MHz, varying GLO channels, etc.

Returns
long the carrier frequency of the signal tracked in Hz. Value is 0 or greater

getConstellationType

Added in API level 33
public int getConstellationType ()

Gets the constellation type.

The return value is one of those constants with CONSTELLATION_ prefix in GnssStatus.

Returns
int Value is GnssStatus.CONSTELLATION_UNKNOWN, GnssStatus.CONSTELLATION_GPS, GnssStatus.CONSTELLATION_SBAS, GnssStatus.CONSTELLATION_GLONASS, GnssStatus.CONSTELLATION_QZSS, GnssStatus.CONSTELLATION_BEIDOU, GnssStatus.CONSTELLATION_GALILEO, or GnssStatus.CONSTELLATION_IRNSS

getLevelDb

Added in API level 33
public double getLevelDb ()

Gets the Automatic Gain Control level in dB.

Returns
double Value is between -10000 and 10000 inclusive

hashCode

Added in API level 33
public 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.

toString

Added in API level 33
public String toString ()

Returns a string representation of the object.

Returns
String This value cannot be null.

writeToParcel

Added in API level 33
public void writeToParcel (Parcel parcel, 
                int flag)

Flatten this object in to a Parcel.

Parameters
parcel Parcel: This value cannot be null.

flag int: Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE. Value is either 0 or a combination of Parcelable.PARCELABLE_WRITE_RETURN_VALUE, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES