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Summary: Nested Classes | Constants | Inherited Constants | Fields | Methods | Inherited Methods

# GnssNavigationMessage

`public final class GnssNavigationMessage`
`extends Object` `implements Parcelable`

java.lang.Object
↳ | android.location.GnssNavigationMessage

A class containing a GNSS satellite Navigation Message.

## Summary

### Nested classes
`class` | `GnssNavigationMessage.Callback` Used for receiving GNSS satellite Navigation Messages from the GNSS engine.

### Constants
`int` | `STATUS_PARITY_PASSED` The Navigation Message was received without any parity error in its navigation words.
`int` | `STATUS_PARITY_REBUILT` The Navigation Message was received with words that failed parity check, but the receiver was able to correct those words.
`int` | `STATUS_UNKNOWN` The Navigation Message Status is 'unknown'.
`int` | `TYPE_BDS_CNAV1` Beidou CNAV1 message contained in the structure.
`int` | `TYPE_BDS_CNAV2` Beidou CNAV2 message contained in the structure.
`int` | `TYPE_BDS_D1` Beidou D1 message contained in the structure.
`int` | `TYPE_BDS_D2` Beidou D2 message contained in the structure.
`int` | `TYPE_GAL_F` Galileo F/NAV message contained in the structure.
`int` | `TYPE_GAL_I` Galileo I/NAV message contained in the structure.
`int` | `TYPE_GLO_L1CA` Glonass L1 CA message contained in the structure.
`int` | `TYPE_GPS_CNAV2` GPS CNAV-2 message contained in the structure.
`int` | `TYPE_GPS_L1CA` GPS L1 C/A message contained in the structure.
`int` | `TYPE_GPS_L2CNAV` GPS L2-CNAV message contained in the structure.
`int` | `TYPE_GPS_L5CNAV` GPS L5-CNAV message contained in the structure.
`int` | `TYPE_IRN_L5CA` IRNSS L5 C/A message contained in the structure.
`int` | `TYPE_QZS_L1CA` QZSS L1 C/A message contained in the structure.
`int` | `TYPE_SBS` SBAS message contained in the structure.
`int` | `TYPE_UNKNOWN` Message type unknown

### Inherited constants
From interface `android.os.Parcelable`
`int` | `CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor.
`int` | `PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `writeToParcel(Parcel, int)`: the object being written is a return value, that is the result of a function such as "`Parcelable someFunction()`", "`void someFunction(out Parcelable)`", or "`void someFunction(inout Parcelable)`".

### Fields
`public static final Creator<GnssNavigationMessage>` | `CREATOR`

### Public methods
`int` | `describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`byte[]` | `getData()` Gets the data of the reported GPS message.
`int` | `getMessageId()` Gets the Message identifier.
`int` | `getStatus()` Gets the Status of the navigation message contained in the object.
`int` | `getSubmessageId()` Gets the sub-message identifier, relevant to the `getType()` of the message.
`int` | `getSvid()` Gets the satellite ID.
`int` | `getType()` Gets the type of the navigation message contained in the object.
`String` | `toString()` Returns a string representation of the object.
`void` | `writeToParcel(Parcel parcel, int flags)` Flatten this object in to a Parcel.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.
From interface `android.os.Parcelable`
`abstract int` | `describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`abstract void` | `writeToParcel(Parcel dest, int flags)` Flatten this object in to a Parcel.

## Constants

### STATUS_PARITY_PASSED

    public static final int STATUS_PARITY_PASSED

The Navigation Message was received without any parity error in its navigation words.

Constant Value: 1 (0x00000001)

### STATUS_PARITY_REBUILT

    public static final int STATUS_PARITY_REBUILT

The Navigation Message was received with words that failed parity check, but the receiver was able to correct those words.

Constant Value: 2 (0x00000002)

### STATUS_UNKNOWN

    public static final int STATUS_UNKNOWN

The Navigation Message Status is 'unknown'.

Constant Value: 0 (0x00000000)

### TYPE_BDS_CNAV1

    public static final int TYPE_BDS_CNAV1

Beidou CNAV1 message contained in the structure.

Constant Value: 1283 (0x00000503)

### TYPE_BDS_CNAV2

    public static final int TYPE_BDS_CNAV2

Beidou CNAV2 message contained in the structure.

Constant Value: 1284 (0x00000504)

### TYPE_BDS_D1

    public static final int TYPE_BDS_D1

Beidou D1 message contained in the structure.

Constant Value: 1281 (0x00000501)

### TYPE_BDS_D2

    public static final int TYPE_BDS_D2

Beidou D2 message contained in the structure.

Constant Value: 1282 (0x00000502)

### TYPE_GAL_F

    public static final int TYPE_GAL_F

Galileo F/NAV message contained in the structure.

Constant Value: 1538 (0x00000602)

### TYPE_GAL_I

    public static final int TYPE_GAL_I

Galileo I/NAV message contained in the structure.

Constant Value: 1537 (0x00000601)

### TYPE_GLO_L1CA

    public static final int TYPE_GLO_L1CA

Glonass L1 CA message contained in the structure.

Constant Value: 769 (0x00000301)

### TYPE_GPS_CNAV2

    public static final int TYPE_GPS_CNAV2

GPS CNAV-2 message contained in the structure.

Constant Value: 260 (0x00000104)

### TYPE_GPS_L1CA

    public static final int TYPE_GPS_L1CA

GPS L1 C/A message contained in the structure.

Constant Value: 257 (0x00000101)

### TYPE_GPS_L2CNAV

    public static final int TYPE_GPS_L2CNAV

GPS L2-CNAV message contained in the structure.

Constant Value: 258 (0x00000102)

### TYPE_GPS_L5CNAV

    public static final int TYPE_GPS_L5CNAV

GPS L5-CNAV message contained in the structure.

Constant Value: 259 (0x00000103)

### TYPE_IRN_L5CA

    public static final int TYPE_IRN_L5CA

IRNSS L5 C/A message contained in the structure.

Constant Value: 1793 (0x00000701)

### TYPE_QZS_L1CA

    public static final int TYPE_QZS_L1CA

QZSS L1 C/A message contained in the structure.

Constant Value: 1025 (0x00000401)

### TYPE_SBS

    public static final int TYPE_SBS

SBAS message contained in the structure.

Constant Value: 513 (0x00000201)

### TYPE_UNKNOWN

    public static final int TYPE_UNKNOWN

Message type unknown

Constant Value: 0 (0x00000000)

## Fields

### CREATOR

    public static final Creator<GnssNavigationMessage> CREATOR

## Public methods

### describeContents

    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`

### getData

    public byte[] getData ()

Gets the data of the reported GPS message.

The bytes (or words) specified using big endian format (MSB first).

- For GPS L1 C/A, IRNSS L5 C/A, Beidou D1 & Beidou D2, each subframe contains 10 30-bit words. Each word (30 bits) should be fit into the last 30 bits in a 4-byte word (skip B31 and B32), with MSB first, for a total of 40 bytes, covering a time period of 6, 6, and 0.6 seconds, respectively.
- For Glonass L1 C/A, each string contains 85 data bits, including the checksum. These bits should be fit into 11 bytes, with MSB first (skip B86-B88), covering a time period of 2 seconds.
- For Galileo F/NAV, each word consists of 238-bit (sync & tail symbols excluded). Each word should be fit into 30-bytes, with MSB first (skip B239, B240), covering a time period of 10 seconds.
- For Galileo I/NAV, each page contains 2 page parts, even and odd, with a total of 2x114 = 228 bits, (sync & tail excluded) that should be fit into 29 bytes, with MSB first (skip B229-B232).
- For SBAS, each block consists of 250 data bits, that should be fit into 32 bytes. MSB first (skip B251-B256).
- For Beidou CNAV1, subframe #1 consists of 14 data bits, that should be fit into 2 bytes. MSB first (skip B15-B16). subframe #2 consists of 600 bits that should be fit into 75 bytes. subframe #3 consists of 264 data bits that should be fit into 33 bytes.
- For Beidou CNAV2, each subframe consists of 288 data bits, that should be fit into 36 bytes.

Returns
`byte[]` | This value cannot be `null`.

### getMessageId

    public int getMessageId ()

Gets the Message identifier.

This provides an index to help with complete Navigation Message assembly. Similar identifiers within the data bits themselves often supplement this information, in ways even more specific to each message type; see the relevant satellite constellation ICDs for details.

- For GPS L1 C/A subframe 4 and 5, this value corresponds to the 'frame id' of the navigation message, in the range of 1-25 (Subframe 1, 2, 3 does not contain a 'frame id' and this value can be set to -1.)
- For Glonass L1 C/A, this refers to the frame ID, in the range of 1-5.
- For BeiDou D1, this refers to the frame number in the range of 1-24
- For Beidou D2, this refers to the frame number, in the range of 1-120
- For Galileo F/NAV nominal frame structure, this refers to the subframe number, in the range of 1-12
- For Galileo I/NAV nominal frame structure, this refers to the subframe number in the range of 1-24
- For SBAS and Beidou CNAV2, this is unused and can be set to -1.
- For QZSS L1 C/A subframe 4 and 5, this value corresponds to the 'frame id' of the navigation message, in the range of 1-25 (Subframe 1, 2, 3 does not contain a 'frame id' and this value can be set to -1.)
- For Beidou CNAV1 this refers to the page type number in the range of 1-63.
- For IRNSS L5 C/A subframe 3 and 4, this value corresponds to the Message Id of the navigation message, in the range of 1-63. (Subframe 1 and 2 does not contain a message type id and this value can be set to -1.)

Returns
`int` | Value is between -1 and 120 inclusive

### getStatus

    public int getStatus ()

Gets the Status of the navigation message contained in the object.

Returns
`int` | Value is `STATUS_UNKNOWN`, `STATUS_PARITY_PASSED`, or `STATUS_PARITY_REBUILT`

### getSubmessageId

    public int getSubmessageId ()

Gets the sub-message identifier, relevant to the `getType()` of the message.

- For GPS L1 C/A, BeiDou D1 & BeiDou D2, the submessage id corresponds to the subframe number of the navigation message, in the range of 1-5.
- For Glonass L1 C/A, this refers to the String number, in the range from 1-15
- For Galileo F/NAV, this refers to the page type in the range 1-6
- For Galileo I/NAV, this refers to the word type in the range 1-10+
- For Galileo in particular, the type information embedded within the data bits may be even more useful in interpretation, than the nominal page and word types provided in this field.
- For SBAS, the submessage id corresponds to the message type, in the range 1-63.
- For Beidou CNAV1, the submessage id corresponds to the subframe number of the navigation message, in the range of 1-3.
- For Beidou CNAV2, the submessage id corresponds to the message type, in the range 1-63.
- For IRNSS L5 C/A, the submessage id corresponds to the subframe number of the navigation message, in the range of 1-4.

Returns
`int` | Value is 1 or greater

### getSvid

    public int getSvid ()

Gets the satellite ID.

Range varies by constellation. See definition at `GnssStatus#getSvid(int)`

Returns
`int` | Value is between 1 and 200 inclusive

### getType

    public int getType ()

Gets the type of the navigation message contained in the object.

Returns
`int` | Value is `TYPE_UNKNOWN`, `TYPE_GPS_L1CA`, `TYPE_GPS_L2CNAV`, `TYPE_GPS_L5CNAV`, `TYPE_GPS_CNAV2`, `TYPE_SBS`, `TYPE_GLO_L1CA`, `TYPE_QZS_L1CA`, `TYPE_BDS_D1`, `TYPE_BDS_D2`, `TYPE_BDS_CNAV1`, `TYPE_BDS_CNAV2`, `TYPE_GAL_I`, `TYPE_GAL_F`, or `TYPE_IRN_L5CA`

### toString

    public String toString ()

Returns a string representation of the object. In general, the `toString` method returns a string that "textually represents" this object. The result should be a concise but informative representation that is easy for a person to read. It is recommended that all subclasses override this method.

The `toString` method for class `Object` returns a string consisting of the name of the class of which the object is an instance, the at-sign character ``@`', and the unsigned hexadecimal representation of the hash code of the object. In other words, this method returns a string equal to the value of:

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

Returns
`String` | a string representation of the object.

### writeToParcel

    public void writeToParcel (Parcel parcel,
                    int flags)

Flatten this object in to a Parcel.

Parameters
`parcel` | `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.PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES

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