Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Nested Classes](https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#nestedclasses) \| [Constants](https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#constants) \| [Inherited Constants](https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#inhconstants) \| [Fields](https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#lfields) \| [Methods](https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#inhmethods)

# DlTdoaRangingParams

*** ** * ** ***


`
public

final

class
DlTdoaRangingParams
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


implements

https://developer.android.com/reference/android/os/Parcelable


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.ranging.uwb.DlTdoaRangingParams |

<br />

*** ** * ** ***

Class to represent UWB Downlink TDoA ranging parameters.

## Summary

| ### Nested classes ||
|---|---|
| ` class` | `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams.Builder` Builder for `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams`. |

| ### Constants ||
|---|---|
| `int` | `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#MEASUREMENT_VERSION_1` DL-TDoA Ranging Measurement version 1 |
| `int` | `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#MEASUREMENT_VERSION_2` DL-TDoA Ranging Measurement version 2 |
| `int` | `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#MEASUREMENT_VERSION_UNKNOWN` DL-TDoA Ranging Measurement version unknown |

| ### Inherited constants |
|---|
| From interface `https://developer.android.com/reference/android/os/Parcelable` |---|---| | `int` | `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` Descriptor bit used with `https://developer.android.com/reference/android/os/Parcelable#describeContents()`: indicates that the Parcelable object's flattened representation includes a file descriptor. | | `int` | `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` Flag for use with `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`: 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 https://developer.android.com/reference/android/os/Parcelable.Creator<https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams>` | `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#CREATOR` |

| ### Public methods ||
|---|---|
| ` static https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#createFromFiraConfigPacket(byte[],%20byte[])(byte[] config, byte[] rangingRoundIndexes) ` Creates a `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams` from a FiRa compliant configuration packet. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. |
| ` boolean` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object o) ` Indicates whether some other object is "equal to" this one. |
| ` https://developer.android.com/reference/android/ranging/uwb/UwbComplexChannel` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getComplexChannel()() ` Gets the complex channel used for the session. |
| ` https://developer.android.com/reference/android/ranging/uwb/UwbAddress` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getDeviceAddress()() ` Gets the UWB address of the device. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getMeasurementVersion()() ` Gets the measurement version. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getRangingIntervalMillis()() ` Gets the ranging interval in milliseconds. |
| ` byte[]` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getRangingRoundIndexes()() ` Gets the active ranging round indexes. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getSessionId()() ` Gets the session ID. |
| ` byte[]` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getSessionKeyInfo()() ` Gets the session key information. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getSlotDuration()() ` Gets the slot duration. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#getSlotsPerRangingRound()() ` Gets the number of slots per ranging round. |
| ` int` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#hashCode()() ` Returns a hash code value for the object. |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#toString()() ` Returns a string representation of the object. |
| ` void` | ` https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel dest, int flags) ` Flatten this object in to a Parcel. |

| ### Inherited methods |
|---|---|
| From class ` https://developer.android.com/reference/java/lang/Object ` |---|---| | ` https://developer.android.com/reference/java/lang/Object` | ` https://developer.android.com/reference/java/lang/Object#clone()() ` Creates and returns a copy of this object. | | ` boolean` | ` https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` https://developer.android.com/reference/java/lang/Object#finalize()() ` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. | | ` final https://developer.android.com/reference/java/lang/Class<?>` | ` https://developer.android.com/reference/java/lang/Object#getClass()() ` Returns the runtime class of this `Object`. | | ` int` | ` https://developer.android.com/reference/java/lang/Object#hashCode()() ` Returns a hash code value for the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notify()() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#notifyAll()() ` Wakes up all threads that are waiting on this object's monitor. | | ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/java/lang/Object#toString()() ` Returns a string representation of the object. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long,%20int)(long timeoutMillis, int nanos) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait(long)(long timeoutMillis) ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*, or until a certain amount of real time has elapsed. | | ` final void` | ` https://developer.android.com/reference/java/lang/Object#wait()() ` Causes the current thread to wait until it is awakened, typically by being *notified* or *interrupted*. | ||
| From interface ` https://developer.android.com/reference/android/os/Parcelable ` |---|---| | ` abstract int` | ` https://developer.android.com/reference/android/os/Parcelable#describeContents()() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. | | ` abstract void` | ` https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)(https://developer.android.com/reference/android/os/Parcel dest, int flags) ` Flatten this object in to a Parcel. | ||

## Constants

### MEASUREMENT_VERSION_1

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final int MEASUREMENT_VERSION_1
```

DL-TDoA Ranging Measurement version 1

<br />

Constant Value:

1
(0x00000001)


### MEASUREMENT_VERSION_2

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final int MEASUREMENT_VERSION_2
```

DL-TDoA Ranging Measurement version 2

<br />

Constant Value:

2
(0x00000002)


### MEASUREMENT_VERSION_UNKNOWN

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final int MEASUREMENT_VERSION_UNKNOWN
```

DL-TDoA Ranging Measurement version unknown

<br />

Constant Value:

2147483647
(0x7fffffff)


## Fields

### CREATOR

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static final Creator<DlTdoaRangingParams> CREATOR
```

<br />

<br />

## Public methods

### createFromFiraConfigPacket

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static DlTdoaRangingParams createFromFiraConfigPacket (byte[] config, 
                byte[] rangingRoundIndexes)
```

Creates a `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams` from a FiRa compliant configuration packet.

<br />

| Parameters ||
|---|---|
| `config` | `byte`: The byte array containing the FiRa Specific OOB Vendor Specific Element (VSE) for BLE or WiFi. This value cannot be `null`. <br /> |
| `rangingRoundIndexes` | `byte`: The active ranging round indexes. If `null`, the indexes may be extracted from the WiFi Time Sync sub-element in `config` if present; otherwise, the default value from `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams.Builder` is used. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams` | A `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams` instance. This value cannot be `null`. <br /> |

| Throws ||
|---|---|
| `https://developer.android.com/reference/java/lang/IllegalArgumentException` | if the configuration packet is malformed or missing mandatory fields. |

**See also:**

- `https://developer.android.com/ for the configuration packet format./https://groups.firaconsortium.org/wg/FPSG/document/5944 for the configuration packet format.)`

### describeContents

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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 `https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)`,
the return value of this method must include the
`https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` bit.

<br />

| Returns ||
|---|---|
| `int` | a bitmask indicating the set of special object types marshaled by this Parcelable object instance. Value is either `0` or - `https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR` |

### equals

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public 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.

<br />

| Parameters ||
|---|---|
| `o` | `Object`: the reference object with which to compare. <br /> |

| Returns ||
|---|---|
| `boolean` | `true` if this object is the same as the obj argument; `false` otherwise. <br /> |

### getComplexChannel

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public UwbComplexChannel getComplexChannel ()
```

Gets the complex channel used for the session.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/ranging/uwb/UwbComplexChannel` | A `https://developer.android.com/reference/android/ranging/uwb/UwbComplexChannel` object containing channel and preamble index. This value cannot be `null`. <br /> |

### getDeviceAddress

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public UwbAddress getDeviceAddress ()
```

Gets the UWB address of the device.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/android/ranging/uwb/UwbAddress` | The `https://developer.android.com/reference/android/ranging/uwb/UwbAddress` of the device. This value cannot be `null`. <br /> |

### getMeasurementVersion

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getMeasurementVersion ()
```

Gets the measurement version.

<br />

| Returns ||
|---|---|
| `int` | The measurement version. Value is one of the following: - `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#MEASUREMENT_VERSION_1` - `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#MEASUREMENT_VERSION_2` - `https://developer.android.com/reference/android/ranging/uwb/DlTdoaRangingParams#MEASUREMENT_VERSION_UNKNOWN` |

### getRangingIntervalMillis

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getRangingIntervalMillis ()
```

Gets the ranging interval in milliseconds.

<br />

| Returns ||
|---|---|
| `int` | The ranging interval in milliseconds. <br /> |

### getRangingRoundIndexes

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public byte[] getRangingRoundIndexes ()
```

Gets the active ranging round indexes.

<br />

| Returns ||
|---|---|
| `byte[]` | This value may be `null`. <br /> |

### getSessionId

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getSessionId ()
```

Gets the session ID.

<br />

| Returns ||
|---|---|
| `int` | The session ID as an integer. <br /> |

### getSessionKeyInfo

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public byte[] getSessionKeyInfo ()
```

Gets the session key information.

<br />

| Returns ||
|---|---|
| `byte[]` | A byte array containing session key info, or null if not available. <br /> |

### getSlotDuration

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getSlotDuration ()
```

Gets the slot duration.

<br />

| Returns ||
|---|---|
| `int` | The slot duration. Value is one of the following: - `https://developer.android.com/reference/android/ranging/uwb/UwbRangingParams#DURATION_1_MS` - `https://developer.android.com/reference/android/ranging/uwb/UwbRangingParams#DURATION_2_MS` |

### getSlotsPerRangingRound

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public int getSlotsPerRangingRound ()
```

Gets the number of slots per ranging round.

<br />

| Returns ||
|---|---|
| `int` | The number of slots per ranging round. <br /> |

### hashCode

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
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
`https://developer.android.com/reference/java/util/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 `https://developer.android.com/reference/java/lang/Object#equals(java.lang.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 `https://developer.android.com/reference/java/lang/Object#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.

<br />

<br />

| Returns ||
|---|---|
| `int` | a hash code value for this object. <br /> |

### toString

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String toString ()
```

Returns a string representation of the object.

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | a string representation of the object. <br /> |

### writeToParcel

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void writeToParcel (Parcel dest, 
                int flags)
```

Flatten this object in to a Parcel.

<br />

| Parameters ||
|---|---|
| `dest` | `Parcel`: This value cannot be `null`. <br /> |
| `flags` | `int`: Additional flags about how the object should be written. May be 0 or `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE`. Value is either `0` or a combination of the following: - `https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE` |