# SignedContextualAds Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Also in[Ad Services Extensions 12](https://developer.android.com/sdkExtensions) Summary:[Nested Classes](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#nestedclasses)\|[Inherited Constants](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#inhconstants)\|[Fields](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#lfields)\|[Methods](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#inhmethods) # SignedContextualAds *** ** * ** *** [Kotlin](https://developer.android.com/reference/kotlin/android/adservices/adselection/SignedContextualAds "View this page in Kotlin")\|Java ` public final class SignedContextualAds ` ` extends `[Object](https://developer.android.com/reference/java/lang/Object)` `` implements `[Parcelable](https://developer.android.com/reference/android/os/Parcelable)` ` |---|----------------------------------------------------| | [java.lang.Object](https://developer.android.com/reference/java/lang/Object) || | ↳ | android.adservices.adselection.SignedContextualAds |
*** ** * ** *** Contains a list of buyer supplied[AdWithBid](https://developer.android.com/reference/android/adservices/adselection/AdWithBid)bundle and its signature. Instances of this class are created by SDKs to be injected as part of[AdSelectionConfig](https://developer.android.com/reference/android/adservices/adselection/AdSelectionConfig)and passed to[AdSelectionManager.selectAds](https://developer.android.com/reference/android/adservices/adselection/AdSelectionManager#selectAds(android.adservices.adselection.AdSelectionConfig,%20java.util.concurrent.Executor,%20android.os.OutcomeReceiver)) SignedContextualAds are signed using ECDSA algorithm with SHA256 hashing algorithm (aka SHA256withECDSA). Keys used should belong to P-256 curve (aka \\u201csecp256r1\\u201d or \\u201cprime256v1\\u201d). Signature should include the buyer, decisionLogicUri and adsWithBid fields. While creating the signature a specific serialization rules must be followed as it's outlined here: - `Objects`concatenate the serialized values of their fields with the`|`(pipe) in between each field - `All fields`are sorted by alphabetical order within the object - `Nullable fields`are skipped if they are null/unset - `Doubles`are converted to String preserving precision - `Integers`are converted to string values - `Sets`are sorted alphabetically - `Lists`keep the same order - `Strings`get encoded into byte\[\] using UTF-8 encoding
## Summary | ### Nested classes || |----------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` class` | [SignedContextualAds.Builder](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds.Builder) Builder for[SignedContextualAds](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds)object | | ### Inherited constants | |------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | From interface[android.os.Parcelable](https://developer.android.com/reference/android/os/Parcelable) |-------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `int` | [CONTENTS_FILE_DESCRIPTOR](https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR) Descriptor bit used with[describeContents()](https://developer.android.com/reference/android/os/Parcelable#describeContents()): indicates that the Parcelable object's flattened representation includes a file descriptor. | | `int` | [PARCELABLE_WRITE_RETURN_VALUE](https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE) Flag for use with[writeToParcel(Parcel, int)](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 `[Creator](https://developer.android.com/reference/android/os/Parcelable.Creator)`<`[SignedContextualAds](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds)`>` | [CREATOR](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#CREATOR)
| | ### Public methods || |----------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` int` | ` `[describeContents](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#describeContents())`() ` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation. | | ` boolean` | ` `[equals](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` o) ` Indicates whether some other object is "equal to" this one. | | ` `[List](https://developer.android.com/reference/java/util/List)`<`[AdWithBid](https://developer.android.com/reference/android/adservices/adselection/AdWithBid)`>` | ` `[getAdsWithBid](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#getAdsWithBid())`() ` | | ` `[AdTechIdentifier](https://developer.android.com/reference/android/adservices/common/AdTechIdentifier) | ` `[getBuyer](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#getBuyer())`() ` | | ` `[Uri](https://developer.android.com/reference/android/net/Uri) | ` `[getDecisionLogicUri](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#getDecisionLogicUri())`() ` | | ` byte[]` | ` `[getSignature](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#getSignature())`() ` Returns a copy of the signature for the contextual ads object. | | ` int` | ` `[hashCode](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#hashCode())`() ` Returns a hash code value for the object. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#toString())`() ` Returns a string representation of the object. | | ` void` | ` `[writeToParcel](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds#writeToParcel(android.os.Parcel,%20int))`(`[Parcel](https://developer.android.com/reference/android/os/Parcel)` dest, int flags) ` Flatten this object in to a Parcel. | | ### Inherited methods | |-----------------------|---| | From class` `[java.lang.Object](https://developer.android.com/reference/java/lang/Object)` ` |--------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` `[Object](https://developer.android.com/reference/java/lang/Object) | ` `[clone](https://developer.android.com/reference/java/lang/Object#clone())`() ` Creates and returns a copy of this object. | | ` boolean` | ` `[equals](https://developer.android.com/reference/java/lang/Object#equals(java.lang.Object))`(`[Object](https://developer.android.com/reference/java/lang/Object)` obj) ` Indicates whether some other object is "equal to" this one. | | ` void` | ` `[finalize](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 `[Class](https://developer.android.com/reference/java/lang/Class)`` | ` `[getClass](https://developer.android.com/reference/java/lang/Object#getClass())`() ` Returns the runtime class of this`Object`. | | ` int` | ` `[hashCode](https://developer.android.com/reference/java/lang/Object#hashCode())`() ` Returns a hash code value for the object. | | ` final void` | ` `[notify](https://developer.android.com/reference/java/lang/Object#notify())`() ` Wakes up a single thread that is waiting on this object's monitor. | | ` final void` | ` `[notifyAll](https://developer.android.com/reference/java/lang/Object#notifyAll())`() ` Wakes up all threads that are waiting on this object's monitor. | | ` `[String](https://developer.android.com/reference/java/lang/String) | ` `[toString](https://developer.android.com/reference/java/lang/Object#toString())`() ` Returns a string representation of the object. | | ` final void` | ` `[wait](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` | ` `[wait](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` | ` `[wait](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` `[android.os.Parcelable](https://developer.android.com/reference/android/os/Parcelable)` ` |------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` abstract int` | ` `[describeContents](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` | ` `[writeToParcel](https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int))`(`[Parcel](https://developer.android.com/reference/android/os/Parcel)` dest, int flags) ` Flatten this object in to a Parcel. | || ## Fields ### CREATOR Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Also in[Ad Services Extensions 12](https://developer.android.com/sdkExtensions) ``` public static final Creator CREATOR ```

## Public methods ### describeContents Added in[API level 35](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[writeToParcel(android.os.Parcel, int)](https://developer.android.com/reference/android/os/Parcelable#writeToParcel(android.os.Parcel,%20int)), the return value of this method must include the[CONTENTS_FILE_DESCRIPTOR](https://developer.android.com/reference/android/os/Parcelable#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](https://developer.android.com/reference/android/os/Parcelable#CONTENTS_FILE_DESCRIPTOR)
| ### equals Added in[API level 35](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.
| 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.
| ### getAdsWithBid Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Also in[Ad Services Extensions 12](https://developer.android.com/sdkExtensions) ``` public List getAdsWithBid () ```

| Returns || |-------------------------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------| | [List](https://developer.android.com/reference/java/util/List)`<`[AdWithBid](https://developer.android.com/reference/android/adservices/adselection/AdWithBid)`>` | the Ad data with bid value associated with this ad This value cannot be`null`.
| ### getBuyer Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Also in[Ad Services Extensions 12](https://developer.android.com/sdkExtensions) ``` public AdTechIdentifier getBuyer () ```

| Returns || |--------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------| | [AdTechIdentifier](https://developer.android.com/reference/android/adservices/common/AdTechIdentifier) | the Ad tech identifier from which this contextual Ad would have been downloaded This value cannot be`null`.
| ### getDecisionLogicUri Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Also in[Ad Services Extensions 12](https://developer.android.com/sdkExtensions) ``` public Uri getDecisionLogicUri () ```

| Returns || |----------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------| | [Uri](https://developer.android.com/reference/android/net/Uri) | the URI used to retrieve the updateBid() and reportWin() function used during the ad selection and reporting process This value cannot be`null`.
| ### getSignature Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Also in[Ad Services Extensions 12](https://developer.android.com/sdkExtensions) ``` public byte[] getSignature () ``` Returns a copy of the signature for the contextual ads object. See[SignedContextualAds](https://developer.android.com/reference/android/adservices/adselection/SignedContextualAds)for more details.
| Returns || |----------|--------------------------------------------------| | `byte[]` | the signature This value cannot be`null`.
| ### hashCode Added in[API level 35](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[HashMap](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[equals](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[equals](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.

| Returns || |-------|-------------------------------------------| | `int` | a hash code value for this object.
| ### toString Added in[API level 35](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) ``` public String toString () ``` Returns a string representation of the object.
| Returns || |--------------------------------------------------------------------|-----------------------------------------------| | [String](https://developer.android.com/reference/java/lang/String) | a string representation of the object.
| ### writeToParcel Added in[API level 35](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.
| Parameters || |---------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `dest` | `Parcel`: This value cannot be`null`.
| | `flags` | `int`: Additional flags about how the object should be written. May be 0 or[Parcelable.PARCELABLE_WRITE_RETURN_VALUE](https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE). Value is either`0`or a combination of[Parcelable.PARCELABLE_WRITE_RETURN_VALUE](https://developer.android.com/reference/android/os/Parcelable#PARCELABLE_WRITE_RETURN_VALUE), and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES
|