Added in API level 3

ResultReceiver

Kotlin |Java

public class ResultReceiver
extends Object implements Parcelable

java.lang.Object
↳	android.os.ResultReceiver

Generic interface for receiving a callback result from someone. Use this by creating a subclass and implement onReceiveResult(int, Bundle), which you can then pass to others and send through IPC, and receive results they supply with send(int, Bundle).

Note: the implementation underneath is just a simple wrapper around a Binder that is used to perform the communication. This means semantically you should treat it as such: this class does not impact process lifecycle management (you must be using some higher-level component to tell the system that your process needs to continue running), the connection will break if your process goes away for any reason, etc.

Summary

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<ResultReceiver>`	`CREATOR`

Public constructors
`ResultReceiver(Handler handler)` Create a new ResultReceive to receive results.

Public methods
`int`	`describeContents()` Describe the kinds of special objects contained in this Parcelable instance's marshaled representation.
`void`	`send(int resultCode, Bundle resultData)` Deliver a result to this receiver.
`void`	`writeToParcel(Parcel out, int flags)` Flatten this object in to a Parcel.

Protected methods
`void`	`onReceiveResult(int resultCode, Bundle resultData)` Override to receive results delivered to this object.

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 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(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()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

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.

Fields

CREATOR

Added in API level 3

public static final Creator<ResultReceiver> CREATOR

Public constructors

ResultReceiver

Added in API level 3

public ResultReceiver (Handler handler)

Create a new ResultReceive to receive results. Your onReceiveResult(int, Bundle) method will be called from the thread running handler if given, or from an arbitrary thread if null.

Parameters
`handler`	`Handler`

Public methods

describeContents

Added in API level 3

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`

send

Added in API level 3

public void send (int resultCode, 
                Bundle resultData)

Deliver a result to this receiver. Will call onReceiveResult(int, Bundle), always asynchronously if the receiver has supplied a Handler in which to dispatch the result.

Parameters
`resultCode`	`int`: Arbitrary result code to deliver, as defined by you.
`resultData`	`Bundle`: Any additional data provided by you.

writeToParcel

Added in API level 3

public void writeToParcel (Parcel out, 
                int flags)

Flatten this object in to a Parcel.

Parameters
`out`	`Parcel`: The Parcel in which the object should be written. 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`. Value is either `0` or a combination of `Parcelable.PARCELABLE_WRITE_RETURN_VALUE`, and android.os.Parcelable.PARCELABLE_ELIDE_DUPLICATES

Protected methods

onReceiveResult

Added in API level 3

protected void onReceiveResult (int resultCode, 
                Bundle resultData)

Override to receive results delivered to this object.

Parameters
`resultCode`	`int`: Arbitrary result code delivered by the sender, as defined by the sender.
`resultData`	`Bundle`: Any additional data provided by the sender.