Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Ctors](https://developer.android.com/reference/android/content/AsyncQueryHandler.WorkerHandler#pubctors) \| [Methods](https://developer.android.com/reference/android/content/AsyncQueryHandler.WorkerHandler#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/content/AsyncQueryHandler.WorkerHandler#inhmethods)

# AsyncQueryHandler.WorkerHandler

*** ** * ** ***

` protected class AsyncQueryHandler.WorkerHandler `   
` ` ` extends https://developer.android.com/reference/android/os/Handler ` ` `

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [android.os.Handler](https://developer.android.com/reference/android/os/Handler) ||
|   | ↳ | android.content.AsyncQueryHandler.WorkerHandler |

<br />

*** ** * ** ***

## Summary

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/android/content/AsyncQueryHandler.WorkerHandler#WorkerHandler(android.os.Looper)(https://developer.android.com/reference/android/os/Looper looper) ` |

| ### Public methods ||
|---|---|
| ` void` | ` https://developer.android.com/reference/android/content/AsyncQueryHandler.WorkerHandler#handleMessage(android.os.Message)(https://developer.android.com/reference/android/os/Message msg) ` Subclasses must implement this to receive messages. |

### Inherited methods

From class ` https://developer.android.com/reference/android/os/Handler ` ` static https://developer.android.com/reference/android/os/Handler` ` https://developer.android.com/reference/android/os/Handler#createAsync(android.os.Looper,%20android.os.Handler.Callback)(https://developer.android.com/reference/android/os/Looper looper, https://developer.android.com/reference/android/os/Handler.Callback callback) `

Create a new Handler whose posted messages and runnables are not subject to synchronization barriers such as display vsync.
` static https://developer.android.com/reference/android/os/Handler` ` https://developer.android.com/reference/android/os/Handler#createAsync(android.os.Looper)(https://developer.android.com/reference/android/os/Looper looper) `

Create a new Handler whose posted messages and runnables are not subject to synchronization barriers such as display vsync.
` void` ` https://developer.android.com/reference/android/os/Handler#dispatchMessage(android.os.Message)(https://developer.android.com/reference/android/os/Message msg) `

Handle system messages here.
` final void` ` https://developer.android.com/reference/android/os/Handler#dump(android.util.Printer,%20java.lang.String)(https://developer.android.com/reference/android/util/Printer pw, https://developer.android.com/reference/java/lang/String prefix) ` ` final https://developer.android.com/reference/android/os/Looper` ` https://developer.android.com/reference/android/os/Handler#getLooper()() ` ` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/android/os/Handler#getMessageName(android.os.Message)(https://developer.android.com/reference/android/os/Message message) `

Returns a string representing the name of the specified message.
` void` ` https://developer.android.com/reference/android/os/Handler#handleMessage(android.os.Message)(https://developer.android.com/reference/android/os/Message msg) `

Subclasses must implement this to receive messages.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#hasCallbacks(java.lang.Runnable)(https://developer.android.com/reference/java/lang/Runnable r) `

Check if there are any pending posts of messages with callback r in the message queue.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#hasMessages(int)(int what) `

Check if there are any pending posts of messages with code 'what' in the message queue.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#hasMessages(int,%20java.lang.Object)(int what, https://developer.android.com/reference/java/lang/Object object) `

Check if there are any pending posts of messages with code 'what' and whose obj is 'object' in the message queue.
` final https://developer.android.com/reference/android/os/Message` ` https://developer.android.com/reference/android/os/Handler#obtainMessage(int,%20java.lang.Object)(int what, https://developer.android.com/reference/java/lang/Object obj) `

Same as `https://developer.android.com/reference/android/os/Handler#obtainMessage()`, except that it also sets the what and obj members of the returned Message.
` final https://developer.android.com/reference/android/os/Message` ` https://developer.android.com/reference/android/os/Handler#obtainMessage()() `

Returns a new `https://developer.android.com/reference/android/os/Message` from the global message pool.
` final https://developer.android.com/reference/android/os/Message` ` https://developer.android.com/reference/android/os/Handler#obtainMessage(int,%20int,%20int)(int what, int arg1, int arg2) `

Same as `https://developer.android.com/reference/android/os/Handler#obtainMessage()`, except that it also sets the what, arg1 and arg2 members of the returned Message.
` final https://developer.android.com/reference/android/os/Message` ` https://developer.android.com/reference/android/os/Handler#obtainMessage(int,%20int,%20int,%20java.lang.Object)(int what, int arg1, int arg2, https://developer.android.com/reference/java/lang/Object obj) `

Same as `https://developer.android.com/reference/android/os/Handler#obtainMessage()`, except that it also sets the what, obj, arg1,and arg2 values on the returned Message.
` final https://developer.android.com/reference/android/os/Message` ` https://developer.android.com/reference/android/os/Handler#obtainMessage(int)(int what) `

Same as `https://developer.android.com/reference/android/os/Handler#obtainMessage()`, except that it also sets the what member of the returned Message.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#post(java.lang.Runnable)(https://developer.android.com/reference/java/lang/Runnable r) `

Causes the Runnable r to be added to the message queue.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#postAtFrontOfQueue(java.lang.Runnable)(https://developer.android.com/reference/java/lang/Runnable r) `

Posts a message to an object that implements Runnable.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#postAtTime(java.lang.Runnable,%20long)(https://developer.android.com/reference/java/lang/Runnable r, long uptimeMillis) `

Causes the Runnable r to be added to the message queue, to be run at a specific time given by <var translate="no">uptimeMillis</var>.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#postAtTime(java.lang.Runnable,%20java.lang.Object,%20long)(https://developer.android.com/reference/java/lang/Runnable r, https://developer.android.com/reference/java/lang/Object token, long uptimeMillis) `

Causes the Runnable r to be added to the message queue, to be run at a specific time given by <var translate="no">uptimeMillis</var>.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#postDelayed(java.lang.Runnable,%20long)(https://developer.android.com/reference/java/lang/Runnable r, long delayMillis) `

Causes the Runnable r to be added to the message queue, to be run after the specified amount of time elapses.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#postDelayed(java.lang.Runnable,%20java.lang.Object,%20long)(https://developer.android.com/reference/java/lang/Runnable r, https://developer.android.com/reference/java/lang/Object token, long delayMillis) `

Causes the Runnable r to be added to the message queue, to be run after the specified amount of time elapses.
` final void` ` https://developer.android.com/reference/android/os/Handler#removeCallbacks(java.lang.Runnable)(https://developer.android.com/reference/java/lang/Runnable r) `

Remove any pending posts of Runnable r that are in the message queue.
` final void` ` https://developer.android.com/reference/android/os/Handler#removeCallbacks(java.lang.Runnable,%20java.lang.Object)(https://developer.android.com/reference/java/lang/Runnable r, https://developer.android.com/reference/java/lang/Object token) `

Remove any pending posts of Runnable <var translate="no">r</var> with Object <var translate="no">token</var> that are in the message queue.
` final void` ` https://developer.android.com/reference/android/os/Handler#removeCallbacksAndMessages(java.lang.Object)(https://developer.android.com/reference/java/lang/Object token) `

Remove any pending posts of callbacks and sent messages whose <var translate="no">obj</var> is <var translate="no">token</var>.
` final void` ` https://developer.android.com/reference/android/os/Handler#removeMessages(int)(int what) `

Remove any pending posts of messages with code 'what' that are in the message queue.
` final void` ` https://developer.android.com/reference/android/os/Handler#removeMessages(int,%20java.lang.Object)(int what, https://developer.android.com/reference/java/lang/Object object) `

Remove any pending posts of messages with code 'what' and whose obj is 'object' that are in the message queue.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#sendEmptyMessage(int)(int what) `

Sends a Message containing only the what value.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#sendEmptyMessageAtTime(int,%20long)(int what, long uptimeMillis) `

Sends a Message containing only the what value, to be delivered at a specific time.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#sendEmptyMessageDelayed(int,%20long)(int what, long delayMillis) `

Sends a Message containing only the what value, to be delivered after the specified amount of time elapses.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#sendMessage(android.os.Message)(https://developer.android.com/reference/android/os/Message msg) `

Pushes a message onto the end of the message queue after all pending messages before the current time.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#sendMessageAtFrontOfQueue(android.os.Message)(https://developer.android.com/reference/android/os/Message msg) `

Enqueue a message at the front of the message queue, to be processed on the next iteration of the message loop.
` boolean` ` https://developer.android.com/reference/android/os/Handler#sendMessageAtTime(android.os.Message,%20long)(https://developer.android.com/reference/android/os/Message msg, long uptimeMillis) `

Enqueue a message into the message queue after all pending messages before the absolute time (in milliseconds) <var translate="no">uptimeMillis</var>.
` final boolean` ` https://developer.android.com/reference/android/os/Handler#sendMessageDelayed(android.os.Message,%20long)(https://developer.android.com/reference/android/os/Message msg, long delayMillis) `

Enqueue a message into the message queue after all pending messages before (current time + delayMillis).
` https://developer.android.com/reference/java/lang/String` ` https://developer.android.com/reference/android/os/Handler#toString()() `

Returns a string representation of the object.
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*.

## Public constructors

### WorkerHandler

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public WorkerHandler (Looper looper)
```

<br />

<br />

| Parameters ||
|---|---|
| `looper` | `Looper` <br /> |

## Public methods

### handleMessage

Added in [API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void handleMessage (Message msg)
```

Subclasses must implement this to receive messages.

<br />

| Parameters ||
|---|---|
| `msg` | `Message`: This value cannot be `null`. <br /> |