# ContentObservable
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
Summary:[Inherited Fields](https://developer.android.com/reference/android/database/ContentObservable#inhfields)\|[Ctors](https://developer.android.com/reference/android/database/ContentObservable#pubctors)\|[Methods](https://developer.android.com/reference/android/database/ContentObservable#pubmethods)\|[Inherited Methods](https://developer.android.com/reference/android/database/ContentObservable#inhmethods)
# ContentObservable
*** ** * ** ***
[Kotlin](https://developer.android.com/reference/kotlin/android/database/ContentObservable "View this page in Kotlin")\|Java
`
public
class
ContentObservable
`
`
``
extends `[Observable](https://developer.android.com/reference/android/database/Observable)`<`[ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)`>
``
`
|---|---|------------------------------------|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [android.database.Observable](https://developer.android.com/reference/android/database/Observable)\<[android.database.ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)\> ||
| | ↳ | android.database.ContentObservable |
*** ** * ** ***
A specialization of[Observable](https://developer.android.com/reference/android/database/Observable)for[ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)that provides methods for sending notifications to a list of[ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)objects.
## Summary
| ### Inherited fields |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| From class[android.database.Observable](https://developer.android.com/reference/android/database/Observable) |--------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------| | ` protected final `[ArrayList](https://developer.android.com/reference/java/util/ArrayList)`` | [mObservers](https://developer.android.com/reference/android/database/Observable#mObservers) The list of observers. | |
| ### Public constructors ||
|-----------------------------------------------------------------------------------------------------------------------------|---|
| ` `[ContentObservable](https://developer.android.com/reference/android/database/ContentObservable#ContentObservable())`() ` |
| ### Public methods ||
|---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ` void` | ` `[dispatchChange](https://developer.android.com/reference/android/database/ContentObservable#dispatchChange(boolean))`(boolean selfChange) ` *This method was deprecated in API level 16. Use[dispatchChange(boolean, android.net.Uri)](https://developer.android.com/reference/android/database/ContentObservable#dispatchChange(boolean,%20android.net.Uri))instead.* |
| ` void` | ` `[dispatchChange](https://developer.android.com/reference/android/database/ContentObservable#dispatchChange(boolean,%20android.net.Uri))`(boolean selfChange, `[Uri](https://developer.android.com/reference/android/net/Uri)` uri) ` Invokes[ContentObserver.dispatchChange(boolean, Uri)](https://developer.android.com/reference/android/database/ContentObserver#dispatchChange(boolean,%20android.net.Uri))on each observer. |
| ` void` | ` `[notifyChange](https://developer.android.com/reference/android/database/ContentObservable#notifyChange(boolean))`(boolean selfChange) ` *This method was deprecated in API level 16. Use[dispatchChange(boolean)](https://developer.android.com/reference/android/database/ContentObservable#dispatchChange(boolean))instead.* |
| ` void` | ` `[registerObserver](https://developer.android.com/reference/android/database/ContentObservable#registerObserver(android.database.ContentObserver))`(`[ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)` observer) ` Adds an observer to the list. |
| ### Inherited methods |
|-----------------------|---|
| From class` `[android.database.Observable](https://developer.android.com/reference/android/database/Observable)` ` |---------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | ` void` | ` `[registerObserver](https://developer.android.com/reference/android/database/Observable#registerObserver(T))`(`[ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)` observer) ` Adds an observer to the list. | | ` void` | ` `[unregisterAll](https://developer.android.com/reference/android/database/Observable#unregisterAll())`() ` Remove all registered observers. | | ` void` | ` `[unregisterObserver](https://developer.android.com/reference/android/database/Observable#unregisterObserver(T))`(`[ContentObserver](https://developer.android.com/reference/android/database/ContentObserver)` observer) ` Removes a previously registered observer. | ||
| 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*. | ||
## Public constructors
### ContentObservable
```
public ContentObservable ()
```
## Public methods
### dispatchChange
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
Deprecated in[API level 16](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void dispatchChange (boolean selfChange)
```
**This method was deprecated in API level 16.**
Use[dispatchChange(boolean, android.net.Uri)](https://developer.android.com/reference/android/database/ContentObservable#dispatchChange(boolean,%20android.net.Uri))instead.
Invokes[ContentObserver.dispatchChange(boolean)](https://developer.android.com/reference/android/database/ContentObserver#dispatchChange(boolean))on each observer.
If`selfChange`is true, only delivers the notification to the observer if it has indicated that it wants to receive self-change notifications by implementing[ContentObserver.deliverSelfNotifications](https://developer.android.com/reference/android/database/ContentObserver#deliverSelfNotifications())to return true.
| Parameters ||
|--------------|---------------------------------------------------------------|
| `selfChange` | `boolean`: True if this is a self-change notification.
|
### dispatchChange
Added in[API level 16](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void dispatchChange (boolean selfChange,
Uri uri)
```
Invokes[ContentObserver.dispatchChange(boolean, Uri)](https://developer.android.com/reference/android/database/ContentObserver#dispatchChange(boolean,%20android.net.Uri))on each observer. Includes the changed content Uri when available.
If`selfChange`is true, only delivers the notification to the observer if it has indicated that it wants to receive self-change notifications by implementing[ContentObserver.deliverSelfNotifications](https://developer.android.com/reference/android/database/ContentObserver#deliverSelfNotifications())to return true.
| Parameters ||
|--------------|-------------------------------------------------------------------|
| `selfChange` | `boolean`: True if this is a self-change notification.
|
| `uri` | `Uri`: The Uri of the changed content, or null if unknown.
|
### notifyChange
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
Deprecated in[API level 16](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void notifyChange (boolean selfChange)
```
**This method was deprecated in API level 16.**
Use[dispatchChange(boolean)](https://developer.android.com/reference/android/database/ContentObservable#dispatchChange(boolean))instead.
Invokes[ContentObserver.onChange](https://developer.android.com/reference/android/database/ContentObserver#onChange(boolean))on each observer.
| Parameters ||
|--------------|---------------------------------------------------------------|
| `selfChange` | `boolean`: True if this is a self-change notification.
|
### registerObserver
Added in[API level 1](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)
```
public void registerObserver (ContentObserver observer)
```
Adds an observer to the list. The observer cannot be null and it must not already be registered.
| Parameters ||
|------------|----------------------------------------------------|
| `observer` | `ContentObserver`: the observer to register
|