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/DataSetObservable#inhfields) \| [Ctors](https://developer.android.com/reference/android/database/DataSetObservable#pubctors) \| [Methods](https://developer.android.com/reference/android/database/DataSetObservable#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/database/DataSetObservable#inhmethods)

# DataSetObservable

*** ** * ** ***

` public class DataSetObservable `   
` ` ` extends https://developer.android.com/reference/android/database/Observable<https://developer.android.com/reference/android/database/DataSetObserver> ` ` `

|---|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) |||
| ↳ | [android.database.Observable](https://developer.android.com/reference/android/database/Observable)\<[android.database.DataSetObserver](https://developer.android.com/reference/android/database/DataSetObserver)\> ||
|   | ↳ | android.database.DataSetObservable |

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*** ** * ** ***

A specialization of `https://developer.android.com/reference/android/database/Observable` for `https://developer.android.com/reference/android/database/DataSetObserver` that provides methods for sending notifications to a list of `https://developer.android.com/reference/android/database/DataSetObserver` objects.

## Summary

### Inherited fields

From class `https://developer.android.com/reference/android/database/Observable` ` protected final https://developer.android.com/reference/java/util/ArrayList<T>` `https://developer.android.com/reference/android/database/Observable#mObservers`

The list of observers.

| ### Public constructors ||
|---|---|
| ` https://developer.android.com/reference/android/database/DataSetObservable#DataSetObservable()() ` |

| ### Public methods ||
|---|---|
| ` void` | ` https://developer.android.com/reference/android/database/DataSetObservable#notifyChanged()() ` Invokes `https://developer.android.com/reference/android/database/DataSetObserver#onChanged()` on each observer. |
| ` void` | ` https://developer.android.com/reference/android/database/DataSetObservable#notifyInvalidated()() ` Invokes `https://developer.android.com/reference/android/database/DataSetObserver#onInvalidated()` on each observer. |

### Inherited methods

From class ` https://developer.android.com/reference/android/database/Observable ` ` void` ` https://developer.android.com/reference/android/database/Observable#registerObserver(T)(https://developer.android.com/reference/android/database/DataSetObserver observer) `

Adds an observer to the list.
` void` ` https://developer.android.com/reference/android/database/Observable#unregisterAll()() `

Remove all registered observers.
` void` ` https://developer.android.com/reference/android/database/Observable#unregisterObserver(T)(https://developer.android.com/reference/android/database/DataSetObserver observer) `

Removes a previously registered observer.
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

### DataSetObservable

```
public DataSetObservable ()
```

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## Public methods

### notifyChanged

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

```
public void notifyChanged ()
```

Invokes `https://developer.android.com/reference/android/database/DataSetObserver#onChanged()` on each observer. Called when the contents of the data set have changed. The recipient will obtain the new contents the next time it queries the data set.

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### notifyInvalidated

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

```
public void notifyInvalidated ()
```

Invokes `https://developer.android.com/reference/android/database/DataSetObserver#onInvalidated()` on each observer. Called when the data set is no longer valid and cannot be queried again, such as when the data set has been closed.

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