Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#inhmethods)

# AccessibilityNodeInfo.StructuredDataInfo

*** ** * ** ***

` public static abstract class AccessibilityNodeInfo.StructuredDataInfo `   
` extends https://developer.android.com/reference/java/lang/Object ` ` `

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.view.accessibility.AccessibilityNodeInfo.StructuredDataInfo |

Known direct subclasses [AccessibilityNodeInfo.MathInfo](https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.MathInfo) [AccessibilityNodeInfo.MathInfo](https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.MathInfo) A class that holds information about a node that represents a mathematical expression.   

*** ** * ** ***

An abstract base class for holding structured semantic information about a node.

This class provides a container for a "tag" (a string constant representing the node's role) and a set of key-value "attributes" that provide additional properties. This object can be attached to an `https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo` to give accessibility services rich, structured information about the node's meaning.

This class is intended to be subclassed for structured semantic standards.
**See also:**

- `https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo#getStructuredDataInfo()`
- `https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo#setStructuredDataInfo(android.view.accessibility.AccessibilityNodeInfo.StructuredDataInfo)`

## Summary

| ### Public methods ||
|---|---|
| ` boolean` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#equals(java.lang.Object)(https://developer.android.com/reference/java/lang/Object o) ` Indicates whether some other object is "equal to" this one. |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#getAttribute(java.lang.String)(https://developer.android.com/reference/java/lang/String attributeKey) ` Gets the value of an attribute. |
| ` https://developer.android.com/reference/java/util/Map<https://developer.android.com/reference/java/lang/String, https://developer.android.com/reference/java/lang/String>` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#getAttributes()() ` |
| ` https://developer.android.com/reference/java/lang/String` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#getTag()() ` |
| ` int` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#hashCode()() ` Returns a hash code value for the object. |
| ` void` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#putAttribute(java.lang.String,%20java.lang.String)(https://developer.android.com/reference/java/lang/String attributeKey, https://developer.android.com/reference/java/lang/String value) ` Adds an attribute. |
| ` void` | ` https://developer.android.com/reference/android/view/accessibility/AccessibilityNodeInfo.StructuredDataInfo#removeAttribute(java.lang.String)(https://developer.android.com/reference/java/lang/String attributeKey) ` Removes an attribute. |

### Inherited methods

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 methods

### equals

Added in [API level 37](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.

<br />

| Parameters ||
|---|---|
| `o` | `Object`: the reference object with which to compare. <br /> |

| Returns ||
|---|---|
| `boolean` | `true` if this object is the same as the obj argument; `false` otherwise. <br /> |

### getAttribute

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String getAttribute (String attributeKey)
```

Gets the value of an attribute.

<br />

| Parameters ||
|---|---|
| `attributeKey` | `String`: The attribute key. This value cannot be `null`. <br /> |

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | The attribute value. This value may be `null`. <br /> |

### getAttributes

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public Map<String, String> getAttributes ()
```

<br />

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/Map<https://developer.android.com/reference/java/lang/String, https://developer.android.com/reference/java/lang/String>` | The map of attributes. This value cannot be `null`. <br /> |

### getTag

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public String getTag ()
```

<br />

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/lang/String` | The tag for this structured semantic information. This value cannot be `null`. <br /> |

### hashCode

Added in [API level 37](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 `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 `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 `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.

<br />

<br />

| Returns ||
|---|---|
| `int` | a hash code value for this object. <br /> |

### putAttribute

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void putAttribute (String attributeKey, 
                String value)
```

Adds an attribute.

<br />

| Parameters ||
|---|---|
| `attributeKey` | `String`: The attribute key. This value cannot be `null`. <br /> |
| `value` | `String`: The attribute value. This value cannot be `null`. <br /> |

### removeAttribute

Added in [API level 37](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public void removeAttribute (String attributeKey)
```

Removes an attribute.

<br />

| Parameters ||
|---|---|
| `attributeKey` | `String`: The attribute key. This value cannot be `null`. <br /> |