Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels) Summary: [Methods](https://developer.android.com/reference/android/view/inspector/WindowInspector#pubmethods) \| [Inherited Methods](https://developer.android.com/reference/android/view/inspector/WindowInspector#inhmethods)

# WindowInspector

*** ** * ** ***

[Kotlin](https://developer.android.com/reference/kotlin/android/view/inspector/WindowInspector "View this page in Kotlin") \|Java


`
public

final

class
WindowInspector
`


`

extends https://developer.android.com/reference/java/lang/Object


`

`


`

|---|---|
| [java.lang.Object](https://developer.android.com/reference/java/lang/Object) ||
| ↳ | android.view.inspector.WindowInspector |

<br />

*** ** * ** ***

Provides access to window inspection information.

## Summary

| ### Public methods ||
|---|---|
| ` static void` | ` https://developer.android.com/reference/android/view/inspector/WindowInspector#addGlobalWindowViewsListener(java.util.concurrent.Executor,%20java.util.function.Consumer<java.util.List<android.view.View>>)(https://developer.android.com/reference/java/util/concurrent/Executor executor, https://developer.android.com/reference/java/util/function/Consumer<https://developer.android.com/reference/java/util/List<https://developer.android.com/reference/android/view/View>> consumer) ` Adds a listener that is notified whenever the value of `https://developer.android.com/reference/android/view/inspector/WindowInspector#getGlobalWindowViews()` changes. |
| ` static https://developer.android.com/reference/java/util/List<https://developer.android.com/reference/android/view/View>` | ` https://developer.android.com/reference/android/view/inspector/WindowInspector#getGlobalWindowViews()() ` |
| ` static void` | ` https://developer.android.com/reference/android/view/inspector/WindowInspector#removeGlobalWindowViewsListener(java.util.function.Consumer<java.util.List<android.view.View>>)(https://developer.android.com/reference/java/util/function/Consumer<https://developer.android.com/reference/java/util/List<https://developer.android.com/reference/android/view/View>> consumer) ` Removes a listener from getting notifications of global window views changes. |

| ### 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

### addGlobalWindowViewsListener

Added in [version 36.1](https://developer.android.com/topic/libraries/support-library/revisions)

```
public static void addGlobalWindowViewsListener (Executor executor, 
                Consumer<List<View>> consumer)
```

Adds a listener that is notified whenever the value of `https://developer.android.com/reference/android/view/inspector/WindowInspector#getGlobalWindowViews()`
changes. The current value is provided immediately using the provided `https://developer.android.com/reference/java/util/concurrent/Executor`. The
value is initially relayed using the main thread and then posted to the `https://developer.android.com/reference/java/util/concurrent/Executor`.
Using a direct `https://developer.android.com/reference/java/util/concurrent/Executor` and doing heavy calculations can cause performance issues.
If this `https://developer.android.com/reference/java/util/function/Consumer` is already registered, then this method is a no op.

<br />

| Parameters ||
|---|---|
| `executor` | `Executor`: This value cannot be `null`. <br /> |
| `consumer` | `Consumer`: This value cannot be `null`. <br /> |

**See also:**

- `https://developer.android.com/reference/android/view/inspector/WindowInspector#getGlobalWindowViews()`

### getGlobalWindowViews

Added in [API level 29](https://developer.android.com/guide/topics/manifest/uses-sdk-element#ApiLevels)

```
public static List<View> getGlobalWindowViews ()
```

<br />

<br />

| Returns ||
|---|---|
| `https://developer.android.com/reference/java/util/List<https://developer.android.com/reference/android/view/View>` | the list of all window views attached to the current process. This value cannot be `null`. <br /> |

### removeGlobalWindowViewsListener

Added in [version 36.1](https://developer.android.com/topic/libraries/support-library/revisions)

```
public static void removeGlobalWindowViewsListener (Consumer<List<View>> consumer)
```

Removes a listener from getting notifications of global window views changes. If the
`https://developer.android.com/reference/java/util/function/Consumer` is not registered this method is a no op.

<br />

| Parameters ||
|---|---|
| `consumer` | `Consumer`: This value cannot be `null`. <br /> |

**See also:**

- `https://developer.android.com/reference/android/view/inspector/WindowInspector#addGlobalWindowViewsListener(java.util.concurrent.Executor,%20java.util.function.Consumer<java.util.List<android.view.View>>)`