Window.FindViewById Method

Definition

Namespace:: Android.Views

Assembly:: Mono.Android.dll

Important

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Overloads

Name	Description
FindViewById(Int32)	Finds a view that was identified by the `android:id` XML attribute that was processed in `android.app.Activity#onCreate`.
FindViewById<T>(Int32)	Finds the view with the specified ID as the requested type.

FindViewById(Int32)

Finds a view that was identified by the android:id XML attribute that was processed in android.app.Activity#onCreate.

[Android.Runtime.Register("findViewById", "(I)Landroid/view/View;", "GetFindViewById_IHandler")]
public virtual Android.Views.View? FindViewById(int id);

[<Android.Runtime.Register("findViewById", "(I)Landroid/view/View;", "GetFindViewById_IHandler")>]
abstract member FindViewById : int -> Android.Views.View
override this.FindViewById : int -> Android.Views.View

Parameters

id: Int32

the ID to search for

Returns

View

a view with given ID if found, or null otherwise

Attributes: RegisterAttribute

Remarks

Finds a view that was identified by the android:id XML attribute that was processed in android.app.Activity#onCreate.

This will implicitly call #getDecorView with all of the associated side-effects.

<strong>Note:</strong> In most cases -- depending on compiler support -- the resulting view is automatically cast to the target class type. If the target class type is unconstrained, an explicit cast may be necessary.

Java documentation for android.view.Window.findViewById(int).

Portions of this page are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.

Applies to

FindViewById<T>(Int32)

Finds the view with the specified ID as the requested type.

public T? FindViewById<T>(int id) where T : Android.Views.View;

member this.FindViewById : int -> 'T (requires 'T :> Android.Views.View)

Type Parameters

T

The expected view type.

Parameters

id: Int32

The resource identifier of the view to find.

Returns

The matching view as T, or null when no view with id exists.

Remarks

This managed convenience overload performs the same search as the non-generic overload. It returns null only when no view with id exists; it throws InvalidCastException when the matching view cannot be cast to T.

Applies to