Android APIs
public class

MediaRouteButton

extends View
java.lang.Object
   ↳ android.view.View
     ↳ android.support.v7.app.MediaRouteButton

Class Overview

The media route button allows the user to select routes and to control the currently selected route.

The application must specify the kinds of routes that the user should be allowed to select by specifying a selector with the setRouteSelector(MediaRouteSelector) method.

When the default route is selected or when the currently selected route does not match the selector, the button will appear in an inactive state indicating that the application is not connected to a route of the kind that it wants to use. Clicking on the button opens a MediaRouteChooserDialog to allow the user to select a route. If no non-default routes match the selector and it is not possible for an active scan to discover any matching routes, then the button is disabled and cannot be clicked.

When a non-default route is selected that matches the selector, the button will appear in an active state indicating that the application is connected to a route of the kind that it wants to use. The button may also appear in an intermediary connecting state if the route is in the process of connecting to the destination but has not yet completed doing so. In either case, clicking on the button opens a MediaRouteControllerDialog to allow the user to control or disconnect from the current route.

Prerequisites

To use the media route button, the activity must be a subclass of FragmentActivity from the android.support.v4 support library. Refer to support library documentation for details.

Summary

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Inherited XML Attributes
From class android.view.View
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Inherited Constants
From class android.view.View
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Inherited Fields
From class android.view.View
Public Constructors
MediaRouteButton(Context context)
MediaRouteButton(Context context, AttributeSet attrs)
MediaRouteButton(Context context, AttributeSet attrs, int defStyleAttr)
Public Methods
MediaRouteDialogFactory getDialogFactory()
Gets the media route dialog factory to use when showing the route chooser or controller dialog.
MediaRouteSelector getRouteSelector()
Gets the media route selector for filtering the routes that the user can select using the media route chooser dialog.
void jumpDrawablesToCurrentState()
Call Drawable.jumpToCurrentState() on all Drawable objects associated with this view.
void onAttachedToWindow()
This is called when the view is attached to a window.
void onDetachedFromWindow()
This is called when the view is detached from a window.
boolean performClick()
Call this view's OnClickListener, if it is defined.
boolean performLongClick()
Call this view's OnLongClickListener, if it is defined.
void setDialogFactory(MediaRouteDialogFactory factory)
Sets the media route dialog factory to use when showing the route chooser or controller dialog.
void setRouteSelector(MediaRouteSelector selector)
Sets the media route selector for filtering the routes that the user can select using the media route chooser dialog.
void setVisibility(int visibility)
Set the enabled state of this view.
boolean showDialog()
Show the route chooser or controller dialog.
Protected Methods
void drawableStateChanged()
This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.
int[] onCreateDrawableState(int extraSpace)
Generate the new Drawable state for this view.
void onDraw(Canvas canvas)
Implement this to do your drawing.
void onMeasure(int widthMeasureSpec, int heightMeasureSpec)

Measure the view and its content to determine the measured width and the measured height.

boolean verifyDrawable(Drawable who)
If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying.
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Inherited Methods
From class android.view.View
From class java.lang.Object
From interface android.graphics.drawable.Drawable.Callback
From interface android.view.KeyEvent.Callback
From interface android.view.accessibility.AccessibilityEventSource

Public Constructors

public MediaRouteButton (Context context)

public MediaRouteButton (Context context, AttributeSet attrs)

public MediaRouteButton (Context context, AttributeSet attrs, int defStyleAttr)

Public Methods

public MediaRouteDialogFactory getDialogFactory ()

Gets the media route dialog factory to use when showing the route chooser or controller dialog.

Returns
  • The dialog factory, never null.

public MediaRouteSelector getRouteSelector ()

Gets the media route selector for filtering the routes that the user can select using the media route chooser dialog.

Returns
  • The selector, never null.

public void jumpDrawablesToCurrentState ()

Call Drawable.jumpToCurrentState() on all Drawable objects associated with this view.

public void onAttachedToWindow ()

This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(android.graphics.Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).

public void onDetachedFromWindow ()

This is called when the view is detached from a window. At this point it no longer has a surface for drawing.

public boolean performClick ()

Call this view's OnClickListener, if it is defined. Performs all normal actions associated with clicking: reporting accessibility event, playing a sound, etc.

Returns
  • True there was an assigned OnClickListener that was called, false otherwise is returned.

public boolean performLongClick ()

Call this view's OnLongClickListener, if it is defined. Invokes the context menu if the OnLongClickListener did not consume the event.

Returns
  • True if one of the above receivers consumed the event, false otherwise.

public void setDialogFactory (MediaRouteDialogFactory factory)

Sets the media route dialog factory to use when showing the route chooser or controller dialog.

Parameters
factory The dialog factory, must not be null.

public void setRouteSelector (MediaRouteSelector selector)

Sets the media route selector for filtering the routes that the user can select using the media route chooser dialog.

Parameters
selector The selector, must not be null.

public void setVisibility (int visibility)

Set the enabled state of this view.

Parameters
visibility One of VISIBLE, INVISIBLE, or GONE.

public boolean showDialog ()

Show the route chooser or controller dialog.

If the default route is selected or if the currently selected route does not match the selector, then shows the route chooser dialog. Otherwise, shows the route controller dialog to offer the user a choice to disconnect from the route or perform other control actions such as setting the route's volume.

The application can customize the dialogs by calling setDialogFactory(MediaRouteDialogFactory) to provide a customized dialog factory.

Returns
  • True if the dialog was actually shown.
Throws
IllegalStateException if the activity is not a subclass of FragmentActivity.

Protected Methods

protected void drawableStateChanged ()

This function is called whenever the state of the view changes in such a way that it impacts the state of drawables being shown.

Be sure to call through to the superclass when overriding this function.

protected int[] onCreateDrawableState (int extraSpace)

Generate the new Drawable state for this view. This is called by the view system when the cached Drawable state is determined to be invalid. To retrieve the current state, you should use getDrawableState().

Parameters
extraSpace if non-zero, this is the number of extra entries you would like in the returned array in which you can place your own states.
Returns
  • Returns an array holding the current Drawable state of the view.

protected void onDraw (Canvas canvas)

Implement this to do your drawing.

Parameters
canvas the canvas on which the background will be drawn

protected void onMeasure (int widthMeasureSpec, int heightMeasureSpec)

Measure the view and its content to determine the measured width and the measured height. This method is invoked by measure(int, int) and should be overriden by subclasses to provide accurate and efficient measurement of their contents.

CONTRACT: When overriding this method, you must call setMeasuredDimension(int, int) to store the measured width and height of this view. Failure to do so will trigger an IllegalStateException, thrown by measure(int, int). Calling the superclass' onMeasure(int, int) is a valid use.

The base class implementation of measure defaults to the background size, unless a larger size is allowed by the MeasureSpec. Subclasses should override onMeasure(int, int) to provide better measurements of their content.

If this method is overridden, it is the subclass's responsibility to make sure the measured height and width are at least the view's minimum height and width (getSuggestedMinimumHeight() and getSuggestedMinimumWidth()).

Parameters
widthMeasureSpec horizontal space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.
heightMeasureSpec vertical space requirements as imposed by the parent. The requirements are encoded with View.MeasureSpec.

protected boolean verifyDrawable (Drawable who)

If your view subclass is displaying its own Drawable objects, it should override this function and return true for any Drawable it is displaying. This allows animations for those drawables to be scheduled.

Be sure to call through to the super class when overriding this function.

Parameters
who The Drawable to verify. Return true if it is one you are displaying, else return the result of calling through to the super class.
Returns
  • boolean If true than the Drawable is being displayed in the view; else false and it is not allowed to animate.