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WindowManager
public
interface
WindowManager
implements
ViewManager
| android.view.WindowManager |
The interface that apps use to talk to the window manager.
Each window manager instance is bound to a particular Display.
To obtain a WindowManager for a different display, use
Context#createDisplayContext to obtain a Context for that
display, then use Context.getSystemService(Context.WINDOW_SERVICE)
to get the WindowManager.
The simplest way to show a window on another display is to create a
Presentation. The presentation will automatically obtain a
WindowManager and Context for that display.
Summary
Nested classes | |
|---|---|
class |
WindowManager.BadTokenException
Exception that is thrown when trying to add view whose
|
class |
WindowManager.InvalidDisplayException
Exception that is thrown when calling |
class |
WindowManager.LayoutParams
|
Public methods | |
|---|---|
default
WindowMetrics
|
getCurrentWindowMetrics()
Returns the |
abstract
Display
|
getDefaultDisplay()
This method is deprecated.
Use |
default
WindowMetrics
|
getMaximumWindowMetrics()
Returns the largest |
abstract
void
|
removeViewImmediate(View view)
Special variation of |
Inherited methods | |
|---|---|
Public methods
getCurrentWindowMetrics
public WindowMetrics getCurrentWindowMetrics ()
Returns the WindowMetrics according to the current system state.
The metrics describe the size of the area the window would occupy with
LayoutParams#MATCH_PARENT width and height, and the WindowInsets
such a window would have.
The value of this is based on the current windowing state of the system.
For example, for activities in multi-window mode, the metrics returned are based on the
current bounds that the user has selected for the Activity's
task.
| Returns | |
|---|---|
WindowMetrics |
This value cannot be null. |
See also:
getDefaultDisplay
public abstract Display getDefaultDisplay ()
This method is deprecated.
Use Context#getDisplay() instead.
Returns the Display upon which this WindowManager instance
will create new windows.
Despite the name of this method, the display that is returned is not
necessarily the primary display of the system (see Display#DEFAULT_DISPLAY).
The returned display could instead be a secondary display that this
window manager instance is managing. Think of it as the display that
this WindowManager instance uses by default.
To create windows on a different display, you need to obtain a
WindowManager for that Display. (See the WindowManager
class documentation for more information.)
| Returns | |
|---|---|
Display |
The display that this window manager is managing. |
getMaximumWindowMetrics
public WindowMetrics getMaximumWindowMetrics ()
Returns the largest WindowMetrics an app may expect in the current system state.
The metrics describe the size of the largest potential area the window might occupy with
LayoutParams#MATCH_PARENT width and height, and the WindowInsets
such a window would have.
The value of this is based on the largest potential windowing state of the system.
For example, for activities in multi-window mode, the metrics returned are based on the
what the bounds would be if the user expanded the Activity's
task to cover the entire screen.
Note that this might still be smaller than the size of the physical display if certain areas
of the display are not available to windows created in this Context.
| Returns | |
|---|---|
WindowMetrics |
This value cannot be null. |
See also:
removeViewImmediate
public abstract void removeViewImmediate (View view)
Special variation of ViewManager.removeView(View) that immediately invokes
the given view hierarchy's View#onDetachedFromWindow() methods before returning. This is not
for normal applications; using it correctly requires great care.
| Parameters | |
|---|---|
view |
View: The view to be removed. |