android.view
public final class
public final class
android.view.UIThreadUtilities
| java.lang.Object | ||
| android.view.UIThreadUtilities | ||
In Android, Views must be manipulated only from the UI thread. This class offers various utility methods to abide by this contract. Because different view hierarchys can run in different threads, the UI thread is unique to a specific view hierarchy only. For this reason, the methods exposed in this class must be supplied with a View whose UI thread will be used.
Summary
Public Constructors
| UIThreadUtilities() |
Public Methods
| static | boolean | isUIThread(View view) | |||
| Indicates whether the code is currently executing in the UI thread of a specified view. | |||||
| static | void | runOnUIThread(Dialog dialog, Runnable action) | |||
| Runs the specified action on the UI thread. | |||||
| static | void | runOnUIThread(View view, Runnable action) | |||
| Runs the specified action on the UI thread. | |||||
| static | void | runOnUIThread(Activity activity, Runnable action) | |||
| Runs the specified action on the UI thread. | |||||
Methods inherited
from class
java.lang.Object
Details
Public Constructors
public UIThreadUtilities()
Public Methods
public static boolean isUIThread(View view)
Indicates whether the code is currently executing in the UI thread of a
specified view.
Parameters
| view | the view whose UI thread must be checked, must be attached to a window |
|---|
Returns
- true if this method executes in the supplied view's UI thread
Throws
| IllegalArgumentException | if the specified view is not attached to a window |
|---|
public static void runOnUIThread(Dialog dialog, Runnable action)
Runs the specified action on the UI thread. If the current thread is the UI
thread, then the action is executed immediately. If the current thread is
not the UI thread, the action is posted to the event queue of the UI thread.
Parameters
| dialog | the dialog whose UI thread must be used |
|---|---|
| action | the action to run on the UI thread |
Throws
| IllegalArgumentException | if the specified dialog is not attached to a window |
|---|
See Also
public static void runOnUIThread(View view, Runnable action)
Runs the specified action on the UI thread. If the current thread is the UI
thread, then the action is executed immediately. If the current thread is
not the UI thread, the action is posted to the event queue of the UI thread.
Parameters
| view | the view whose UI thread must be used, must be attached to a window |
|---|---|
| action | the action to run on the UI thread |
Throws
| IllegalArgumentException | if the specified view is not attached to a window |
|---|
See Also
public static void runOnUIThread(Activity activity, Runnable action)
Runs the specified action on the UI thread. If the current thread is the UI
thread, then the action is executed immediately. If the current thread is
not the UI thread, the action is posted to the event queue of the UI thread.
Parameters
| activity | the activity whose UI thread must be used |
|---|---|
| action | the action to run on the UI thread |
Throws
| IllegalArgumentException | if the specified activity is not attached to a window |
|---|