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Android Reference

Dialog


android.app

Class Dialog

    • Field Detail

      • mCancelable

        protected boolean mCancelable
        This field should be made private, so it is hidden from the SDK.
    • Constructor Detail

      • Dialog

        public Dialog(Context context)
        Create a Dialog window that uses the default dialog frame style.
        Parameters:
        context - The Context the Dialog is to run it. In particular, it uses the window manager and theme in this context to present its UI.
      • Dialog

        public Dialog(Context context,
              int theme)
        Create a Dialog window that uses a custom dialog style.
        Parameters:
        context - The Context in which the Dialog should run. In particular, it uses the window manager and theme from this context to present its UI.
        theme - A style resource describing the theme to use for the window. See Style and Theme Resources for more information about defining and using styles. This theme is applied on top of the current theme in context. If 0, the default dialog theme will be used.
    • Method Detail

      • getContext

        public final Context getContext()
        Retrieve the Context this Dialog is running in.
        Returns:
        Context The Context used by the Dialog.
      • getActionBar

        public ActionBar getActionBar()
        Retrieve the ActionBar attached to this dialog, if present.
        Returns:
        The ActionBar attached to the dialog or null if no ActionBar is present.
      • setOwnerActivity

        public final void setOwnerActivity(Activity activity)
        Sets the Activity that owns this dialog. An example use: This Dialog will use the suggested volume control stream of the Activity.
        Parameters:
        activity - The Activity that owns this dialog.
      • getOwnerActivity

        public final Activity getOwnerActivity()
        Returns the Activity that owns this Dialog. For example, if Activity.showDialog(int) is used to show this Dialog, that Activity will be the owner (by default). Depending on how this dialog was created, this may return null.
        Returns:
        The Activity that owns this Dialog.
      • isShowing

        public boolean isShowing()
        Returns:
        Whether the dialog is currently showing.
      • show

        public void show()
        Start the dialog and display it on screen. The window is placed in the application layer and opaque. Note that you should not override this method to do initialization when the dialog is shown, instead implement that in onStart().
      • hide

        public void hide()
        Hide the dialog, but do not dismiss it.
      • dismiss

        public void dismiss()
        Dismiss this dialog, removing it from the screen. This method can be invoked safely from any thread. Note that you should not override this method to do cleanup when the dialog is dismissed, instead implement that in onStop().
        Specified by:
        dismiss in interface DialogInterface
      • onCreate

        protected void onCreate(Bundle savedInstanceState)
        Similar to Activity.onCreate(android.os.Bundle), you should initialize your dialog in this method, including calling setContentView(int).
        Parameters:
        savedInstanceState - If this dialog is being reinitalized after a the hosting activity was previously shut down, holds the result from the most recent call to onSaveInstanceState(), or null if this is the first time.
      • onStart

        protected void onStart()
        Called when the dialog is starting.
      • onStop

        protected void onStop()
        Called to tell you that you're stopping.
      • onSaveInstanceState

        public Bundle onSaveInstanceState()
        Saves the state of the dialog into a bundle. The default implementation saves the state of its view hierarchy, so you'll likely want to call through to super if you override this to save additional state.
        Returns:
        A bundle with the state of the dialog.
      • onRestoreInstanceState

        public void onRestoreInstanceState(Bundle savedInstanceState)
        Restore the state of the dialog from a previously saved bundle. The default implementation restores the state of the dialog's view hierarchy that was saved in the default implementation of onSaveInstanceState(), so be sure to call through to super when overriding unless you want to do all restoring of state yourself.
        Parameters:
        savedInstanceState - The state of the dialog previously saved by onSaveInstanceState().
      • getWindow

        public Window getWindow()
        Retrieve the current Window for the activity. This can be used to directly access parts of the Window API that are not available through Activity/Screen.
        Returns:
        Window The current window, or null if the activity is not visual.
      • findViewById

        public View findViewById(int id)
        Finds a view that was identified by the id attribute from the XML that was processed in onStart().
        Parameters:
        id - the identifier of the view to find
        Returns:
        The view if found or null otherwise.
      • setContentView

        public void setContentView(int layoutResID)
        Set the screen content from a layout resource. The resource will be inflated, adding all top-level views to the screen.
        Parameters:
        layoutResID - Resource ID to be inflated.
      • setContentView

        public void setContentView(View view)
        Set the screen content to an explicit view. This view is placed directly into the screen's view hierarchy. It can itself be a complex view hierarhcy.
        Parameters:
        view - The desired content to display.
      • setContentView

        public void setContentView(View view,
                          ViewGroup.LayoutParams params)
        Set the screen content to an explicit view. This view is placed directly into the screen's view hierarchy. It can itself be a complex view hierarhcy.
        Parameters:
        view - The desired content to display.
        params - Layout parameters for the view.
      • addContentView

        public void addContentView(View view,
                          ViewGroup.LayoutParams params)
        Add an additional content view to the screen. Added after any existing ones in the screen -- existing views are NOT removed.
        Parameters:
        view - The desired content to display.
        params - Layout parameters for the view.
      • setTitle

        public void setTitle(CharSequence title)
        Set the title text for this dialog's window.
        Parameters:
        title - The new text to display in the title.
      • setTitle

        public void setTitle(int titleId)
        Set the title text for this dialog's window. The text is retrieved from the resources with the supplied identifier.
        Parameters:
        titleId - the title's text resource identifier
      • onKeyDown

        public boolean onKeyDown(int keyCode,
                        KeyEvent event)
        A key was pressed down.

        If the focused view didn't want this event, this method is called.

        The default implementation consumed the KEYCODE_BACK to later handle it in onKeyUp(int, android.view.KeyEvent).

        Specified by:
        onKeyDown in interface KeyEvent.Callback
        Parameters:
        keyCode - The value in event.getKeyCode().
        event - Description of the key event.
        Returns:
        If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.
        See Also:
        onKeyUp(int, android.view.KeyEvent), KeyEvent
      • onKeyLongPress

        public boolean onKeyLongPress(int keyCode,
                             KeyEvent event)
        Default implementation of KeyEvent.Callback.onKeyLongPress(): always returns false (doesn't handle the event).
        Specified by:
        onKeyLongPress in interface KeyEvent.Callback
        Parameters:
        keyCode - The value in event.getKeyCode().
        event - Description of the key event.
        Returns:
        If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.
      • onKeyUp

        public boolean onKeyUp(int keyCode,
                      KeyEvent event)
        A key was released.

        The default implementation handles KEYCODE_BACK to close the dialog.

        Specified by:
        onKeyUp in interface KeyEvent.Callback
        Parameters:
        keyCode - The value in event.getKeyCode().
        event - Description of the key event.
        Returns:
        If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.
        See Also:
        onKeyDown(int, android.view.KeyEvent), KeyEvent
      • onKeyMultiple

        public boolean onKeyMultiple(int keyCode,
                            int repeatCount,
                            KeyEvent event)
        Default implementation of KeyEvent.Callback.onKeyMultiple(): always returns false (doesn't handle the event).
        Specified by:
        onKeyMultiple in interface KeyEvent.Callback
        Parameters:
        keyCode - The value in event.getKeyCode().
        repeatCount - Number of pairs as returned by event.getRepeatCount().
        event - Description of the key event.
        Returns:
        If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false.
      • onBackPressed

        public void onBackPressed()
        Called when the dialog has detected the user's press of the back key. The default implementation simply cancels the dialog (only if it is cancelable), but you can override this to do whatever you want.
      • onKeyShortcut

        public boolean onKeyShortcut(int keyCode,
                            KeyEvent event)
        Called when a key shortcut event is not handled by any of the views in the Dialog. Override this method to implement global key shortcuts for the Dialog. Key shortcuts can also be implemented by setting the shortcut property of menu items.
        Parameters:
        keyCode - The value in event.getKeyCode().
        event - Description of the key event.
        Returns:
        True if the key shortcut was handled.
      • onTouchEvent

        public boolean onTouchEvent(MotionEvent event)
        Called when a touch screen event was not handled by any of the views under it. This is most useful to process touch events that happen outside of your window bounds, where there is no view to receive it.
        Parameters:
        event - The touch screen event being processed.
        Returns:
        Return true if you have consumed the event, false if you haven't. The default implementation will cancel the dialog when a touch happens outside of the window bounds.
      • onTrackballEvent

        public boolean onTrackballEvent(MotionEvent event)
        Called when the trackball was moved and not handled by any of the views inside of the activity. So, for example, if the trackball moves while focus is on a button, you will receive a call here because buttons do not normally do anything with trackball events. The call here happens before trackball movements are converted to DPAD key events, which then get sent back to the view hierarchy, and will be processed at the point for things like focus navigation.
        Parameters:
        event - The trackball event being processed.
        Returns:
        Return true if you have consumed the event, false if you haven't. The default implementation always returns false.
      • onGenericMotionEvent

        public boolean onGenericMotionEvent(MotionEvent event)
        Called when a generic motion event was not handled by any of the views inside of the dialog.

        Generic motion events describe joystick movements, mouse hovers, track pad touches, scroll wheel movements and other input events. The source of the motion event specifies the class of input that was received. Implementations of this method must examine the bits in the source before processing the event. The following code example shows how this is done.

        Generic motion events with source class InputDevice.SOURCE_CLASS_POINTER are delivered to the view under the pointer. All other generic motion events are delivered to the focused view.

        See View.onGenericMotionEvent(MotionEvent) for an example of how to handle this event.

        Parameters:
        event - The generic motion event being processed.
        Returns:
        Return true if you have consumed the event, false if you haven't. The default implementation always returns false.
      • dispatchKeyEvent

        public boolean dispatchKeyEvent(KeyEvent event)
        Called to process key events. You can override this to intercept all key events before they are dispatched to the window. Be sure to call this implementation for key events that should be handled normally.
        Specified by:
        dispatchKeyEvent in interface Window.Callback
        Parameters:
        event - The key event.
        Returns:
        boolean Return true if this event was consumed.
      • dispatchKeyShortcutEvent

        public boolean dispatchKeyShortcutEvent(KeyEvent event)
        Called to process a key shortcut event. You can override this to intercept all key shortcut events before they are dispatched to the window. Be sure to call this implementation for key shortcut events that should be handled normally.
        Specified by:
        dispatchKeyShortcutEvent in interface Window.Callback
        Parameters:
        event - The key shortcut event.
        Returns:
        True if this event was consumed.
      • dispatchTouchEvent

        public boolean dispatchTouchEvent(MotionEvent ev)
        Called to process touch screen events. You can override this to intercept all touch screen events before they are dispatched to the window. Be sure to call this implementation for touch screen events that should be handled normally.
        Specified by:
        dispatchTouchEvent in interface Window.Callback
        Parameters:
        ev - The touch screen event.
        Returns:
        boolean Return true if this event was consumed.
      • dispatchTrackballEvent

        public boolean dispatchTrackballEvent(MotionEvent ev)
        Called to process trackball events. You can override this to intercept all trackball events before they are dispatched to the window. Be sure to call this implementation for trackball events that should be handled normally.
        Specified by:
        dispatchTrackballEvent in interface Window.Callback
        Parameters:
        ev - The trackball event.
        Returns:
        boolean Return true if this event was consumed.
      • dispatchGenericMotionEvent

        public boolean dispatchGenericMotionEvent(MotionEvent ev)
        Called to process generic motion events. You can override this to intercept all generic motion events before they are dispatched to the window. Be sure to call this implementation for generic motion events that should be handled normally.
        Specified by:
        dispatchGenericMotionEvent in interface Window.Callback
        Parameters:
        ev - The generic motion event.
        Returns:
        boolean Return true if this event was consumed.
      • onCreatePanelView

        public View onCreatePanelView(int featureId)
        Description copied from interface: Window.Callback
        Instantiate the view to display in the panel for 'featureId'. You can return null, in which case the default content (typically a menu) will be created for you.
        Specified by:
        onCreatePanelView in interface Window.Callback
        Parameters:
        featureId - Which panel is being created.
        Returns:
        view The top-level view to place in the panel.
        See Also:
        Activity.onCreatePanelView(int)
      • onCreatePanelMenu

        public boolean onCreatePanelMenu(int featureId,
                                Menu menu)
        Description copied from interface: Window.Callback
        Initialize the contents of the menu for panel 'featureId'. This is called if onCreatePanelView() returns null, giving you a standard menu in which you can place your items. It is only called once for the panel, the first time it is shown.

        You can safely hold on to menu (and any items created from it), making modifications to it as desired, until the next time onCreatePanelMenu() is called for this feature.

        Specified by:
        onCreatePanelMenu in interface Window.Callback
        Parameters:
        featureId - The panel being created.
        menu - The menu inside the panel.
        Returns:
        boolean You must return true for the panel to be displayed; if you return false it will not be shown.
        See Also:
        Activity.onCreatePanelMenu(int, Menu)
      • onPreparePanel

        public boolean onPreparePanel(int featureId,
                             View view,
                             Menu menu)
        Description copied from interface: Window.Callback
        Prepare a panel to be displayed. This is called right before the panel window is shown, every time it is shown.
        Specified by:
        onPreparePanel in interface Window.Callback
        Parameters:
        featureId - The panel that is being displayed.
        view - The View that was returned by onCreatePanelView().
        menu - If onCreatePanelView() returned null, this is the Menu being displayed in the panel.
        Returns:
        boolean You must return true for the panel to be displayed; if you return false it will not be shown.
        See Also:
        Activity.onPreparePanel(int, View, Menu)
      • onMenuOpened

        public boolean onMenuOpened(int featureId,
                           Menu menu)
        Description copied from interface: Window.Callback
        Called when a panel's menu is opened by the user. This may also be called when the menu is changing from one type to another (for example, from the icon menu to the expanded menu).
        Specified by:
        onMenuOpened in interface Window.Callback
        Parameters:
        featureId - The panel that the menu is in.
        menu - The menu that is opened.
        Returns:
        Return true to allow the menu to open, or false to prevent the menu from opening.
        See Also:
        Activity.onMenuOpened(int, Menu)
      • onMenuItemSelected

        public boolean onMenuItemSelected(int featureId,
                                 MenuItem item)
        Description copied from interface: Window.Callback
        Called when a panel's menu item has been selected by the user.
        Specified by:
        onMenuItemSelected in interface Window.Callback
        Parameters:
        featureId - The panel that the menu is in.
        item - The menu item that was selected.
        Returns:
        boolean Return true to finish processing of selection, or false to perform the normal menu handling (calling its Runnable or sending a Message to its target Handler).
        See Also:
        Activity.onMenuItemSelected(int, MenuItem)
      • onPanelClosed

        public void onPanelClosed(int featureId,
                         Menu menu)
        Description copied from interface: Window.Callback
        Called when a panel is being closed. If another logical subsequent panel is being opened (and this panel is being closed to make room for the subsequent panel), this method will NOT be called.
        Specified by:
        onPanelClosed in interface Window.Callback
        Parameters:
        featureId - The panel that is being displayed.
        menu - If onCreatePanelView() returned null, this is the Menu being displayed in the panel.
        See Also:
        Activity.onPanelClosed(int, Menu)
      • onCreateContextMenu

        public void onCreateContextMenu(ContextMenu menu,
                               View v,
                               ContextMenu.ContextMenuInfo menuInfo)
        Description copied from interface: View.OnCreateContextMenuListener
        Called when the context menu for this view is being built. It is not safe to hold onto the menu after this method returns.
        Specified by:
        onCreateContextMenu in interface View.OnCreateContextMenuListener
        Parameters:
        menu - The context menu that is being built
        v - The view for which the context menu is being built
        menuInfo - Extra information about the item for which the context menu should be shown. This information will vary depending on the class of v.
        See Also:
        Activity#onCreateContextMenu(ContextMenu, View, ContextMenuInfo)
      • onWindowStartingActionMode

        public ActionMode onWindowStartingActionMode(ActionMode.Callback callback)
        Description copied from interface: Window.Callback
        Called when an action mode is being started for this window. Gives the callback an opportunity to handle the action mode in its own unique and beautiful way. If this method returns null the system can choose a way to present the mode or choose not to start the mode at all.
        Specified by:
        onWindowStartingActionMode in interface Window.Callback
        Parameters:
        callback - Callback to control the lifecycle of this action mode
        Returns:
        The ActionMode that was started, or null if the system should present it
      • onActionModeStarted

        public void onActionModeStarted(ActionMode mode)
        Called when an action mode has been started. The appropriate mode callback method will have already been invoked. Note that if you override this method you should always call through to the superclass implementation by calling super.onActionModeStarted(mode).
        Specified by:
        onActionModeStarted in interface Window.Callback
        Parameters:
        mode - The new mode that has just been started.
      • onActionModeFinished

        public void onActionModeFinished(ActionMode mode)
        Called when an action mode has been finished. The appropriate mode callback method will have already been invoked. Note that if you override this method you should always call through to the superclass implementation by calling super.onActionModeFinished(mode).
        Specified by:
        onActionModeFinished in interface Window.Callback
        Parameters:
        mode - The mode that was just finished.
      • takeKeyEvents

        public void takeKeyEvents(boolean get)
        Request that key events come to this dialog. Use this if your dialog has no views with focus, but the dialog still wants a chance to process key events.
        Parameters:
        get - true if the dialog should receive key events, false otherwise
        See Also:
        Window.takeKeyEvents(boolean)
      • requestWindowFeature

        public final boolean requestWindowFeature(int featureId)
        Enable extended window features. This is a convenience for calling getWindow().requestFeature().
        Parameters:
        featureId - The desired feature as defined in Window.
        Returns:
        Returns true if the requested feature is supported and now enabled.
        See Also:
        Window.requestFeature(int)
      • setCancelable

        public void setCancelable(boolean flag)
        Sets whether this dialog is cancelable with the BACK key.
      • setCanceledOnTouchOutside

        public void setCanceledOnTouchOutside(boolean cancel)
        Sets whether this dialog is canceled when touched outside the window's bounds. If setting to true, the dialog is set to be cancelable if not already set.
        Parameters:
        cancel - Whether the dialog should be canceled when touched outside the window.
      • cancel

        public void cancel()
        Cancel the dialog. This is essentially the same as calling dismiss(), but it will also call your DialogInterface.OnCancelListener (if registered).
        Specified by:
        cancel in interface DialogInterface
      • setOnDismissListener

        public void setOnDismissListener(DialogInterface.OnDismissListener listener)
        Set a listener to be invoked when the dialog is dismissed.
        Parameters:
        listener - The DialogInterface.OnDismissListener to use.
      • setOnShowListener

        public void setOnShowListener(DialogInterface.OnShowListener listener)
        Sets a listener to be invoked when the dialog is shown.
        Parameters:
        listener - The DialogInterface.OnShowListener to use.
      • setDismissMessage

        public void setDismissMessage(Message msg)
        Set a message to be sent when the dialog is dismissed.
        Parameters:
        msg - The msg to send when the dialog is dismissed.
      • setOnKeyListener

        public void setOnKeyListener(DialogInterface.OnKeyListener onKeyListener)
        Sets the callback that will be called if a key is dispatched to the dialog.


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