AlertDialog
public
class
AlertDialog
extends Dialog
implements
DialogInterface
java.lang.Object | ||
↳ | android.app.Dialog | |
↳ | android.app.AlertDialog |
A subclass of Dialog that can display one, two or three buttons. If you only want to display a String in this dialog box, use the setMessage() method. If you want to display a more complex view, look up the FrameLayout called "custom" and add your view to it:
FrameLayout fl = findViewById(android.R.id.custom); fl.addView(myView, new LayoutParams(MATCH_PARENT, WRAP_CONTENT));
The AlertDialog class takes care of automatically setting
WindowManager.LayoutParams.FLAG_ALT_FOCUSABLE_IM
for you based on whether
any views in the dialog return true from View.onCheckIsTextEditor()
. Generally you want this set for a Dialog
without text editors, so that it will be placed on top of the current
input method UI. You can modify this behavior by forcing the flag to your
desired mode after calling onCreate(Bundle)
.
Developer Guides
For more information about creating dialogs, read the Dialogs developer guide.
Summary
Nested classes | |
---|---|
class |
AlertDialog.Builder
|
Constants | |
---|---|
int |
THEME_DEVICE_DEFAULT_DARK
This constant was deprecated
in API level 23.
Use |
int |
THEME_DEVICE_DEFAULT_LIGHT
This constant was deprecated
in API level 23.
Use |
int |
THEME_HOLO_DARK
This constant was deprecated
in API level 23.
Use |
int |
THEME_HOLO_LIGHT
This constant was deprecated
in API level 23.
Use |
int |
THEME_TRADITIONAL
This constant was deprecated
in API level 23.
Use |
Inherited constants |
---|
Protected constructors | |
---|---|
AlertDialog(Context context)
Creates an alert dialog that uses the default alert dialog theme. |
|
AlertDialog(Context context, boolean cancelable, DialogInterface.OnCancelListener cancelListener)
Creates an alert dialog that uses the default alert dialog theme and a custom cancel listener. |
|
AlertDialog(Context context, int themeResId)
Creates an alert dialog that uses an explicit theme resource. |
Public methods | |
---|---|
Button
|
getButton(int whichButton)
Gets one of the buttons used in the dialog. |
ListView
|
getListView()
Gets the list view used in the dialog. |
boolean
|
onKeyDown(int keyCode, KeyEvent event)
A key was pressed down. |
boolean
|
onKeyUp(int keyCode, KeyEvent event)
A key was released. |
void
|
setButton(CharSequence text, DialogInterface.OnClickListener listener)
This method was deprecated
in API level 15.
Use
|
void
|
setButton(int whichButton, CharSequence text, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the specified button of the dialog is pressed. |
void
|
setButton(CharSequence text, Message msg)
This method was deprecated
in API level 15.
Use |
void
|
setButton(int whichButton, CharSequence text, Message msg)
Set a message to be sent when a button is pressed. |
void
|
setButton2(CharSequence text, Message msg)
This method was deprecated
in API level 15.
Use |
void
|
setButton2(CharSequence text, DialogInterface.OnClickListener listener)
This method was deprecated
in API level 15.
Use
|
void
|
setButton3(CharSequence text, Message msg)
This method was deprecated
in API level 15.
Use |
void
|
setButton3(CharSequence text, DialogInterface.OnClickListener listener)
This method was deprecated
in API level 15.
Use
|
void
|
setCustomTitle(View customTitleView)
|
void
|
setIcon(Drawable icon)
|
void
|
setIcon(int resId)
Set resId to 0 if you don't want an icon. |
void
|
setIconAttribute(int attrId)
Set an icon as supplied by a theme attribute. |
void
|
setInverseBackgroundForced(boolean forceInverseBackground)
|
void
|
setMessage(CharSequence message)
|
void
|
setTitle(CharSequence title)
Set the title text for this dialog's window. |
void
|
setView(View view, int viewSpacingLeft, int viewSpacingTop, int viewSpacingRight, int viewSpacingBottom)
Set the view to display in that dialog, specifying the spacing to appear around that view. |
void
|
setView(View view)
Set the view to display in that dialog. |
Protected methods | |
---|---|
void
|
onCreate(Bundle savedInstanceState)
Similar to |
Inherited methods | |
---|---|
Constants
THEME_DEVICE_DEFAULT_DARK
public static final int THEME_DEVICE_DEFAULT_DARK
This constant was deprecated
in API level 23.
Use R.style.Theme_DeviceDefault_Dialog_Alert
.
Special theme constant for AlertDialog(android.content.Context, int)
: use
the device's default alert theme with a dark background.
Constant Value: 4 (0x00000004)
THEME_DEVICE_DEFAULT_LIGHT
public static final int THEME_DEVICE_DEFAULT_LIGHT
This constant was deprecated
in API level 23.
Use R.style.Theme_DeviceDefault_Light_Dialog_Alert
.
Special theme constant for AlertDialog(android.content.Context, int)
: use
the device's default alert theme with a light background.
Constant Value: 5 (0x00000005)
THEME_HOLO_DARK
public static final int THEME_HOLO_DARK
This constant was deprecated
in API level 23.
Use R.style.Theme_Material_Dialog_Alert
.
Special theme constant for AlertDialog(android.content.Context, int)
: use
the holographic alert theme with a dark background.
Constant Value: 2 (0x00000002)
THEME_HOLO_LIGHT
public static final int THEME_HOLO_LIGHT
This constant was deprecated
in API level 23.
Use R.style.Theme_Material_Light_Dialog_Alert
.
Special theme constant for AlertDialog(android.content.Context, int)
: use
the holographic alert theme with a light background.
Constant Value: 3 (0x00000003)
THEME_TRADITIONAL
public static final int THEME_TRADITIONAL
This constant was deprecated
in API level 23.
Use R.style.Theme_Material_Dialog_Alert
.
Special theme constant for AlertDialog(android.content.Context, int)
: use
the traditional (pre-Holo) alert dialog theme.
Constant Value: 1 (0x00000001)
Protected constructors
AlertDialog
protected AlertDialog (Context context)
Creates an alert dialog that uses the default alert dialog theme.
The default alert dialog theme is defined by
R.attr.alertDialogTheme
within the parent
context
's theme.
Parameters | |
---|---|
context |
Context : the parent context |
See also:
AlertDialog
protected AlertDialog (Context context, boolean cancelable, DialogInterface.OnCancelListener cancelListener)
Creates an alert dialog that uses the default alert dialog theme and a custom cancel listener.
This is functionally identical to:
AlertDialog dialog = new AlertDialog(context); alertDialog.setCancelable(cancelable); alertDialog.setOnCancelListener(cancelListener);
The default alert dialog theme is defined by
R.attr.alertDialogTheme
within the parent
context
's theme.
Parameters | |
---|---|
context |
Context : the parent context |
cancelable |
boolean |
cancelListener |
DialogInterface.OnCancelListener |
See also:
AlertDialog
protected AlertDialog (Context context, int themeResId)
Creates an alert dialog that uses an explicit theme resource.
The specified theme resource (themeResId
) is applied on top of
the parent context
's theme. It may be specified as a style
resource containing a fully-populated theme, such as
R.style.Theme_Material_Dialog
, to replace all attributes
in the parent context
's theme including primary and accent
colors.
To preserve attributes such as primary and accent colors, the
themeResId
may instead be specified as an overlay theme such as
R.style.ThemeOverlay_Material_Dialog
. This will override
only the window attributes necessary to style the alert window as a
dialog.
Alternatively, the themeResId
may be specified as 0
to
use the parent context
's resolved value for
R.attr.alertDialogTheme
.
Parameters | |
---|---|
context |
Context : the parent context |
themeResId |
int : the resource ID of the theme against which to inflate
this dialog, or 0 to use the parent
context 's default alert dialog theme |
See also:
Public methods
getButton
public Button getButton (int whichButton)
Gets one of the buttons used in the dialog. Returns null if the specified
button does not exist or the dialog has not yet been fully created (for
example, via Dialog.show()
or Dialog.create()
).
Parameters | |
---|---|
whichButton |
int : The identifier of the button that should be returned.
For example, this can be
DialogInterface.BUTTON_POSITIVE . |
Returns | |
---|---|
Button |
The button from the dialog, or null if a button does not exist. |
getListView
public ListView getListView ()
Gets the list view used in the dialog.
Returns | |
---|---|
ListView |
The ListView from the dialog. |
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.
Default implementation consumes KEYCODE_BACK
and, as of P
, KEYCODE_ESCAPE
to later handle them in onKeyUp(int, KeyEvent)
.
Parameters | |
---|---|
keyCode |
int : The value in event.getKeyCode(). |
event |
KeyEvent : This value cannot be null . |
Returns | |
---|---|
boolean |
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.
Default implementation consumes KEYCODE_BACK
and, as of P
, KEYCODE_ESCAPE
to close the dialog.
Parameters | |
---|---|
keyCode |
int : The value in event.getKeyCode(). |
event |
KeyEvent : This value cannot be null . |
Returns | |
---|---|
boolean |
If you handled the event, return true. If you want to allow the event to be handled by the next receiver, return false. |
setButton
public void setButton (CharSequence text, DialogInterface.OnClickListener listener)
This method was deprecated
in API level 15.
Use
setButton(int, java.lang.CharSequence, android.content.DialogInterface.OnClickListener)
with DialogInterface.BUTTON_POSITIVE
Set a listener to be invoked when button 1 of the dialog is pressed.
Parameters | |
---|---|
text |
CharSequence : The text to display in button 1. |
listener |
DialogInterface.OnClickListener : The DialogInterface.OnClickListener to use. |
setButton
public void setButton (int whichButton, CharSequence text, DialogInterface.OnClickListener listener)
Set a listener to be invoked when the specified button of the dialog is pressed.
Parameters | |
---|---|
whichButton |
int : Which button to set the listener on, can be one of
DialogInterface.BUTTON_POSITIVE ,
DialogInterface.BUTTON_NEGATIVE , or
DialogInterface.BUTTON_NEUTRAL |
text |
CharSequence : The text to display in positive button. |
listener |
DialogInterface.OnClickListener : The DialogInterface.OnClickListener to use. |
setButton
public void setButton (CharSequence text, Message msg)
This method was deprecated
in API level 15.
Use setButton(int, java.lang.CharSequence, android.os.Message)
with
DialogInterface.BUTTON_POSITIVE
.
Parameters | |
---|---|
text |
CharSequence |
msg |
Message |
setButton
public void setButton (int whichButton, CharSequence text, Message msg)
Set a message to be sent when a button is pressed.
Parameters | |
---|---|
whichButton |
int : Which button to set the message for, can be one of
DialogInterface.BUTTON_POSITIVE ,
DialogInterface.BUTTON_NEGATIVE , or
DialogInterface.BUTTON_NEUTRAL |
text |
CharSequence : The text to display in positive button. |
msg |
Message : The Message to be sent when clicked. |
setButton2
public void setButton2 (CharSequence text, Message msg)
This method was deprecated
in API level 15.
Use setButton(int, java.lang.CharSequence, android.os.Message)
with
DialogInterface.BUTTON_NEGATIVE
.
Parameters | |
---|---|
text |
CharSequence |
msg |
Message |
setButton2
public void setButton2 (CharSequence text, DialogInterface.OnClickListener listener)
This method was deprecated
in API level 15.
Use
setButton(int, java.lang.CharSequence, android.content.DialogInterface.OnClickListener)
with DialogInterface.BUTTON_NEGATIVE
Set a listener to be invoked when button 2 of the dialog is pressed.
Parameters | |
---|---|
text |
CharSequence : The text to display in button 2. |
listener |
DialogInterface.OnClickListener : The DialogInterface.OnClickListener to use. |
setButton3
public void setButton3 (CharSequence text, Message msg)
This method was deprecated
in API level 15.
Use setButton(int, java.lang.CharSequence, android.os.Message)
with
DialogInterface.BUTTON_NEUTRAL
.
Parameters | |
---|---|
text |
CharSequence |
msg |
Message |
setButton3
public void setButton3 (CharSequence text, DialogInterface.OnClickListener listener)
This method was deprecated
in API level 15.
Use
setButton(int, java.lang.CharSequence, android.content.DialogInterface.OnClickListener)
with DialogInterface.BUTTON_NEUTRAL
Set a listener to be invoked when button 3 of the dialog is pressed.
Parameters | |
---|---|
text |
CharSequence : The text to display in button 3. |
listener |
DialogInterface.OnClickListener : The DialogInterface.OnClickListener to use. |
setCustomTitle
public void setCustomTitle (View customTitleView)
Parameters | |
---|---|
customTitleView |
View |
See also:
setIcon
public void setIcon (int resId)
Set resId to 0 if you don't want an icon.
Parameters | |
---|---|
resId |
int : the resourceId of the drawable to use as the icon or 0
if you don't want an icon. |
setIconAttribute
public void setIconAttribute (int attrId)
Set an icon as supplied by a theme attribute. e.g. android.R.attr.alertDialogIcon
Parameters | |
---|---|
attrId |
int : ID of a theme attribute that points to a drawable resource. |
setInverseBackgroundForced
public void setInverseBackgroundForced (boolean forceInverseBackground)
Parameters | |
---|---|
forceInverseBackground |
boolean |
setMessage
public void setMessage (CharSequence message)
Parameters | |
---|---|
message |
CharSequence |
setTitle
public void setTitle (CharSequence title)
Set the title text for this dialog's window.
Parameters | |
---|---|
title |
CharSequence : The new text to display in the title.
This value may be null . |
setView
public void setView (View view, int viewSpacingLeft, int viewSpacingTop, int viewSpacingRight, int viewSpacingBottom)
Set the view to display in that dialog, specifying the spacing to appear around that view.
Parameters | |
---|---|
view |
View : The view to show in the content area of the dialog |
viewSpacingLeft |
int : Extra space to appear to the left of view |
viewSpacingTop |
int : Extra space to appear above view |
viewSpacingRight |
int : Extra space to appear to the right of view |
viewSpacingBottom |
int : Extra space to appear below view |
setView
public void setView (View view)
Set the view to display in that dialog.
Parameters | |
---|---|
view |
View |
Protected methods
onCreate
protected void onCreate (Bundle savedInstanceState)
Similar to Activity.onCreate
, you should initialize your dialog
in this method, including calling setContentView(View)
.
Parameters | |
---|---|
savedInstanceState |
Bundle : If this dialog is being reinitialized after a
the hosting activity was previously shut down, holds the result from
the most recent call to Dialog.onSaveInstanceState() , or null if this
is the first time. |
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Last updated 2024-12-18 UTC.