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Alert Dialog

pipiem555

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2 MONTHS
2 2 MONTHS OF SERVICE
LEVEL 1 200 XP
Operating System

Android

We create an AlertDialog by using its Builder class, whose methods all return an instance of Builder.

AN ALERT WITH ONE BUTTON

  1. AlertDialog alertDialog =

    new

    AlertDialog.Builder

    (

    Dialog

    .this

    )

    .create

    (

    )

    ;

We set the alert dialog title
  1. alertDialog.setTitle

    (

    "Alert Dialog"

    )

    ;

We set the alertDialog message
  1. alertDialog.setMessage

    (

    "Welcome to Android"

    )

    ;

We set the alert dialog Icon
  1. alertDialog.setIcon

    (

    R.drawable

    .tick

    )

    ;

Finally we create OK button and set onClick listener to the button
  1. alertDialog.setButton

    (

    "OK"

    , new

    DialogInterface.OnClickListener

    (

    )
  2. {

  4. public

    void

    onClick(

    DialogInterface dialog, int

    which)
  5. {

  7. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on OK"

    ,
  8. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  9. }

    )

    ;

We show the dialog.
  1. alertDialog.show

    (

    )

    ;

AN ALERT WITH TWO BUTTONS

You can create three types of buttons:-
1.setPositiveButton
Describes an intended action or a confirmation, e.g. “Save” or “Yes”
2.setNeutralButton
Describes a “neutral” action such as “Close”.
3.setNegativeButton
Describes a cancellation or simply a “No”.

  1. AlertDialog.Builder

    alertDialog =

    new

    AlertDialog.Builder

    (

    Dialog

    .this

    )

    ;
  2. alertDialog.setTitle

    (

    "Confirm Delete..."

    )

    ;
  3. alertDialog.setMessage

    (

    "Are you sure you want delete this?"

    )

    ;
  4. alertDialog.setIcon

    (

    R.drawable

    .delete

    )

    ;

We create the Yes button and set the onClick listener

  1. alertDialog.setPositiveButton

    (

    "YES"

    ,new

    DialogInterface.OnClickListener

    (

    )
  2. {
  3. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  4. {
  5. Toast.makeText

    (

    getApplicationContext(

    )

    , "You clicked on YES"

    ,
  6. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  7. }

    )

    ;

  9. We create the Yes button and set the onClick listener

  11. alertDialog.setNegativeButton

    (

    "NO"

    ,new

    DialogInterface.OnClickListener

    (

    )
  12. {
  13. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  14. {

  16. Toast.makeText

    (

    getApplicationContext(

    )

    , "You clicked on NO"

    ,
  17. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  18. dialog.cancel

    (

    )

    ;
  19. }
  20. }

    )

    ;
  21. alertDialog.show

    (

    )

    ;

AN ALERT WITH THREE BUTTONS

  1. btnAlertThreeBtns.setOnClickListener

    (

    new

    View

    .OnClickListener

    (

    )
  2. {

  4. public

    void

    onClick(

    View

     arg0)
  5. {

  7. AlertDialog.Builder

    alertDialog =

    new

    AlertDialog.Builder

    (

    Dialog

    .this

    )

    ;
  8. alertDialog.setTitle

    (

    "Save File..."

    )

    ;

  10. alertDialog.setMessage

    (

    "Do you want to save this file?"

    )

    ;
  11. // Setting Icon to Dialog
  12. alertDialog.setIcon

    (

    R.drawable

    .save

    )

    ;

  14. //Here we set the Yes setPositiveButton
  15. alertDialog.setPositiveButton

    (

    "YES"

    ,new

    DialogInterface.OnClickListener

    (

    )
  16. {

  18. public

    void

    onClick(

    DialogInterface dialog, int

    which)
  19. {
  20. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on YES"

    ,
  21. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  22. }
  23. }

    )

    ;

  25. // Setting setNegativeButton No
  26. alertDialog.setNeutralButton

    (

    "NO"

    ,new

    DialogInterface.OnClickListener

    (

    )
  27. {

  29. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  30. {
  31. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on NO"

    ,
  32. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  33. }
  34. }

    )

    ;
  35. alertDialog.setNegativeButton

    (

    "Cancel"

    ,new

    DialogInterface.OnClickListener

    (

    )
  36. {

  38. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  39. {
  40. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on
  41. Cancel"

    ,Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  42. }
  43. }

    )

    ;
  44. alertDialog.show

    (

    )

    ;

Here is the complete source code for the above tutorial
Main.xml file

  1. <?

    xml version=

    "1.0"

    encoding=

    "utf-8"

    ?>
  2. <

    LinearLayout xmlns:

    android=

    "http://schemas.android.com/apk/res/android"
  3. android:

    orientation=

    "vertical"
  4. android:

    layout_width=

    "fill_parent"
  5. android:

    layout_height=

    "fill_parent"
  6. android:

    background=

    "#ffffff"
  7. >

  9. <

    Button


  10. android:

    id=

    "@+id/btnAlert"
  11. android:

    layout_width=

    "match_parent"
  12. android:

    layout_height=

    "wrap_content"
  13. android:

    text=

    "Show Alert"
  14. android:

    layout_marginRight=

    "40dp"
  15. android:

    layout_marginLeft=

    "40dp"

    >
  16. </

    Button>

  18. <

    Button


  19. android:

    id=

    "@+id/btnAlertWithTwoBtns"
  20. android:

    layout_width=

    "match_parent"
  21. android:

    layout_height=

    "wrap_content"
  22. android:

    text=

    "Show Alert With Two Buttons"
  23. android:

    layout_marginRight=

    "40dp"
  24. android:

    layout_marginLeft=

    "40dp"
  25. >
  26. </

    Button>

  28. <

    Button


  29. android:

    id=

    "@+id/btnAlertWithThreeBtns"
  30. android:

    layout_width=

    "match_parent"
  31. android:

    layout_height=

    "wrap_content"
  32. android:

    text=

    "Show Alert with Three Buttons"
  33. android:

    layout_marginRight=

    "40dp"
  34. android:

    layout_marginLeft=

    "40dp"
  35. >
  36. </

    Button>
  37. </

    LinearLayout>

Dialog.java

  1. package

    com.dialog

    ;
  2. import

    android.app.Activity

    ;
  3. import

    android.app.AlertDialog

    ;
  4. import

    android.content.DialogInterface

    ;
  5. import

    android.os.Bundle

    ;
  6. import

    android.view.View

    ;
  7. import

    android.widget.Button

    ;
  8. import

    android.widget.Toast

    ;

  10. public

    class

    Dialog

     extends

    Activity
  11. {
  12. @Override
  13. public

    void

    onCreate(

    Bundle savedInstanceState)
  14. {
  15. super

    .onCreate

    (

    savedInstanceState)

    ;
  16. setContentView(

    R.layout

    .main

    )

    ;

  18. Button

     btnAlert =

    (

    Button

    )

    findViewById(

    R.id

    .btnAlert

    )

    ;
  19. Button

     btnAlertTwoBtns =

    (

    Button

    )

    findViewById(

    R.id

    .btnAlertWithTwoBtns

    )

    ;
  20. Button

     btnAlertThreeBtns =

    (

    Button

    )

    findViewById(

    R.id

    .btnAlertWithThreeBtns

    )

    ;

  22. btnAlert.setOnClickListener

    (

    new

    View

    .OnClickListener

    (

    )
  23. {

  25. public

    void

    onClick(

    View

     arg0)
  26. {
  27. // Creating alert Dialog with one Button

  29. AlertDialog alertDialog =

    new
  30. AlertDialog.Builder

    (

    Dialog

    .this

    )

    .create

    (

    )

    ;

  32. // Setting Dialog Title
  33. alertDialog.setTitle

    (

    "Alert Dialog"

    )

    ;

  35. // Setting Dialog Message
  36. alertDialog.setMessage

    (

    "Welcome to Android"

    )

    ;

  38. // Setting Icon to Dialog
  39. alertDialog.setIcon

    (

    R.drawable

    .tick

    )

    ;

  41. // Setting OK Button
  42. alertDialog.setButton

    (

    "OK"

    , new
  43. DialogInterface.OnClickListener

    (

    )
  44. {

  46. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  47. {

  49. // Write your code here to execute after dialog closed
  50. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on OK"

    ,
  51. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  52. }
  53. }

    )

    ;

  55. // Showing Alert Message
  56. alertDialog.show

    (

    )

    ;

  58. }
  59. }

    )

    ;

  61. btnAlertTwoBtns.setOnClickListener

    (

    new

    View

    .OnClickListener

    (

    )
  62. {

  64. public

    void

    onClick(

    View

     arg0)
  65. {
  66. // Creating alert Dialog with two Buttons

  68. AlertDialog.Builder

    alertDialog =

    new
  69. AlertDialog.Builder

    (

    Dialog

    .this

    )

    ;

  71. // Setting Dialog Title
  72. alertDialog.setTitle

    (

    "Confirm Delete..."

    )

    ;

  74. // Setting Dialog Message
  75. alertDialog.setMessage

    (

    "Are you sure you want
  76. delete this?"

    )

    ;

  78. // Setting Icon to Dialog
  79. alertDialog.setIcon

    (

    R.drawable

    .delete

    )

    ;

  81. // Setting Positive "Yes" Button
  82. alertDialog.setPositiveButton

    (

    "YES"

    ,new
  83. DialogInterface.OnClickListener

    (

    )
  84. {
  85. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  86. {
  87. // Write your code here to execute after dialog
  88. Toast.makeText

    (

    getApplicationContext(

    )

    , "You clicked on YES"

    ,
  89. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  90. }
  91. }

    )

    ;
  92. // Setting Negative "NO" Button
  93. alertDialog.setNegativeButton

    (

    "NO"

    , new

    DialogInterface.OnClickListener

    (

    )
  94. {

  96. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  97. {
  98. // Write your code here to execute after dialog
  99. Toast.makeText

    (

    getApplicationContext(

    )

    , "You clicked on NO"

    ,

  101. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  102. dialog.cancel

    (

    )

    ;
  103. }
  104. }

    )

    ;
  105. // Showing Alert Message
  106. alertDialog.show

    (

    )

    ;

  108. }
  109. }

    )

    ;






  116. btnAlertThreeBtns.setOnClickListener

    (

    new

    View

    .OnClickListener

    (

    )
  117. {

  119. public

    void

    onClick(

    View

     arg0)
  120. {
  121. // Creating alert Dialog with three Buttons

  123. AlertDialog.Builder

    alertDialog =

    new

    AlertDialog.Builder

    (

    Dialog

    .this

    )

    ;
  124. // Setting Dialog Title
  125. alertDialog.setTitle

    (

    "Save File..."

    )

    ;
  126. // Setting Dialog Message
  127. alertDialog.setMessage

    (

    "Do you want to save this file?"

    )

    ;
  128. // Setting Icon to Dialog
  129. alertDialog.setIcon

    (

    R.drawable

    .save

    )

    ;
  130. // Setting Positive Yes Button
  131. alertDialog.setPositiveButton

    (

    "YES"

    ,new

    DialogInterface.OnClickListener

    (

    )
  132. {

  134. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  135. {
  136. // User pressed Cancel button. Write Logic Here Toast.makeText(getApplicationContext(),"You clicked on YES", Toast.LENGTH_SHORT).show();
  137. }
  138. }

    )

    ;
  139. // Setting Positive Yes Button
  140. alertDialog.setNeutralButton

    (

    "NO"

    ,new
  141. DialogInterface.OnClickListener

    (

    )
  142. {

  144. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  145. {
  146. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on NO"

    ,
  147. Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  148. }
  149. }

    )

    ;
  150. // Setting Positive "Cancel" Button
  151. alertDialog.setNegativeButton

    (

    "Cancel"

    ,new

    DialogInterface.OnClickListener

    (

    )
  152. {

  154. public

    void

    onClick(

    DialogInterface dialog,int

    which)
  155. {
  156. Toast.makeText

    (

    getApplicationContext(

    )

    ,"You clicked on

  158. Cancel"

    ,Toast.LENGTH_SHORT

    )

    .show

    (

    )

    ;
  159. }
  160. }

    )

    ;

  162. alertDialog.show

    (

    )

    ;

  164. }
  165. }

    )

    ;
  166. }
  167. }

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