How to Show Alert Dialog in Android

Creating alert dialog is very easy. In this tutorial i will be discussing about creating different alert dialogues with one button(ok button), two buttons(yes or no buttons) and three buttons(yes, no and cancel buttons).

The following code will create a simple alert dialog with one button. In the following code setTitle() method is used for set Title to alert dialog. setMessage() is used for setting message to alert dialog. setIcon() is to set icon to alert dialog.

AlertDialog alertDialog = new AlertDialog.Builder(                         AlertDialogActivity.this).create();         // Setting Dialog Title         alertDialog.setTitle("Alert Dialog");         // Setting Dialog Message         alertDialog.setMessage("Welcome to AndroidHive.info");         // Setting Icon to Dialog         alertDialog.setIcon(R.drawable.tick);         // Setting OK Button         alertDialog.setButton("OK", new DialogInterface.OnClickListener() {                 public void onClick(DialogInterface dialog, int which) {                 // Write your code here to execute after dialog closed                 Toast.makeText(getApplicationContext(), "You clicked on OK", Toast.LENGTH_SHORT).show();                 }         });         // Showing Alert Message         alertDialog.show();

This output of about code will be like following image.

Android alert dialog with two button

The following code will create alert dialog with two button. setPositiveButton() is used to create a positive button in alert dialog and setNegativeButton() is used to invoke negative button to alert dialog.

AlertDialog.Builder alertDialog = new AlertDialog.Builder(AlertDialogActivity.this);         // Setting Dialog Title         alertDialog.setTitle("Confirm Delete...");         // Setting Dialog Message         alertDialog.setMessage("Are you sure you want delete this?");         // Setting Icon to Dialog         alertDialog.setIcon(R.drawable.delete);         // Setting Positive "Yes" Button         alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {             public void onClick(DialogInterface dialog,int which) {             // Write your code here to invoke YES event             Toast.makeText(getApplicationContext(), "You clicked on YES", Toast.LENGTH_SHORT).show();             }         });         // Setting Negative "NO" Button         alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {             public void onClick(DialogInterface dialog, int which) {             // Write your code here to invoke NO event             Toast.makeText(getApplicationContext(), "You clicked on NO", Toast.LENGTH_SHORT).show();             dialog.cancel();             }         });         // Showing Alert Message         alertDialog.show();

This output of about code will be like following image.

Android alert dialog with three button

Here setNeutralButton() is used to create a neutral cancel button

AlertDialog.Builder alertDialog = new AlertDialog.Builder(AlertDialogActivity.this);                 // Setting Dialog Title                 alertDialog.setTitle("Save File...");                 // Setting Dialog Message                 alertDialog.setMessage("Do you want to save this file?");                 // Setting Icon to Dialog                 alertDialog.setIcon(R.drawable.save);                 // Setting Positive "Yes" Button                 alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {                     public void onClick(DialogInterface dialog, int which) {                     // User pressed YES button. Write Logic Here                     Toast.makeText(getApplicationContext(), "You clicked on YES",                                         Toast.LENGTH_SHORT).show();                     }                 });                 // Setting Negative "NO" Button                 alertDialog.setNegativeButton("NO", new DialogInterface.OnClickListener() {                     public void onClick(DialogInterface dialog, int which) {                     // User pressed No button. Write Logic Here                     Toast.makeText(getApplicationContext(), "You clicked on NO", Toast.LENGTH_SHORT).show();                     }                 });                 // Setting Netural "Cancel" Button                 alertDialog.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {                     public void onClick(DialogInterface dialog, int which) {                     // User pressed Cancel button. Write Logic Here                     Toast.makeText(getApplicationContext(), "You clicked on Cancel",                                         Toast.LENGTH_SHORT).show();                     }                 });                 // Showing Alert Message                 alertDialog.show();

This output of about code will be like following image.