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).

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Android alert dialog with One button

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.

Alert Dialog with One button

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.

Alert Dialog with two buttons


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.

Android alert dialog with three buttons