I want to show OK and cancel button in my alert dialog?

AlertDialog.Builder adb = new AlertDialog.Builder(this);
adb.setView(alertDialogView);
adb.setTitle("Title of alert dialog");
adb.setIcon(android.R.drawable.ic_dialog_alert);
adb.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        EditText et = (EditText)alertDialogView.findViewById(R.id.EditText1);
        Toast.makeText(Tutoriel18_Android.this, et.getText(),
                Toast.LENGTH_SHORT).show();
    }
});
adb.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int which) {
        finish();
    }
});
adb.show();

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();