It is the utility class contains set of utility methods to show dialogs and returns their clicks using callback methods.For more information, check out my detailed guide here : http://droidmentor.com/show_alertdialog_android/

AlertDialogHelper1.java

import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Looper;
import android.support.v7.app.AlertDialog;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;

/**
 * Created by Jaison on 05/10/16.
 */

public class AlertDialogHelper
{
    Context context;
    AlertDialog alertDialog=null;
    AlertDialogListener callBack;
    Activity current_activity;

    public AlertDialogHelper(Context context)
    {
        this.context = context;
        this.current_activity = (Activity) context;
        callBack = (AlertDialogListener) context;
    }

    /**
     * Displays the AlertDialog with 3 Action buttons
     *
     * you can set cancelable property
     *
     * @param title
     * @param message
     * @param positive
     * @param negative
     * @param neutral
     * @param from
     * @param isCancelable
     */
    public void showAlertDialog(String title,String message,String positive,String negative,String neutral,final int from,boolean isCancelable)
    {
        final AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(current_activity);

        if(!TextUtils.isEmpty(title))
            alertDialogBuilder.setTitle(title);
        if(!TextUtils.isEmpty(message))
            alertDialogBuilder.setMessage(message);

        if(!TextUtils.isEmpty(positive)) {
            alertDialogBuilder.setPositiveButton(positive,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface arg0, int arg1) {

                            callBack.onPositiveClick(from);
                            alertDialog.dismiss();
                        }
                    });
        }
        if(!TextUtils.isEmpty(neutral)) {
            alertDialogBuilder.setNeutralButton(neutral,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface arg0, int arg1) {
                            callBack.onNeutralClick(from);
                            alertDialog.dismiss();
                        }
                    });
        }
        if(!TextUtils.isEmpty(negative))
        {
            alertDialogBuilder.setNegativeButton(negative,
                    new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface arg0, int arg1) {
                            callBack.onNegativeClick(from);
                            alertDialog.dismiss();
                        }
                    });
        }
       
        alertDialogBuilder.setCancelable(isCancelable);


        alertDialog = alertDialogBuilder.create();
        alertDialog.show();
        
        if(TextUtils.isEmpty(negative))
            alertDialog.getButton(AlertDialog.BUTTON_NEGATIVE).setEnabled(false);
    }

    /**
     * Displays the AlertDialog with positive action button only
     *
     * you can set cancelable property
     *
     * @param title
     * @param message
     * @param positive
     * @param from
     * @param isCancelable
     */
    public void showAlertDialog(String title,String message,String positive,final int from,boolean isCancelable)
    {
        showAlertDialog(title,message,positive,"","",from,isCancelable);
    }

    /**
     * Displays the AlertDialog with positive action button only
     *
     * cancelable property is false (Default)
     *
     * @param title
     * @param message
     * @param positive
     * @param from
     */
    public void showAlertDialog(String title,String message,String positive,final int from)
    {
        showAlertDialog(title,message,positive,"","",from,false);
    }


    /**
     *
     * Displays the AlertDialog with positive & negative buttons
     *
     * you can set cancelable property
     *
     * @param title
     * @param message
     * @param positive
     * @param negative
     * @param from
     * @param isCancelable
     */

    public void showAlertDialog(String title,String message,String positive,String negative,final int from,boolean isCancelable)
    {
        showAlertDialog(title,message,positive,negative,"",from,isCancelable);
    }

    /**
     *
     * Displays the AlertDialog with positive & negative buttons
     *
     * cancelable property is false (Default)
     *
     * @param title
     * @param message
     * @param positive
     * @param negative
     * @param from
     */
    public void showAlertDialog(String title,String message,String positive,String negative,final int from)
    {
        showAlertDialog(title,message,positive,negative,"",from,false);
    }

    /**
     * Displays the AlertDialog with 3 Action buttons
     *
     * cancelable property is false (Default)
     *
     * @param title
     * @param message
     * @param positive
     * @param negative
     * @param neutral
     * @param from
     */
    public void showAlertDialog(String title,String message,String positive,String negative,String neutral,final int from)
    {
        showAlertDialog(title,message,positive,negative,neutral,from,false);
    }


    public interface AlertDialogListener
    {
        public void onPositiveClick(int from);
        public void onNegativeClick(int from);
        public void onNeutralClick(int from);
    }

}

AlertDialogSampleActivity.java

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

/**
 * Created by Jaison on 04/10/16.
 */

public class AlertDialogSampleActivity extends AppCompatActivity implements AlertDialogHelper.AlertDialogListener
{
    AlertDialogHelper alertDialogHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_alertdialog);

        try
        {
            // instance of the helper class

            alertDialogHelper =new AlertDialogHelper(this);

            // show AlertDialog
            
             alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard","Cancel",1,true);

         /* // 3 Action Buttons

            alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard","Later","Cancel",1,false);
            alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard","Later","Cancel",2);

            // 2 Action Buttons
            
            alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard","Cancel",1,true);
            alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard","Cancel",2);
            
            // 1 Action Button
            
            alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard",1,true);
            alertDialogHelper.showAlertDialog("Draft","Discard draft ?","Discard",2);

            // Without Title (Empty String for Title)

            alertDialogHelper.showAlertDialog("","Discard draft ?","Discard",1,true);

            // Without Message (Empty String for Message)

            alertDialogHelper.showAlertDialog("Draft","","Discard","Cancel",1,true);*/
        }
        catch(Exception e)
        {

        }

    }

    @Override
    public void onPositiveClick(int from) {
        Toast.makeText(getApplicationContext(), "Positive Click from :"+from, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onNegativeClick(int from) {
        Toast.makeText(getApplicationContext(), "Negative Click from :"+from, Toast.LENGTH_LONG).show();
    }

    @Override
    public void onNeutralClick(int from) {
        Toast.makeText(getApplicationContext(), "Neutral Click from :"+from, Toast.LENGTH_LONG).show();
    }
}

may be some improvement by implementing custom style