Show alert with one, two or more buttons (android)

ShowAlert2Buttons

public void onClick(View view) {
  if(view == this.alertBtn){
    alertDialog = new AlertDialog.Builder(this).create();
    alertDialog.setTitle("Alert 1");
    alertDialog.setMessage("This is an alert");
    alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        return;
    } }); 
  }else if(view  == this.alert2Btn){
    alertDialog = new AlertDialog.Builder(this).create();
    alertDialog.setTitle("Alert 2");
    alertDialog.setMessage("This is another alert");
    alertDialog.setIcon(R.drawable.search);
    alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        return;
    } }); 
    alertDialog.setButton2("Cancel", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        return;
    }}); 
  }else if(view  == this.alert3Btn){
    alertDialog = new AlertDialog.Builder(this).create();
    alertDialog.setTitle("Alert 3");
    alertDialog.setMessage("This is the third alert");
    alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        return;
    } }); 
    alertDialog.setButton2("Cancel", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        return;
    }}); 
    alertDialog.setButton3("Middle", new DialogInterface.OnClickListener() {
      public void onClick(DialogInterface dialog, int which) {
        return;
    }});
  }
  alertDialog.show();
}


public static void showAlert(Context ctx, String title, String message, String btn_label)
    {
        AlertDialog alertDialog = new AlertDialog.Builder(ctx).create();
        alertDialog.setTitle(title);
        alertDialog.setMessage(message);
        alertDialog.setButton(btn_label, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                return;
            } });
        alertDialog.show();
    }

    public static void showAlert(Context ctx, int title, int message, int btn_label) {
        showAlert(ctx,ctx.getResources().getString(title),ctx.getResources().getString(message),ctx.getResources().getString(btn_label));
    }

    public static void showAlertWithTwoButton(Context ctx, int title, int msg, int yes, int no, View.OnClickListener onClickListener) {
        showAlertWithTwoButton(ctx,ctx.getString(title),ctx.getString(msg),ctx.getString(yes),ctx.getString(no),onClickListener);
    }

    private static void showAlertWithTwoButton(Context ctx, String title, String msg, String yes, String no, View.OnClickListener onClickListener) {
        AlertDialog alertDialog = new AlertDialog.Builder(ctx).create();
        alertDialog.setTitle(title);
        alertDialog.setMessage(msg);
//        alertDialog.setIcon(R.drawable.search);
        alertDialog.setButton(yes, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                if (onClickListener!=null)
                    onClickListener.onClick(null);
                    return;
            } });
        alertDialog.setButton2(no, new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int which) {
                return;
            }});
    }