How to pass Array list in intent in android?

First Activity

ArrayList<String> al = new ArrayList<String>();

    int ROWS = 2;

                        int COLS = 1;

                        String[][] a2 = new String[ROWS][COLS];

                        a2[0][0]="one";

                        a2[1][0]="two";

                        for(int i=0;i<ROWS;i++)

                        {

                            for(int j=0;j<COLS;j++)

                            {

                                al.add(a2[i][j]);

                            }

                        }

     i.putStringArrayListExtra("ar", al);

                        i.putExtra("ROWS", ROWS);

                        i.putExtra("COLS", COLS);

Second Activity

ArrayList<String> test = new ArrayList<String>();

test=getIntent().getExtras().getStringArrayList("ar");

        int ROWS=getIntent().getExtras().getInt("ROWS");

        int COLS=getIntent().getExtras().getInt("COLS");

        String[][] a2 = new String[ROWS][COLS];

        int index=0;

        for(int i=0;i<ROWS;i++)

        {

            for(int j=0;j<COLS;j++)

            {

                a2[i][j]=test.get(index++);

            }

        }