How to check multiple checkboxes in a table layout in android

I am having a table layout with eleven rows and five columns on the fifth column i had placed the checkboxes.Each row containing one check box now i want to select all the check box at once by clicking "SELECT ALL" in context menu This is what i had done but wont work for me please help me with this:

public class ckt extends Fragment {

    public int []check_box_count = new int[12];
    public int [] Table_Row_Count = new int[12];
    TableRow table_row;
    TableLayout table;
    CheckBox check_box,check_box_2;
    int i,j;
    TextView tv;
    View Root_view;
    int [] Checked_Count= new int[12];
    String[][] str;
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {



         Root_view = inflater.inflate(R.layout.manualmode_ac_fuse_ckt, null);

        table = (TableLayout)Root_view.findViewById(R.id.table_layout_manual_mode);


        Table_Row_Count[0] = R.id.tableRow1_manual;
        Table_Row_Count[1] = R.id.tableRow2_manual;
        Table_Row_Count[2] = R.id.tableRow3_manual;
        Table_Row_Count[3] = R.id.tableRow4_manual;
        Table_Row_Count[4] = R.id.tableRow5_manual;
        Table_Row_Count[5] = R.id.tableRow6_manual;
        Table_Row_Count[6] = R.id.tableRow7_manual;
        Table_Row_Count[7] = R.id.tableRow8_manual;
        Table_Row_Count[8] = R.id.tableRow9_manual;
        Table_Row_Count[9] = R.id.tableRow10_manual;
        Table_Row_Count[10] = R.id.tableRow11_manual;
        Table_Row_Count[11] = R.id.Table_Row_12;

    //  table_row = (TableRow)Root_view.findViewById(Table_Row_Count[i]);

        check_box_count[0] = R.id.cb_1;
        check_box_count[1] = R.id.cb_2;
        check_box_count[2] = R.id.cb_3;
        check_box_count[3] = R.id.cb_4;
        check_box_count[4] = R.id.cb_5;
        check_box_count[5] = R.id.cb_6;
        check_box_count[6] = R.id.cb_7;
        check_box_count[7] = R.id.cb_8;
        check_box_count[8] = R.id.cb_9;
        check_box_count[9] = R.id.cb_10;
        check_box_count[10] = R.id.cb_11;
        check_box_count[11] = R.id.cb_12;
    //  check_box = (CheckBox)Root_view.findViewById(check_box_count[i]);
        registerForContextMenu(table);
        return Root_view;


    }
    @Override
    public void onCreateContextMenu(ContextMenu menu, View v,
            ContextMenuInfo menuInfo) {
        menu.setHeaderTitle("MANUAL MODE : AFTER FUSE CONNECTION");
        menu.add(0, v.getId(), 0, "TEST");
        menu.add(0, v.getId(), 0, "SELECT ALL");
        menu.add(0, v.getId(), 0, "DESELECT ALL");
        super.onCreateContextMenu(menu, v, menuInfo);
    }
    @Override
    public boolean onContextItemSelected(MenuItem item) {
        if(item.getTitle()=="TEST")
        {
            for(i=0,j=0;i<11;i++)
            {
                check_box = (CheckBox)Root_view.findViewById(check_box_count[i]);
                if(check_box.isChecked()==true)
                Checked_Count[j++]=i+1;
            }
            if(j==0)
            Toast.makeText(getActivity(), "Tests not selected", Toast.LENGTH_LONG).show();      
            else
            {
                //Perform Operations

        }



        if(item.getTitle()=="SELECT ALL"){
            for(i=0;i<11;i++){
            check_box_2 = (CheckBox)Root_view.findViewById(check_box_count[i]);
            check_box_2 = (CheckBox)((TableRow)table.getChildAt(i)).getChildAt(4);

            }
            }
        return super.onContextItemSelected(item);
    }

    }