Android stringbuilder elements

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Android

Hello all,
would you be kind to have a look a look at the piece of my code bellow and help
with string retrieve from stringbuilder. What I want to do is split the stringbuilder, convert it to string and get the 1st and 2nd
element and use them as bundle input for database.
Thanks in advance

@Override
            public void onClick(View v) {
                  StringBuilder checkedcontacts= new StringBuilder();
                System.out.println(".............."+ma.mCheckStates.size());
                for(int i = 0; i < name1.size(); i++)

                    {
                    if(ma.mCheckStates.get(i)==true)
                    {
                                      	
                    	checkedcontacts.append(name1.get(i).toString());
                        checkedcontacts.append(" ");
                        checkedcontacts.append(phno1.get(i).toString());
       
                    }
                    else
                    {
                        System.out.println("Not Checked......"+name1.get(i).toString());
                    }

                    
                }

                Toast.makeText(Display.this, checkedcontacts,
                Toast.LENGTH_SHORT).show();