建集合

private ArrayList<Integer> selectposition=new ArrayList<>();//Integer可换任何类型

选中就添加入集合

public void onChoose(final int position){selectposition.add(position);
}

取消则移除集合

public void onNoChoose(final int position){try {selectposition.remove((Object)position);
    } catch (Exception  e) {e.printStackTrace();
    }
}

集合可转为String 1,2,5,8  最后一个省略逗号类型便于上传

private StringBuffer selectstring = new StringBuffer();

for (int i = 0;i<selectposition.size();i++){if (i==ars.size()-1){selectstring.append(selectposition.get(i));
    }else {selectstring.append(selectpsition.get(i)+",");
    }
}

Log.v("lgq","....ssfsdfsf==........."+selectstring);