Travese the child values according to Parent

gistfile1.java

  /* In forward Navigation , index is a variable and automatically incremented when you swipes it , pos_po it is a  position pointer variable , which says you have to pick first child or second child

*/

Class Helper{


public static int temp_child =0,temp_parent=0;

/*

Parent  -> Child
120 -> 1

121 -> 2, 3

122 -> 4, 5

123 -> 6, 7

124 -> 8, 9

125 -> 10, 11

126 -> 12, 13

127 -> 14, 15

128 -> 16, 17

129 -> 18, 19

130 -> 20 , 21

Parent Array List has 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130 */

/* I have hard coded the parent id  array list values as well child arraylist values because these coming dynamically from JSON  */


ArrayList<Integer> parent_arraylist = new ArrayList<integer>();

ArrayList<Integer> child_arraylist = new ArrayList<integer>();


parent_arraylist.add(120); // similarly add 121, 122, 123, 124, 125, 126, 127, 128, 129, 130

child_arraylist.add(1);// simlarly add 2, 3, 4, 5, 6, 7, 8,9, 10, 11, 12, 13, 14, 15, 16, 17, 18 , 19, 20 , 21


// Array list values are loaded

public static int getChild(index){

if(parent_arraylist(index).size !=2){ 

/*
 this will tell us how many child your parent has in the first case only one  child i mean for the parent 120 , it has only one child 1 alone

*/

 index +=1; // incremented because we have to traverse next child because this parent has only one value

 pos_pointer =0;

 temp_child = child_arraylist.get(pos_pointer);
 
 return temp_child;

]
else {

if(pos_pointer == 0) {

temp_child = child_arraylist.get(pos_pointer);

pos_pointer +=1;

return temp_child;

}
else{

temp_child = child_arraylist.get(pos_pointer);

pos_pointer -=1;

index + =1;

return temp_child;
}
}
 
 
/* Backward direction */

if(parent_arraylist(index) ==2){

if(pos_pointer == 0){

pos_pointer =1;

temp_child= child_arraylist.get(pos_pointer);

return temp_child;

}

else{

pos_pointer=0;

temp_child= child_arraylist.get(pos_pointer);

return temp_child;

}

}

} // end of the method

} // end of the Class