private void quickSort(List<Map<String,Integer>> list){
    sort(list,0,list.size()-1);
}

private void sort(List<Map<String,Integer>> list, int from, int to){
    if(from <to){
        int pivot=from;
        int left=from+1;
        int right =to;

        Map<String, Integer> mapValue=list.get(pivot);
        // Map.Entry<String,Integer> entry=mapValue.entrySet().iterator().next();

        int pivotValue=0;

        for (Map.Entry<String, Integer> entryPivot: mapValue.entrySet()){
            pivotValue=entryPivot.getValue();
        }
        // int pivotValue=entry.getValue();

        while(left<=right){
            // left <= to  -> limit protection
            Map<String, Integer> mapValueLeft=list.get(left);
            // Map.Entry<String,Integer> entryLeft=  mapValueLeft.entrySet().iterator().next();
            int valueLeft=0;
            int valueRight=0;
            for(Map.Entry<String,Integer> entryLeft: mapValueLeft.entrySet()){
                valueLeft= entryLeft.getValue();
            }
            while(left <=to && pivotValue >= valueLeft){
                left++;
            }
            // right > from -> limit protection
            Map<String, Integer> mapValueRight=list.get(right);
            // Map.Entry<String,Integer> entryRight= mapValueRight.entrySet().iterator().next();
            for(Map.Entry<String,Integer> entryRight: mapValueRight.entrySet()){
                valueRight= entryRight.getValue();
            }
            while ((right > from && pivotValue < valueRight)){
                right --;
            }
            if (left < right){
                Collections.swap(list,left,right);
            }
        }
        Collections.swap(list,pivot, left -1);
        sort(list, from, right -1);
        sort(list, right + 1, to);
    }
}

01-31 10:53:23.095 1378-1378/usa.com.myapp E/AndroidRuntime: FATAL EXCEPTION: main
                                                                         Process: usa.com.myapp, PID: 1378
                                                                         java.lang.StackOverflowError
                                                                             at java.util.HashMap$EntryIterator.<init>(HashMap.java:841)
                                                                             at java.util.HashMap$EntryIterator.<init>(HashMap.java:841)
                                                                             at java.util.HashMap.newEntryIterator(HashMap.java:909)
                                                                             at java.util.HashMap$EntrySet.iterator(HashMap.java:954)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:369)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:401)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:400)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:401)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:400)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:400)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:401)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:401)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:401)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:401)
                                                                             at usa.com.myapp.fragment.MyFragment.sort(MyFragment.java:400)