Android : How to find a dynamic Match with a Pattern

Ok, so i have been looking for the answer a little bit but cant find any sort of answer to this:

I am creating a file on my mobile and want to write the following:

If a line with this pattern "N:xval,yval" exists for the number N, and furthermore xval and yval arent set, then i want to replace that line with "N:xval+1,yval+{0 or 1}" If there is no line like this i want to create a new line with "N:1,{0 or 1}"

THE ISSUE: it doesnt find a Match

i am at this state:

for (int N=0; N<myNumber; N++){
        Pattern p = Pattern.compile("(\\d+):(\\d+),(\\d+)");
        Matcher m = p.matcher(""+myNumber+":(\\d+),(\\d+)");
        m.find();

        int n, k, val;
        if (m.matches()) {
            val =Integer.parseInt(m.group(1));
            n = Integer.parseInt(m.group(2));
            k = Integer.parseInt(m.group(3));
            ++n;
            if (myBoolean==true){
                ++k;
            }
            line = String.format("%d:%d,%d", val ,n, k);
            try {
                globalwriter.write(line.getBytes(), m.start(), line.length());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }else{
            int l;
            if (myBool==true){
                l =1;
            }else{
                l=0;
            }
            line = String.format("%d:%d,%d \n ", myNumber ,1, l);
            try {
                int end;
                if (checker.length() == 0){
                    end = 0;
                }else{
                    end = (int)checker.length() -1;
                }
                globalwriter.write(line.getBytes(),(int) end,line.length());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }

Thanks for replys, and please dont donate and hate :D