How to split an ArrayList and store the data into a String array in android?

Question

In my application I am storing string type data in arraylist with "|" operator as separator. i.e my array-list contains data like [|123,124,|,324,543|789,649,666,356] Now I need to split the arraylist with "|" and need to store the data into a string array. How can I do that?

My Code:

ArrayList<String> arr2;
ArrayList<ArrayList<String>> alllist;
String[] str;

for (j = 0; j < alllist.size(); j++) {
    arr2 = new ArrayList<String>();
    arr2 = alllist.get(j);

    for (Object v : arr2) {
        str = v.toString().split("|");
        System.out.println("checking str[i]" + str[i]);

        if (str[j].contains(",")) {
            System.out.println("hii");
        } 
    }
}

It is showing error at if(str[j].contains(",")) line....Please help me regarding this.. thanks in advance...

What type does the str variable have? AFAIK, the split() method returns an array of Strings, but the String class does not have the contains() method. — Egor
– Egor, Commented Mar 19, 2012 at 13:53
Can you post code that is compilable, puts some sample data in your ArrayList, and let us know what output you expect so that we better understand what you are trying to achieve? — assylias
– assylias, Commented Mar 19, 2012 at 14:04

assylias · Accepted Answer · 2012-03-19 14:11:17Z

1

Not sure what you want to achieve, but this could help you to build your code:

public static void main(String args[]) throws ParseException {

    List<List<String>> allList = new ArrayList<List<String>>();
    allList.add(Arrays.asList("|123,124,|,324,543|789,649,666,356"));

    for (List<String> list : allList) { //use a for each loop instead of looping on an int and using allList.get(i)
        for (String s : list) { //Same thing
            String[] str = s.split("\\|"); //You need to escape | with \\ to get the expected split
            for (String item : str) {
                System.out.println("checking " + item);
                if (item.contains(",")) {
                    System.out.println("hii");
                }
            }

        }
    }
}

answered Mar 19, 2012 at 14:11

assylias

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Comments

user2553189 · Accepted Answer · 2013-12-31 10:57:01Z

1

Why Don't you simply use this :

List<String> flag2=new ArrayList<String>();
String flag[]=new String[flag2.size()];

for(int i=0;i<flag2.size();i++){
    flag[i]=flag2.get(i);
}

answered Dec 31, 2013 at 10:57

user2553189

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Comments

Ian2thedv · Accepted Answer · 2015-07-08 08:47:32Z

0

public void onClick(View v){
    String teks = txtinput.getText().toString();
    String[] tempPesanMasuk = teks.split("_");
    ArrayList<String> teks_lengkap = new ArrayList<String>();
    String teksJadi = "";

    for(int i = 0; i < tempPesanMasuk.length; i++)
        teks_lengkap.add(tempPesanMasuk[i].trim());

    for(int i = 0; i < tempPesanMasuk.length ; i++)
        teksJadi = teksJadi + teks_lengkap.get(i) + " ";

    System.out.println(teksJadi);
}

edited Jul 8, 2015 at 8:47

Ian2thedv

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answered Jul 8, 2015 at 7:58

kata sony

1

1 Comment

SuperBiasedMan Over a year ago

Welcome to Stack Overflow! Please explain what your code does and why it will solve the problem. An answer that just contains code (even if it's working) usually wont help the OP to understand their problem.

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