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up vote 3 down vote favorite
1

i have data fetched from my webservice in

ArrayList<HashMap<String,String>>

Now i want to convert each object of the above to

String[]

how do i do this? any help would be much appreciated!

share|improve this question
    
it contains data obtained from a webservice serving json data. i need to extract each field as a string array for populating them into different views like viwepagers and list views. –  Niraj Adhikari Jul 29 '13 at 11:33
1  
stackoverflow.com/questions/1090556/… this might help. –  Raghunandan Jul 29 '13 at 12:00
    
In the array you want to put hashmap's keys, values or both? –  Alberto Jul 29 '13 at 12:58
1  
Please cover my tutorial on internal life of HashMap,ArrayList and other Java collection types here –  Volodymyr Levytskyi Jul 29 '13 at 13:52

2 Answers 2

up vote 0 down vote accepted

try 

ArrayList<HashMap<String, String>> test = new ArrayList<HashMap<String, String>>();
HashMap<String, String> n = new HashMap<String, String>();
n.put("a", "a");
n.put("b", "b");
test.add(n);

HashMap<String, String> m = test.get(0);//it will get the first HashMap Stored in array list 

String strArr[] = new String[m.size()];
int i = 0;
for (HashMap<String, String> hash : test) {
    for (String current : hash.values()) {
        strArr[i] = current;
        i++;
    }
}
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up vote 1 down vote

The uses for an Hashmap should be an Index of HashValues for finding the values much faster. I don't know why you have Key and Values as Strings but if you only need the values you can do it like that:

    ArrayList<HashMap<String, String>> test = new ArrayList<>();
    String sum = "";
    for (HashMap<String, String> hash : test) {
        for (String current : hash.values()) {
            sum = sum + current + "<#>";
        }
    }
    String[] arr = sum.split("<#>");

It's not a nice way but the request isn't it too ;)

share|improve this answer
    
thank you Its working :) –  Subhalaxmi Nayak Jan 13 at 15:51

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