How to Correctly Convert an ArrayList to a String[] Array in Android?

Convert ArrayList to String[] array in Android

In Android, converting an ArrayList to a String[] array requires a slightly different approach than using the standard toArray() method.

Problem:

Trying to convert an ArrayList to a String[] array using:

String [] stockArr = (String[]) stock_list.toArray();

results in an empty array.

Solution:

To correctly convert an ArrayList to a String[] array:

1. Create a new String array with the same size as the ArrayList.
2. Use the toArray() method to copy the elements of the ArrayList into the new String array.

Here's an example:

List<String> stockList = new ArrayList<String>();
stockList.add("stock1");
stockList.add("stock2");

String[] stockArr = new String[stockList.size()];
stockList.toArray(stockArr);

for (String s : stockArr) {
    System.out.println(s);
}

This code will output:

stock1
stock2

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