Retrieve Data from ArrayList of hash map show null always in Android
Question
I am trying to retrieve data from an arraylist of HashMap but it is always showing null. Strange the listview is showing up the data perfectly.
ArrayList<HashMap<String, String>> songsList = new ArrayList<HashMap<String, String>>();
//Count from the server
int count = dataCount();
for (int i = 0; i < dataCount; i++)
{
HashMap<String, String> map = new HashMap<String, String>();
// adding data to HashMap key => value
map.put(KEY_ID, trackNumber);
map.put(KEY_TITLE, trackTitle);
map.put(KEY_ARTIST, trackArtist);
map.put(KEY_DURATION, trackDuration);
map.put(KEY_THUMB_URL, trackAlbumArt);
// adding HashList to ArrayList
songsList.add(map);
}
I tried the below code after adding the songList it is always null... :(
Log.e("Title","1"+songsList.get(0).get("KEY_TITLE"));
Setting the adapter here:
adapter=new LazyAdapter(this, songsList);
list.setAdapter(adapter);
Solution
Change this
Log.e("Title","1"+songsList.get(0).get("KEY_TITLE"));
to
Log.e("Title","1"+songsList.get(0).get(KEY_TITLE));
No way of telling from the code you posted, but I assume that the value of the KEY_TITLE
constant is actually "title"
instead of "KEY_TITLE"
.
OTHER TIPS
This is because you'r trying to fetch your data with this
Log.e("Title","1"+songsList.get(0).get("KEY_TITLE"));
But you have may be already defined your string in declaration part. So above code gives you always null. So just change
Log.e("Title","1"+songsList.get(0).get(KEY_TITLE));
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