I have a problem with a ListView on android. Is not really a ListView, because it's implemented on a Sherlock Fragment. So in particular:
I have 2 classes, one is the Fragment, and one is a normal Activity. The Activity downloads one file from the web, and in the Fragment there is a list with the downloaded files.
This is my adapter for the Fragment:
File mydownload = new File (Environment.getExternalStorageDirectory()+ "/Sample Folder");
int i = 0;
while ( i < mydownload.list().length) {
adapter.add(mydownload.list()[i]);
i++;
}
setListAdapter(adapter);
So the adapter catches all the files in the Sample Folder and put it on the list. When I download a file, the adapter doesn't refresh the list (I think because it is in a different context, but I don't know the solution for that). To refresh I have to close and open the application. I tried a lot of possible solution but nothing helped.
edit: my Fragment code:
public class AppleFragment extends SherlockListFragment{
/** An array of items to display in ArrayList */
private static ArrayAdapter<String> adapter = null;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
/** Creating array adapter to set data in listview */
adapter = new ArrayAdapter<String>(getActivity().getBaseContext(), R.layout.liststyle, new ArrayList<String>());
View v = super.onCreateView(inflater, container, savedInstanceState);
/** Setting the array adapter to the listview */
File mydownload = new File (Environment.getExternalStorageDirectory()+ "/Gazzetta Ufficiale");
int i = 0;
while ( i < mydownload.list().length) {
adapter.add(mydownload.list()[i]);
i++;
}
setListAdapter(adapter);
return v;
}
@Override
public void onStart() {
super.onStart();
getListView().setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapter, View view, int position, long id){
String gazza = (String) adapter.getItemAtPosition(position);
File pdf = new File (Environment.getExternalStorageDirectory()+ "/Gazzetta Ufficiale" + "/" + gazza);
try {
Uri path = Uri.fromFile(pdf);
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(path, "application/pdf");
intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
/** Setting the multiselect choice mode for the listview */
//getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
getListView().setOnItemLongClickListener(new OnItemLongClickListener() {
public boolean onItemLongClick (AdapterView<?> arg0, View view, int position, long id){
final int pos = position;
String gazza = (String) arg0.getItemAtPosition(position);
final File pdf = new File (Environment.getExternalStorageDirectory()+ "/Gazzetta Ufficiale" + "/" + gazza);
DialogInterface.OnClickListener dialogClickListener = new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
switch (which){
case DialogInterface.BUTTON_POSITIVE:
//Yes button clicked
pdf.delete();
adapter.remove(adapter.getItem(pos));
adapter.notifyDataSetChanged();
break;
case DialogInterface.BUTTON_NEGATIVE:
//No button clicked
dialog.dismiss();
break;
}
}
};
AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
builder.setMessage("Vuoi eliminare la Gazzetta?").setPositiveButton("Elimina", dialogClickListener)
.setNegativeButton("Annulla", dialogClickListener).show();
return true;
}
});
}
}
Download activity:
private class DownloadFile extends AsyncTask<String, Integer, String> {
@Override
protected String doInBackground(String... sUrl) {
try {
File mydownload = new File (Environment.getExternalStorageDirectory()+ "/Gazzetta Ufficiale");
if (!mydownload.exists()){
mydownload.mkdir();
}
DownloadManager manager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
String url = sUrl[0];
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
request.allowScanningByMediaScanner();
request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
}
request.setAllowedNetworkTypes(
DownloadManager.Request.NETWORK_WIFI | DownloadManager.Request.NETWORK_MOBILE)
.setAllowedOverRoaming(false)
.setTitle("Gazzetta " + sUrl[1])
.setDescription(sUrl [2] + ". In download..")
.setDestinationInExternalPublicDir("/Gazzetta Ufficiale", sUrl[1] + ".pdf");
manager.enqueue(request);
}
catch (Exception e) {
}
return null;
}
@Override
protected void onPreExecute() {
super.onPreExecute();
toast = Toast.makeText(Gazzetta_detail.this, "Download in corso...", Toast.LENGTH_SHORT);
toast.show();
}
}