Get contacts and send to server as a vcf file in android

Asked Mar 11 '19 at 08:04

Active Mar 11 '19 at 08:49

Viewed 730 times

I am trying to convert my contacts to .vcf file in android but it gives an error and can not export contacts.

It gives me an error it goes in the catch block and gives:

java.lang.NegativeArraySizeException: -1

I want to export my all contacts to server using vcf file

public void getVCF() {
 final String vfile = "Contacts.vcf";
 Cursor phones = mContext.getContentResolver().query(
  ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null,
  null, null, null);
 phones.moveToFirst();
 for (int i = 0; i < phones.getCount(); i++) {
  String lookupKey = phones.getString(phones
   .getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
  Uri uri = Uri.withAppendedPath(
   ContactsContract.Contacts.CONTENT_VCARD_URI,
   lookupKey);
  AssetFileDescriptor fd;
  try {
   fd = mContext.getContentResolver().openAssetFileDescriptor(uri, "r");
   FileInputStream fis = fd.createInputStream();
   byte[] buf = new byte[(int) fd.getDeclaredLength()];
   fis.read(buf);
   String VCard = new String(buf);
   String path = Environment.getExternalStorageDirectory()
    .toString() + File.separator + vfile;
   FileOutputStream mFileOutputStream = new FileOutputStream(path,
    true);
   mFileOutputStream.write(VCard.toString().getBytes());
   phones.moveToNext();
   filevcf = new File(path);
   Log.d("Vcard", VCard);
  } catch (Exception e1) {
   // TODO Auto-generated catch block
   e1.printStackTrace();
  }
 }
}

edited Mar 11 '19 at 08:49

squaleLis

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asked Mar 11 '19 at 08:04

Mind Werx

did you request all required permissions? – Vladyslav Matviienko Mar 11 '19 at 08:08
Possible duplicate of [Export the Contacts as VCF file](https://stackoverflow.com/questions/8147563/export-the-contacts-as-vcf-file) – Rohit5k2 Mar 11 '19 at 08:08
Another one -> https://stackoverflow.com/questions/13702357/how-to-generate-a-vcf-file-from-an-object-which-contains-contact-detail-and-obj – Rohit5k2 Mar 11 '19 at 08:09
There are many solutions on SO. Did you try any? Also, please post full stack trace, not just a part. – Rohit5k2 Mar 11 '19 at 08:09
yes i have given all permissions @VladyslavMatviienko – Mind Werx Mar 11 '19 at 08:12
what does `fd.getDeclaredLength()` return? -1 ??? – pskink Mar 11 '19 at 08:21
yes it gives -1 @pskink – Mind Werx Mar 11 '19 at 08:30
so you have the answer - you cannot do: `new byte[-1]` – pskink Mar 11 '19 at 08:31
i didnt get your answer @pskink – Mind Werx Mar 11 '19 at 08:42
you cannot create an array with length < 0 - how do you imagine an array that has -1 elements? – pskink Mar 11 '19 at 08:43
so what can i do?@pskink – Mind Werx Mar 11 '19 at 08:47
i would do `byte[] buf = new byte[1024];` for such vcard buffer - but of course you have to check what is the average size of your data and adjust it if its much bigger – pskink Mar 11 '19 at 08:50

Get contacts and send to server as a vcf file in android

0 Answers0