android developer android developer - 3 months ago 7
Android Question

How come updating the contact photo doesn't work in this case?

Background



I want to change the photo of specific contacts in the address book.

The problem



I do some query of the contacts, as such:

final Cursor phonesCursor = context.getContentResolver()
.query(ContactsContract.Data.CONTENT_URI,null,null,null,null);


and then, inside the loop that goes over the cursor, I tried to update the first contact's photo :

if (phonesCursor != null) {
while (phonesCursor.moveToNext()) {
final int rawContactId = phonesCursor.getInt(phonesCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.RAW_CONTACT_ID));
final String phoneNumber = phonesCursor.getString(phonesCursor
.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
String name = phonesCursor.getString(phonesCursor.getColumnIndex(Phone.DISPLAY_NAME));
phonesMap.put(rawContactId, phoneNumber);
Log.d("AppLog", "trying to set image for " + name);
int photoRow = phonesCursor.getInt(phonesCursor.getColumnIndex(Phone._ID));
phonesCursor.close();
final Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.mipmap.ic_launcher);
ByteArrayOutputStream streamy = new ByteArrayOutputStream();
bitmap.compress(CompressFormat.PNG, 0, streamy);
byte[] photo = streamy.toByteArray();

final ContentValues values = new ContentValues();
values.put(ContactsContract.Data.RAW_CONTACT_ID, rawContactId);
values.put(ContactsContract.Data.IS_SUPER_PRIMARY, 1);
values.put(ContactsContract.CommonDataKinds.Photo.PHOTO, photo);
values.put(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE);
final int update = context.getContentResolver().update(ContactsContract.Data.CONTENT_URI, values, ContactsContract.Data._ID + " = " + photoRow, null);
Log.d("AppLog", "update result:" + update);
break;
}
}


Thing is, the result is that "update" returns "1", so it is supposed to be successful, but when I get to the contacts, I don't see this photo.

What I tried



I tried to use a batch instead (using ArrayList and getContentResolver().applyBatch ), but it also didn't work .

I also tried to change the update call, to identify the item I wish to change in a different way (using RAW_CONTACT_ID instead). It also didn't work.

The questions




  1. How come it occurs? What should I do to fix this?

  2. What's the best way to update multiple contacts with new photos?

  3. Is it possible to also get the photo of the contact using the query that I had, without an extra query ? I wish to do it in order to see for myself that the contact was different before.


Answer

OK, the correct field to use is "LOOKUP_KEY" :

int lookupKeyIdx = phonesCursor.getColumnIndex(Phone.LOOKUP_KEY);
final String lookupKey = phonesCursor.getString(lookupKeyIdx);
...
final int update = context.getContentResolver().update(ContactsContract.Data.CONTENT_URI, values, Phone.LOOKUP_KEY + " = " + lookupKey , null);
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