Develop Reference

Android content provider query not retrieving updated information

So I've written a query to extract the WhatsApp contacts of a phone. My initial query goes like this:
Cursor c = con.getContentResolver().query(
ContactsContract.RawContacts.CONTENT_URI,
new String[]{ContactsContract.RawContacts.CONTACT_ID, ContactsContract.RawContacts.DISPLAY_NAME_PRIMARY},
ContactsContract.RawContacts.ACCOUNT_TYPE + "= ?",
new String[]{"com.whatsapp"},
null
);
ArrayList<String> myWhatsappContacts = new ArrayList<String>();
int contactNameColumn = c.getColumnIndex(ContactsContract.RawContacts.DISPLAY_NAME_PRIMARY);
while (c.moveToNext()) {
// You can also read RawContacts.CONTACT_ID to read the
// ContactsContract.Contacts table or any of the other related ones.
myWhatsappContacts.add(c.getString(contactNameColumn));
}
The purpose of this is to find out how many WhatsApp contacts the phone has at any one time. When I do:
Log.i("WhatsApp contacts found:", Integer.toString(myWhatsappContacts.size());
It should print out how many WhatsApp contacts there were into LogCat. And this works - up to a point.
Let's say for example that the number of WhatsApp contacts I have now is 101. The next phase of this little project is to delete away ALL contacts if there are more than 100 of them. In which case, we go:
if (myWhatsappContacts.size() > 100) {
//Delete all contacts code here
}
I've tested the delete contacts code, it works. I check the contacts directory of the phone via the contacts app, and it says 0. But now when I do the query again (refer to code above), it still shows 101! What's going on?
If it helps, my DeleteContacts method is as follows:
private void deleteContact(Context ctx, String phone, String name) {
Uri contactUri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phone));
Cursor cur = ctx.getContentResolver().query(contactUri, null, null, null, null);
try {
if (cur.moveToFirst()) {
do {
if (cur.getString(cur.getColumnIndex(ContactsContract.PhoneLookup.DISPLAY_NAME)).equalsIgnoreCase(name)) {
String lookupKey = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_LOOKUP_URI, lookupKey);
ctx.getContentResolver().delete(uri, null, null);
return;
}
} while (cur.moveToNext());
}
} catch (Exception e) {
System.out.println(e.getStackTrace());
} finally {
cur.close();
}
return;
}
What am I doing wrong? Is my DeleteContacts code faulty? Or is the query itself faulty?

How to obtain the contact Uri directly with contact creation

my app creates new contacts with ContentProviderOperation. The problem is, I need a reference to the new contact because I need some information of it to display it in a listview and go with intent into the contact app to the contact.
The best thing would be the ID, but I´ve read that it might change during operations on the database, which won´t be helpful to me.
Now I thought, the Uri might be the best thing, because I could later retrieve the contactID or lookup key.
How do I get the Uri directly after calling applyBatch() ?
EDIT:
Here is a solution, but not really a good one.
He is putting a randomly generated token into each contact, then he makes a new query with it.
I want neither put some extra data into the contacts, nor starting a second query. But if there is no other possibility I´ll do it that way.

simply call
private String retrieveContactId(String phoneNo) {
try {
Uri uri = Uri.withAppendedPath(ContactsContract.PhoneLookup.CONTENT_FILTER_URI, Uri.encode(phoneNo));
String[] projection = new String[] { ContactsContract.PhoneLookup._ID, ContactsContract.PhoneLookup.DISPLAY_NAME };
String selection = null;
String[] selectionArgs = null;
String sortOrder = ContactsContract.PhoneLookup.DISPLAY_NAME + " COLLATE LOCALIZED ASC";
ContentResolver cr = getApplicationContext().getApplicationContext().getContentResolver();
String contactId = null;
if (cr != null) {
Cursor resultCur = cr.query(uri, projection, selection, selectionArgs, sortOrder);
if (resultCur != null) {
while (resultCur.moveToNext()) {
contactId = resultCur.getString(resultCur.getColumnIndex(ContactsContract.PhoneLookup._ID));
Log.e("Info Incoming", "Contact Id : " + contactId);
return contactId;
}
resultCur.close();
}
}
} catch (Exception sfg) {
Log.e("Error", "Error in loadContactRecord : " + sfg.toString());
}
return null;
}
and for the uri
Uri contactUri = Contacts.getLookupUri(
Integer.valueOf(rawContactId), clookup);

Android getting contact phone image

Hey all i have a programmer thats having some trouble with getting my phone image to display in an app. the following code is what he is using to get the contact picture:
private long getContactIdFromNumber(String number) {
Cursor c = null;
try {
String[] projection = new String[] { Contacts.Phones.PERSON_ID };
Uri contactUri = Uri.withAppendedPath(
Contacts.Phones.CONTENT_FILTER_URL, Uri.encode(number));
c = getContentResolver().query(contactUri, projection, null, null,
null);
if (c.moveToFirst()) {
long contactId = c.getLong(c
.getColumnIndex(Contacts.Phones.PERSON_ID));
return contactId;
}
} finally {
c.close();
}
return -1;
}
private boolean initPhoto() {
boolean result = true;
try {
contactPhoto = People.loadContactPhoto(getApplicationContext(),
ContentUris.withAppendedId(People.CONTENT_URI,
getContactIdFromNumber(phoneNumber)),
R.drawable.header, null);
} catch (Exception e) {
result = false;
}
return result;
}
if (initPhoto()) {
contact1.setImageBitmap(contactPhoto);
contact2.setImageBitmap(contactPhoto);
contact3.setImageBitmap(contactPhoto);
}
I made a contact with my phone number and image but it never loads up in the app. What should he be looking for in the code i posted above in order to make sure it is grabbing the correct phone number?

Do you have to use Contacts instead of ContactsContract? Contacts was deprecated in API level 5.
If you're trying to load a photo for a phone number, use ContactsContract.PhoneLookup. There's an example in the reference doc for android.provider.ContactsContract.PhoneLookup. Querying on that table will return LOOKUP_KEY for the Contact. Use that to query
ContactsContract.Contacts.Photo.

Turned out the number was formatted incorrectly. It was looking for xxxxxxxxxx and the number was this way (xxx)xxx-xxxx in the phone so it never matched up.

How to Create a Playlist

I am trying to create an app which simply offers an edittext and imagebutton. If the butten gets clicked, the idea is that an album is added to the Playlist, named in the edittext box. Albums should be selected randomly. Goes without saying that the album tracks should be in the correct order.
I can add more functionality later eg. save, overwrite, delete etc.
I have the interface but am struggling with the code. I sort of get the concept of ContentProviders.
so the code needs to:
access the Playlists, which I believe is achieved by using MediaStore.Audio.Playlists
access the Albums, which I believe is achieved by using MediaStore.Audio.Albums
add to the Playlist
I have the following code (most bits obtained from this site. Thanks btw) to access the Playlist but it crashes with a Null Exception error.
public void checkforplaylists()
{
//Get a cursor over all playlists.
final ContentResolver resolver= MediaProvider.mContentResolver;
final Uri uri=MediaStore.Audio.Playlists.INTERNAL_CONTENT_URI;
final String id=MediaStore.Audio.Playlists._ID;
final String name=MediaStore.Audio.Playlists.NAME;
final String[]columns={id,name};
final Cursor playlists= resolver.query(uri, columns, null, null, null);
if(playlists==null)
{
Log.e(TAG,"Found no playlists.");
return;
}
return;
}
Anyone who can help?

I think you mean NullPointerException, which means one of your assignments is null and then you try to access a member of the object you intended it to be. Most likely it is resolver, but to be sure you need the line number reported and/or to step through that with a debugger.

This works. When using the ContentResolver, the Context (this) is required.
public void checkforplaylists(Context context)
{
ContentResolver cr = context.getContentResolver();
final Uri uri=MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;
final String id=MediaStore.Audio.Playlists._ID;
final String name=MediaStore.Audio.Playlists.NAME;
final String[]columns={id,name};
final Cursor playlists= cr.query(uri, columns, null, null, null);
if(playlists==null)
{
Log.e(TAG,"Found no playlists.");
return;
}
Log.e(TAG,"Found playlists.");
return;
}

use this code, will work
public boolean addPlaylist(String pname) {
Uri playlists = MediaStore.Audio.Playlists.EXTERNAL_CONTENT_URI;
Cursor c = resolver.query(playlists, new String[] { "*" }, null, null,
null);
long playlistId = 0;
c.moveToFirst();
do {
String plname = c.getString(c
.getColumnIndex(MediaStore.Audio.Playlists.NAME));
if (plname.equalsIgnoreCase(pname)) {
playlistId = c.getLong(c
.getColumnIndex(MediaStore.Audio.Playlists._ID));
break;
}
} while (c.moveToNext());
c.close();
if (playlistId != 0) {
Uri deleteUri = ContentUris.withAppendedId(playlists, playlistId);
Log.d(TAG, "REMOVING Existing Playlist: " + playlistId);
// delete the playlist
resolver.delete(deleteUri, null, null);
}
Log.d(TAG, "CREATING PLAYLIST: " + pname);
ContentValues v1 = new ContentValues();
v1.put(MediaStore.Audio.Playlists.NAME, pname);
v1.put(MediaStore.Audio.Playlists.DATE_MODIFIED,
System.currentTimeMillis());
Uri newpl = resolver.insert(playlists, v1);
Log.d(TAG, "Added PlayLIst: " + newpl);
flag=true;
return flag;
}

How can I get an outgoing mms's address in android

I've spent 5 days trying out different things and lots of googling with no luck
I have a broadcast receiver to monitor and backup incoming mms & sms.
The sms - outgoing and incoming is easy no problem. MMS however...
I have a broadcast receiver for incoming MMS, no problem there.
For outgoing MMS however, I use a content observer directed towards content://mms
heres the part registering the content observer from the service class
mo = new MMSObserver(new Handler(),getApplicationContext());
try{
getContentResolver().unregisterContentObserver(mo);
}
finally{
getContentResolver().registerContentObserver(Uri.parse("content://mms"), true, mo);
}
This is the onchange part in the above content observer
public void onChange(boolean bSelfChange)
{
super.onChange(bSelfChange);
Log.i(TAG,"MMSObserver onChange");
ContentResolver contentResolver = context.getContentResolver();
Uri uri = Uri.parse("content://mms");
Cursor cur = contentResolver.quert("content://mms",null,null,null,null)
if(cur.moveToNext()){
String id = cur.getString(cur.getColumnIndex("_id"));
String date = cur.getString (cur.getColumnIndex ("date"));
String address = getAddress(id);
}
}
private static String getAddress(String id){
String selectionAdd = new String("msg_id=" + id);
String uriStr = MessageFormat.format("content://mms/{0}/addr", id);
Uri uriAddress = Uri.parse(uriStr);
Cursor cAdd = context.getContentResolver().query(uriAddress, null,
selectionAdd, null, null);
String name = null;
if (cAdd.moveToFirst()) {
do {
String number = cAdd.getString(cAdd.getColumnIndex("address"));
if (number != null) {
try {
Long.parseLong(number.replace("-", ""));
name = number;
} catch (NumberFormatException nfe) {
if (name == null) {
name = number;
}
}
}
} while (cAdd.moveToNext());
}
if (cAdd != null) {
cAdd.close();
}
return name;
}
The problem is the address column always returns "insert-address-token" for outgoing mms.
Is there any possible way to get the number the mms is going to?
Also I noticed that the content observer is triggered when the message is in draft form not when it is sent or pending. since depending on those uris is generally a bad idea since they're not part of the sdk, i switched to a different method. cataloging all sms & mms messages and storing their _id columns, and just syncing them with the backup. However my problem still remains.
MMS address column is always "insert-address-token"
Any suggestions?

You may want to try something like this:
Uri uri = Uri.parse("content://mms-sms/conversations/" + mThreadId);
String[] projection = new String[] {
"body", "person", "sub", "subject", "retr_st", "type", "date", "ct_cls", "sub_cs", "_id", "read", "ct_l", "st", "msg_box", "reply_path_present", "m_cls", "read_status", "ct_t", "status", "retr_txt_cs", "d_rpt", "error_code", "m_id", "date_sent", "m_type", "v", "exp", "pri", "service_center", "address", "rr", "rpt_a", "resp_txt", "locked", "resp_st", "m_size"
};
String sortOrder = "normalized_date";
Cursor mCursor = getActivity().getContentResolver().query(uri, projection, null, null, sortOrder);
String messageAddress;
int type;
while (mCursor.moveToNext()) {
String messageId = mCursor.getString(mCursor.getColumnIndex("_id"));
Uri.Builder builder = Uri.parse("content://mms").buildUpon();
builder.appendPath(messageId).appendPath("addr");
Cursor c = mContext.getContentResolver().query(builder.build(), new String[] {
"*"
}, null, null, null);
while (c.moveToNext()) {
messageAddress = c.getString(c.getColumnIndex("address"));
if (!messageAddress.equals("insert-address-token")) {
type = c.getInt(c.getColumnIndex("type"));
c.moveToLast();
}
}
c.close();
}
I am not actually calling the mCursor's moveToNext() method in my code but instead I am implementing this logic in the getView() method of a SimpleCursorAdapter.