Develop Reference

SQL in android dosent work

I want to update a row in a SQL table in a column (`click'). I can see the row in debug but it isn't recognized.
If click==0 so change to click==1.
Does someone know what is my mistake?
My code is:
public void UpdateClicked2(String name, int table) {
ContentValues values = new ContentValues();
String selectQuery = "SELECT * FROM " + MySQLiteGUESTS.TABLE_NAME
+ " WHERE " + MySQLiteGUESTS.COLUMN_TABLE + "=" + table;
Cursor cursor = database.rawQuery(selectQuery, null);
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
GuestInfo comment = cursorToComment(cursor);
if (comment.getName().toString() != name)
cursor.moveToNext();
else {
if (comment.getClick() == 1) {
values.put(MySQLiteGUESTS.COLUMN_CLICK, 0);
} else
values.put(MySQLiteGUESTS.COLUMN_CLICK, 1);
}
}
String newString = MySQLiteGUESTS.COLUMN_NAME + " = " + name;
database.update(MySQLiteHelper.TABLE_NAME, values, newString, null);
}

if (comment.getName().toString() != name)
Instead of this
Use this:
if (comment.getName().toString().equals(name))
{
}

Contact photo not updating for a select few

I was recently playing around with some code that goes through my contacts and creates an identicon for any contact that does not have a photo set. For the most part this ended up working quite well but for some reason I have a handful of contacts that will not update. Log output says it is creating the photo. The update() returns 1 indicating 1 row was updated and stepping through the code for a contact that never seems to show the new photo looks good.
The fact that only a select few are not updating is what is really bugging me and I'm guessing there must be something I am doing wrong or missing here.
private void processContacts() {
Cursor cursor = getContacts();
Log.d(TAG, "Processing " + cursor.getCount() + " contacts");
while(cursor.moveToNext()) {
final long contactId = cursor.getLong(0);
final String name = cursor.getString(1);
if (!TextUtils.isEmpty(name)) {
final Uri contactUri = ContentUris.withAppendedId(
ContactsContract.Contacts.CONTENT_URI,
contactId);
if(ContactsContract.Contacts.openContactPhotoInputStream(getContentResolver(),
contactUri, true) == null) {
Log.d(TAG, String.format("Creating identicon for %s", name));
generateIdenticon(contactId, name);
} else {
Log.i(TAG, String.format("%s already has a contact photo", name));
}
}
}
cursor.close();
}
private Cursor getContacts() {
Uri uri = ContactsContract.Contacts.CONTENT_URI;
String[] projection = new String[] { ContactsContract.Contacts._ID,
ContactsContract.Contacts.DISPLAY_NAME };
String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
+ " COLLATE LOCALIZED ASC";
return getContentResolver().query(uri, projection, null, null, sortOrder);
}
private void generateIdenticon(long contactId, String name) {
if (!TextUtils.isEmpty(name)) {
updateNotification(getString(R.string.identicons_creation_service_running_title),
String.format(getString(R.string.identicons_creation_service_contact_summary),
name));
final byte[] hash = Identicon.generateHash(name);
final byte[] identicon = Identicon.generateIdenticonByteArray(hash);
if (identicon == null) {
Log.e(TAG, "generateIdenticon() - identicon for " + name + " is null!");
} else {
if (!setContactPhoto(getContentResolver(), identicon, contactId)) {
Log.e(TAG, "Unable to save identicon for " + name);
}
}
}
}
private boolean setContactPhoto(ContentResolver resolver, byte[] bytes, long personId) {
ContentValues values = new ContentValues();
int photoRow = -1;
String where = ContactsContract.Data.RAW_CONTACT_ID + " == " +
String.valueOf(personId) + " AND " + ContactsContract.Data.MIMETYPE + "=='" +
ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE + "'";
Cursor cursor = resolver.query(
ContactsContract.Data.CONTENT_URI,
null,
where,
null,
null);
int idIdx = cursor.getColumnIndexOrThrow(ContactsContract.Data._ID);
if(cursor.moveToFirst()){
photoRow = cursor.getInt(idIdx);
}
cursor.close();
values.put(ContactsContract.Data.RAW_CONTACT_ID, personId);
values.put(ContactsContract.Data.IS_PRIMARY, 1);
values.put(ContactsContract.Data.IS_SUPER_PRIMARY, 1);
values.put(ContactsContract.CommonDataKinds.Photo.PHOTO, bytes);
values.put(ContactsContract.Data.MIMETYPE, ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE);
if (photoRow >= 0) {
final int rowsUpdated = resolver.update(ContactsContract.Data.CONTENT_URI,
values, ContactsContract.Data._ID + "=" + photoRow, null);
return rowsUpdated >= 1;
} else {
final Uri uri = resolver.insert(ContactsContract.Data.CONTENT_URI, values);
return uri != null && !TextUtils.isEmpty(uri.toString());
}
}
All this is being done inside a background service and all my contacts are synced via google. One last thing to note is that these select contacts always return null when I call ContactsContract.Contacts.openContactPhotoInputStream() to see if a photo is available (even after I've attempted to update the photo).
Any help or insight about what may be going on is greatly appreciated.

Check if values exits in database

I want to check if a couple of values exists in the database. If they do, the method should return TRUE or FALSE if the cursor is null. But the problem is that it returns TRUE all the time despite the values are not in the database! What have I missed?
// This method check if the combination image path and contact name already exists in database
public boolean checkContentDatabase(String imageFilePath, String contactName) {
String query = "Select * from " + DB_TABLE+ " where " + TABLE_IMAGE_PATH + "='" + imageFilePath + "' and " + TABLE_CONTACT_NAME + "='" + contactName +"' ;";
Cursor c = db.rawQuery(query, null);
if(c != null) // Exists in database
{
return true;
}
else
{
return false;
}
}

Replace your if condition with:
if(c.getCount() > 0)
{
return true;
}
else
{
return false;
}

use c != null && c.getCount() > 0 instead of c != null

public boolean checkContentDatabase(String imageFilePath, String contactName) {
String query = "Select * from " + DB_TABLE+ " where " + TABLE_IMAGE_PATH + "='" + imageFilePath + "' and " + TABLE_CONTACT_NAME + "='" + contactName +"' ;";
Cursor c = db.rawQuery(query, null);
c.moveToFirst();
if(c.isAfterLast() == false) {
return true;
}
else
{
return false;
}
}

The cursor is not null, because its been created successfully. Only your result set does not exist. Try using "SELECT 1 FROM..." and then check if the result equals 1.

remove contact from a specific group in android

I am making an android app, I want to remove a contact from a specific group not to delete contact just remove from the group, I have group id and contact id, can anyone please tell me the query to do this,
I want to implement something like Delete contact_id=1 from group_id=2

Contacts are linked to groups with ContactsContract.CommonDataKinds.GroupMembership records. You can use something like this to delete contact from group:
private void deleteContactFromGroup(long contactId, long groupId)
{
ContentResolver cr = getContentResolver();
String where = ContactsContract.CommonDataKinds.GroupMembership.GROUP_ROW_ID + "=" + groupId + " AND "
+ ContactsContract.CommonDataKinds.GroupMembership.RAW_CONTACT_ID + "=?" + " AND "
+ ContactsContract.CommonDataKinds.GroupMembership.MIMETYPE + "='"
+ ContactsContract.CommonDataKinds.GroupMembership.CONTENT_ITEM_TYPE + "'";
for (Long id : getRawContactIdsForContact(contactId))
{
try
{
cr.delete(ContactsContract.Data.CONTENT_URI, where,
new String[] { String.valueOf(id) });
} catch (Exception e)
{
e.printStackTrace();
}
}
}
private HashSet<Long> getRawContactIdsForContact(long contactId)
{
HashSet<Long> ids = new HashSet<Long>();
Cursor cursor = getContentResolver().query(RawContacts.CONTENT_URI,
new String[]{RawContacts._ID},
RawContacts.CONTACT_ID + "=?",
new String[]{String.valueOf(contactId)}, null);
if (cursor != null && cursor.moveToFirst())
{
do
{
ids.add(cursor.getLong(0));
} while (cursor.moveToNext());
cursor.close();
}
return ids;
}
Note that when you perform delete, you should specify RAW_CONTACT_ID instead of CONTACT_ID. So you need to query all raw contact ids for specified contact.
Also you may need to consider account data. In that case change querying for contact ids to something like that:
Uri rawContactUri = RawContacts.CONTENT_URI.buildUpon()
.appendQueryParameter(RawContacts.ACCOUNT_NAME, accountName)
.appendQueryParameter(RawContacts.ACCOUNT_TYPE, accountType).build();
Cursor cursor = getContentResolver().query(rawContactUri,
new String[] { RawContacts._ID }, RawContacts.CONTACT_ID + "=?",
new String[] { String.valueOf(contactId) }, null);

public static Uri addContactToGroup(String rawContactId,String groupId)
{
try
{
ContentValues values = new ContentValues();
values.put(Data.RAW_CONTACT_ID, rawContactId);
values.put(GroupMembership.GROUP_ROW_ID, groupId);
values.put(Data.MIMETYPE, GroupMembership.CONTENT_ITEM_TYPE);
return getContentResolver.insert(Data.CONTENT_URI, values);
}
catch (Exception e)
{}
return Uri.EMPTY;
}
//-----------------------------------
public static int removeContactFromGroup(String contactId,String groupId)
{
try
{
String where = Data.CONTACT_ID + " = ? AND " + Data.MIMETYPE + " = ? AND " + GroupMembership.GROUP_ROW_ID + " = ?";
String[] args = {contactId, GroupMembership.CONTENT_ITEM_TYPE, groupId};
return getContentResolver.delete(Data.CONTENT_URI, where, args);
}
catch (Exception e)
{}
return 0;
}

How to programmatically assign a picture (Bitmap) to a contact?

I have a variable of type Bitmap and I would like to assign it to a Contact from my contact list as the CalledID picture, how would I do that?

You have to creat your own mime type for those.
Here is an example that saves a boolean as my custom mime type to the contacts. It uses the latest SDK 2.1
Important
This example uses DATA1 for data, DATA1 is indexed but it's not recomended for binary data.
In your case to store binary data such as Picture you have to use DATA15.
By convention, DATA15 is used for storing BLOBs (binary data).
public static final String MIMETYPE_FORMALITY = "vnd.android.cursor.item/useformality";
public clsMyClass saveFormality() {
try {
ContentValues values = new ContentValues();
values.put(Data.DATA1, this.getFormality() ? "1" : "0");
int mod = ctx.getContentResolver().update(
Data.CONTENT_URI,
values,
Data.CONTACT_ID + "=" + this.getId() + " AND "
+ Data.MIMETYPE + "= '"
+ clsContacts.FORMALITY_MIMETYPE + "'", null);
if (mod == 0) {
values.put(Data.CONTACT_ID, this.getId());
values.put(Data.MIMETYPE, clsContacts.FORMALITY_MIMETYPE);
ctx.getContentResolver().insert(Data.CONTENT_URI, values);
}
} catch (Exception e) {
Log.v(TAG(), "saveFormality failed");
}
return this;
}
public boolean getFormality() {
if (data.containsKey(FORMALITY)) {
return data.getAsBoolean(FORMALITY);
} else {
// read formality
Cursor c = readDataWithMimeType(clsContacts.MIMETYPE_FORMALITY, this.getId());
if (c != null) {
try {
if (c.moveToFirst()) {
this.setFormality(c.getInt(0) == 1);
return (c.getInt(0) == 1);
}
} finally {
c.close();
}
}
return false;
}
}
public clsMyClass setFormality(Boolean value) {
data.remove(FORMALITY);
data.put(FORMALITY, value);
return this;
}
/**
* Utility method to read data with mime type
*
* #param mimetype String representation of the mimetype used for this type
* of data
* #param contactid String representation of the contact id
* #return
*/
private Cursor readDataWithMimeType(String mimetype, String contactid) {
return ctx.getContentResolver().query(
Data.CONTENT_URI,
new String[] {
Data.DATA1
},
Data.RAW_CONTACT_ID + "=" + contactid + " AND " + Data.MIMETYPE + "= '" + mimetype
+ "'", null, null);
}
Usage is
objContact.setFormality(true).saveFormality();