How to put multiple where clause in a query? - android

I have this code below in which gets all data having the 'grpnumber'. my question is: How can I get 2 where clause? i want to get the records having the group number and calories?
String[] projection = {
FoodReaderContract.FoodGroupEntry._ID,
FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_NUMBER,
FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_FOODNAME,
FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_TIMEOFDAY,
FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_CALORIE
};
// Filter results WHERE "title" = 'My Title'
String selection = FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_NUMBER
+ " = ?";
String[] selectionArgs = {grpnumber};
//String selection = FeedReaderContract.FooEntry._ID + " = ?";_
//Int[] selectionArgs = {2};
// How you want the results sorted in the resulting Cursor
String sortOrder =
FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_NUMBER + " DESC";
Cursor cursor = db.query(
FoodReaderContract.FoodGroupEntry.GROUP_TABLE_NAME, // The table to query
projection, // The columns to return
selection, // The columns for the WHERE clause
selectionArgs, // The values for the WHERE clause
null, // don't group the rows
null, // don't filter by row groups
sortOrder // The sort order
);

You can use the AND keyword.
String selection = FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_NUMBER + " = ? "
+ " AND " + FoodReaderContract.FoodGroupEntry.COLUMN_GROUP_CALORIE + " = ?";
String[] selectionArgs = {String.valueOf(grpnumber), String.valueOf(calorie)};

Related

Multiple SelectionArgs for query

I have a String[] that looks like {1, 2, 3 ..} (a string of IDs).
I want to build a query in Android to obtain all the entries that match the IDs.
Here my code:
Cursor idFoodCursor = getContext().getContentResolver().query(
uriFood,
null,
CookingContract.FoodEntry.COLUMN_NAME + " LIKE ?",
new String[]{selectionArgs},
null
);
if (idFoodCursor.moveToFirst()) {
List<String> ids = new ArrayList<String>();
while (!idFoodCursor.isAfterLast()) {
ids.add(idFoodCursor.getString(idFoodCursor.getColumnIndex(CookingContract.FoodEntry._ID)));
idFoodCursor.moveToNext();
}
idFoodCursor.close();
//Convert the ArrayList in String[]
String[] idSelectionArg = new String[ids.size()];
ids.toArray(idSelectionArg);
return new CursorLoader(
getContext(),
uriFood,
FOOD_COLUMNS,
CookingContract.FoodEntry._ID + " = ?",
idSelectionArg,
sortOrder
);
}
The last query doesn't work because I should add as many "?" as my IDs in the array:
Caused by: java.lang.IllegalArgumentException: Cannot bind argument at index 3 because the index is out of range. The statement has 1 parameters.
How can I fix the problem, taking into account what I want to get? (the correspondence of all the ids in the table)
All the over-mentioned code can be replaced with:
return new CursorLoader(
getContext(),
uriFood,
FOOD_COLUMNS,
"_id IN (SELECT _id FROM food WHERE name LIKE ?)",
new String[] {selectionArgs},
sortOrder
);
That does the job I wanted.
public class Constants {
public static final String JOB_STATUS_CANCELLED = "Cancelled";
public static final String JOB_STATUS_COMPLETE = "Complete";
}
selection = JobListContract.JobEntry.COLUMN_NAME_JOB_STATUS + " NOT IN ( ? , ? ) ";
// The spaces matter!!!!
selectionArgs = new String[]{ Constants.JOB_STATUS_COMPLETE, Constants.JOB_STATUS_CANCELLED };
c = db != null ? db.query(
JobListContract.JobEntry.TABLE_NAME, // The table to query
projection, // The columns to return
selection, // The columns for the WHERE clause
selectionArgs, // The values for the WHERE clause
null, // don't group the rows
null, // don't filter by row groups
JobListContract.JobEntry.COLUMN_NAME_ENTRY_ID + " desc" // The sort order
) : null;

Android: Where clause with two parameters in the shame row

I want take data from a row with two parameters, and only return the first.
This is my code:
String[] projection = { VehiculoContentProv.Consumos.ID_VEH_C,
VehiculoContentProv.Consumos.ID_CALCULO_KL,
VehiculoContentProv.Consumos.ID_CALCULO_MG};
String selection = "_idv =" + idV1 + " AND " + idV2;
cursorLoader = new CursorLoader(this, VehiculoContentProv.CONTENT_URI_CONSUMO,
projection,
selection, null, null);
thanks a lot

Android - searching music using MediaStore using a string

I basically can not accomplish this for over 2 weeks now.
I have posted a numerous amount of code over a few questions yet most of them got ignored so I won't flood this question with more code of my own that won't even be read.
How do I search the MediaStore with "LIKE" attributes using a String?
E.G. I type in Shoot To Thrill, I receive song ID with this code:
if(cursor.moveToFirst()){
while(cursor.moveToNext()){
String title = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.TITLE));
String artist = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media.ARTIST));
String id = cursor.getString(cursor.getColumnIndex(MediaStore.Audio.Media._ID));
test.setText(title +" " + artist + " " + id);
}
}
Here is something to begin with:
String[] projection = {
BaseColumns._ID,
MediaStore.Audio.Artists.ARTIST,
MediaStore.Audio.Media.TITLE
}
Cursor cursor = this.managedQuery(
MediaStore.Audio.Media.EXTERNAL_CONTENT_URI, //uri
projection, //projection
//i dont know what to enter,
//i dont know what to enter,
MediaStore.Audio.Media.TITLE);
It's just normal SQL hiding behind the scenes. Normal LIKE operations should work just fine. You can use MediaStore.Audio.Media.TITLE + " LIKE \"%thrill%\"" just like any other SQL query.
String[] projection = { BaseColumns._ID,
MediaStore.Audio.Artists.ARTIST, MediaStore.Audio.Media.TITLE };
String where = MediaStore.Audio.Media.TITLE + " LIKE ?";
String[] params = new String[] { "%life%" };
Cursor q = managedQuery(MediaStore.Audio.Media.EXTERNAL_CONTENT_URI,
projection, where, params, MediaStore.Audio.Media.TITLE);
try {
while (q.moveToNext()) {
Log.e("song", q.getString(1) + " " + q.getString(2));
}
} finally {
q.close();
}

Android get a cursor only with contacts that have an email listed >android 2.0

i have the following code to get contacts from content provider
String[] columns = new String[] {
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts._ID,
ContactsContract.Contacts.PHOTO_ID };
Cursor cursor = managedQuery(ContactsContract.Contacts.CONTENT_URI,
columns, null, null, null);
and i use this one to get the emails for a specific contact by their id:
Cursor emails = getContentResolver().query(
ContactsContract.CommonDataKinds.Email.CONTENT_URI,
null,
ContactsContract.CommonDataKinds.Email.CONTACT_ID
+ " = " + contact.getContactId(), null, null);
my current implementation passes every row in the cursor and aquires its emails and stores them in an arrayList of java objects.
what i was wondering if it was possible to do is just query the content provider and return a cursor of just contacts with ids/name etc that have an email address listed.
this way has a long waiting period for getting the contact list. i am using this list for a list adapter. if i can get only the contacts that have an email i can use a cursor adapter in my list.
Is something like this possible? how can i speed up the process?
#CapDroid
Fixed working code from DArkO's post:
ContentResolver cr = context.getContentResolver();
String[] PROJECTION = new String[] { ContactsContract.RawContacts._ID,
ContactsContract.Contacts.DISPLAY_NAME,
ContactsContract.Contacts.PHOTO_ID,
ContactsContract.CommonDataKinds.Email.DATA,
ContactsContract.CommonDataKinds.Photo.CONTACT_ID };
String order = "CASE WHEN "
+ ContactsContract.Contacts.DISPLAY_NAME
+ " NOT LIKE '%#%' THEN 1 ELSE 2 END, "
+ ContactsContract.Contacts.DISPLAY_NAME
+ ", "
+ ContactsContract.CommonDataKinds.Email.DATA
+ " COLLATE NOCASE";
String filter = ContactsContract.CommonDataKinds.Email.DATA + " NOT LIKE ''";
Cursor cur = cr.query(ContactsContract.CommonDataKinds.Email.CONTENT_URI, PROJECTION, filter, null, order);
Your cursor will have essential IDs as well as names and email addresses. The performance of this code is great because it requests few columns only.
I solved this one, here is how its done:
UPDATE
String[] PROJECTION = new String[] { ContactsContract.RawContacts._ID,
ContactsContract.Contacts.DISPLAY_NAME, ContactsContract.Contacts.PHOTO_ID,
Email.DATA, ContactsContract.CommonDataKinds.Photo.CONTACT_ID };
String order = " CASE WHEN " + ContactsContract.Contacts.DISPLAY_NAME
+ " NOT LIKE '%#%' THEN 1" + " ELSE 2 END, "
+ ContactsContract.Contacts.DISPLAY_NAME + " COLLATE NOCASE";
String filter = Email.DATA + " NOT LIKE '' ) GROUP BY ( " + Email.DATA;
return mContent.query(Email.CONTENT_URI,
PROJECTION, filter, null, order);

Android SQL Null Constant Value

I have this cuestion for you...
We are trying to pass an argument to a query in a content resolver. We want to get all rows if the argument is NULL, or get the specific value indicated at the argument as contrary.
The method we use declares:
static String allArtists = "";
////
Some code
...
Vector<String> discs = new Vector<String>();
discs = getDiscs(allArtists);
////
public Vector<String> getDiscs(String artistName){
So, the query we made is as follows:
Uri discsUri = MediaStore.Audio.Albums.EXTERNAL_CONTENT_URI;
ContentResolver contRes = getContentResolver();
String[] queryColumns = { MediaStore.Audio.Albums._ID,
MediaStore.Audio.Albums.ALBUM,
MediaStore.Audio.Albums.ARTIST };
String selectionQuery = "? = ?";
String [] selectionArgs = { MediaStore.Audio.Albums.ARTIST, artistName };
String sortOrderClause = MediaStore.Audio.Albums.ALBUM + " ASC";
Cursor queryRes = contRes.query(discsUri,
queryColumns,
selectionQuery,
selectionArgs,
sortOrderClause
);
In order to make this method reusable, we pass artistName as argument, and because we want all rows to be selected, we pass the constant allArtists.
The point is that this query returns no rows, because the constant allArtists = "" doesnt act as the null value as we expected.
The question finally is: How must I declare the constant in a way that the query takes it as a NULL value instead of ""?.
Thanks a lot.
Turn empty strings into null
String selectionQuery = "? = nullif(?,'''')";
We resolved our problem making the selection this way:
String[] queryColumns = { MediaStore.Audio.Albums._ID,
MediaStore.Audio.Albums.ALBUM,
MediaStore.Audio.Albums.ARTIST };
String selectionQuery = "( nullif('" + artistName + "','') ISNULL )" +
" OR (" + MediaStore.Audio.Albums.ARTIST + " == '" + artistName + "' )";
String sortOrderClause = MediaStore.Audio.Albums.ALBUM + " ASC";
Cursor queryRes = contRes.query(discsUri,
queryColumns,
selectionQuery,
null,
sortOrderClause);
Hope this helps anyone else.
Greetings!

Categories

Resources