Develop Reference

Realm Android run query of if field contain value in a List<String>

This is My RealmObject:
public class Channel extends RealmObject{
private String id = "";
private String name = "";
...
I am trying to construct a query where each string in a list of string contains (not equal) to the "name" field.
I am aware I can use the in() method with a ArrayList, but the in() method validate if the string EQUALS and rather need CONTAINS.
I have tried the following:
realm.where(Channel.class).rawPredicate("name CONTAINS[c] $0",list.toArray()).findAll() This perform the query only on the first String in "list"
realm.where(Channel.class).in("name", list.toArray()).findAll() is performing there search only if the field "name" EQUALS to any of the Strings in the list, where I need it to search if the field CONTAINS any of the values in the List of Strings
Any ideas of how to use a method just like in() but that will compare if the string equals or contain the field value?
Thanks

try this
RealmQuery<Channel> tasksQuery = realm.where(Channel.class).beginGroup();
for(String name: names){
tasksQuery.equalTo("name", name)
}
tasksQuery.endGroup().findAll()

ORMLite - How to return all rows where a column contains some String?

I have an android application that is currently using the ORMLite library. Currently, I have a database table let's say X, which contains a column for the Id and another column, say Column Y. Column Y is intended to store strings like "AppleBananaCinnamon" (imagine like a very long string of keywords). My goal is to retrieve all the ID's that contain a specific query which could be something like "bana" which would return all the rows where "bana" appears in Column Y. How could I do this?

You can use ORMLite's Querybuilder and its where and like functionalities.
E.g.
PreparedQuery preparedQuery = databaseContext.<DAO Name>().queryBuilder()
.where().like(<column name>, "bana").prepare();
List<tableName> objName = databaseContext.<DAO Name>().query(preparedQuery);
Database context code snippet:
private Context _context;
public DatabaseContext(Context context)
{
_context = context;
}
public SQLiteDatabase open() throws SQLException
{
...
}
and so on.

Execute Query in android searching if a string is contained inside the string inserted in a column

I have a database in an android app and the following are its columns:
public class DBhelper extends SQLiteOpenHelper {
public static final String COL_TIPO = "ColonnaTipo";
public static final String COL_DIFFICOLTA="ColonnaDifficolta";
public static final String COL_INGREDIENTI = "ColonnaIngredienti";
//code
}
I use this function to make a query on it (TAB is the name of the table):
public Cursor query_filtri(String[] param, String[] p2) {
String whereClause="";
String[] whereArgs=new String[50];
whereClause=COL_TIPO+"=? AND "+COL_DIFFICOLTA+"=?";
whereArgs=new String[] {param[0],param[1]};
return getWritableDatabase().query(TAB,null,whereClause,whereArgs,null,null,null);
}
In param[] there are the values of COL_TIPO and COL_DIFFICOLTA that i am searching, and it works.
In p2[] there are 2 strings: p2[0] = "hi", p2[1]= "try".
I would modify the query to obtain the colums that in COL_INGREDIENTI contains the worlds hi and try.
For example:
I would try to obtain this
COL_INGREDIENTI "hi, would you try?"
and not this
COL_INGREDIENTI "hi, how are you?"
How can i modify the query? Is there a way to make it not case-sensitive?

You can add:
AND COL_INGREDIENTI like '%hi%' and COL_INGREDIENTI like '%try%'
From the documentation:
The LIKE operator is case sensitive by default for unicode characters that are beyond the ASCII range. For example, the expression 'a' LIKE 'A' is TRUE but 'æ' LIKE 'Æ' is FALSE
So, if you are using characters inside de ASCII range you don't need to worry about the case

Adding data to SQLite

I'm creating my first data enabled app but am struggling with the last part - actually adding and retrieving the data. For now I am only concerned with adding data to the table. Following this tutorial I have created model classes for my tables and a DBHelper class with all my CRUD methods (I can post all these if required but not sure they are necessary to answer this question. Please correct me if I am wrong!). Unfortunately the tutorial ends here and doesn't go into detail on how to pass the data from the UI of the app into the DB.
After some Google searches I have found an example of how to pass some data to these methods but only how to pass one piece of data at a time, so only really useful if my table has just one field - mine has more than one.
For example, if I have a a table for "Todo" tasks, in my dbhelper my create method may be;
public void createTodo(String todoText) {
ContentValues contentValues = new ContentValues();
contentValues.put("todo", todoText);
// Insert into DB
db.insert("todos", null, contentValues);
}
so from my activity I just need
dao.createTodo(todoTextValue);
For my app I will be adding more than one field at a time, so my create method looks like this;
public long createSite(Site site){
SQLiteDatabase database = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_SITE_NAME, site.getSiteName());
values.put(KEY_SITE_LAT, site.getSiteLat());
values.put(KEY_SITE_LON, site.getSiteLon());
values.put(KEY_CREATED_AT, site.getSiteCreatedDateTime());
// Insert Row
long siteid = database.insert(TABLE_SITES, null, values);
So my question really is how I can pass all the different bits of data to the createSite method.

I don't know if this really needs an answer, but well here's a code...
Assuming your Site class is like this.
public class Site {
private String siteName;
private double siteLat;
private double siteLon;
private Date siteCreatedDateTime;
// getters and setters here
}
You then pass the data from your EditText value to your new Site object. It will look like this in your activity.
EditText siteNameInput = (EditText) findViewById(R.id.siteNameInput);
EditText siteLatInput = (EditText) findViewById(R.id.siteLatInput);
EditText siteLonInput = (EditText) findViewById(R.id.siteLonInput);
EditText siteCreatedDateTimeInput = (EditText) findViewById(R.id.siteCreatedDateTimeInput);
String siteName = siteNameInput.getText().toString();
String siteLat = siteLatInput.getText().toString();
String siteLon = siteLonInput.getText().toString();
String siteCreatedDateTime= siteCreatedDateTimeInput.getText().toString();
Site site = new Site();
site.setSiteName(siteName);
site.setSiteLat(siteLat);
site.setSiteLon(siteLon);
site.setSiteCreatedDateTime(siteCreatedDateTime);
dao.createSite(site);
Hope this helps you... You can learn more on Object-Oriented programming in Java here

public long createSite(Model site,String name, String address){
SQLiteDatabase database = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_NAME, site.name);
values.put(KEY_ADDRESS, site.address);
// Insert Row
long siteid = database.insert(TABLE_SITES, null, values);
to add elements to the class you just add
public class Model {
String name;
String address;
//add year as many as you need
Model(String name, String address){
this.name=name;
this.address=address;
}
}
And in you activity you call this
In java to add a new object in this case Model
Model x = new Model("josh","Ireland");
and you just pass to
dao.createTodo(x);

Todo and Site are models. Each variable represents a column of that table. You need to create a custom model for each of your tables. The createSite method takes an object of type Site and adds it as a row in the TABLE_SITES in the DB. values.put(...)takes columnName, value. So here you give your own column names and values.
Instead of getting into all this I suggest you use an orm like active android:
http://www.activeandroid.com/

Using a string to pass to adaptor instead of a string

I'm trying to pass a string from Mainactivity to the databaseadapter class to update the column one with a string (as its designated with string instead of int) in sqlite but realize that db.update() only works with int.
a) In mainactivity, for int
Integer jacky = 78;
myDb.updateK(jacky);
b) In mainactivity, for String
String jackie = "jacko";
myDb.updateK(jackie);
In databaseadapter
String cup = "_id = 1";
//since jack doesn't have to be jacky or jackie, and can be mary
public void updateK(int mary){
ContentValues tree = new ContentValues();
tree.put("columnone", mary);
db.update("TableOne", tree, cup, null);
}
In the case above, only case a) works when using an int whereas case b) using a string jacko, does not work. Is there a way to work around this and pass the string from mainactivity to databaseadapter?
As you probably can tell, I'm new to android and I appreciate any pointers you guys can give me.

a) In mainactivity, for int
Integer jacky = 78;
myDb.updateK(jacky);
b) In mainactivity, for String
String jackie = "jacko";
myDb.updateK(jackie);
In databaseadapter
String cup = "_id = 1";
//since jack doesn't have to be jacky or jackie, and can be mary
public void updateK(Object mary){
ContentValues tree = new ContentValues();
tree.put("columnone", mary);
db.update("TableOne", tree, cup, null);
}
NOTE : Your tree should also accept objects

"columnone" should be a column name of table "TableOne". Verify the type of that column (you should define column data type when define your table). According to your question it should be a INTEGER type. If so you can change its type to TEXT then you have to change the case a) as follows.
myDb.updateK(String.valueof(jacky));