Develop Reference

How to search in android sqlite database with speedy way?

i tried to search in the sqlite database using the below code :
Cursor cusror;
cursor=db.rawQuery("SELECT * FROM "+ Contactsnew.TABLE02 + " WHERE "
+ Contactsnew.userid + " = " + Contactsnew.userId + " AND " +
Contactsnew.TITLE +
" LIKE '"+search.getText()+"%'");
its working successfully , but in huge database its working slowly. i searched the last days to find third library to work with my own database (Copied from assets to sqlite database) .
i find top five libraries in this article i followed each library but what i find each database is working only with the database that created by itself not with existing database (Already copied from assets).
any help to use any of these library and refer it to my own database or any another library to help me .
Thanks

I suggest creating prepared statements and re-use them. There is an excellent answer on Stack Overflow how to do that. Consider reducing the columns returned by the query, if not all columns are needed. Further, consider creating indexes for relevant columns. test would be the table name and id a column name:
CREATE INDEX idx01 ON test(id);
As a last resort it might be worth trying to remove the LIKE completely and to the regex test while iterating over your cursor.

You have to make sure existing database has the same format of data as new database you adding.
Probably, the simpliest solution here - write some 'migration utility', which will extract existing data and save it to new database.
To speed up queries store different aspects of data into separate tables (not everything in single table), or, if your data has many dependencies, try noSql database (Realm) which not using tables.

SQLite Database - Create new tables and set Table name through a popup

I am creating an app blocking Application and would like to know a few things:
How to load a list of installed apps into a database table.
Create a new table within the database and set the table name
through an EditText field or an AlertDialog.
Call in selected apps into another activity
List of apps needs to have a CheckBox next to them to select which
apps to carry over to another
Completed Events
I have already managed to populate a ListView with all the installed apps.
I've set up an AlertDialog with everything I need so far, just need
to know how to link that to create a new table and set the entered
text as the table name.
All layouts have been created and set up to accommodate everything,
the problem just lies with the database and calling everything in
I hope I've provided enough details or if this makes any sense at all. Thank you in advance and I hope someone will be able to help me with this problem. If needed I can post segments of my already existing code to make things easier?

For using a Android Database, I recommend to follow this tutorial:
Android | Simple SQLite Database Tutorial
After this tutorial you will understand how the android database works, how you can create tables:
#Override
public void onCreate(SQLiteDatabase db) {
// SQL statement to create book table
String CREATE_BOOK_TABLE = "CREATE TABLE books ( " +
"id INTEGER PRIMARY KEY AUTOINCREMENT, " +
"title TEXT, "+
"author TEXT )";
// create books table
db.execSQL(CREATE_BOOK_TABLE);
}
And how to
addItemsToDatabase(Object object)
getItemsFromDatabase(int id)
getAllItemsFromDatabase()
updateItemInDatabase(Object object)
deleteItemFromDatabase(Object object)
When you know all this you can create own methods to use!

Am I understanding how to import my .csv file into sqlite?

I currently have a .csv file with several unlabeled columns of data, which to my knowledge translate to the following datatypes in sqlite:
datetime (in the format 7/19/2011 12:00:00 PM) -> numeric
double -> real
char(1) -> text
float -> real
I can create the database by doing the following:
sqlite> create table myTable (myVar1 numeric, myVar2 real, myVar3 text, myVar4 real);
sqlite> .separator ","
sqlite> .import myFile.csv myTable
Then I copy and paste the newly created myTable.db into the "assets" folder in my project in eclipse. I make a DatabaseHelper class that extends SQLiteOpenHelper, and then I can start using and reading from the database in my Android project.
Am I getting this right? I've never used a database before and I've seen so many vastly different instructions on doing this. Some of my questions are-- do I have to label the columns of my .csv file? Is my .csv file not "simple" enough to just use .import and I'll need to find a program to translate it? I've come across sites saying that I need to rename something (which I don't seem to have) to "_id", and I don't know what this is, where this is, or how to do this, or if it's even necessary, or what it's for. What else am I missing?

I think you are getting it "right" except for that first datetime column. You should use the TEXT type, not a numeric type.
Also, you can inspect your data after the import to see if all is well, especially with that datetime field:
SELECT * FROM myTable ORDER BY RANDOM() LIMIT 10;
UPDATE
In response to the OP's last comment: my understanding of how you store date(time) is that it depends on your context. So if the date in the flat file is in the format "7/19/2011 12:00:00 PM", then without any transformation it'll be imported as TEXT anyway.

Importing csv into database is 15 lines of code task and it gives you more control over this process.
Table columns names like "var3" are just terrible, however there is no need to rename it in database you can just use sql aliases:
select myVar1 _id, myVar2 from myTable
_id is common name for primary key column of table (it's usually numeric column witch must be unique). Every ADK class using datastore assumes relays on it, so it's nice to use this convention.
If you just want read only database you can prepare db locally and find some tutorials how to include it into your app.

Android SQLite, some SQL basics

I am following this tutorial: http://www.codeproject.com/KB/android/AndroidSQLite.aspx
I must be overthinking this SQLite stuff (in the past my domain server would automatically initialize databases I requested, and I could do queries when desired. never put one together from scratch)
I have some questions about their onCreate function. I never recall using a
CREATE TRIGGER command in my SQL
I only need to create one table with 2 or 3 columns (if you count the primary key)
I should just be able to do
db.execSQL("CREATE TABLE" + tableName +"("+colID+"INTEGER PRIMARY KEY,"+columnName+"TEXT)");
correct?
Do I need a "Trigger" and a "View" ?

If you just need a place to store some data - then Table is enough. But if your logic is more complicated then you'll need additional stuff. Also note that some Triggers are not supported by SQLite: Info from here

You not need to create TRIGGER. Unless it is required. Here is how I implemented in one of my project. Hope this help.
https://github.com/gopalB/FeedReader/blob/master/src/com/feedReader/provider/FeedDB.java

If you do not need a Trigger or a View, then you do not need to create them. It appears that the tutorial is just explaining some of the things you can do.

if SQLite TRIGGER and VIEW are similar to what they're used for in MySQL then no, they are not necessarily for what you're trying to accomplish.
VIEWs are useful when you have complex queries (like when using JOINs to join data from multiple tables).
TRIGGERSs are conditions that are run when you modify a table. (like using UPDATE, or INSERT)

As written, your create statement won't work because of a lack of whitespace. Try:
db.execSQL("CREATE TABLE " + tableName +" (" + colID + " INTEGER PRIMARY KEY, " + columnName + " TEXT)");

Is there an easy way to import data into SQLite?

At the moment I am having to write out each query to insert data into the database separately.
Is there a way I can import a spreadsheet or anything else and end up with this form.?
Is there an auto-increment feature like in normal MySQL?
db.execSQL("INSERT INTO " +
SAMPLE_TABLE_NAME +
" Values ('3','" +
"Question'," +
"'Answer1'," +
"'Answer2'," +
"'Answer3'," +
"'Answer4'," +
"'Correctanswer'," +
"'Reason');");

Also is there an autoincrement feature like in normal Mysql?
Yes. Take a look at: http://www.sqlite.org/autoinc.html
With regards to your original question; for those cases I better create the database and the initial data in my computer using any of the Sqlite DB Managers out there. Then, I put the database inside the assets directory of the project and instead of creating the database the normal way, I copy the database from there to the handset. This like could be helpful in that case:
http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/

If you can use the SQLite Command Line Shell to prepare your database, you can .import into a table from a file
If your data is (contained in) a spreadsheet, consider using the spreadsheets scripting/macro language to export table(s) INTO a SQLite database
For lots of tables preparing a master database and attach-ing to that from your app may be more efficient and could be done on the handset only
wrt to autoincrement, look at the autoincrement faq too

If I understand, you want to initialize your database with some values, but you don't want to hardcode each query.
In this case you should use JSON to store your data in an external file (like a spreadsheet), then parse this file to get your data and use it to generate your SQL queries.
Here is a tutorial on how to use JSON in android apps.