Android :: Saving ArrayList In SQLite Database In Android

Jun 29, 2010

I've been working with SQLite on android and I would like to add an arraylist to a column in a table, and then fetch the data back as an arraylist. The arraylist is a list of Longs. I've noticed that SQL has an option for storing BLOBS, however, it looks like I need to convert the array list to a byte[] first before being able to store it as a blob in my SQLite database. Is there any other option for saving my array of data, I should consider?

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Android :: Saving An ArrayList (String) State In SQLite Database

Jul 9, 2010

I'm working on a android application that will display Strings to the user, and the user then has the option to add one to a favorite list. I have searched and searched and cannot find the proper way of doing this. I did get one open source project, everything worked until the user removed a favorite. The database would clear the row of data, but when a new row is added, it would behave as if the deleted row still had data, leaving blanks in the favorite list.

This is my insert method
public long insertString(String newString)
ContentValues newStringValue = new ContentValues();
newStringValue.put(KEY_STRING, newString);
return db.insert(DATABASE_TABLE, null, newStringValue);

The long returned will always increment even if i use the remove method:
public boolean removeString(long _rowIndex)
return db.delete(DATABASE_TABLE, KEY_ID + "=" + _rowIndex, null) > 0;

If I try to remove the third index, and the user removed a question at the third index, the method returns false, is there a way to completely remove all rows with no data?

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Android :: Insert ArrayList In To Droid SQLite Database?

Sep 15, 2010

I have array list of geopoints

List<GeoPoint> geoPointsArray = new ArrayList<GeoPoint>();

I want to put geoPointsArray array in to SQLite database and then fetch the data back as an array.

Now I use ContentValues for insert into array as:

ContentValues initialValues = new ContentValues();
initialValues.put(KEY_TIME, time);
db.insert(tableName, null, initialValues);

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Android :: Saving Image Loaded Through URL Into SQlite Database

Aug 6, 2010

I need to know how to save image loading through URL has a original image in sqlite database.how can i convert image URL into binary format and to retrieve original image from database.

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Android :: Saving State Of ArrayList Of Custom Objects

Aug 12, 2010

I have a member variable in my Activity which is an ArrayList. The objects populating this Array List are objects I have defined called Rating Item. Rating Item has several member vars like rating, comment, ID, etc. I would like to save this Array List in onSaveInstanceState so it can be repopulated from onRestoreInstanceState. What is the best way to do this? I've never saved the state of an object of this complexity.

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Android :: Saving ArrayList Of User Defined Objects

Aug 10, 2010

I am working on an application where I am saving the state of an application in an ArrayList. Now, to save this state, I tried to use Serialization. But, somewhere in the user defined object, I am using Button, which is not letting me serialize the entire object. I wanted to know, is there any other way of saving this array list between onPause and onResume? I even tried onSaveInstanceState, but it doesn't have support for Array List.

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Android :: Saving ArrayList To Txt File / Data Folder Empty

Apr 25, 2010

I am trying to save an arraylist to a .txt file below is the code I am using, which runs without error but when I try to go to Astro file manager and browse the data folder there is nothing there.

String filename = stationname.getText().toString() + System.currentTimeMillis();
FileOutputStream fos = openFileOutput(filename,Context.MODE_PRIVATE);
ObjectOutputStream out = new ObjectOutputStream(fos);
out.writeObject(report);
Report is the ArrayList that holds each of my station Reports.
out.close();

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Android :: Arraylist Storage In SQLite

Nov 16, 2009

Can any one tell me how to store and retrieve arraylist in/from sqlite.
ArrayList<Double> results = new ArrayList<Double>();

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Android :: Full Android Database Class For Existing SQLite Database?

Aug 23, 2010

I'm trying to deploy an application with an existing SQLite database.I've been reading though the examples that are posted but they are always missing some part of the class. I feel like I'm trying to bake muffins but no one told me to use baking powder.Can someone post a full database helper class for depoying an SQLite database on Android? Edit : Delete old code because it doesn't work.

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Android :: Synchronizing Sqlite Database On Android To A Sybase Database On Server

Apr 12, 2010

I'm currently developing a Field-Service application that stores data in the local sqlite database on an android device. At some point, usually after completing the data collection rounds, the local sqlite db is to be synchronized to a remote sybase db on the server.Any suggestions as to how this could be achieved or engineered as a solution? Or even better, are there alternatives to synchronizing data in such an application?

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Android :: Using My Own SQLite Database

Feb 13, 2009

I'm new to Android, I just finished the Notepad Tutorials, where we can create SQLite Databases to save notes. So I wanted to know if it was possible to "import" my own SQLite database (not created with my App but with a 3rd-party software) to my project, and if the answer is yes, where should I save my SQLite databse and how can I have access to it.

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Android :: Database - XML Or SQLite?

Mar 25, 2010

I'm doing a application that will use a database with serialized object. The objects will be already serialized and the user will just display things. On a PC I would just make an XML but with android I'm not sure. Can I make an XML and "unpack" it when the user launch the application for the first time or should I do something else?

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Android :: Use Own Sqlite Database?

Mar 5, 2010

I put my database field in "assets" folder. And use the code from this blog to copy the database to "/data/data/my_packname/databases/", (This copy code i run it in the onCreate() method when i run this app) then use select * from ... to get data. But it gives me the exception: no such table. Someone told me that if i am attempting to copy the file in SQLiteOpenHelper's onCreate(), it's too late. So the copy file code can not copy the complete file. So i need to use adb or ddms to pull the database first? So, Anyone can teach me how to use my own databse?

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Android :: How To Add Objects To Sqlite Database?

Nov 18, 2009

I have a class like class My data{ String name; int data; Location[] locality.

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Android :: Creating Database In SQLite

May 23, 2009

I am new to android and I have a problem in creating a database.

public class database extends ListActivity {
/** Called when the activity is first created. */
private final String MY_DATABASE_NAME = "myCoolUserDB.db";
private final String MY_DATABASE_TABLE = "t_Users";
Context c;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ArrayList<String> results = new ArrayList<String>();
setContentView(R.layout.main);
SQLiteDatabase mydb=null;
try
{
mydb.openOrCreateDatabase(MY_DATABASE_NAME, null);

} catch(Exception e){}
}}

When I run this code it throws a run time exception.

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Android :: Delete The Sqlite Database?

Mar 23, 2010

How do I delete the sqlite database exists in my android? There is a db behind my android qro and delete the same

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Android :: Delete Top Row In SQlITE Database

Aug 2, 2010


public void delete(String id, String name, String phonenumber, String time, String message)
{
String[] args={id};
getWritableDatabase().delete("texts", "_ID=?", args);
}

It works fine, and deletes the specified row. However, I also want to implement it so that I can delete the most recent (earliest date) entry in the database, which should be at the top of the table. I know I can do this by altering the last 2 parameters of delete, but I cannot figure out what to change them to.

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Android :: Update SQLite Database From Other App

Jan 25, 2010

Is possible update the records from SQLite  from my Android  Application1 from other Application2 Android

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Android :: UI Can Connect To SQLite Database?

Jul 31, 2009

Is there any UI can connect to SQLite database? I hope that I can read the data without writing code.is there any method can make it happened?

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Android :: Necessary To Close SQLite Database?

Jul 22, 2010

Is it really necessary to close an SQLite database that your activity has opened (database is in local memory or on SD card)? I would think it would be good practice, but I noticed that the Android samples such as the Notepad tutorial and SearchableDictionary sample do not do this. I've also seen sample code where the database is consistently opened, read from, and closed, but that would seem to add unnecessary overhead.

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Android :: Query SQLite Database

Jun 2, 2010

I successfully created the Database and inserted a row however I cannot Query it for some reason. My Droid crashes everytime.

CODE:...........

I get this exception

No such column: value: , while compiling: SELECT DISTINCT value FROM mainTable

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Android :: ORM SQLite And Database Scheme

Jun 4, 2010

I'm looking for a very simple ORM framework working on Android for sqlite. I've been testing activeAndroid but none of the example could ever build on Eclipse. By the way, how do guys implements a "many to many" relationship in sqlite for android ? How do you reflect the cascade regarding deletion of rows and guarantee the database integrity?

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Android :: SQLite DROP Database

Jul 14, 2009

How to drop a database in Android SDK?

Did not see any methods in android.database.sqlite.SQLiteOpenHelper or android.database.sqlite.SQLiteDatabase classes.

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Android :: Loading SQLite Database Into App

Jun 10, 2010

I am able to create, write and read an SQLite Database in my Android App. I have a copy of the Database that is fully populated with data, and I want to get that data into the App's Database. Is it possible to access my populated database from inside my App? Or can I at least create a copy of the populated database and then use that copy? Or do I need to do a .dump and put all the inserts into the Android code?

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Android :: Use The Exist Sqlite Database?

Mar 16, 2010

I have a sqlite database, and i put this file in "assets" folder. The code like below, Pls help and tell what's wrong in this code, How to use my own sqlite database.

CODE:.............

The error message:

CODE:.................

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Android :: Access A Sqlite Database That Is Not Own By My Application

Jan 31, 2010

I'm searching information about how i can access a specific database that to not belong to me, and that is store in /data/data/com.... directory is it possible without root access? it it possible with root access, and how?

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Android :: Prevent Access To SQLite Database

Oct 18, 2010

I use a sqlite database in my project. The stored data in it must not be available for the user to edit. As I've read here I saw that if you have root access you can alter sqlite database. The only solution would be to encrypt database content, but this would be time consuming for device. Any solution to prevent access to database ?

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Android :: SQLite Database Slow Insertion

Aug 17, 2010

I need to parse a fairly large XML file (varying between about a hundred kilobytes and several hundred kilobytes), which I'm doing using Xml#parse(String, ContentHandler). I'm currently testing this with a 152KB file.During parsing, I also insert the data in an SQLite database using calls similar to the following: getWritableDatabase().insert(TABLE_NAME, "_id", values). All of this together takes about 80 seconds for the 152KB test file (which comes down to inserting roughly 200 rows).When I comment out all insert statements (but leave in everything else, such as creating ContentValues etc.) the same file takes only 23 seconds.Is it normal for the database operations to have such a big overhead? Can I do anything about that?

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Android :: How To Use SQLite Database? (Create / Open)

Apr 18, 2010

I am trying to use

SQLiteDatabase.openDatabase( "/data/data/edwin11.myapp/databases/myapp.db", null, (SQLiteDatabase.CREATE_IF_NECESSARY | SQLiteDatabase.NO_LOCALIZED_COLLATORS));

To create/open a database instead of making use of the SQLiteOpenHelper (because I want to pass in the flag SQLiteDatabase.NO_LOCALIZED_COLLATORS. However, I am getting this exception for that line of code:

04-18 09:50:03.585: ERROR/Database(3471): sqlite3_open_v2("/data/data/edwin11.myapp/databases/myapp.db", &handle, 6, NULL) failed
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): java.lang.RuntimeException: An error occured while executing doInBackground()
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at android.os.AsyncTask$3.done(AsyncTask.java:200)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:234)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:258)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at java.util.concurrent.FutureTask.run(FutureTask.java:122)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:648)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:673)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at java.lang.Thread.run(Thread.java:1060)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): Caused by: android.database.sqlite.SQLiteException: unable to open database file
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at android.database.sqlite.SQLiteDatabase.dbopen(Native Method)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1584)
04-18 09:50:03.665: ERROR/AndroidRuntime(3471): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:638)...

Doing some testing just before that line of code (using File.isExists) shows that the file /data/data/edwin11.myapp/databases/myapp.db does not exist. Would that be the cause of the error? (Or am I just using SQLiteDatabase.openDatabase the wrong way?) Would it help if I create the file beforehand? (Shouldn't that be taken care of by the SQLiteDatabase.CREATE_IF_NECESSARY flag that I passed in?) If creating the file manually is the way to go, is it just an empty file, or do I have to write something to it?

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Android :: Sharing SQLite Database Between Activities

Jun 24, 2010

I'm in the middle of writing myself an app and have run into a problem concerning the use of the same SQLite database within multiple activities.

I have one activity that is used to input and store data and multiple activities that need to then read that data.  Within the first activity, it has no problem inputting the data into the database, but when I go to have the other activity read the data, it tells me the database is empty.  Obviously I'm doing something wrong in my handling of this shared database.

Right now, I have a DataHelper class that handles everything.  In each activity, I create a DataHelper object which then calls the openOrCreateDatabase() method.  I then close the database upon exiting the activity.  Obviously this isn't the right way to do it.

So, my questions is, what is the correct way to set up an SQLite database in an Android application and then access it in multiple activities?

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Android :: Populating Spinner From SQLite Database

Feb 3, 2010

I'm attempting to make a dynamic drop down that will be filled by a SQLite table. I have a Cursor object which I can pull the data I need from. I've been able to accomplish loading the values into the drop down with the code below:

CODE:..............

My problem is that I need the a selection from the drop down to also contain the RowID of the item selected. I need to be able to select one item and have access to the value of that item in the back end. For example, think of a drop down in HTML. Each drop down selection has it's own hidden value that is pulled. I need this value to be hidden for me to allow me to know which ID they choose.

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Android :: Can I Autoincrement Foreign Key In Sqlite Database?

Nov 13, 2010

Can we autoincrement the foreign key in sqlite database?

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Android :: Using Custom File For Sqlite Database

Feb 5, 2010

Is it possible to choose a custom location for the sqlite database file? If possible I want to store the database file in the memory card. And if user switches from one memory card to the other I want my application to use whatever version of the database file available on the card.

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Android :: Sqlite Opening Database Crashes

Sep 11, 2010

I have two classes, my main class and another for handling sqlite. The problem I have is that it crashes when it gets to db.open() in the main class and I have no idea why.main class

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Android :: Put Static Data Into SQLite Database?

Jun 8, 2010

If I have a bunch of data that is never going to change (eg. an English language dictionary or the rgb values of a couple hundred color names), how do I use an SQLite database to store it? I know a database is faster than loading everything into memory when the app starts, but how do I make the database either the first time the app runs or "before" the apps ever runs?

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Android :: Maximum Size Of SQLite Database

Aug 14, 2010

I have a SQLite db that size is over 2.6 GiB. (The db contains maps.)

This db is used by RMaps app. When move the maps to some parts at maximum zoom, the app suddenly closes.

However, there is no force close message, no report button. So, I've got an idea that it is caused by reading blocks that are beyond a certain limit e.g. max(int). Since RMaps is just using simple SQL statements, I think that the problem is not in RMaps but rather in Android SQLite driver.

Is there a size limit of SQLite database on Android?

(I have Froyo on Nexus One, but I do not think that this is just a problem of Froyo.)

UPDATE: Log output:

CODE:.......................

UPDATE2: The SQLite db is stored on SD card, there is enough space.

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Android :: How To Browse SQLite Database On Phone?

Jun 7, 2010

How can I browse the SQLite database that I am creating in my app on my Android myTouch phone?

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Android :: Data Not Inserting In Sqlite Database

Aug 14, 2010

I am an android application developer. I am developing an application which requires of me to use Sqlite database. I have implemented fetching the data, but i am facing problems when i try to insert data into the Sqlite database. The problem that i am having is that the new data i enter is not fetched, i.e nothing is new is being entered into the database.

this is the method i wrote in Data.java
myDataBase is an object of SQLiteDatabase
public void insertTitle(String Recipe)
ContentValues initialValues = new ContentValues();
initialValues.put(COLUMN_NAME,value);
myDataBase.insert(ZRECIPE, null, initialValues);
}
and i create an object "d" of it in Add.java, where i call the "insertTitle()" method. But nothing is inserted.

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Android :: Inserting Rows In SQLite Database

Nov 19, 2010

I am trying to insert rows into my database, but nothing gets persisted. Here is my helper class:

package com.android.cancertrials;
import java.util.Calendar;
import java.util.GregorianCalendar;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;..................

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Android :: Copy A SQLite Database From The Device To Your PC

Mar 22, 2010

I have a app in development.  It write data to a SQLite database.  I've tested the app on my NexusOne over the weekend and have a bunch of data now in the database.  I'd like to copy the database off of the phone and onto my dev machine.

I've tried to use adb pull <path to mydatabase> <path to my local machine> but it gives me a Permission Denied error.

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Android :: Where Does Emulator Store SQLite Database

Oct 2, 2009

I'm working on an Android application that stores data in a SQLite database. My question is, where does this database file get stored on the filesystem when you're using an emulator?

I have seen that it's stored in /data/data/package_name/databases

But I need to know where on my local machine's hard drive that actually maps to. The database persists on multiple runs of the emulator, even after having shut down the machine, so it can't just reside in RAM...

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Android :: Rename Column Sqlite Database?

Oct 12, 2009

I have a database that I download external and save on my sdcard. But this database is also used for an iPhone app and has a column id and not _id (sqlite uses _id). How can i rename this column to _id?

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Android :: Can't Insert Text Into SQLite Database / How To Do

Nov 17, 2010

I'm trying to insert text into my SQLite database, but for some reason it doesn't work. It never executes..

Code below (this is my function that I'm calling):

public void setInfo(final String tableName, final int id, final String title, final String time, final String content) code...

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Android :: Storing An Object Into A SQLite Database

Aug 10, 2009

I need some help to store a Object in an SQLite database using Android.I don't know whether it is possible or not.If it is possible means please give some code snippets to create a table which can store an object.

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Android :: Creating SQLite Database In Phone

Jun 14, 2010

I want to create a SQLite database in my app, which contains three tables, I will add data into tables and will use them later on.but I like to keep database ,as if when app is first time installed it checks whether the database exist or not, if exists it updates it else if not then creates a new database.further more I am making a DB class to facilitate my app,so I wont be creating an activity for my database creation.if there are possible advices, please share with me

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