I create a database. In this datebase create 3 lines. When I using this database in Android i get this error:
12-18 10:30:10.882: INFO/Database(477): sqlite returned: error code = 11, msg = database corruption found by source line 40107
12-18 10:30:10.882: INFO/Database(477): sqlite returned: error code = 11, msg = database disk image is malformed
This error is obtained, when I do: Select or Insert. How to solve this error?
Delete your app from emulator then install it again, this will create a new database.
EDIT:
Make sure you have a table named android_metadata with a column locale (TEXT), put a string in it (en_US)
A little trick that i do is to create the database normally in the application, I populate it, then i retrieve it from emulator using DDMS or adb (from /data/data/mypackage/databases/nameofthedatabase), and then I put it in the assets. This way I can be sure the database is valid.
Or you can create it in the application, retrieve it, then populate it or modify it (I use sqlitebrowser in linux, works beautifully), then I put it back in /data/data/mypackage/databases/nameofthedatabase, or in assets and copy it there.
Related
I am using Sqlite database in one of my Android project. It works fine in all the devices except One Plus Two device.
I am getting exception while trying to open the database. This is the crashlog.
12-23 19:14:35.235: E/SQLiteLog(3133): (11) database corruption at line 53216 of [9491ba7d73]
12-23 19:14:35.235: E/SQLiteLog(3133): (11) statement aborts at 7: [SELECT locale FROM android_metadata UNION SELECT NULL ORDER BY locale DESC LIMIT 1]
12-23 19:14:35.237: E/SQLiteDatabase(3133): Failed to open database '/data/data/com.mycompany.myapp/databases/alcochange.sqlite'.
12-23 19:14:35.237: E/SQLiteDatabase(3133): android.database.sqlite.SQLiteException: Failed to change locale for db '/data/data/com.mycompany.myapp/databases/myapp.sqlite' to 'en_US'.
Please click here to see the full crash log
I have seen other questions like that here, I have tried almost every answers, but nothing works.
I have tried this and this.
EDIT: The device runs on Oxygen Lollipop.
I can't find the reason why I am having this error, but somehow I have avoided this by doing the following.
Previously, I had a .sqlite database in the bundle and when the user open our app for the first time, I copied the .sqlite database from the bundle to the correct path.
But now, I have exported the raw queries from the .sqlite and added it with the bundle as a txt file. Now when the user opens the app for the first time, I will first create an empty .sqlite file in the path and then I read all the .sql queries from the txt file from the bundle and execute them over the .sqlite file in the path.
Try to change locale manually.
Open your database file with a SQLite editor such as SQLiteStudio, then open android_metadata table. if it does not exist, create it. (you may create it with the query editor (tools>open query editor) and copy/paste the DDL code below)
CREATE TABLE android_metadata (
locale TEXT
);
for inserting the record you may copy/paste this line in the query editor:
INSERT INTO android_metadata VALUES ('en_us');
Hint: to run the query in SQLiteStudio you should push the button with icon in the toolbar.
I am using sqlcipher database. I am tracking the lastModified time of my database. According to my understanding long value returned by lastModified() function will change only if we update or add a value to the database we refer. I am using a query to fetch (not modifying) a value from the database, for this i am using the below code
mDatabaseFileObj = mContext.getDatabasePath("xxx.db");
Log.i(""," "+mDatabaseFileObj.lastModified());
mSQLiteDatabase = net.sqlcipher.database.SQLiteDatabase.openOrCreateDatabase(...)
Log.i(""," "+mDatabaseFileObj.lastModified());
mCursor = mSQLiteDatabase.rawQuery(query, null);
do{
....
}while(..)
In this i had printed two logs. First log before creation of mSQLiteDatabase obj and another log after that.According to the doc for lastModified() both the values printed by the logs should be same as i just quering not modifying the database. But the value is changing.
I couldnt sort out this problem.Give your thoughts on this.
An addtional info is, i had placed this code snippet in a function and i am calling that function 5 times and strangely for the first time alone the log is printing different values but for the rest 4 times the log printed values are same..
Thanks in Advance
Deepak,
openOrCreateDatabase is not a read only operation. In particular the wrapping library, which is based on the Android sqlite library, manipulates a table called android_metadata when the database is open. This could cause the timestamp to change, because the database is actually modified during open.
mDatabaseFileObj this is reference to your File object from OS don't confuse this with database in SQLITE database are implemented on top of file system only, so in first line you are printing when this file was last modified,
while second line you are trying to alter the file, and third line again printing time, so as per me and going with file systemn behaviour you will get a different time stamp, this doesn't mean if content inside this file was modified or not.
Just imagine it like this, open a txt file in windows and save it again without changing it notice time before and after they will be different.
Hope this help.
Hi im trying to read sqlite file which is placed in assets/databases folder
i followed this link to read data from sqlite file
http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/
im getting error
no such table : while compiling
SELECT _id, name, address FROM
stores
Is there any permission i need to write in manifest to read sqlite file data?
Please let me know how i can solve this issue. Or else please give me any reference link to follow.
Thanks in advance
The way you'd want to do this is to make a new DBManager object that creates the database in its onCreate method--that way when the DatabaseHelper is first instantiated, the table will be created for you. Then you'd instantiate one and call getReadableDatabase() on it to get a DB object which you can then query.
This tutorial may help you more, it's more succinct and up to date: http://developer.android.com/guide/topics/data/data-storage.html#db
After that, to set up the list view in a ListActivity, you can call setListAdapter and pass in a SimpleCursorAdapter. Here's a tutorial on that: http://developer.android.com/guide/appendix/faq/commontasks.html#binding
Check if database already exists or not.
If you are running on emulator.
write following on terminal/shell:
adb shell
cd data/data/your package name(ex. com.android.etc)
ls
if there exists databases directory then may be database is created
cd databases
ls
it will show your database if exists;
sqlite3 "your db name"
then write
.tables
it will show the name of table if exist:
now write your query over here to check for errors for ex:
sqlite> SELECT _id, name, address FROM stores
hope it helps.....
and yes there are no as such required permissions for this.
I already have a SQLite database. I put it in the assets folder of my project. I read the Android documentation. It said that for all the databases in Android, the path is data/data/pack_name/database_name.
This confused me. I just placed it in the assets folder, so the path is data/data/assets/database_name?
The package name is not the project name, the package name is the namespace. From Anthony's link.
Remember to change the "YOUR_PACKAGE"
to your application package namespace
(i.e: com.examplename.myapp) in the
DB_PATH string.
For example, from the Hello World tutorial, the project name is HelloAndroid but the package name is com.example.helloandroid
If this application had a database, it would be stored at data/data/com.example.helloandroid/database
To see how it is for the other applications you can start your emulator. On the menu bar you have your avd's name (I think it stands for Android Virtual Device). On mine it s "avdessay:5554"
(On Linux) From command line, type:
adb -s emulator-5554 shell
You have to replace 5554 by whatever port you are using.
if you have the command prompt '#' you can type:
cd data/data
There, you will see that eveything is in a form of a package name.
More info here
When you create a database by utilizing the SQLiteDatabase or SQLiteOpenHelper classes, it creates the database in your data/data/package_name/database.
You can access that resource by using
InputStream myInput = myContext.getAssets().open(your_database_here);
Any other information, look at Using your own SQLite database in Android Applications
The package_name portion of the path, would be the name of your package. You can find the name of the package at the first line in your .java files.
As an example, my class starts with this at the top
package com.forloney.tracker;
So my database is in data/data/com.forloney.tracker/database folder.
Hope this makes sense.
#ScCrow I too followed this example and had the same problems you did until I realized I was not using the DataBaseHelper correctly (or rather it had a quirk I overlooked).
When you use your DatabaseHelper class in your activity, you have to make sure you call createDatabase first! If you look at the code for openDatabase it does NOT check to see if the database exists, so you either have to (attempt to) create the database in each activity you use it in, or modify the openDatabase method to check to make sure the db exists. The link posted does actually instruct you to use it this way but you (like me) may have glossed over that.
Bad:
DBAdapter db = new DBAdapter(this);
db.openDataBase(); //Bad! db not created yet!
Good:
DBAdapter db = new DBAdapter(this);
db.createDataBase(); //needs exception handling
db.openDataBase();
When I try to open my DB, I get "unable to open database file". I assume its not finding the DB and not some other programmer error. In the log I see the following which looks good to me.
sqllite3_open_v2("/data/data/com.isildo.HelloListView/databases/ListsDB" ...
This is the setup
private static String DB_PATH = "/data/data/com.isildo.HelloListView/databases/";
private static String DB_NAME = "ListsDB";
In my projects assets in the Package Explorer, I see the ListsDb database.
So I at least think I have it all correct. I am using the example at
[http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/]
In one of the posts here, someone offers a suggestion about setting some Assets parameters.
{no response to post there}
**To get an ASSETS folder into your APK:
In /nbproject/project.properties,
change assets.dir=
to
assets.dir=assets
assets.available=true
In /nbproject/build-impl.xml, there is line in the “if=assets.available” target that reads
that needs to be changed to**
Is this something we need to do, and if so, can we get a little better direction on the changes required. I could not find the places to make the suggested changes I looked at the project settings, and other things.
Yep, Im new to the environment, so I may just be not finding them. Im using Eclipse on windows.
In your DBAdapter.java, change the return type of openDatabase method to SQLiteDatabase.
When you access the database simply use SQLiteDatabase data = db.openDatabase(), where db is DBAdapter db = new DBAdapter(this).
So far we have developed apps in android that create database on runtime. We like to know how can we access a pre-built or existing database/sqlite file in our android app? Please provide detail
Take a look at the documentation for android.database.sqlite.SQLiteDatabase.
In particular, there's an openDatabase() command that will access a database given a file path.
SQLiteDatabase db = SQLiteDatabase.openDatabase(path, null, 0);
Just specify the path to your database as the path variable, and it should work.
I have followed the same road and found two issues:
Include the _id field on any table you create and make sure it is
part of the columns to return when you query any table.
You may run into an error like Failed to open the database. closing
it.. This is because we are copying the database from an existing
file instead of creating tables on top of a db created by the sqlite
android API and the table android_metadata may not exist. For
creating it just run the following query on your db:
CREATE TABLE android_metadata (locale TEXT);
And add the corresponding locale, for example en_US
First copy your SDCARD and give it's path in the variable "DBNAME" in the following example.
it will be something like "/sdcard/persons.db" if you are directly pulling it to sdcard.
Use this for accessing database in application :
Context context = getApplicationContext();
context.getDatabasePath(DataBaseHelper.database_Name);