sqlite

问题 I am testing my app on a rooted Nexus S phone. I finally have access to the /data/data folder thanks to some awesome help from this answer. Problem is when I try to use DDMS to "pull a file from the device" I get this error: [2012-03-20 18:15:26] Failed to pull selection [2012-03-20 18:15:26] (null) Anyone know how to pull a copy of the database so I can look at it in a SQLite editor? 回答1: I found out that to pull the actual database file (my_database.db) you have to use chmod on that

问题 I have an unfinished application, but I want to address now the future update of it. Suppose my app was upgraded, so when starts, detects that the database schema is outdated. So for each table has to update according to version number to the new schema while preserving all data. I've read somewhere that on Android the SQLite database have some version number, and auto update stuff, but I didn't found an example for this specific issue. How can this be accomplished on an Android app, using

问题 Is there any built-in function to enable query log in SQLite. I am familiar with Trace API, but I want to know if there is any predefined function for it. 回答1: There is no easy way to do this like with MySQL, but there are some options: One: Some wrapper-libraries have something like this built-in. But to find a wrapper library you would probably first need to identify the target language. Perl DBI? Python? C++? Two: I would not (in any way) recommend the following for a "production-grade"

问题 Why do we use the sqlite data base in android.I am developing an android application where the data is to be fetched from the server and do some data calculation and show it on the UI. Is it good for me to fetch the data into the sqlite DB and update the UI on regular interval from the sqlite in evry 20 minutes or will it be good to sent the Http get request to the server and update the data from teh response on the UI. I wanted to know which one will be better and why?Why to involve sqlite

问题 I have one Microsoft Access .MDB file and want to use that database in an Android application. How can I convert the .mdb database to SQLite? 回答1: You can write your own - it's not very difficult Install SQlite on your desktop - just go to sqlite.org Get JDBC access to SQLite (there're a lot of JDBC drivers for SQLite) Get JDBC access to your MDB (MS-Access) using JDBC (common JDBC-ODBC bridge driver is ok) Voilà! 回答2: You need to use some tools to convert database, refer to supported list

问题 I have one Microsoft Access .MDB file and want to use that database in an Android application. How can I convert the .mdb database to SQLite? 回答1: You can write your own - it's not very difficult Install SQlite on your desktop - just go to sqlite.org Get JDBC access to SQLite (there're a lot of JDBC drivers for SQLite) Get JDBC access to your MDB (MS-Access) using JDBC (common JDBC-ODBC bridge driver is ok) Voilà! 回答2: You need to use some tools to convert database, refer to supported list

问题 Wanting to deploy my project on different servers I would prefer to be able to specify a connect string using a relative path. I can't seem to get that to work and want to know if there is some trick to it...? 回答1: A suggestion You could build the absolute path in the app and pass that in the connection string. So, if you know that the database file is in the database subfolder of the application folder, you could do something like this (C#): string relativePath = @"database\myfile.s3db";

问题 Wanting to deploy my project on different servers I would prefer to be able to specify a connect string using a relative path. I can't seem to get that to work and want to know if there is some trick to it...? 回答1: A suggestion You could build the absolute path in the app and pass that in the connection string. So, if you know that the database file is in the database subfolder of the application folder, you could do something like this (C#): string relativePath = @"database\myfile.s3db";

问题 Wanting to deploy my project on different servers I would prefer to be able to specify a connect string using a relative path. I can't seem to get that to work and want to know if there is some trick to it...? 回答1: A suggestion You could build the absolute path in the app and pass that in the connection string. So, if you know that the database file is in the database subfolder of the application folder, you could do something like this (C#): string relativePath = @"database\myfile.s3db";