upgrading database android

!"); } Catch(SQLException se) {se.printstacktrace (); }} @Override Public voidOnOpen (Sqlitedatabase db) {//TODO auto-generated Method StubLOG.E (TAG, "Sqlitehelper on open!"); Super. OnOpen (DB); } @Override Public voidOnupgrade (Sqlitedatabase db,intOldversion,intnewversion) { //TODO auto-generated Method StubLOG.E (TAG, "Sqlitehelper onupgrade!"); } } Test activitySqlitehelpertest.java Packagecom. Yao_guet.test; Importandroid.app.Activity; Importandroid

The database used in Android is an open source database SQLite database, the following is the main detailed introduction of the use of SQLite:An Introduction to SQLitewhen we write database applications, we need to consider the problem: because the software we develop may be

In the previous article, a brief introduction to some of the basic concepts of Android database, then from this section, start with the Android database creation and upgrade.As described above, Sqliteopenhelper is an abstract class, which is the best practice we use to create and upgrade databases. The following is a d

First, the ADB command configuration, if you encounter ADB is not an internal or external command, it is not a running program or a batch file. Configuration under Environment variables1. ADB is not an internal or external command, nor is it a running program or batch file.WORKAROUND: In My Computer-Properties-Advanced Computer Configuration-environment variables, system variables to find the path, the SDK Platform-tools added to it.D:\Java\android\

Android Virtual Machine adb shell sqlite3 database, Android sqlite3 Adb shell connection: // Http://www.cnblogs.com/xiaobo-Linux/ Android stores all data in the data/data directory. Run the cd command to go to the data/data directory: Cd/data LsCommand, you will see StudDB. db, which is our StudDB. db

Reprint Please specify source: http://blog.csdn.net/guolin_blog/article/details/39151617In the previous article, we learned the basic usage of litepal and experienced the convenience of using frames to create table operations. However, as you all know, creating a table is just one of the most basic steps in database operations, and the table structure we created at the outset is most likely to need to be modified in the late stages as requirements cha

,//fetching data from Table_num and table_data two columns in the database Newstring[] {table_num, table_data},//Views corresponding to name and number New int[] {Android. R.id.text1, Android. R.ID.TEXT2}); /*Add adapter to M_listview*/M_listview.setadapter (adapter); } } /*Key Event Handling*/ Public BooleanOnKe

Litepal for Android Litepal is an open source Android library that makes it easy for developers to use SQLite databases. You can do most of the database operations without writing any SQL statements, including creating or upgrading tables, adding, deleting, changing, checking, summing functions, and so on. The Li

Is there a good way to delete databases on Android real machines? Can I use file explorer on ddms to delete databases under data/on the real machine? You need to use the re manager to modify the read and write permissions of the folder before you can perform the operation. Or can you use the ADB command Su to execute it? After modification, you can delete the database. However, you have to manually modify t

Why can't I automatically add a primary key for an id when using the SQlite3 database on Android? No ., Android sqlite3 Why can't I automatically add a primary key for an id when using the SQlite3 database on Android? No. To write it like this: id integer primary key. If yo

Read database + database version updateAttention:A, place the database with the APK released under the/res/raw path under Android engineering.b, when the database file is stored on the phone, the path is/data/data/your package name/databases, and the other path will go wrong

FileInputStream and Android database tools for android Data Storage Three typical local data storage methods for Android Import android. content. Context;Import android. util. Log;Import java. io. FileInputStream;

The android Sqlite database of wavelet Linux enables users to log on and register easily !, Android sqlite I read a lot of the operating code of Android SQlite data written by others. They are full of clouds! It is not easy to understand at all. I think it is good to write and the