android-sqlite

问题 Hi I have following problem: data.clear(); data.addAll(datasource.getFilesInFolder()); //gets the data from Sqlite database adapter.notifyDataSetChanged(); generates this logCat output : 12-19 14:34:30.864: W/Binder(986): Caught a RuntimeException from the binder stub implementation. 12-19 14:34:30.864: W/Binder(986): java.lang.NullPointerException 12-19 14:34:30.864: W/Binder(986): at android.inputmethodservice.IInputMethodWrapper.setSessionEnabled(IInputMethodWrapper.java:280) 12-19 14:34

问题 I am working on one application and getting product images from the server. Currently I am saving those images into the SQLite database after converting them into byte array and at the time of use I convert them back into bitmap. Now I have below two queries: What is the best way to save the images in app from where we can sync them also and get when ever required. How to assign them on image view or button because sometimes memory issue arises and application stop suddenly. Please guide me.

问题 I have a table in SQLite 3 thus: sqlite> .schema CREATE TABLE table1 (id INTEGER PRIMARY KEY NOT NULL, title TEXT UNIQUE NOT NULL, priority INTEGER UNIQUE NOT NULL); Here is some sample data, for illustration: sqlite> SELECT * FROM table1; id title priority ---------- ---------- ---------- 1 a 1 2 b 2 3 c 3 4 d 4 I wish to add 1 to the priority of all cells with priority > 1 . Here is my first attempt: sqlite> UPDATE table1 SET priority = priority + 1 WHERE priority > 1; Error: column

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I'm building a simple android RPG. Each player has access to a maximum of about 50 soldiers. Each soldier has some stats (class, hp, attack, etc), and three inventory slots. There will be only about 100 items in the game to fill these inventory slots. I was hoping to set up a relational database that would have a

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed last year . I'm building a simple android RPG. Each player has access to a maximum of about 50 soldiers. Each soldier has some stats (class, hp, attack, etc), and three inventory slots. There will be only about 100 items in the game to fill these inventory slots. I was hoping to set up a relational database that would have a

问题 I'm an Android developer and recently came across the GLOB clause in SQLite. I cannot understand why we need GLOB given that LIKE is already in place. Both clauses have wildcards to represent single and multiple characters. The only difference is that GLOB is case sensitive. But is that all? Are there any queries where LIKE is a bad or inappropriate choice? Are there any cases where we absolutely have to use GLOBE vs LIKE or vice versa? 回答1: Case sensitivity is useful by itself, because this

问题 I'm an Android developer and recently came across the GLOB clause in SQLite. I cannot understand why we need GLOB given that LIKE is already in place. Both clauses have wildcards to represent single and multiple characters. The only difference is that GLOB is case sensitive. But is that all? Are there any queries where LIKE is a bad or inappropriate choice? Are there any cases where we absolutely have to use GLOBE vs LIKE or vice versa? 回答1: Case sensitivity is useful by itself, because this

问题 I want to add new columns to a SQLite database, but I already released my app on the Play Store so, if I edit it, users need to uninstall and reinstall the app, but I don't want that. Please, help, I am new to Android. 回答1: (1) Increment (or simply change) your database version (2) It would lead to onUpgrade() method call (3) Execute your query(for adding a new column) in the onUpgrade() method. The Right Way of doing is mentioned here in this blog. Sometimes user may update the version 1.5

问题 I am new to the Android Development. Currently, I am working on one Android Application having a large amount of data. So I have thought that I should have to store some of those data locally. I have one database having 2 tables. Table-1's size is: 4.5 MB Table-2's size is: 3.5 MB currently. i.e. Totally around 8.0 MB but in future database size can be increased and may be reach to 10 MB. Table-1: Rows(14927) and Columns(17) Table-2: Rows(9903) and Columns(38) My doubt is that can i store

问题 I am trying to secure some sensible data by implementing encryption in my already existing and functioning database setup in an android application. I tried to follow this tutorial (http://sqlcipher.net/sqlcipher-for-android/) and I browsed a lot of foruns, including the google group for Cipher. However, I still don't clearly understand how does SQLCipher work and how I should adapt my code to serve my needs. I am following this implementation of databases in android: http://www.vogella.com