Android : ContentProvider Storage/memory - Data Can Be Stored In File System - In An SQLite Database
Oct 20, 2010
Please direct me to a description of the techniques that the ContentProvider employs to access data. I am trying to understand how it works as well as what is tunable or even if its meant to be tunable. It the memory management tiered, cached, virtual, flat? Is it file based, shmem based, stream based? Can there be a combination thereof?
Any information, suggestions, or references are welcome. The android fundamentals page says: "The data can be stored in the file system, in an SQLite database, or in any other manner that makes sense;" but the android ContenProvider page barely skins the onion.
I am developing an application that periodically sends information to an external server.I make a local copy of the data being sent, for backup purposes.What is the best option to store the data in terms of saving battery life? Each data submission is a serialized object (the class has 5 fields, including a date, numbers and strings) of about 5K-10K.Any other idea?
I'm writing a ContentProvider that will provide content that is not stored in a file or database.I understand hat I have to overwrite openAssetFile() method.My problem is that I don't know how to create AssetFileDescriptor from data in memory (byte array or stream).Can anybody please point me to the right direction?I was digging in Android source where they use MemoryFile but I can't obtain ParcelFileDescriptor from MemoryFile.
I need to write a ContentProvider to provide a dynamically generated audio stream to be playable by MediaPlayer. That is MediaPlayer will use ContentResolver.openInputStream() to play it. I have read a lot of discussions about this problem but no one had a solution yet. The most recent one was in January 2010: http://groups.google.com/group/android-developers/browse_thread/threa.
1. Is there any stored procedure support in the sqlite database of Android? and any docs on doing this?
2. Is there any way my Android progam can know the data in the Android native data set have been changed? like contacts, calllog, and calendar? that is, once the data inside the Android native database have been changed, can my program be notified? and how to do it?
As the title, I create a ByteArray to store the file in blob like this: byte red_buf = myCursor.getBlob(1);And I wanna use FileOutputStream to open.But I don't know how to do. Can anyone give me a example or website please?
- have a database that contains a word, and the name of an image file associated with that word. - the words from the database will be displayed in a listview - when the word is selected, a new activity will start displaying the word and the image in an image view.
Would it be best to store the terms in an array and have the list view populate from this array and then pull from the database onitemclick? Or can the list view be populated with the terms from the database?
Will android be able to display the image if the name of the file is stored in the db?
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.
Im doing an app which uses sqlite db file in assets folder, There is a screen in my app having a button 'check for update'. Client has given me an URL link to update db file(which gives a sqlite file). When user clicks on the button i need to upgrade the old db file with new db file from URL.
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?
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.
I want to have a list of restaurants with information such as addresses and phone numbers in my app. I also want to be able to edit this information after the app is published. What is the standard way for doing this? Would I need to use a SQLite database?
How to fetch data from database like mysql / sqlite.can any one help me in this,i have tried the examples gave in the NOTEPAD sample.its not working(it dont shows any errors.) can any one guide me in this ...
I want to insert some tables by default to our sqllite db .in my app i want to display different items according to different categories .and in application user also add items and new categories,for that purpose i want to add some data to db by default.How we add data to sqlite by default .Please give me some suggestions.its urgent.
I am storing a pre-created database file and an xml file in my dropbox ( for storage ) I would like to be able to read the xml file and if the version is different download the new database file and replace it on the sd card.