![Dbhelper context](https://kumkoniak.com/4.jpg)
![dbhelper context dbhelper context](https://taeyeonkim93.github.io/images/android-pattern/mvc2.png)
Logically, a DBContext maps to a specific database that has a schema that the DBContext understands. I’m hoping it will be useful to someone in the future. The recommended way to work with context is to define a class that derives from the DbContext and exposes the DbSet properties that represent collections of the specified entities in the context. Use ContentValues to set the updated columns and than the update() method in which you have to specifiy, the table and a criteria to only update the rows you want to update. It’s all explained in detail in the following tutorial: ContentValues args = new ContentValues() ĭb.update(DATABASE_TABLE, args, KEY_ROWID + "=" + rowId, null) String args = new String ĭb.update("YOUR_TABLE", newValues, "name=? OR name=?", args) NewValues.put("YOUR_COLUMN", "newValue") ĭb.update("YOUR_TABLE", newValues, "id=6", null) Or ContentValues newValues = new ContentValues() You can try: db.execSQL("UPDATE DB_TABLE SET YOUR_COLUMN='newValue' WHERE id=6 ") MyDB.update("titles", args, strFilter, null)
![dbhelper context dbhelper context](https://i.stack.imgur.com/FwJ01.png)
String strFilter = "_id=" + Id ĬontentValues args = new ContentValues() In the lesson, there is one update function that requires all of the parameters, but I only want to update one column. Next you will need to create your own database to keep the content. Second, you need to define your content provider URI address which will be used to access the content. First of all you need to create a Content Provider class that extends the ContentProviderbaseclass. Now I just want to change the value of one column the others will remain unchanged. This involves number of simple steps to create your own content provider. In Android, one may create and use databases.Įverything is in order. I followed the instructions in this guide.
![Dbhelper context](https://kumkoniak.com/4.jpg)