Also, don't do this:
startActivity(getIntent());
This launches a new activity just like the current one.
If you need to keep the current activity and update the UI with new
data, just put that code in a function and call it when necessary.
-- Kostya
08.12.2010 14:31, pramod.deore пишет:
Thanks Kostya for your suggestion and link.
On Dec 8, 4:27 pm, Kostya Vasilyev<[email protected]> wrote:
Pramod,
Move the code that loads data from the database from onCreate to onStart.
See this for an explanation:
http://developer.android.com/guide/topics/fundamentals.html#actlife
( scroll down to see a very useful flowchart )
-- Kostya
08.12.2010 14:08, pramod.deore пишет:
Hi everybody,
In my application I am displaying list. I have created
ContextMenu. In that there are options like add,remove,back,etc...
Now when I select Remove option then I call method
deleteRecord(), which delete that list record from database. After
that I call method - startActivity(getIntent()); Because of this
method activity restarts and list changes are instantly visible to
user because in start method I had write code that display the list
like.
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
try
{
sampleDB = this.openOrCreateDatabase(SAMPLE_DBNAME,
MODE_PRIVATE, null);
Cursor c = sampleDB.rawQuery ("SELECT RoomName,
SwitchFullName FROM SwitchTable ORDER BY RoomName",null);
int count = c.getCount();
System.out.println ("Total number of records are"+count);
if (c != null )
{
if (c.moveToFirst())
{
do
{
roomName =
c.getString(c.getColumnIndex("RoomName"));
switchName =
c.getString(c.getColumnIndex("SwitchFullName"));
System.out.println
(roomName+":"+switchName);
results.add(roomName+"-"+switchName);
}
while (c.moveToNext());
c.close();
}
}
this.setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1,results));
}
catch (SQLiteException se )
{
Log.e(getClass().getSimpleName(), "Could not create or Open
the database");
}
finally
{
//sampleDB.close();
}
registerForContextMenu(getListView());
}
Now suppose I have list like this
Hall - Fan
Kitchen - AC
Bedroom - tv
and suppose I delete record no 1 then list display as following
Kitchen - AC
Bedroom - tv
It looks perfectly well. But suppose I press the back button then
list is again display as
Hall - Fan
Kitchen - AC
Bedroom - tv
Actually first record is deleted succesfully, but though also it is
displayed when I press back button. How to avoid this problem?
--
Kostya Vasilyev -- WiFi Manager + pretty widget --http://kmansoft.wordpress.com
--
Kostya Vasilyev -- WiFi Manager + pretty widget -- http://kmansoft.wordpress.com
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