Hi rohit,
put
dbw.FillData();
TextView col1 = (TextView)findViewById(R.id.col1);
TextView col2 = (TextView)findViewById(R.id.col2);
after the setContentView(R.layout.displaylog);
does it works?
On Tue, Apr 7, 2009 at 2:55 AM, rohit.kundal...@gmail.com <
rohit.kundal...@gmail.com> wrote:
>
> I'm trying to display contents of my database on the screen. Its
> giving the NullPointerException. I dunno where the problem lies
> exactly but seems that there is a problem with setlistadapter...
>
> Java:
> class DataBaseWork extends ListActivity
> {
> .
> .
> .
> .
> .
> .
>
> public void FillData()
> {
> Cursor c= GetAllRows();
>
>
> startManagingCursor(c);
> ListAdapter adapter = new SimpleCursorAdapter(
> this,
> R.layout.displaylog,
> c,
> new String[] {"login_time", "serverIP"},
> new int[] {R.id.col1,R.id.col2}
> );
> this.setListAdapter(adapter);
>
> }
> .
> .
> .
> .
>
> }
>
>
> the 'databasework' is not an activity.. the 'test' class shown below
> is the subactivity not the main one..
>
> i am calling the filldata() method from 'test' class :
>
> Java:
> public class test extends Activity {
> DataBaseWork dbw;
> @Override
> public void onCreate(Bundle icicle) {
> dbw = new DataBaseWork(this);
> super.onCreate(icicle);
> dbw.FillData();
>
> TextView col1 = (TextView)findViewById(R.id.col1);
> TextView col2 = (TextView)findViewById(R.id.col2);
>
> setContentView(R.layout.displaylog);
>
>
> }
>
>
> }
>
>
> cannot figure out what the problem is.. but when i comment out filldata
> (), the exception error vanishes.. so the problem lies there i guess..
> hav wasted a lot of time on this.. plz help..
>
> here is one of the relevant xml files i am using..
>
> XML:
> <?xml version="1.0" encoding="utf-8"?>
> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/
> android"
> android:orientation="vertical"
> android:layout_width="fill_parent"
> android:layout_height="fill_parent"
> >
> <TextView id="@+id/col1"
> android:layout_width="130sp"
> android:layout_height="wrap_content"
> android:textSize="10sp"
> android:text="Login Time"
> />
> <TextView id="@+id/col2"
> android:layout_width="fill_parent"
> android:layout_height="wrap_content"
> android:textSize="10sp"
> android:text="Server Address"
> />
> </LinearLayout>
>
> Note : I'm still using the very first SDK launched by Google. I find
> it convenient and don't have time to change the code to make it
> suitable for the latest SDK.
>
> >
>
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