i want to call this method getAllData(); from Fragment, this method return cursor data from SQlite Database and i want to use that data inside my Fragment to create listView, i use these lines of code to access that data
PackagesDbHelper mydb = new PackagesDbHelper(getActivity());
Cursor result = mydb.getAllData();
but on app launch i get this error "unfortunately app has stopped" but if i exclude this line of code
Cursor result = mydb.getAllData();
my app works fine
PackagesDbHelper
public class PackagesDbHelper extends SQLiteOpenHelper {
public Cursor getAllData() {
SQLiteDatabase db = this.getWritableDatabase();
Cursor result = db.rawQuery("SELECT * FROM " + PackagesContract.ufoneEntry.TABLE_NAME, null);
return result;
}
}
PackagesFragment
public class PackagesFragment extends Fragment {
private PackagesAdapter packagesAdapter;
PackagesDbHelper mydb = new PackagesDbHelper(getActivity());
@Override
public void onCreate(Bundle savedInstanceState) {
Cursor result = mydb.getAllData();
super.onCreate(savedInstanceState);
}
}
Here:
PackagesDbHelper mydb = new PackagesDbHelper(getActivity());
line causing issue because calling getActivity() at class level will return invalid Activity Context.
Initialize mydb object inside onCreate or any other method :
mydb = new PackagesDbHelper(getActivity());
Cursor result = mydb.getAllData();
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