I want to simply filter my listViews's items by an EditText, i do this with ArrayAdapter implementing Filterable but for some reason i got a massive NullPointerException... I did this by some tutorials and i just cant figure it out what is the problem i tried to try catch everything in my code but i just cant make it work.
When i try to type text to my EditText, it is freezes then i got the crash:
Any suggestions will be greatly appreciated. Thanks.
07-06 11:35:15.785: E/AndroidRuntime(28779): FATAL EXCEPTION: main
07-06 11:35:15.785: E/AndroidRuntime(28779): java.lang.NullPointerException
07-06 11:35:15.785: E/AndroidRuntime(28779): at com.KeySoft.OpenGuide.Adapter.SearchAdapter.getView(SearchAdapter.java:61)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.AbsListView.obtainView(AbsListView.java:1533)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.ListView.makeAndAddView(ListView.java:1793)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.ListView.fillSpecific(ListView.java:1338)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.ListView.layoutChildren(ListView.java:1624)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.AbsListView.onLayout(AbsListView.java:1384)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.View.layout(View.java:7228)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.RelativeLayout.onLayout(RelativeLayout.java:912)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.View.layout(View.java:7228)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1254)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1130)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.LinearLayout.onLayout(LinearLayout.java:1047)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.View.layout(View.java:7228)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.View.layout(View.java:7228)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.widget.FrameLayout.onLayout(FrameLayout.java:338)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.View.layout(View.java:7228)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.ViewRoot.performTraversals(ViewRoot.java:1145)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.view.ViewRoot.handleMessage(ViewRoot.java:1865)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.os.Handler.dispatchMessage(Handler.java:99)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.os.Looper.loop(Looper.java:123)
07-06 11:35:15.785: E/AndroidRuntime(28779): at android.app.ActivityThread.main(ActivityThread.java:3687)
07-06 11:35:15.785: E/AndroidRuntime(28779): at java.lang.reflect.Method.invokeNative(Native Method)
07-06 11:35:15.785: E/AndroidRuntime(28779): at java.lang.reflect.Method.invoke(Method.java:507)
07-06 11:35:15.785: E/AndroidRuntime(28779): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
07-06 11:35:15.785: E/AndroidRuntime(28779): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600)
07-06 11:35:15.785: E/AndroidRuntime(28779): at dalvik.system.NativeStart.main(Native Method)
Here is my Adapter with Filterable:
public class SearchAdapter extends ArrayAdapter<KeresesBejegyzes> implements Filterable
{
private Activity context;
private List<KeresesBejegyzes> bejegyzesek;
private List<KeresesBejegyzes> eredetiBejegyzesek;
static class ViewHolder
{
public TextView shopNameTv;
public TextView shopTavTv;
}
public SearchAdapter(Activity context, List<KeresesBejegyzes> bejegyzesek_)
{
super(context, R.layout.rowlayout, bejegyzesek_);
this.context = context;
this.bejegyzesek = bejegyzesek_;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
View rowView = convertView;
if (rowView == null)
{
LayoutInflater inflater = context.getLayoutInflater();
rowView = inflater.inflate(R.layout.rowlayout, null);
ViewHolder viewHolder = new ViewHolder();
viewHolder.shopNameTv = (TextView) rowView.findViewById(R.id.shopNameTv);
viewHolder.shopTavTv = (TextView) rowView.findViewById(R.id.tavTv);
rowView.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) rowView.getTag();
KeresesBejegyzes bejegyzes = bejegyzesek.get(position);
holder.shopNameTv.setText(bejegyzes.getNev());
if (bejegyzes.getTavolsag() != 0)
{
holder.shopTavTv.setText(Double.toString(bejegyzes.getTavolsag()) + " km - " + bejegyzes.getTipus());
}
else
{
holder.shopTavTv.setText(bejegyzes.getTipus());
}
return rowView;
}
@Override
public Filter getFilter()
{
try
{
Filter filter = new Filter()
{
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results)
{
bejegyzesek = (List<KeresesBejegyzes>) results.values; // has
// the
// filtered
// values
notifyDataSetChanged(); // notifies the data with new
// filtered values
}
@Override
protected FilterResults performFiltering(CharSequence constraint)
{
FilterResults results = new FilterResults(); // Holds the
// results
// of a
// filtering
// operation
// in values
List<KeresesBejegyzes> FilteredArrList = new ArrayList<KeresesBejegyzes>();
if (eredetiBejegyzesek == null)
{
eredetiBejegyzesek = new ArrayList<KeresesBejegyzes>(bejegyzesek); // saves
// the
// original
// data
// in
// mOriginalValues
}
/********
*
* If constraint(CharSequence that is received) is null
* returns the mOriginalValues(Original) values else does
* the Filtering and returns FilteredArrList(Filtered)
*
********/
if (constraint == null || constraint.length() == 0)
{
// set the Original result to return
results.count = eredetiBejegyzesek.size();
results.values = eredetiBejegyzesek;
}
else
{
constraint = constraint.toString().toLowerCase();
for (int i = 0; i < eredetiBejegyzesek.size(); i++)
{
KeresesBejegyzes data = eredetiBejegyzesek.get(i);
if (data.getNev().toLowerCase().contains(constraint.toString()) || data.getCim().toLowerCase().contains(constraint.toString()))
{
FilteredArrList.add(data);
}
}
// set the Filtered result to return
results.count = FilteredArrList.size();
results.values = FilteredArrList;
}
return results;
}
};
return filter;
}
catch (Exception e)
{
Log.e("SearchAdapterError", e.toString());
}
return null;
}
}
And this is the EditText:
searchEditText.addTextChangedListener(new TextWatcher()
{
@Override
public void onTextChanged(CharSequence s, int start, int before, int count)
{
try
{
if(searchAdapter.getFilter() != null)
{
searchAdapter.getFilter().filter(s.toString());
}
else
{
ki("Error 8: searchAdapter.getFilter() == null");
}
}
catch(Exception e)
{
ki("Error 7:"+e);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
E D I T for dj aqeel:
I only got null pointer ex when i try to search via EditText, my listView shows my list verry well, i can even sort it, that works well without any exception.
Init: (I just realized bejegyzesek is not a list, it is a vector, could it be a problem ? It is an old code remaking so i left this unchanged by a mistake..)
So this is in my Activity:
public class Search extends Activity
{
Vector<KeresesBejegyzes> bejegyzesek = new Vector<KeresesBejegyzes>();
// (...more code here...)
db.open();
Cursor c = db.getAllShopsFullTitles();
if(c.moveToFirst())
{
do
{
KeresesBejegyzes kb = new KeresesBejegyzes();
kb.setNev(c.getString(1));
kb.setTipus(c.getString(2));
kb.setLatitude(Double.parseDouble(c.getString(4)));
kb.setLonditude(Double.parseDouble(c.getString(5)));
bejegyzesek.add(kb);
}while(c.moveToNext());
}
db.close();
listView = (ListView)findViewById(R.id.listView);
searchAdapter = new SearchAdapter(this, bejegyzesek);
listView.setAdapter(searchAdapter);
