I want to set first item checked of listview as default whenever an activity created. My activity consist of ListFragment which has ListView. The first item needs to be checked. I've write
listView.setItemChecked(0, true);
listView.setSelection(0);
listView.setSelected(true);
above code for check but on activity created it not get checked. kindly tell why and how i can achieve?
Full code:
public class LeftFilterContents extends ListFragment implements AdapterView.OnItemClickListener {
Get get;
View view;
ListView listView;
public interface Get {
void getData(int s);
}
#Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
get = (Get) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString());
}
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.list_fragment, container, false);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
ArrayList<String> arrayList = new ArrayList<>();
listView = (ListView) view.findViewById(android.R.id.list);
arrayList.add("Type");
arrayList.add("Date");
arrayList.add("From to Date");
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, arrayList);
setListAdapter(adapter);
listView.setItemChecked(0, true);
listView.setSelection(0);
listView.setSelected(true);
getListView().setOnItemClickListener(this);
}
#Override
public void onItemClick(AdapterView<?> parent, View view, int position,long id) {
get.getData(position);
}
ListView:
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</ListView>
Try this
yourListView.setSelection(0);
// updated the code
listView.setItemChecked(0,true)
//yourListView.getSelectedView().setSelected(true);
Add this line :
adapter.notifyDataSetChanged();
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
So you will have :
ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, arrayList);
setListAdapter(adapter);
listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
listView.setItemChecked(0, true);
getListView().setOnItemClickListener(this);
adapter.notifyDataSetChanged();
Related
I am trying to add 2 spinner in a fragment.These spinners are interconnected.When user select a value,2nd spinner will be populated with value.
Example:1st spinner have 2 values as "Car" & "Bus".
When users select "car",2nd spinner will be populated by color of the car as "Red","Blue".Again,if user select Bus,2nd spinner will be populated by color of bus as "Green","White".
I have made this in mainactivity successfully.But when I try to implement in a fragment ,2nd spinner is not populated and also there is no error showing.
I am providing the code that I have tried to implement in fragment.
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View rootView = inflater.inflate(R.layout.fragment_info_form, container, false);
//spCountries = (Spinner) v.findViewById(R.id.idCrimePlace);
//set the spinners
crimePlace = (Spinner) rootView.findViewById(R.id.idCrimePlace);
metro = (Spinner) rootView.findViewById(R.id.idMetro);
crimePlace.setOnItemSelectedListener((AdapterView.OnItemSelectedListener) this);
crimePlace.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
String spCrimePlace= String.valueOf(crimePlace.getSelectedItem());
//Toast.makeText(this, crimePlace, Toast.LENGTH_SHORT).show();
if(spCrimePlace.contentEquals("Car")) {
List<String> list = new ArrayList<String>();
list.add("Red");
list.add("Blue");
list.add("Others");
ArrayAdapter<String> dataAdapter = new ArrayAdapter<String>(getActivity().getApplicationContext(),
android.R.layout.simple_spinner_item, list);
dataAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dataAdapter.notifyDataSetChanged();
metro.setAdapter(dataAdapter);
}
if(spCrimePlace.contentEquals("Bus")) {
List<String> list = new ArrayList<String>();
list.add("Green");
list.add("White");
list.add("Other");
ArrayAdapter<String> dataAdapter2 = new ArrayAdapter<String>(getActivity().getApplicationContext(),
android.R.layout.simple_spinner_item, list);
dataAdapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
dataAdapter2.notifyDataSetChanged();
metro.setAdapter(dataAdapter2);
}
}
#Override
public void onNothingSelected(AdapterView<?> parent) {
}
});
return rootView;
}
Try calling your adapter like:
ArrayAdapter dataAdapter = new ArrayAdapter(this.getActivity(),
android.R.layout.simple_spinner_item, list);
And also use equals() instead of contentEquals
How to implement onItemClickListener on each item in the ListView to go to another activity / to a new class?
public class MainActivity extends Activity{
ListView list;
String[] itemname ={
"Resturants",
"Coffee Shops",
"Hotels",
"Gas Stations",
"Hospitals",
"Airports",
"ATM",
"Cinemmas",
"Phamacies"
};
Integer[] imgid={
R.drawable.restaurantz,
R.drawable.coffeeshop,
R.drawable.hotel,
R.drawable.gaspump,
R.drawable.hospitalblue,
R.drawable.airporticon,
R.drawable.atm,
R.drawable.cinemma,
R.drawable.hospitalblue,
};
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.content_main);
CustomListAdapter adapter = new CustomListAdapter(this, itemname, imgid);
list = (ListView) findViewById(R.id.list);
list.setAdapter(adapter);
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
}
}
inside onItemClick:
startActivity(new Intent(MainActivity.this, NewActivity.class));
if you need to differenciate the clicked item, you can use the position parameter, for example:
if (position == 0)
// do something
else
// do something else
My MainActivity, which extends ActionBarActivity, has a ListView, which I want to reload using notifyDataSetChanged(), but I do not know how to do this.
My code so far:
public class MainActivity extends ActionBarActivity {
private JournalEntryDataSource datasource;
private ListView listView = null;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
datasource = new JournalEntryDataSource(this);
datasource.open();
listView = (ListView) findViewById(R.id.list);
List<JournalEntry> values = datasource.getAllJournalEntries();
listView.setAdapter(new ArrayAdapter<JournalEntry>(this, R.layout.list_item, R.id.lugares, values));
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
Log.i("app", "Deleting item number " + position);
datasource.deleteJournalEntry((JournalEntry) listView.getAdapter().getItem(position));
//I would like to do this here:
//ArrayAdapter<JournalEntry> adapter = (ArrayAdapter<JournalEntry>) getListAdapter();
//adapter.notifyDataSetChanged();
}
});
}
But I get an error when calling adapter.notifyDatasetChanged()...
Any tips? I've been looking at similar questions and no luck so far...
--------EDITED CODE---------
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
datasource = new JournalEntryDataSource(this);
datasource.open();
listView = (ListView) findViewById(R.id.list);
values = datasource.getAllJournalEntries();
listView.setAdapter(new ArrayAdapter<JournalEntry>(this, R.layout.list_item, R.id.lugares, values));
ArrayAdapter<JournalEntry> adapter = (ArrayAdapter<JournalEntry>) getListAdapter();
// use the SimpleCursorAdapter to show the
// elements in a ListView
listView.setAdapter(new ArrayAdapter<JournalEntry>(this, R.layout.list_item, R.id.lugares, values));
listView.setLongClickable(true);
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> parent, View v, int position, long id) {
Log.i("hola","borrando la posición "+position);
JournalEntry removeMe = (JournalEntry)listView.getAdapter().getItem(position);
values.remove(removeMe);
datasource.deleteJournalEntry(removeMe);
//adapter.notifyDataSetChanged();
reloadMe();
return true;
}
});
}
public void reloadMe(){
//need to do this better... but meh.
Intent intent = new Intent(this, MainActivity.class);
this.startActivity(intent);
}
protected ListView getListView() {
if (listView == null) {
listView = (ListView) findViewById(android.R.id.list);
}
return listView;
}
protected void setListAdapter(ListAdapter adapter) {
getListView().setAdapter(adapter);
}
protected ListAdapter getListAdapter() {
ListAdapter adapter = getListView().getAdapter();
if (adapter instanceof HeaderViewListAdapter) {
return ((HeaderViewListAdapter)adapter).getWrappedAdapter();
} else {
return adapter;
}
}
}
Updated Answer for updated code
instead of creating the same activity again, you should choose to set another new adapter object with the new values object.
public void reloadMe(){
//need to do this better... but meh.
//Intent intent = new Intent(this, MainActivity.class);
//this.startActivity(intent);
listView.setAdapter(new ArrayAdapter<JournalEntry>(this, R.layout.list_item, R.id.lugares, values));
}
Perhaps, you are deleting from
datasource.deleteJournalEntry((JournalEntry) listView.getAdapter().getItem(position));
But you did not set "datasource" as the data source of the adapter. If you look carefully you did set the "values" list object-
listView.setAdapter(new ArrayAdapter<JournalEntry>(this, R.layout.list_item, R.id.lugares, values));
Perhaps you may need to also remove from the values list also.
I have two activities with ListView. This two activitises have individual layout-file. First have myListView01, second have myListView02. How to update listView's adapters?
I do so:
ListView list = (ListView)findViewById(R.id.myListView01);
myAdapter = new ArrayAdapter<String>(this, R.layout.item01, R.id.label, array01);
list.setAdapter(myAdapter);
I remove some items from the array01 and I need to update my listView without this elements.
But this solution to ListActivity does not work:
myAdapter.notifyDataSetChanged();
my code:
package ...;
import ...;
public class Class01 extends Activity
{
ArrayAdapter<String> mAdapter;
ArrayList<String> array01 = new ArrayList<String>();
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.layout01);
ListView list = (ListView)findViewById(R.id.my_list01);
mAdapter = new ArrayAdapter<String>(this, R.layout.item01, R.id.label, array01);
list.setAdapter(mAdapter);
}
public void onListItemClick (ListView parent, View v, int position, long id)
{
array01 = deleteElementByPosition(array01, position);
mAdapter.notifyDataSetChanged(); //does not work
}
public void deleteElementByPosition()
{
...
}
}
You have not set onItemClickListener for your ListView.
Extend your Class01 from ListActivity. Activity class doesn't have onListItemClick() method so it is never invoked. Or set your listener with setOnItemClickListener() for your ListView.
I've searched around for a while now to try to find a solution to this problem, but none of them have worked for me. I have a tab setup which displays tab activities. I'm trying to use a OnClickListener in ListView to catch click events in a list, but it doesn't work. Thanks in advance for helping!
public class Ettan extends ListActivity {
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.ettan);
ListAdapter adapter = new SimpleAdapter(this, mylist , R.layout.nyhetslista,
new String[] { "rubrik", "kategori" },
new int[] { R.id.item_title, R.id.item_subtitle });
setListAdapter(adapter);
final ListView lv = getListView();
lv.setTextFilterEnabled(false);
lv.setOnItemClickListener(new OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
Toast.makeText(getApplicationContext(), "yay", Toast.LENGTH_LONG).show();
}
});
}
}