i am not able to display the detailed form information specific to the title user clicked on form1 Screen,when i click on any itemlist on form1 screen,i am able to display the detail of first item only(in my code int index=myNewsList.getSelectedIndex() returns always 0 as value)
Here my Detailed Code for Rss App:
//method called by the parsing thread
public void addNews(News newsItem) {
newsVector.addElement(newsItem);//initialsed list with vector
myNewsList = new List(newsVector);
myNewsList.setListCellRenderer(new NewsListCellRenderer());
form1.addComponent(myNewsList);
form1.show();
myNewsList.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
int selectedIndex = myNewsList.getSelectedIndex();
if(selectedIndex != -1){
newsItem1 = (News)news.elementAt(selectedIndex);
Label l=new Label();
l.setText(newsItem1.getPubDate());
Form detailedForm=new Form();
detailedForm.addCommand(m_backCommand);
detailedForm.addCommandListener(this);
detailedForm.addComponent(l);
detailedForm.show();
}
}
});
}
Can you help?
Add action listener to the list. It is called only if you click any item of the list. In that action listener, get the selected item and cast it to the News class object because you added News class objects in the list. From that object, get the unique property like news id. Pass it to another screen with the current form object (form1).
myNewsList = new List(news);
myNewsList.setListCellRenderer(new NewsListRenderer());
myNewsList.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
News allNewsClassObjs = (News) myNewsList.getSelectedItem();
int newsid = allNewsClassObjs.getNewsId();
displayCompleteNewsScreen(form1,newsid);
}
});
form1.addComponent(myNewsList);
form1.addCommand(cmdDetails);
form1.setScrollable(true);
form1.setTransitionInAnimator(Transition3D.createRotation(250, true));
form1.show();
With the news id, you can display the related data in another screen. Add back command to it. In the back command, just show the form1 object.
public void displayCompleteNewsScreen(Form form1,int newsid){
// Get the related data and add it to another form object(form2).
form2.addCommand("Back");
form2.addCommandListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
form1.show();
}
});
form2.show();
}
Instead of using
int selectedIndex = myNewsList.getSelectedIndex();
if(selectedIndex != -1){
newsItem1 = (News)news.elementAt(selectedIndex);
}
Use the below code
newsItem1 = (News)myNewsList.getSelectedItem();
Related
I'm developping an application, and now, I don't know what to do next:
I have a list of elements, each element has some informations + an ID + a logo.
What I want to do is creating a list like in the picture
List
Of course, I want it in a single layer, with the logo, some informations, and a button to define an action; where I could use the ID of the selected item.
I did some research, may be I found some relative subjects, but none of what I want.
My list is a
ArrayList<ArrayList<String>>
filled by data from database.
Thank you
Here it is:
public class Avancee extends Activity {
// Log tag
private static final String TAG = MainActivity2.class.getSimpleName();
// Movies json url
private static final String url = "http://blabla.com/movie.json";
private ProgressDialog pDialog;
private List<Movie> movieList = new ArrayList<Movie>();
private ListView listView;
private CustomListAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
listView = (ListView) findViewById(R.id.list);
adapter = new CustomListAdapter(this, movieList);
listView.setAdapter(adapter);
pDialog = new ProgressDialog(this);
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// changing action bar color
getActionBar().setBackgroundDrawable(
new ColorDrawable(Color.parseColor("#1b1b1b")));
// Creating volley request obj
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
//Log.d(TAG, response.toString());
hidePDialog();
String result = getIntent().getStringExtra("ITEM_EXTRAA");
System.out.println(result);
try{
JSONArray ja = new JSONArray(result);
for (int i = 0; i < ja.length(); i++) {
try {
JSONObject obj = ja.getJSONObject(i);
Movie movie = new Movie();
movie.setTitle(obj.getString("title"));
movie.setLocation(obj.getString("location_search_text"));
movie.setId(obj.getInt("id"));
// adding movie to movies array
movieList.add(movie);
} catch (JSONException e) {
e.printStackTrace();
}
}
}catch(JSONException e){
Log.e("log_tag", "Error parsing data "+e.toString());
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(movieReq);
}
#Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
It's the "id" that I want to get in the OnClick event.
use this code
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long l) {
Movie movie= movieList.get(position);
}
});
//here position will give you the id of listview cell so you can use it like
Movie movie= movieList.get(position);
then you can use it get all the data inside your moview object
i have a view pager with 3 fragment one of the fragment
have searchview widget and i get to know that i can,t implement the standard search interface so i implement some thing like this but how to implement Custom Suggestions in SearchView
public class LoaderCursor extends Activity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
FragmentManager fm = getFragmentManager();
// Create the list fragment and add it as our sole content.
if (fm.findFragmentById(android.R.id.content) == null) {
CursorLoaderListFragment list = new CursorLoaderListFragment();
fm.beginTransaction().add(android.R.id.content, list).commit();
}
}
public static class CursorLoaderListFragment extends ListFragment
implements OnQueryTextListener, LoaderManager.LoaderCallbacks<Cursor> {
// This is the Adapter being used to display the list's data.
SimpleCursorAdapter mAdapter;
// If non-null, this is the current filter the user has provided.
String mCurFilter;
#Override public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Give some text to display if there is no data. In a real
// application this would come from a resource.
setEmptyText("No phone numbers");
// We have a menu item to show in action bar.
setHasOptionsMenu(true);
// Create an empty adapter we will use to display the loaded data.
mAdapter = new SimpleCursorAdapter(getActivity(),
android.R.layout.simple_list_item_2, null,
new String[] { Contacts.DISPLAY_NAME, Contacts.CONTACT_STATUS },
new int[] { android.R.id.text1, android.R.id.text2 }, 0);
setListAdapter(mAdapter);
// Start out with a progress indicator.
setListShown(false);
// Prepare the loader. Either re-connect with an existing one,
// or start a new one.
getLoaderManager().initLoader(0, null, this);
}
#Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// Place an action bar item for searching.
MenuItem item = menu.add("Search");
item.setIcon(android.R.drawable.ic_menu_search);
item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
SearchView sv = new SearchView(getActivity());
sv.setOnQueryTextListener(this);
item.setActionView(sv);
}
public boolean onQueryTextChange(String newText) {
// Called when the action bar search text has changed. Update
// the search filter, and restart the loader to do a new query
// with this filter.
mCurFilter = !TextUtils.isEmpty(newText) ? newText : null;
getLoaderManager().restartLoader(0, null, this);
return true;
}
#Override public boolean onQueryTextSubmit(String query) {
// Don't care about this.
return true;
}
#Override public void onListItemClick(ListView l, View v, int position, long id) {
// Insert desired behavior here.
Log.i("FragmentComplexList", "Item clicked: " + id);
}
// These are the Contacts rows that we will retrieve.
static final String[] CONTACTS_SUMMARY_PROJECTION = new String[] {
Contacts._ID,
Contacts.DISPLAY_NAME,
Contacts.CONTACT_STATUS,
Contacts.CONTACT_PRESENCE,
Contacts.PHOTO_ID,
Contacts.LOOKUP_KEY,
};
public Loader<Cursor> onCreateLoader(int id, Bundle args) {
// This is called when a new Loader needs to be created. This
// sample only has one Loader, so we don't care about the ID.
// First, pick the base URI to use depending on whether we are
// currently filtering.
Uri baseUri;
if (mCurFilter != null) {
baseUri = Uri.withAppendedPath(Contacts.CONTENT_FILTER_URI,
Uri.encode(mCurFilter));
} else {
baseUri = Contacts.CONTENT_URI;
}
// Now create and return a CursorLoader that will take care of
// creating a Cursor for the data being displayed.
String select = "((" + Contacts.DISPLAY_NAME + " NOTNULL) AND ("
+ Contacts.HAS_PHONE_NUMBER + "=1) AND ("
+ Contacts.DISPLAY_NAME + " != '' ))";
return new CursorLoader(getActivity(), baseUri,
CONTACTS_SUMMARY_PROJECTION, select, null,
Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC");
}
public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
// Swap the new cursor in. (The framework will take care of closing the
// old cursor once we return.)
mAdapter.swapCursor(data);
// The list should now be shown.
if (isResumed()) {
setListShown(true);
} else {
setListShownNoAnimation(true);
}
}
public void onLoaderReset(Loader<Cursor> loader) {
// This is called when the last Cursor provided to onLoadFinished()
// above is about to be closed. We need to make sure we are no
// longer using it.
mAdapter.swapCursor(null);
}
}
}
I want to ask about finding a location using the action bar. I've made the program as shown below :
I've made a class to find location. but at the time I called into the EditText search, class does not work.
// An AsyncTask class for accessing the GeoCoding Web Service
private class GeocoderTask extends AsyncTask<String, Void, List<Address>>{
#Override
protected List<Address> doInBackground(String... locationName) {
// Creating an instance of Geocoder class
Geocoder geocoder = new Geocoder(getBaseContext());
List<Address> addresses = null;
try {
// Getting a maximum of 3 Address that matches the input text
addresses = geocoder.getFromLocationName(locationName[0], 3);
} catch (IOException e) {
e.printStackTrace();
}
return addresses;
}
}
protected void onPostExecute(List<Address> addresses) {
if(addresses==null || addresses.size()==0){
Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show();
}
// Clears all the existing markers on the map
map.clear();
// Adding Markers on Google Map for each matching address
for(int i=0;i<addresses.size();i++){
Address address = (Address) addresses.get(i);
// Creating an instance of GeoPoint, to display in Google Map
latLng = new LatLng(address.getLatitude(), address.getLongitude());
String addressText = String.format("%s, %s",
address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "",
address.getCountryName());
markerOptions = new MarkerOptions();
markerOptions.position(latLng);
markerOptions.title(addressText);
map.addMarker(markerOptions);
// Locate the first location
if(i==0)
map.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,10));
}
}
and I had to call the class to the class action bar menu. like this:
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.cost_direction, menu);
/** Get the action view of the menu item whose id is search */
View v = (View) menu.findItem(R.id.search).getActionView();
/** Get the edit text from the action view */
EditText txtSearch = ( EditText ) v.findViewById(R.id.txt_search);
/** Setting an action listener */
txtSearch.setOnEditorActionListener(new OnEditorActionListener() {
#Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
// Getting user input location
String location = v.getText().toString();
if(location!=null && !location.equals("")){
new GeocoderTask().execute(location);
}
Toast.makeText(getBaseContext(), "Search : " + v.getText(), Toast.LENGTH_SHORT).show();
return false;
}
});
return super.onCreateOptionsMenu(menu);
}
please help for those who know about the problems I was having. :)
String strPlace = etSearch.getText().toString();
Geocoder gc = new Geocoder(getBaseContext(), Locale.getDefault());
List<Address> adrs = null;
try{
adrs = gc.getFromLocationName(strPlace,5);
}catch(IOException e){
}finally{
if (adrs != null){
if(adrs.size() > 0)
{
LatLng loc = new LatLng(adrs.get(0).getLatitude(), adrs.get(0).getLongitude());
map.moveCamera(CameraUpdateFactory.newLatLngZoom(loc, 15));
// Zoom in, animating the camera.
map.animateCamera(CameraUpdateFactory.zoomTo(13), 2000, null);
}
i want to set a title and an image to lwuit list from Rss feed,i am able to set title ,but i dont know how to set an image?after i set an image and title ,then i need to display it on form...
here my code:,Help...
public void disp() {
//String[] items={newsItem.getTitle()};
for(int i=0;i<news.size();i++){
newsItem=(News)news.elementAt(i);
myNewsList.addItem(newsItem.getTitle().toString());
System.out.println(newsItem.getTitle());
}
try{
System.out.println("hiii");
form1.addComponent(myNewsList);
form1.addCommand(cmdDetails);
form1.setScrollable(true);
form1.setTransitionInAnimator(Transition3D.createRotation(250, true));
form1.show();
}
catch(Exception e){
e.printStackTrace();
}
You can use list renderer to add image and text in single list item.
NewsListRenderer.java
public class NewsListRenderer implements ListCellRenderer {
private Label lblImage;
private TextArea textAreaHeadline;
public Component getListCellRendererComponent(List arg0, Object obj,
int arg2, boolean isSelected) {
Container newsContainer = new Container();
newsContainer.setLayout(new BoxLayout(BoxLayout.X_AXIS));
News newsListObj = (News) obj;
Image img = newsListObj.getThumbnail();
lblImage = new Label(img);
lblImage.getStyle().setBgTransparency(0);
lblImage.setTextPosition(Component.BOTTOM);
newsContainer.addComponent(lblImage);
textAreaHeadline = new TextArea(3, 25);
textAreaHeadline.setSelectedStyle(textAreaHeadline.getStyle());
textAreaHeadline.setText(newsListObj.getHeadLine());
textAreaHeadline.setEditable(false);
textAreaHeadline.getStyle().setBorder(null);
textAreaHeadline.setFocusable(false);
textAreaHeadline.getStyle().setBgTransparency(0);
newsContainer.addComponent(textAreaHeadline);
return newsContainer;
}
public Component getListFocusComponent(List arg0) {
return new Container();
}
}
Members of News Class:
1) News title - getHeadLine() to retrieve title.
2) News Image - getThumbnail() to retrieve image.
myNewsList = new List(news);
myNewsList.setListCellRenderer(new NewsListRenderer());
form1.addComponent(myNewsList);
form1.addCommand(cmdDetails);
form1.setScrollable(true);
form1.setTransitionInAnimator(Transition3D.createRotation(250, true));
form1.show();
Situation:-
In my code I have to use the LWUIT Component object for the listview controls. The controls are dynamic and hence can be in any number.
Right now I am creating Component objects according to the controls(in numbers) i.e.- for every control to be created first the Component object is creating.
This process slows down the rendering of the listview when the controls are increasing.
Solution:-
If I create the Component object and use it in a loop for all the controls it is taking the reference of the object and hence displays all the listview items(controls) with the same data.
Now I am able to think of one last option of Cloning my object and using it to create the controls.
Problem:-
But I can't find any way in LWUIT by which I can achieve the copying of object.
What can be the alternatives in LWUIT to solve this problem?
P.S.-The listview items are of same type, but with different data.
Use a List component and the Renderer design pattern to create a "rubber stamp" component where you can display a large number of elements easily. See an explanation of this in the Codename One blog.
Create these classes first :
public class ListUtil {
private Vector data = new Vector();
private Content[] contents;
public ListUtil(Vector vData)
{
data = vData;
contents = new Content[vData.size()];
}
public List createList(Display display, CListCell renderer, ActionListener listener)
{
CList theList;
for(int i = 0; i < data.size(); i++)
{
contents[i] = new Content(String.valueOf(data.elementAt(i)));
}
theList = new CList(display, contents, renderer, listener);
return theList;
}
}
public class Content
{
private String row;
public Content(String row)
{
this.row = row;
}
public String getRow()
{
return (row);
}
}
public class CListCell extends Container implements ListCellRenderer {
private Label focus = new Label("");
public CListCell()
{
super();
// create and add the components here among the components which will display data
}
public Component getListCellRendererComponent(List list, Object value, int index, boolean isSelected)
{
Content entry = null;
if (value instanceof Content)
entry = (Content)value;
componentDisplayingDataAddedIntoThisListCellRenderer.setText(entry.getRow());
return this;
}
public Component getListFocusComponent(List arg0)
{
return focus;
}
}
public class CList extends List {
private Display disp;
public CList(Display display, Object[] data, CListCell renderer, ActionListener actionListener)
{
super(data);
setListCellRenderer(renderer);
setIgnoreFocusComponentWhenUnfocused(true);
addActionListener(actionListener);
setScrollAnimationSpeed(getScrollAnimationSpeed()/4);
disp = display;
}
public void pointerReleased(int x,int y)
{
if (isEnabled() && hasFocus())
super.pointerReleased(x, y);
}
public void keyReleased(int keyCode)
{
if (isEnabled() && hasFocus())
{
if (disp.getGameAction(keyCode) == Display.GAME_FIRE)
pointerReleased(getX(),getY());
else
super.keyReleased(keyCode);
}
}
}
To create your List and add it to a Form :
public class myForm extends Form implements ActionListener
{
private Vector listSource = // your vector of data
private CListCell renderer = new CListCell();
private List theList = (new ListUtil(listSource)).createList(Display.getInstance(),renderer, this);
...
public void actionPerformed(ActionEvent evt)
{
if (evt.getSource() == theList)
doSomething();
}
}