I've developed UI application in blackberry.
On Button Click event I want to display result of adding two number.
How to handle this event in java app of Blackberry?
Best option to consume click event in ButtonField is to use FieldChangeListener. Just implement FieldChangeListener interface and apply ButtonField.setChangeListener():
class MenuScreen extends MainScreen implements FieldChangeListener {
EditField mNumberAEditField;
EditField mNumberBEditField;
ButtonField mAddButtonField;
public MenuScreen() {
super(DEFAULT_CLOSE);
mNumberAEditField = new EditField("A:", "2", 10,
EditField.FILTER_INTEGER);
add(mNumberAEditField);
mNumberBEditField = new EditField("B:", "2", 10,
EditField.FILTER_INTEGER);
add(mNumberBEditField);
mAddButtonField = new ButtonField("A + B",
ButtonField.CONSUME_CLICK);
add(mAddButtonField);
mAddButtonField.setChangeListener(this);
}
public void fieldChanged(Field field, int context) {
if(field == mAddButtonField)
{
showAddResult();
}
}
private void showAddResult() {
String message = "";
String aStr = mNumberAEditField.getText();
String bStr = mNumberBEditField.getText();
if(aStr == "")
message = "Enter A value!";
else if(bStr == "")
message = "Enter B value!";
else
{
int res = Integer.parseInt(aStr)+Integer.parseInt(bStr);
message = aStr+" + "+bStr+" = "+String.valueOf(res);
}
Dialog.inform(message);
}
}
Other option with FieldChangeListener is to declare and implement it inline. than you will not have to check from which field event is coming:
mAddButtonField.setChangeListener(new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
showAddResult();
}
});
or..
add(new ButtonField("Click Me")) {
protected boolean navigationClick(int status, int time) {
showAddResult();
return true;
}
});
Related
I'm clicking on a product item in listview in product page viewmodel to show a popup(using rg.plugin popup) for selecting one of the product variants.After selecting variant,i am sending the selected variant to product page using messagingcenter from variant popup page viewmodel,subscribed in product page viewmodel constructor. working fine there.when i navigate to the previous page and then came back to this product page for adding one or more variant to the
same previously selected product,Messagingcenter subscribe called twice and product value increased twice.Tried to subscribe in the product page onappearing and unsubscribe in disappearing method.still calling two times? How to solve this issue?
calling popup:
var result = await dataService.Get_product_variant(store_id, product_id);
if (result.status == "success")
{
ind_vis = false;
OnPropertyChanged("ind_vis");
App.Current.Properties["product_variant_result"] = result;
App.Current.Properties["cartitems"] = purchaselist;
App.Current.Properties["selected_product"] = product_List2 ;
await PopupNavigation.Instance.PushAsync(new Popup_variant());
}
popup viewmodel: sending message
public Popup_variant_vm()
{
Radio_btn = new Command<Product_variant_list2>(Radio_stk_tapped);
product_variant_list = new List<Product_variant_list2>();
purchaselist = new ObservableCollection<Product_list2>();
show_variants();
}
internal void Confirm_variant()
{
if(App.Current.Properties.ContainsKey("selected_variant"))
{
MessagingCenter.Send<Popup_variant_vm, object>(this, "selected_variant", App.Current.Properties["selected_variant"]); //Message send from popup to product page
}
else
{
DependencyService.Get<IToast>().LongAlert("Please select any size");
}
}
product page viewmodel: subscribed here..called twice when navigating from previous page to this
public Store_page()
{
InitializeComponent();
}
protected override void OnAppearing()
{
base.OnAppearing();
var vm = new store_page_vm();
vm.Navigation = Navigation;
BindingContext = vm;
MessagingCenter.Unsubscribe<Popup_variant_vm, object>(this, "selected_variant");
MessagingCenter.Subscribe<Popup_variant_vm, object>(this, "selected_variant",async (sender, selected_variant) =>
{
var vm1 = BindingContext as store_page_vm;
vm1?.Addcart2(selected_variant);// called twice
});
}
unsubscribed in product cs page
protected override void OnDisappearing()
{
var vm = BindingContext as store_page_vm;
vm?.Save_cart();
MessagingCenter.Unsubscribe<Popup_variant_vm>(this, "selected_variant");
}
Your unsubscription should look something like below and it should work :
MessagingCenter.Unsubscribe<Popup_variant_vm, object>(this, "selected_variant");
https://stackoverflow.com/a/44753021/10937160
try this, and make sure you do not call Subscribe more than once.
My solution:
put unsubscribe sentence into subscribe body !!
MessagingCenter.Subscribe<object, string>(this, "IdSearch", (sender, arg) =>
{
listView.ItemsSource = arg;
MessagingCenter.Unsubscribe<object, string>(this, "IdSearch");
}, BindingContext);
I have created static counter variable in my app the in subscriber I have done this:
public static class Constants
{
public static int msgCenterSubscribeCounter { get; set; } = 0;
}
MessagingCenter.Subscribe<object, string>(this, "hello", (sender, arg) =>
{
Constants.msgCenterSubscribeCounter++;
if (arg.Equals("hello") && Constants.msgCenterSubscribeCounter == 1)
{
// handle your logic here
}
});
Reset counter in OnDisappearing() method from where you have called Send.
Changing Messagingcenter in to single subscription.
public class Messagingcenter_singleton
{
private static Messagingcenter_singleton _instance;
private bool isActivated = false;
private Action<string> callBackFun = null;
public static Messagingcenter_singleton Instance()
{
if (_instance == null)
{
_instance = new Messagingcenter_singleton();
}
return _instance;
}
public void setCallBack(Action<string> eventCallBack)
{
callBackFun = eventCallBack;
}
public void startSubscribe()
{
if (!isActivated)
{
isActivated = true;
MessagingCenter.Subscribe<string, string>(this, "Name", eventCallBack);
}
}
private void eventCallBack(string arg1, string arg2)
{
if (callBackFun != null)
{
InvokeMethod(new Action<string>(callBackFun), arg2);
}
}
public static object InvokeMethod(Delegate method, params object[] args)
{
return method.DynamicInvoke(args);
}
}
Use Below Code in you view model class
public void initSubscribe()
{
Messagingcenter_singleton.Instance().startSubscribe();
Messagingcenter_singleton.Instance().setCallBack(eventCallBack)
}
public void eventCallBack(string arg2)
{
// write your code here
}
I just recently used android:TabbedPage.ToolbarPlacement="Bottom". I used to have the following code:
void TabLayout.IOnTabSelectedListener.OnTabUnselected(TabLayout.Tab tab)
{
var playPage = Element.CurrentPage as NavigationPage;
if (!(playPage.RootPage is PhrasesFrame))
return;
var tabLayout = (TabLayout)ViewGroup.GetChildAt(1);
var playTab = tabLayout.GetTabAt(4);
tab.SetText("Play");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
Anyone knows how can I implement this with ToolbarPlacement="Bottom" ? I have implemented both BottomNavigationView.IOnNavigationItemSelectedListener, BottomNavigationView.IOnNavigationItemReselectedListener but can't find any reference for UnselectedTab if there is any.
Edit:
Previous custom renderer using the default tab position and implementing TabLayout:
namespace Japanese.Droid
{
public class MyTabbedPageRenderer: TabbedPageRenderer, TabLayout.IOnTabSelectedListener
{
ViewPager viewPager;
TabLayout tabLayout;
bool setup;
public MyTabbedPageRenderer(Context context): base(context){ }
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
// More codes here
}
void TabLayout.IOnTabSelectedListener.OnTabReselected(TabLayout.Tab tab)
{
UpdateTab(tab);
}
void TabLayout.IOnTabSelectedListener.OnTabSelected(TabLayout.Tab tab)
{
UpdateTab(tab);
}
void TabLayout.IOnTabSelectedListener.OnTabUnselected(TabLayout.Tab tab)
{
var playPage = Element.CurrentPage as NavigationPage;
if (!(playPage.RootPage is PhrasesFrame))
return;
var tabLayout = (TabLayout)ViewGroup.GetChildAt(1);
var playTab = tabLayout.GetTabAt(4);
tab.SetText("Play");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
void UpdateTab(TabLayout.Tab tab)
{
// To have the logic only on he tab on position 1
if (tab == null || tab.Position != 4)
{
return;
}
if (tab.Text == "Play")
{
tab.SetText("Pause");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_pause_outline_22);
App.pauseCard = false;
}
else
{
tab.SetText("Play");
tab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
}
}
}
Current custom renderer using the ToolbarPlacement="Bottom":
namespace Japanese.Droid
{
public class BottomTabPageRenderer : TabbedPageRenderer, BottomNavigationView.IOnNavigationItemSelectedListener, BottomNavigationView.IOnNavigationItemReselectedListener
{
public BottomTabPageRenderer(Context context) : base(context) { }
protected override void OnElementChanged(ElementChangedEventArgs<TabbedPage> e)
{
base.OnElementChanged(e);
// More codes here
}
bool BottomNavigationView.IOnNavigationItemSelectedListener.OnNavigationItemSelected(IMenuItem item)
{
base.OnNavigationItemSelected(item);
UpdateTab(item)
}
void BottomNavigationView.IOnNavigationItemReselectedListener.OnNavigationItemReselected(IMenuItem item)
{
UpdateTab(item);
}
void UpdateTab(IMenuItem item)
{
var playTabId = 4;
var title = item.TitleFormatted.ToString();
if (item == null || item.ItemId != playTabId)
{
return;
}
if (item.ItemId == playTabId)
{
if (title == "Play")
{
item.SetTitle("Pause");
item.SetIcon(Resource.Drawable.ionicons_2_0_1_pause_outline_22);
App.pauseCard = false;
}
else
{
item.SetTitle("Play");
item.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
}
}
}
}
So now my problem is I don't have any idea how will I implement the TabLayout.IOnTabSelectedListener.OnTabUnselected in the new custom renderer.
There is no official stuff for OnTabReselected event for TabbedPage's bottom navigation or
BottomNavigationView because It doesn't use TabLayout.Tab for a start. Many overridden methods of TabbedPageRenderer not being called like SetTabIcon. If you are using IOnTabSelectedListener interface(As your first part of code) you have three methods to use.
void OnTabReselected(Tab tab);
void OnTabSelected(Tab tab);
void OnTabUnselected(Tab tab);
But when it comes to BottomNavigationView interface you have only two methods
void OnNavigationItemReselected
bool OnNavigationItemSelected
So we don't have built in OnTabUnselected method. Here you need to write custom code to make unseleted event.
I have tried this code without using custom renderer using 4 tabs pages & the xaml of tabbed written in MailPage.xaml file. First declare List<string> in App.xaml.cs file to store Title of all tabs
public static List<string> Titles {get;set;}
Add tabs pages title in above list from MainPage.xaml.cs file's OnAppearing method
protected override void OnAppearing()
{
for (int i = 0; i < this.Children.Count; i++)
{
App.Titles.Add(this.Children[i].Title);
}
}
Now go to your MyTabbedPage class in which is available in shared project.
public class MyTabbedPage : Xamarin.Forms.TabbedPage
{
string selectedTab = string.Empty;
string unSelectedTab = string.Empty;
bool isValid;
public MyTabbedPage()
{
On<Xamarin.Forms.PlatformConfiguration.Android>().SetToolbarPlacement(ToolbarPlacement.Bottom);
this.CurrentPageChanged += delegate
{
unSelectedTab = selectedTab;
selectedTab = CurrentPage.Title;
if (App.Titles != null)
isValid = true;
else
App.Titles = new List<string>();
if (isValid)
{
MoveTitles(selectedTab);
//Pass 0 index for tab selected & 1 for tab unselected
var unSelecteTabTitle = App.Titles[1];
//TabEvents(1); here you know which tab unseleted call any method
}
};
}
//This method is for to moving selected title on top of App.Titles list & unseleted tab title automatic shifts at index 1
void MoveTitles(string selected)
{
var holdTitles = App.Titles;
if (holdTitles.Count > 0)
{
int indexSel = holdTitles.FindIndex(x => x.StartsWith(selected));
holdTitles.RemoveAt(indexSel);
holdTitles.Insert(0, selected);
}
App.Titles = holdTitles;
}
}
Or you can make swith case like this
void TabEvents(int index)
{
switch (index)
{
case 0:
//Tab selected
break;
case 1:
//Tab unselected
break;
}
}
Few things I should mention that MainPage.xaml.cs file inheriting MyTabbedPage
public partial class MainPage : MyTabbedPage
Structure of MainPage.xaml file
<?xml version="1.0" encoding="utf-8" ?>
<local:MyTabbedPage
<TabbedPage.Children>
<NavigationPage Title="Browse">
</NavigationPage>
</TabbedPage.Children>
</local:MyTabbedPage>
Answer seems long but hope it help you.
As per G.Hakim's suggestion, I was able to do what I wanted to do by capturing the tab item I wanted to work on and do the necessary actions in BottomNavigationView.IOnNavigationItemSelectedListener.OnNavigationItemSelected.
namespace Japanese.Droid
{
public class BottomTabPageRenderer : TabbedPageRenderer, BottomNavigationView.IOnNavigationItemSelectedListener, BottomNavigationView.IOnNavigationItemReselectedListener
{
// same as above
bool BottomNavigationView.IOnNavigationItemSelectedListener.OnNavigationItemSelected(IMenuItem item)
{
base.OnNavigationItemSelected(item);
if(item.ItemId == 4 && item.TitleFormatted.ToString() == "Play")
{
item.SetTitle("Pause");
item.SetIcon(Resource.Drawable.ionicons_2_0_1_pause_outline_22);
App.pauseCard = false;
playTab = item;
}
if(item.ItemId !=4 && playTab.TitleFormatted.ToString() == "Pause")
{
playTab.SetTitle("Play");
playTab.SetIcon(Resource.Drawable.ionicons_2_0_1_play_outline_25);
App.pauseCard = true;
}
return true;
}
// same as above
}
}
I have programmed an Android App with fragments. A ListView fragment and a detail fragment.
What I wanna do is, if someone clicks inside the detail activity, a layout which is "View.Gone" should be "View.Visible". The code works without errors but nothing changed on the screen.
You can see it in Detail fragment code where a clik event on the ImageButton btn is.
What do i wrong?
What is the best way to update the detail screen? If someone has a small example or could write me where in my code I have to change what, it makes me happy :-)
Thanks a lot
Tom
The FragmentActivity:
public class CacheFragment extends SherlockFragmentActivity {
CacheListFragment f;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_cachelist);
f = new CacheListFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
f.setArguments(args);
}
Here's the Detail Fragment, where you can see whatt should happen if someone clicks on the Imagebutton:
public class CacheDetailsFragment extends SherlockFragment implements OnClickListener {
private CacheDetailsLoading cdLoad= new CacheDetailsLoading();
private static GeocacheDetails _cacheDetails = new GeocacheDetails();
private static GCRatingTyp _cacheVote = new GCRatingTyp();
private CacheDetailsUsing cdUsing = new CacheDetailsUsing();
private Activity _context;
private static CacheDetailsFragment f;
private View view;
/**
* Create a new instance of DetailsFragment, initialized to
* show the text at 'index'.
*/
public static CacheDetailsFragment newInstance(int index ) {
f = new CacheDetailsFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putInt("index", index);
f.setArguments(args);
return f;
}
public int getShownIndex() {
return getArguments().getInt("index", 0);
}
public void setCacheDetail(GeocacheDetails cacheDetails)
{
_cacheDetails = cacheDetails;
}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
return null;
}
Bundle bundle=getArguments();
_cacheVote= bundle.getParcelable("cacheVote");
int index = bundle.getInt("index");
_cacheDetails=StaticCacheListByGroup.getCacheList().get(index);
_context = getActivity();
_context.setTheme(R.style.Theme_Sherlock_Light_DarkActionBar);
view = inflater.inflate(R.layout.list_cachedetails, container,false);
((RelativeLayout) view.findViewById(R.id.relativeLoggingInfo)).setVisibility(View.GONE);
((RelativeLayout) view.findViewById(R.id.relativeKategorienInfo)).setVisibility(View.GONE);
ImageButton btn = (ImageButton) view.findViewById(R.id.description_expand);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
if(((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).getVisibility() == View.GONE)
{
((ImageButton) getActivity().findViewById(R.id.description_expand)).setBackgroundResource(R.drawable.navigation_collapse_dark);
((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).setVisibility(View.VISIBLE);
}
else
{
((ImageButton) getActivity().findViewById(R.id.description_expand)).setBackgroundResource(R.drawable.navigation_expand_dark);
((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).setVisibility(View.GONE);
}
});
return view;
}
}
Now the Listfragment:
public class CacheListFragment extends SherlockListFragment {
boolean isDualPane;
int mCurCheckPosition = 0;
private CacheListArrayAdapter _adapter;
private SharedPrefs _sp= new SharedPrefs();
private double latitude=0;
private double longitude=0;
#Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
latitude =Double.parseDouble(_sp.getSharedPrefs(getActivity(), LibraryDefaults.PROGRAMMNAME, "Latitude", "0"));
longitude =Double.parseDouble(_sp.getSharedPrefs(getActivity(), LibraryDefaults.PROGRAMMNAME, "Longitude", "0"));
// Check to see if we have a frame in which to embed the details
// fragment directly in the containing UI.
View detailsFrame = getActivity().findViewById(R.id.details);
isDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;
if(!isDualPane)
{
Bundle bundle = getActivity().getIntent().getExtras();
if(bundle != null && bundle.containsKey("Titel"))
((TextView) getActivity().findViewById(R.id.listtitle)).setText(bundle.getString("Titel"));
else
((TextView) getActivity().findViewById(R.id.listtitle)).setText(this.getResources().getString(R.string.caches_listtitle));
}
if (StaticCacheListByGroup.getCacheList() != null)
{
GeocachingCompass gc = new GeocachingCompass(getActivity());
_adapter = new CacheListArrayAdapter(getActivity(), StaticCacheListByGroup.getCacheList(), longitude,latitude);
_adapter.setActualCoordinates(new LatLng(latitude,longitude));
_adapter.setActualHeading(gc.getBearing(latitude,longitude));
if (_adapter != null)
setListAdapter(_adapter);
if (savedInstanceState != null) {
// Restore last state for checked position.
mCurCheckPosition = savedInstanceState.getInt("curChoice", 0);
}
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
getListView().setSoundEffectsEnabled(true);
getListView().setSmoothScrollbarEnabled(true);
getListView().setDrawSelectorOnTop(false);
getListView().setCacheColorHint(R.color.transparentBlack);
getListView().setDivider(getResources().getDrawable( R.color.divider));
getListView().setDividerHeight(5);
if (isDualPane) {
// In dual-pane mode, the list view highlights the selected item.
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
showDetails(mCurCheckPosition);
}
}
}
#Override
public void onResume() {
super.onResume();
GeocachingCompass gc = new GeocachingCompass(getActivity());
_adapter = new CacheListArrayAdapter(getActivity(), StaticCacheListByGroup.getCacheList(), longitude,latitude);
_adapter.setActualCoordinates(new LatLng(latitude,longitude));
_adapter.setActualHeading(gc.getBearing(latitude,longitude));
if (_adapter != null)
setListAdapter(_adapter);
}
#Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("curChoice", mCurCheckPosition);
}
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
showDetails(position);
}
/**
* Helper function to show the details of a selected item, either by
* displaying a fragment in-place in the current UI, or starting a
* whole new activity in which it is displayed.
*/
void showDetails(int index) {
mCurCheckPosition = index;
ReadGCVote getVote = new ReadGCVote();
GeocacheDetails cacheDetails = new GeocacheDetails();
cacheDetails=StaticCacheListByGroup.getCacheList().get(index);
if (isDualPane) {
// We can display everything in-place with fragments, so update
// the list to highlight the selected item and show the data.
getListView().setItemChecked(index, true);
// Check what fragment is currently shown, replace if needed.
CacheDetailsFragment details = (CacheDetailsFragment)
getActivity().getSupportFragmentManager().findFragmentById(R.id.details);
if (details == null || details.getShownIndex() != index) {
// Make new fragment to show this selection.
details = CacheDetailsFragment.newInstance(index);
// Execute a transaction, replacing any existing fragment
// with this one inside the frame.
FragmentTransaction ft = getActivity().getSupportFragmentManager().beginTransaction();
ft.replace(R.id.details, details);
ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
ft.commit();
}
} else {
// Otherwise we need to launch a new activity to display
Intent intent = new Intent();
intent.setClass(getActivity(), CacheDetailsActivity.class);
intent.putExtra("index", index);
intent.putExtra("cacheDetails",cacheDetails);
intent.putExtra("cacheVote",getVote.getGCVoteByCacheGuid( StaticGCVoteList.getCacheList(), cacheDetails.GetGUID()));
startActivity(intent);
}
}
}
I found the bug :-)
In the code snippet of the Detail Fragment ...
public void onClick(View v)
{
if(((RelativeLayout) getActivity().findViewById(R.id.relativeDescriptionInfo)).getVisibility() == View.GONE)
}
...you shouldn't use "getActivity()" use "view" from "view = inflater.inflate(R.layout.list_cachedetails, container,false);"
Then it will work
I am having a problem with EditField.
I have created an EditField using this code under a "HorizontalFieldManager".
EditField nameEditLabel = new EditField (EditField.FOCUSABLE
| EditField.NO_NEWLINE | EditField.FIELD_RIGHT);
nameEditLabel.setMaxSize(25);
nameEditLabel.setMargin(50, 0, 0, 80);
horizontalFldManager.add(nameEditLabel);
Problem now is, On the screen, it doesn't show the line of the field. Something like, basically a Field contain "Name: ----------------------" such line in other platform controls, which is not showing here on the screen. What is the problem here? Is it default in API support? If no, how do i resolve it?
Note: This line is getting created only when i write something on the field.
Thanks.
If you want to have this "----" in case EditField is empty, extend it to implement check value logic:
class LabelFieldEmpty extends EditField {
String mEmptyText = "";
public LabelFieldEmpty(long style) {
super(style);
}
public void setEmptyText(String emptyText) {
mEmptyText = emptyText;
}
public String getEmptyText() {
return mEmptyText;
}
protected boolean keyChar(char key, int status, int time) {
if (null != mEmptyText)
if (getText().equalsIgnoreCase(mEmptyText)) {
setText(String.valueOf(key));
return true;
}
return super.keyChar(key, status, time);
}
protected void fieldChangeNotify(int context) {
if (null != mEmptyText)
if (!getText().equalsIgnoreCase(mEmptyText))
if (getText().equalsIgnoreCase("")) {
setText(mEmptyText);
setCursorPosition(0);
}
super.fieldChangeNotify(context);
}
}
Example of use:
class Scr extends MainScreen {
public Scr() {
String label = "Name:";
String empty = "-------------------------";
int maxChars = 25;
long style = EditField.FOCUSABLE | EditField.NO_NEWLINE
| EditField.FIELD_RIGHT;
LabelFieldEmpty nameEdit = new LabelFieldEmpty(style);
nameEdit.setLabel(label);
nameEdit.setMaxSize(maxChars);
nameEdit.setMargin(50, 0, 0, 80);
nameEdit.setEmptyText(empty);
add(nameEdit);
}
}
I have created a ButtonField & a BitmapField like..
public class MyCanvas extends MainScreen implements FieldChangeListener
{
HorizontalFieldManager hfm;
private Bitmap startBitmap;
private BitmapField startBitmapField;
private ButtonField okButton;
MyCanvas()
{
hfm = new HorizontalFIeldManager();
startBitmap = Bitmap.getBitmapResource("start.png");
startBitmapField = new BitmapField(startBitmap);
startBitmapField.setChangeListener(this);
hfm.add(startBitmapField);
okButton = new ButtonField("Ok", ButtonField.CONSUME_CLICK | ButtonField.NEVER_DIRTY);
okButton.setChangeListener(this);
hfm.add(okButton);
}
public void fieldChanged(Field field, int context)
{
if(field == startBitmapField)
{
System.out.println("Touched START...");
}
else if(field == okButton)
{
System.out.println("Touched Ok...");
}
}
}
But the ButtonField or BitmapField click is not happening in Blackberry 4.7 simulator.
I want to build it for Blackberry Storm so I m using Blackberry 4.7
How to handle click/touch events for ButtonField & BitmapField for Blackberry Storm?
I m creating the ButtonField & BitmapFields as
okButtonField = new ButtonField("Ok", BitmapField.HIGHLIGHT_SELECT | BitmapField.FOCUSABLE);
startBitmapField = new BitmapField(startBitmap, BitmapField.HIGHLIGHT_SELECT | BitmapField.FOCUSABLE);
Its working with..
protected boolean touchEvent(TouchEvent event)
{
switch( event.getEvent() )
{
case TouchEvent.DOWN: ........
return true;
case TouchEvent.MOVE: .......
return true;
case TouchEvent.UP: ........
return true;
case TouchEvent.CLICK:
if(deleteButton.isFocus())
{
System.out.println("Touched DEL ..........");
}
else if(okButton.isFocus())
{
System.out.println("Touched OK ..........");
}
else if(startBitmapField.isFocus())
{
System.out.println("Touched START ..........");
}
return true;
}
return false;
}
but everytime the same button is invoked which is having focus.
Means if "Ok" button is having focus then even though u clicked on "Delete" button "Ok" button is called.
So how to change the focus on Button Click? means whichever ButtonField or BitmapField is clicked, should get the focus?
is there any method to check "button.isClicked() like button.isFocus() " ?
First of all, don't forget to add hfm to screen ;)
Actually button click works fine.
Now, to make bitmap click works as well, implement protected boolean touchEvent(TouchEvent message) for your BitmapField. It will be better to create extended class:
class MyCanvas extends MainScreen implements FieldChangeListener {
HorizontalFieldManager hfm;
private Bitmap startBitmap;
private BitmapField startBitmapField;
private ButtonField okButton;
private ButtonField cancelButton;
MyCanvas() {
hfm = new HorizontalFieldManager();
add(hfm);
startBitmap = Bitmap.getBitmapResource("start.png");
startBitmapField = new TouchBitmapField(startBitmap);
startBitmapField.setChangeListener(this);
hfm.add(startBitmapField);
okButton = new ButtonField("Ok", ButtonField.CONSUME_CLICK
| ButtonField.NEVER_DIRTY);
okButton.setChangeListener(this);
hfm.add(okButton);
cancelButton = new ButtonField("Cancel", ButtonField.CONSUME_CLICK
| ButtonField.NEVER_DIRTY);
cancelButton.setChangeListener(this);
hfm.add(cancelButton);
}
public void fieldChanged(Field field, int context) {
if (field == startBitmapField) {
System.out.println("Touched START...");
} else if (field == okButton) {
System.out.println("Touched Ok...");
} else if (field == cancelButton) {
System.out.println("Touched Cancel...");
}
}
}
class TouchBitmapField extends BitmapField {
public TouchBitmapField(Bitmap startBitmap) {
super(startBitmap);
}
protected boolean touchEvent(TouchEvent message) {
if (TouchEvent.CLICK == message.getEvent()) {
FieldChangeListener listener = getChangeListener();
if (null != listener)
listener.fieldChanged(this, 1);
}
return super.touchEvent(message);
}
}