Here is my code snippet :
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Toast.makeText(MainActivity.this, "clicked " +
position, Toast.LENGTH_SHORT).show();
}
You can follow this link:
ArrayList<String> list;
listView.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1, int position,
long arg3)
{
ArrayList<String> newList=new ArrayList<String>();
newList=list.get(position);//Text will be featch according to the position
String name=newList.get(0).toString();
}
}
Related
private ArrayList<MFRList> list;
private ArrayList<STUList> list1 = new ArrayList<STUList>();
public ResultPage(PageParameters params) throws APIException {
Form form = new Form("form");
PageableListView view = new PageableListView("view", list, 10) {
#Override
public void onConfigure() {
super.onConfigure();
setVisible(list.size() > 0);
}
#Override
protected void populateItem(ListItem item) {
final StuList stu= (StuList) item.getModelObject();
item.add(new CheckBox("check", item.getModel()));
item.add(new Label("name", stu.getName()));
item.add(new Label("num", stu.getNumber()));
item.add(new Label("age", stu.getAge()));
item.add(new Label("sex", stu.getSex()));
}
};
Button backtosearchbutton = new Button("backtosearchbutton") {
#Override
public void onSubmit() {
setResponsePage(SearchPage.class);
}
}.setDefaultFormProcessing(false);
Button groupcheckbutton = new Button("groupcheckbutton") {
#Override
public void onSubmit() {
}
}.setDefaultFormProcessing(false);
Button groupuncheckbutton = new Button("groupuncheckbutton") {
#Override
public void onSubmit() {
}
}.setDefaultFormProcessing(false);
Button submitselectionbutton = new Button("submitselectionbutton") {
#Override
public void onSubmit() {
}
}.setDefaultFormProcessing(true);
form.add(view);
form.add(backtosearchbutton);
form.add(submitselectionbutton);
form.add(groupuncheckbutton);
form.add(groupcheckbutton);
add(form);
add(new CustomPagingNavigator("navigator", view));
how are the selected records stored and how can i use it. i understand that on form submission these records are submitted but i am not clear on how and where.
and my pojo is
public class MFRList implements Serializable {
private String name;
private String num;
private String age;
private String sex;
private Boolean selected = Boolean.FALSE;
public String getName() {
return Name;
}
public void setName(String Name) {
this.Name = Name;
}
public String getnum() {
return num;
}
public void setnum(String num) {
this.num = num;
}
public String getAge() {
return age;
}
public void setsex(String sex) {
this.sex= sex;
}
public String getsex() {
return sex;
}
public void setage(String age) {
this.age = age;
}
public Boolean getSelected() {
return selected;
}
public void setSelected(Boolean selected) {
this.selected = selected;
}
}
where is the selected row saved and how can i retrieve and use it.
Thanks in Advance
You should use a CheckGroup with Checks instead:
public ResultPage(PageParameters params) throws APIException {
Form form = new Form("form");
CheckGroup selection = new CheckGroup("selection", new ArrayList());
selection.setRenderBodyOnly(false);
form.add(selection);
PageableListView view = new PageableListView("view", list, 10) {
#Override
public void onConfigure() {
super.onConfigure();
setVisible(list.size() > 0);
}
#Override
protected void populateItem(ListItem item) {
final StuList stu= (StuList) item.getModelObject();
item.add(new Check("check", item.getModel()));
item.add(new Label("name", stu.getName()));
item.add(new Label("num", stu.getNumber()));
item.add(new Label("age", stu.getAge()));
item.add(new Label("sex", stu.getSex()));
}
};
selection.add(view);
This way the arrayList passed to the CheckGroup constructor will always contain the selected objects.
I got what i was trying to acheive but i am not su7re if it is optimal solution.
I created my own Model and added the object to a list when check box is selected.
class SelectedCheckBoxModel extends AbstractCheckBoxModel {
private final STUList info;
private ArrayList<STUList> list1;
public SelectedCheckBoxModel(STUList info, ArrayList<STUList> list1) {
super();
this.info = info;
this.list1 = list1;
}
#Override
public boolean isSelected() {
// TODO Auto-generated method stub
return list1.contains(info);
}
#Override
public void select() {
// TODO Auto-generated method stub
list1.add(info);
}
#Override
public void unselect() {
// TODO Auto-generated method stub
list1.remove(info);
}
and i called it in my listview
check = new CheckBox("check", new SelectedCheckBoxModel(stu, list1));
item.add(check);
if this is not optimal please suggest
Thank You
My code does update the ListView when onItemClick is fired but only if I replace the line "inside the onItemClick method"
categoryAdapter.notifyDataSetChanged();
with the line
lv.setAdapter(new CategoryAdapter(categories));
Should I replace the line as indicated above or the notifyDataSetChanged is what I should use? since the docs say that it should update the view as well.
besides, when I do that, the app runs but hitting the back button shuts the app down instead of go back to the last screen which what I like to see.
public class MainActivity extends ActionBarActivity {
ListView lv;
String[] categories = null;
private static String[] failCategories = {"a","b","c};
private static String[] category_a= { "a1","a2"};
CategoryAdapter categoryAdapter = null;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_categories);
lv = (ListView) findViewById(R.id.lvCategories);
categories = failCategories; //initial set
categoryAdapter = new CategoryAdapter(categories);
lv.setAdapter(categoryAdapter);
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (position == 0){
categories = category_a;
categoryAdapter.notifyDataSetChanged();
}
}
});
}
private class CategoryAdapter extends ArrayAdapter<String>{
CategoryAdapter(String[] objects) {
super(getBaseContext(), R.layout.activity_categories,R.id.tvCategory, objects);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
convertView = super.getView(position, convertView, parent);
return convertView;
}
}
}
please try this part of code inside your code if you want to update respected item only, make sure category_a has equal items
Version 1
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
categoryAdapter.insert(position,category_a[position]);
categoryAdapter.notifyDataSetChanged();
}
Version 2
if you want to update whole listview with all items in category_a then
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
categoryAdapter.clear();
categoryAdapter.addAll(category_a);
categoryAdapter.notifyDataSetChanged();
}
I want to create an expandable list view Keeping some child visible,where as I want to show rest on click.
Please suggest what is the best approach in such scenario,if any custom element or any tutorial as such.
Many Thanks,
This will be helpful to you.
Adapter class:-
public class MyExpandableAdapter extends BaseExpandableListAdapter {
private Activity activity;
private ArrayList<Object> childtems;
private LayoutInflater inflater;
private ArrayList<String> parentItems, child;
public MyExpandableAdapter(ArrayList<String> parents,
ArrayList<Object> childern) {
this.parentItems = parents;
this.childtems = childern;
}
public void setInflater(LayoutInflater inflater, Activity activity) {
this.inflater = inflater;
this.activity = activity;
}
#Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
child = (ArrayList<String>) childtems.get(groupPosition);
TextView textView = null;
if (convertView == null) {
convertView = inflater.inflate(R.layout.group, null);
}
textView = (TextView) convertView.findViewById(R.id.textView1);
textView.setText(child.get(childPosition));
convertView.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View view) {
Toast.makeText(activity, child.get(childPosition),
Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(R.layout.row, null);
}
((CheckedTextView) convertView).setText(parentItems
.get(groupPosition));
((CheckedTextView) convertView).setChecked(isExpanded);
return convertView;
}
#Override
public Object getChild(int groupPosition, int childPosition) {
return null;
}
#Override
public long getChildId(int groupPosition, int childPosition) {
return 0;
}
#Override
public int getChildrenCount(int groupPosition) {
return ((ArrayList<String>) childtems.get(groupPosition)).size();
}
#Override
public Object getGroup(int groupPosition) {
return null;
}
#Override
public int getGroupCount() {
return parentItems.size();
}
#Override
public void onGroupCollapsed(int groupPosition) {
super.onGroupCollapsed(groupPosition);
}
#Override
public void onGroupExpanded(int groupPosition) {
super.onGroupExpanded(groupPosition);
}
#Override
public long getGroupId(int groupPosition) {
return 0;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return false;
}
}
MainActivity is here.
public class MainActivity extends ExpandableListActivity {
private ArrayList<String> parentItems = new ArrayList<String>();
private ArrayList<Object> childItems = new ArrayList<Object>();
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// this is not really necessary as ExpandableListActivity contains
// an ExpandableList
// setContentView(R.layout.main);
ExpandableListView expandableList = getExpandableListView(); // you
// can
// use
// (ExpandableListView)
// findViewById(R.id.list)
expandableList.setDividerHeight(2);
expandableList.setGroupIndicator(null);
expandableList.setClickable(true);
setGroupParents();
setChildData();
MyExpandableAdapter adapter = new MyExpandableAdapter(parentItems,
childItems);
adapter.setInflater(
(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE),
this);
expandableList.setAdapter(adapter);
expandableList.setOnChildClickListener(this);
}
public void setGroupParents() {
parentItems.add("Android");
parentItems.add("Core Java");
parentItems.add("Desktop Java");
parentItems.add("Enterprise Java");
}
public void setChildData() {
// Android
ArrayList<String> child = new ArrayList<String>();
child.add("Core");
child.add("Games");
childItems.add(child);
// Core Java
child = new ArrayList<String>();
child.add("Apache");
child.add("Applet");
child.add("AspectJ");
child.add("Beans");
child.add("Crypto");
childItems.add(child);
// Desktop Java
child = new ArrayList<String>();
child.add("Accessibility");
child.add("AWT");
child.add("ImageIO");
child.add("Print");
childItems.add(child);
// Enterprise Java
child = new ArrayList<String>();
child.add("EJB3");
child.add("GWT");
child.add("Hibernate");
child.add("JSP");
childItems.add(child);
}
}
At start open the groups you want to be fixed then implement this , specify the the groups postion
expandableList.setOnGroupClickListener(new OnGroupClickListener() {
#Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
if(groupPosition==your group position){
return true; // This way the expander cannot be collapsed
}else{
return false;
}
}
});
Override onGroupCollapsed and onGroupExpanded of the ExpandableListView based on your needs.
EDITED: In addition: implement the mentioned setOnGroupClickListener, store the groupIDs within your view, and suppress the collapsing in onGroupCollapsed.
I am trying to add a hyperlink in celltable and on clicking on that link i want to call a method.
with the below code i am getting a hyperlink in my celltable correctly but I am not able to call a method by clicking on the link , when i click the link it takes me to the previous page.
Any Solution
Hyperlink link = new Hyperlink("Delete","");
Column<EmployerJobs, Hyperlink> linkColumn =
new Column<EmployerJobs, Hyperlink>(new HyperLinkCell()) {
#Override
public Hyperlink getValue(EmployerJobs list) {
link.addClickHandler(new ClickHandler() {
public void onClick(ClickEvent event) {
deleteJobs(list);
}
});
return link;
}
});
Instead of a HyperlinkCell you can either use a ClickableTextCell, a ButtonCell or an ActionCell.
ClickableTextCell:
Column<EmployerJobs, String> linkColumn =
new Column<EmployerJobs, String>(new ClickableTextCell()) {
#Override
public String getValue(EmployerJobs object) {
return TEXT_TO_DISPLAY;
}
},'linkheadertext');
linkColumn.setFieldUpdater(new FieldUpdater<EmployerJobs, String>() {
#Override
public void update(int index, EmployerJobs object, String value) {
deleteJobs(object);
}
});
ButtonCell:
Column<EmployerJobs, String> buttonColumn =
new Column<EmployerJobs, String>(new ButtonCell()) {
#Override
public String getValue(EmployerJobs object) {
return TEXT_TO_DISPLAY;
}
},'linkheadertext');
buttonColumn.setFieldUpdater(new FieldUpdater<EmployerJobs, String>() {
#Override
public void update(int index, EmployerJobs object, String value) {
deleteJobs(object);
}
});
ActionCell:
Column<EmployerJobs, EmployerJobs> actionColumn =
new Column<EmployerJobs, EmployerJobs>(new ActionCell<EmployerJobs>("Click Me",
new ActionCell.Delegate<EmployerJobs>() {
#Override
public void execute(EmployerJobs jobs) {
deleteJobs(jobs);
}
})
{
#Override
public EmployerJobs getValue(EmployerJobs object) {
return object;
}
},'linkheadertext');
Check out the CellSample showcase for more infos.
I have post my answer on the similar thread:
How can I render a ClickableTextCell as an anchor in a GWT CellTable?
but for those who bookmarked this thread:
This is what you need
public class ClickableSafeHtmlCell extends AbstractCell<SafeHtml> {
/**
* Construct a new ClickableSafeHtmlCell.
*/
public ClickableSafeHtmlCell() {
super("click", "keydown");
}
#Override
public void onBrowserEvent(Context context, Element parent, SafeHtml value, NativeEvent event,
ValueUpdater<SafeHtml> valueUpdater) {
super.onBrowserEvent(context, parent, value, event, valueUpdater);
if ("click".equals(event.getType())) {
onEnterKeyDown(context, parent, value, event, valueUpdater);
}
}
#Override
protected void onEnterKeyDown(Context context, Element parent, SafeHtml value,
NativeEvent event, ValueUpdater<SafeHtml> valueUpdater) {
if (valueUpdater != null) {
valueUpdater.update(value);
}
}
#Override
public void render(Context context, SafeHtml value, SafeHtmlBuilder sb) {
if (value != null) {
sb.append(value);
}
}
And then usage:
Column<YourProxy, SafeHtml> nameColumn = new Column<YourProxy, SafeHtml>(
new ClickableSafeHtmlCell()) {
#Override
public SafeHtml getValue(YourProxy object) {
SafeHtmlBuilder sb = new SafeHtmlBuilder();
sb.appendHtmlConstant("<a>");
sb.appendEscaped(object.getName());
sb.appendHtmlConstant("</a>");
return sb.toSafeHtml();
}
};
nameColumn.setFieldUpdater(new FieldUpdater<YourProxy, SafeHtml>() {
#Override
public void update(int index, YourProxy object, SafeHtml value) {
Window.alert("You have clicked: " + object.getName());
}
});
As suggested in above answer you can use updater when you want inplace editing. But if you want to capture a click to perform some action, you can do it using ClickableTextCell.
ClickableTextCell employerJobsCell = new ClickableTextCell();
Column<EmployerJobs, String> employerJobsColumn = new Column<EmployerJobs, String>(employerJobsCell) {
#Override
public String getValue(EmployerJobs object) {
return object.getWhichStringToDisplay();
}
#Override
public void render(Context context, EmployerJobs object, SafeHtmlBuilder sb) {
//this method is optional, can be used if the display needs to be customized
}
#Override
public void onBrowserEvent(Context context, Element elem, EmployerJobs object, NativeEvent event) {
super.onBrowserEvent(context, elem, object, event);
Event evt = Event.as(event);
int eventType = evt.getTypeInt();
if (eventType == Event.ONCLICK) {
//call delete job when cell is clicked
deleteJobs(object);
}
}
};
dataGrid.addColumn(employerJobsColumn, "The header goes here");
hi all
i need a simple example show me how to add column of ClickableTextCells to cellTable
thanks.
Column<YerValueObject, String> newCol = new Column<YerValueObject, String>(new ClickableTextCell()) {
#Override
public String getValue(YearValueObject obj) {
return obj.someMethod();
}
};
newCol.setFieldUpdater(new FieldUpdater<YerValueObject, String>() {
#Override
public void update(int index, YerValueObject obj, String value) {
//do whatever you need to here...
}
});
table.addColumn(newCol, "ClickColumn");
this is the solution if you need to add clickableTextCell to cellTable
// ClickableTextCell
ClickableTextCell anchorcolumn = new ClickableTextCell();
table.addColumn(addColumn(anchorcolumn, new GetValue<String>() {
public String getValue(Contact contact) {
return "Click " + contact.anchor;
}
}, new FieldUpdater<Contact, String>() {
public void update(int index, Contact object, String value) {
Window.alert("You clicked " + object.name);
}
}), "Anchor");
private <C> Column<Contact, C> addColumn(Cell<C> cell,final GetValue<C> getter,
FieldUpdater<Contact, C> fieldUpdater) {
Column<Contact, C> column = new Column<Contact, C>(cell) {
#Override
public C getValue(Contact object) {
return getter.getValue(object);
}
};
column.setFieldUpdater(fieldUpdater);
return column;
}
private static interface GetValue<C> {
C getValue(Contact contact);
}
// A simple data type that represents a contact.
private static class Contact {
private final String address;
private final String name;
private final String anchor;
public Contact(String name, String address, String anchor) {
this.name = name;
this.address = address;
this.anchor = anchor;
}
}
Create a Column overriding the onBrowserEvent method.
Like this:
new Column<T, String>(new TextCell()) {
#Override
public String getValue(T object) {
return object.getProperty();
}
#Override
public void onBrowserEvent(Context context, Element elem, T object, NativeEvent event) {
// TODO You can check which event you want to catch
Window.open("http://www.stackoverflow.com", "StackOverFlow", "");
}
};