I'm having an issue with a long press on a row to get highlighted.
I looked over how to handle the single click to lead to another activity and a long press to get the contextual action bar comes up. I decided to switch the listview choice by ListView.CHOICE_MODE_MULTIPLE_MODAL and ListView.CHOICE_MODE_NONE to let the built in android methods to do their work on selected rows. The single click is working as it is intended.
The multiple modal is working and the contextual action bar is showing the number of the notes selected yet the rows aren't highlighted. I have checked the theme and it doesn't work either for Theme.AppCompat and Theme.AppCompat.Light.
Here are the code -
Classes
MainActivity extends AppCompatActivity {}
ObjectListFragment extends ListFragment implements
AdapterView.OnItemLongClickListener, AbsListView.MultiChoiceModeListener {}
NoteListAdapter extends ArrayAdapter<NoteTO> {}
initialization of listeners and other objects in ListFragment
//get the data
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
LogUtils.LOGD(getClass().getSimpleName(), "onViewCreated");
ListView listView = getListView();
listView.setOnItemLongClickListener(this);
listView.setMultiChoiceModeListener(this);
int choiceMode = (savedInstanceState == null ? ListView.CHOICE_MODE_NONE : savedInstanceState.getInt(STATE_CHOICE_MODE));
listView.setChoiceMode(choiceMode);
}
Action mode methods, long press method and private methods
#Override
public void onListItemClick(ListView l, View v, int position, long id) {
l.setItemChecked(position, true);
NoteTO note = (NoteTO) l.getItemAtPosition(position);
Intent i = new Intent(getActivity(), NoteActivity.class);
NotePreferences.setNote(getActivity(), note);
AppPreferences.setActionFlag(getActivity(), AppConstants.ACTION_UPDATE);
startActivityForResult(i, 1);
}
#Override
public void onItemCheckedStateChanged(ActionMode actionMode, int i, long l, boolean b) {
if (mActiveMode != null) {
updateSubtitle(actionMode);
}
}
#Override
public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
MenuInflater inflater = getActivity().getMenuInflater();
inflater.inflate(R.menu.contextual_menu, menu);
this.mActiveMode = actionMode;
updateSubtitle(mActiveMode);
return true;
}
#Override
public boolean onPrepareActionMode(ActionMode actionMode, Menu menu) {
return false;
}
#Override
public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
boolean result = performActions(menuItem);
updateSubtitle(mActiveMode);
return(result);
}
#Override
public void onDestroyActionMode(ActionMode actionMode) {
if (mActiveMode != null) {
mActiveMode = null;
getListView().setChoiceMode(ListView.CHOICE_MODE_NONE);
getListView().setAdapter(getListView().getAdapter());
}
}
public boolean performActions(MenuItem item) {
List<NoteTO> list = listAdapter.getList();
Set<Integer> positionSet = listAdapter.getCurrentCheckedPosition();
Integer[] positions = listAdapter.getCurrentCheckedPosition().toArray(new Integer[positionSet.size()]);
if(item.getItemId() == R.id.item_delete) {
List<NoteTO> notesToBeDeleted = new ArrayList<NoteTO>();
String text = "";
for(int i = 0; i < positions.length; i++) {
NoteTO note = (NoteTO) list.get(positions[i]);
notesToBeDeleted.add(note);
}
task = new ObjectListFragment.deleteNotesTask().execute(notesToBeDeleted);
return true;
}
else if(item.getItemId() == R.id.item_share) {
String text = "";
for(int i = 0; i < positions.length; i++) {
NoteTO note = (NoteTO) list.get(positions[i]);
text = text + note.getBody() + "\r\n"+ "\r\n";
}
shareNotes(text);
return true;
}
return false;
}
private void updateSubtitle(ActionMode mode) {
mode.setSubtitle("(" + getListView().getCheckedItemCount() + ")");
}
#Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position, long id) {
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
getListView().setItemChecked(position, true);
return(true);
}
Adapter - there isn't any code that overwrite up the selectors of the rows.
#NonNull
#Override
public View getView(int position, #Nullable View convertView, #NonNull ViewGroup parent) {
View row = super.getView(position, convertView, parent);
NoteHolder holder = (NoteHolder) row.getTag();
if(holder == null) {
holder = new NoteHolder(row);
row.setTag(holder);
}
NoteTO note = getItem(position);
if(mSettings.getListSingleLine() == 0) {
holder.textviewNote.setEllipsize(null);
holder.textviewNote.setSingleLine(false);
}
else {
holder.textviewNote.setEllipsize(TextUtils.TruncateAt.END);
holder.textviewNote.setSingleLine();
}
holder.textviewNote.setText(note.getBody());
holder.textviewNote.setTextSize(getmSettings().getListViewTextSize());
holder.textviewNote.setTypeface(getmSettings().getGeneralFontStyleTypeFace());
//holder.textviewNote.setBackgroundColor(ContextCompat.getColor(context, android.R.color.background_dark));
//holder.textviewNote.setBackground(selector);
//arraylist has containers to get the boolean of the position
if (mSelection.get(position) != null) {
//holder.textviewNote.setSelected(true);
//holder.textviewNote.setBackgroundColor(ContextCompat.getColor(context, android.R.color.holo_blue_light));
//holder.textviewNote.setTextColor(mSettings.getListViewTextColor());
//holder.textviewNote.setBackground(selector);
}
return row;
}
I found the solution, I overlooked the styles where will get the highlighted rows -
<item name="android:background">?android:attr/activatedBackgroundIndicator</item>
Thanks to
Highlight custom listview item when long click
and
Commonsware - The Busy Coder's Guide to Android Development
Related
This is the first grid where I selected
the problem is:
when I scroll down, here random images are getting selected
I used glide library for grid view. Here's the Java Code for Multiple selection:
mgridview.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
#Override
public void onItemCheckedStateChanged(ActionMode actionMode, int i, long l, boolean b) {
if (sel_tab2_images.contains(tab2_images.get(i))) {
sel_count = sel_count - 1;
actionMode.setTitle(sel_count + " images selected");
sel_tab2_images.remove(tab2_images.get(i));
viewprev = mgridview.getChildAt(i - mgridview.getFirstVisiblePosition());
viewprev.setBackgroundColor(Color.WHITE);
viewprev.setAlpha(1f);
if(Build.VERSION.SDK_INT>=23) {
viewprev.setForeground(null);
}
} else {
sel_count = sel_count + 1;
actionMode.setTitle(sel_count + " images selected");
sel_tab2_images.add(tab2_images.get(i));
viewprev = mgridview.getChildAt(i - mgridview.getFirstVisiblePosition());
if (viewprev != null) {
viewprev.setAlpha(0.5f);
//ImageView imageView=viewprev.findViewById(R.id.tick);
//Resource(R.drawable.ic_save_black_24dp);
if(Build.VERSION.SDK_INT>=23) {
viewprev.setForeground(getResources().getDrawable(R.drawable.ic_check_white_24dp));
}
}
else
Toast.makeText(getContext(), "Error Occured", Toast.LENGTH_SHORT).show();
}
}
#Override
public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
MenuInflater inflater = actionMode.getMenuInflater();
inflater.inflate(R.menu.context_action_bar, menu);
return true;
}
#Override
public boolean onPrepareActionMode(ActionMode actionMode, Menu menu) {
return false;
}
#Override
public boolean onActionItemClicked(ActionMode actionMode, MenuItem menuItem) {
int del_count = 0;
switch (menuItem.getItemId()) {
case R.id.delete_action_bar:
for (String sel : sel_tab2_images) {
file = new File(sel);
if (file.exists()) {
file.delete();
tab2_images.remove(sel);
if (tab1_fragment.tab1_images.contains(sel)) {
tab1_fragment.tab1_images.remove(sel);
}
if (tab3_fragment.spam_list.contains(sel)) {
tab3_fragment.spam_list.remove(sel);
}
UpdateGallery(sel);
/*
int pos_1=tab2_images.indexOf(sel);
tab2_images.remove(sel);
adapter.notifyDataSetChanged();
viewprev=mgridview.getChildAt(pos_1);
viewprev.setBackgroundColor(Color.WHITE);
*/
del_count++;
}
}
adapter = new ImageAdapterGridView(getContext());
mgridview.setAdapter(adapter);
Toast.makeText(getContext(), del_count + " images deleted", Toast.LENGTH_SHORT).show();
sel_count = 0;
sel_tab2_images.clear();
actionMode.finish();
break;
}
return true;
}
#Override
public void onDestroyActionMode(ActionMode actionMode) {
}
});
return view;
}
Below is the java code for Grid View. I also tried #overriding getItem and getItemId methods but it's not working. This is my first app and I'm still learning. Please help me to fix this!
public class ImageAdapterGridView extends BaseAdapter {
private Context mcontext;
public ImageAdapterGridView(Context c) {
mcontext = c;
}
public int getCount() {
return tab2_images.size();
}
public Object getItem(int position) {
return position;
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertview, ViewGroup parent) {
ImageView imageView;
if(convertview==null){
imageView= new ImageView(mcontext);
imageView.setLayoutParams(new GridView.LayoutParams(280,320));
imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
imageView.setPadding(16,16,16,16);
}
else{
imageView=(ImageView)convertview;
}
Glide.with(tab2_fragment.this).load("file://" + tab2_images.get(position))
.diskCacheStrategy(DiskCacheStrategy.RESULT)
.skipMemoryCache(true)
.into(imageView);
return imageView;
}
}
#Override
public void onResume() {
super.onResume();
adapter = new ImageAdapterGridView(getContext());
mgridview.setAdapter(adapter);
}
}
You're relying on view in a list. In list views are being reused as they get off screen. So to get this done you have to declare a boolean isSelected per each item (so the best place to do this is in your item model which holds all each grid properties) and make it true as the user select your grid item and always update your view based on that boolean not the view.
Currently your model is holding just the url of your images. If you need to save the isSelected boolean there you should build your model object like:
public class ImageModel {
public String url;
public boolean isSelected;
}
And then use the field objects in your grid list:
public void onItemCheckedStateChanged(ActionMode actionMode, int i, long l, boolean b) {
ImageModel image = tab2_images.get(i);
if (image.isSelected) {
// Image is selected you need to deselect it
} else {
// Image is not selected you need to select it
}
}
In your adapter:
public View getView(int position, View convertview, ViewGroup parent) {
// Your view construction code
ImageModel image = tab2_images.get(i);
if (image.isSelected) {
// Show your check image view
} else {
// Image is not selected yet, hide your check image view
}
}
I hope this helps but grid view is considered deprecated, try to consider using RecyclerView which is more efficient and fast.
I have a listview in fragment and my problem is when I select items on listview then it's fine, but when I scroll my listview then item's background is checked for another items, but I don't want that. You can see my image, first I select 3 items (Browser, Calendar, Contact), when I scroll listview then 2 items (Dev tool, Camera) have a changed background, if I continue scroll then listview has more items like that.
Here is my code:
#SuppressLint("NewApi") public class Tab2 extends Fragment{
private PackageManager packageManager = null;
private List<ApplicationInfo> applist = null;
public static ApplicationAdapter listadaptor = null;
public static ListView list;
private ActionMode acMode;
private int counterChecked = 0;
private SparseBooleanArray sp;
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.tab2test,container,false);
list = (ListView)v.findViewById(R.id.list_view2);
list.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
list.setItemsCanFocus(false);
packageManager = getActivity().getPackageManager();
applist = checkForLaunchIntent(packageManager.getInstalledApplications(PackageManager.GET_META_DATA));
listadaptor = new ApplicationAdapter(getActivity().getApplicationContext(),R.layout.snippet_list_row, applist);
list.setAdapter(listadaptor);
sp = list.getCheckedItemPositions();
list.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
//Here i set item's color and unselected color
view.setBackgroundColor(sp.get(position)? 0x9934B5E4: Color.WHITE);
if(counterChecked<1){
acMode = ((AppCompatActivity) getActivity()).startSupportActionMode(mActionModeCallback);
}
String str="";
int i=0;
for(i=0;i<sp.size();i++)
{
if(sp.valueAt(i)){
str+=sp.keyAt(i)+",";
}
}
if(list.isItemChecked(position)){
Log.d("list1", String.valueOf(position));
list.setItemChecked(position, true);
counterChecked++;
}else{
list.setItemChecked(position, false);
counterChecked--;
}
if(counterChecked<1){
mActionModeCallback.onDestroyActionMode(acMode);
}
}
});
return v;
}
private List<ApplicationInfo> checkForLaunchIntent(List<ApplicationInfo> list) {
ArrayList<ApplicationInfo> applist = new ArrayList<ApplicationInfo>();
for (ApplicationInfo info : list) {
try {
if(isSystemPackage(info)){
if (null != packageManager.getLaunchIntentForPackage(info.packageName)) {
applist.add(info);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
return applist;
}
private boolean isSystemPackage(ApplicationInfo AInfo) {
return ((AInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0) ? true
: false;
}
private ActionMode.Callback mActionModeCallback = new ActionMode.Callback(){
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.cab_menu, menu);
MainActivity.toolbar.setVisibility(View.GONE);
return true;
}
#Override
public void onDestroyActionMode(ActionMode mode) {
mode.finish();
MainActivity.toolbar.setVisibility(View.VISIBLE);
}
#Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
return true;
}
#Override
public boolean onPrepareActionMode(ActionMode arg0, Menu arg1) {
// TODO Auto-generated method stub
return false;
}
};
}
You actually trigger OnItemClickListener when scrolling which causes a multiple select for items that you didn't want to include.
A better approach would be using a checkBox inside your listView Item and mark the item as selected when the check box is checked: check out this link on how to Get Selected Item Using Checkbox in Listview.
If you incest on using onClick then you can implement longClickListener on your listView Items which may prevent get item selected when scrolling but my advice to you is to go with checkBoxes.
OnLongClickListener Implementation:
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
public boolean onItemLongClick(AdapterView<?> arg0, View v,
int index, long arg3) {
// TODO Auto-generated method stub
String str=listView.getItemAtPosition(index).toString();
return true;
}
});
I'm trying to create ListView with installed apps. User selects apps inside wizard (basically viewpager).
My plan is to create a list of custom views (icon, name, package) that will allow to select more than one item. Unfortunatelly checkboxes won't work, because I need this place for another functionality. So, I'll change the background of the element.
So, I found a solution on stackoverflow and changed it a bit.
Firstly - main activity with this list.
public class MainActivity extends ListActivity {
private static final String TAG = MainActivity.class.getName();
private ApplicationsAdapter applicationsAdapter;
private void getAppList(){
//get apps asynch
createList(list);
}
private void createList(ArrayList<ApplicationItem> list){
applicationsAdapter = new ApplicationsAdapter(this, R.layout.application_list_item, list);
setListAdapter(applicationsAdapter);
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
getListView().setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
private int nr = 0;
#Override
public boolean onCreateActionMode(android.view.ActionMode mode, Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.cabselection_menu, menu);
return true;
}
#Override
public boolean onPrepareActionMode(android.view.ActionMode mode, Menu menu) {
return false;
}
#Override
public boolean onActionItemClicked(android.view.ActionMode mode, MenuItem item) {
return false;
}
#Override
public void onDestroyActionMode(android.view.ActionMode mode) {
nr = 0;
applicationsAdapter.clearSelection();
}
#Override
public void onItemCheckedStateChanged(android.view.ActionMode mode, int position, long id, boolean checked) {
if (checked) {
nr++;
applicationsAdapter.setNewSelection(position, checked);
L.d(TAG, applicationsAdapter.getItem(position).getAppName());
} else {
nr--;
applicationsAdapter.removeSelection(position);
}
mode.setTitle(nr + " rows selected!");
}
});
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getAppList();
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
ApplicationItem item = (ApplicationItem)l.getAdapter().getItem(position);
L.d(TAG + "onListItemClick", applicationsAdapter.getItem(position).getAppName());
l.setItemChecked(position, !applicationsAdapter.isPositionChecked(position));
}
}
In my case, normally this whole thing is inside a fragment, inside the viewpager. For the sake of clarity I changed this into typical activity.
Now, the adapter:
public class ApplicationsAdapter extends ArrayAdapter<ApplicationItem> {
// private HashMap<ApplicationItem, Boolean> objects;
private HashMap<Integer, Boolean> mSelection = new HashMap<Integer, Boolean>();
public ApplicationsAdapter(Context context, int textViewResourceId, ArrayList<ApplicationItem> objects) {
super(context, textViewResourceId, objects);
//this.objects = objects;
}
public void setNewSelection(int position, boolean value) {
mSelection.put(position, value);
notifyDataSetChanged();
}
public boolean isPositionChecked(int position) {
Boolean result = mSelection.get(position);
return result == null ? false : result;
}
public Set<Integer> getCurrentCheckedPosition() {
return mSelection.keySet();
}
public void removeSelection(int position) {
mSelection.remove(position);
notifyDataSetChanged();
}
public void clearSelection() {
mSelection = new HashMap<Integer, Boolean>();
notifyDataSetChanged();
}
public ApplicationItem getItem(int position){
return super.getItem(position);
}
public View getView(int position, View convertView, ViewGroup parent){
View v = convertView;
if (v == null) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
v = inflater.inflate(R.layout.application_list_item, null);
}
ApplicationItem item = super.getItem(position);
if(item != null){
TextView appName = (TextView) v.findViewById(R.id.appName);
TextView appPackage = (TextView) v.findViewById(R.id.appPackage);
ImageView appIcon = (ImageView) v.findViewById(R.id.appIcon);
if (appName != null){
appName.setText(item.getAppName());
}
if (appPackage != null){
appPackage.setText(item.getPackageName());
}
if (appIcon != null){
appIcon.setImageDrawable(item.getIcon());
}
}
v.setBackgroundColor(Color.parseColor("#00FFFFFF")); //default color
if (mSelection.get(position) != null) {
v.setBackgroundColor(Color.BLUE);// this is a selected position so make it red
}
return v;
}
}
THE PROBLEM:
ActionMode is nice, however I'm not sure how to keep selected elements after it's destroy.
Normally inside onDestroyActionMode I'm clearing the selection. Great, so I'll just delete that. Now after clicking the "tick" symbol all apps are still selected. However, getting back to them is now problematic, because ActionMode will only "fire up" when clicking on unselected element.
So - how should I handle that?
Ha, the answer was quite simple. I should have thought about it yesterday, but apparently I was a bit too exhausted.
First of all, I changed the mode of listview into
getListView().setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
And deleted setMultiChoiceModeListener() and I'm only using
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
ApplicationItem item = (ApplicationItem)l.getAdapter().getItem(position);
L.d(TAG + "onListItemClick", applicationsAdapter.getItem(position).getAppName());
boolean checked = item.isSelected();
if (!checked) {
item.setSelected(true);
applicationsAdapter.setNewSelection(position, checked);
L.d(TAG, applicationsAdapter.getItem(position).getAppName());
} else {
item.setSelected(false);
applicationsAdapter.removeSelection(position);
}
}
That simple.
Apparently, ActionMode may be fun, but it wasn't the right tool for this job.
And also - adapter from first post can be used as a example of multiselect listView that changes backgrounds instead of checkboxes. Apparently I couldn't find anything simple enough like that.
I'm setting a Contextual Action Bar for my List in a Fragment.
Using ActionBarSherlock to get CAB with Multiple selection in pre-HONEYCOMB version of android.
I'm flowing this tutorial, but application crashes after performing a long click.
This is my code:
public class CreateFragment extends SherlockFragment {
private ArrayList<Game> myGames;
public ArrayAdapter<String> adapter;
private TipspromenadApplication app;
private ListView listView;
private ActionMode mActionMode;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = inflater.inflate(R.layout.fragment_create, container, false);
listView = (ListView) view.findViewById(R.id.createdGames);
View header = getActivity().getLayoutInflater().inflate(R.layout.list_header_create_fragment, null);
listView.addHeaderView(header);
final ArrayList<String> list = new ArrayList<String>();
for (int i = 0; i < myGames.size(); i++) {
list.add(myGames.get(i).getLocation() + " " + new SimpleDateFormat("dd/MM/yy", Locale.getDefault()).format(myGames.get(i).getEventDate()));
}
// adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_multiple_choice, list);
// listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {
Intent intent= new Intent(getActivity(), CreateTabActivity.class);
intent.putExtra("GameID", position-1);
startActivity(intent);
}
});
listView.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position, long id) {
onListItemCheck(position);
return true;
}
});
listView.setAdapter(new SelectableAdapter(this, list));
return view;
}
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
app = (TipspromenadApplication) getActivity().getApplication();
this.myGames = app.loadGames();
}
//#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
if(mActionMode == null) {
// no items selected, so perform item click actions
} else
// add or remove selection for current list item
onListItemCheck(position);
}
private void onListItemCheck(int position) {
SelectableAdapter adapter = (SelectableAdapter) listView.getAdapter();
adapter.toggleSelection(position);
boolean hasCheckedItems = adapter.getSelectedCount() > 0;
if (hasCheckedItems && mActionMode == null)
// there are some selected items, start the actionMode
mActionMode = getSherlockActivity().startActionMode(new ActionModeCallback());
else if (!hasCheckedItems && mActionMode != null)
// there no selected items, finish the actionMode
mActionMode.finish();
if(mActionMode != null)
mActionMode.setTitle(String.valueOf(adapter.getSelectedCount()) + " selected");
}
private class SelectableAdapter extends ArrayAdapter<String>{
private SparseBooleanArray mSelectedItemsIds;
public SelectableAdapter(CreateFragment createFragment, ArrayList<String> list) {
super(getActivity(), android.R.layout.simple_list_item_1, list);
mSelectedItemsIds = new SparseBooleanArray();
}
public void toggleSelection(int position)
{
selectView(position, !mSelectedItemsIds.get(position));
}
public void removeSelection() {
mSelectedItemsIds = new SparseBooleanArray();
notifyDataSetChanged();
}
public void selectView(int position, boolean value)
{
if(value)
mSelectedItemsIds.put(position, value);
else
mSelectedItemsIds.delete(position);
notifyDataSetChanged();
}
public int getSelectedCount() {
return mSelectedItemsIds.size();// mSelectedCount;
}
public SparseBooleanArray getSelectedIds() {
return mSelectedItemsIds;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
if(convertView == null){
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(android.R.layout.simple_list_item_1, null);
}
((TextView) convertView).setText(getItem(position));
//change background color if list item is selected
convertView.setBackgroundColor(mSelectedItemsIds.get(position)? 0x9934B5E4: Color.TRANSPARENT);
return convertView;
}
}
private class ActionModeCallback implements ActionMode.Callback {
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// inflate contextual menu
mode.getMenuInflater().inflate(R.menu.create, menu);
return true;
}
#Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
return false;
}
#Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
// Respond to clicks on the actions in the CAB
switch (item.getItemId()) {
case R.id.share:
// do s.th.
mode.finish(); // Action picked, so close the CAB
return true;
case R.id.delete:
// do s.th.
mode.finish(); // Action picked, so close the CAB
return true;
default:
return false;
}
}
#Override
public void onDestroyActionMode(ActionMode mode) {
// remove selection
SelectableAdapter adapter = (SelectableAdapter) listView.getAdapter();
adapter.removeSelection();
mActionMode = null;
}
}
}
And this is the error in LogCat:
FATAL EXCEPTION: main
java.lang.ClassCastException: android.widget.HeaderViewListAdapter cannot be cast to com.damson.android.tipspromenad.tabs.CreateFragment$SelectableAdapter
at com.damson.android.tipspromenad.tabs.CreateFragment.onListItemCheck(CreateFragment.java:113)
at com.damson.android.tipspromenad.tabs.CreateFragment.access$2(CreateFragment.java:112)
at com.damson.android.tipspromenad.tabs.CreateFragment$2.onItemLongClick(CreateFragment.java:66)
at android.widget.AbsListView.performLongPress(AbsListView.java:2925)
at android.widget.AbsListView$CheckForLongPress.run(AbsListView.java:2875)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:213)
at android.app.ActivityThread.main(ActivityThread.java:4787)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
at dalvik.system.NativeStart.main(Native Method)
Sorry for a long question! I hope you can help me :) Thanks!
That tutorial does not use addHeaderView(). Your code uses addHeaderView(). Your error is involving the header view:
java.lang.ClassCastException: android.widget.HeaderViewListAdapter cannot be cast to com.damson.android.tipspromenad.tabs.CreateFragment$SelectableAdapter
This is because when you call addHeaderView(), getListAdapter() will no longer return your own adapter, but rather a new adapter, one that wraps yours and supplies the header view.
Call getWrappedAdapter() on the HeaderViewListAdapter to get your SelectableAdapter.
UPDATE
HeaderViewListAdapter wasThisReallySoHard=(HeaderViewListAdapter)listView.getAdapter();
SelectableAdapter adapter=(SelectableAdapter)wasThisReallySoHard.getWrappedAdapter();
I have a list activity, and I chose to manually add the first item which is "add new item...".
I have registered the context menu for the whole listview, using registerForContextMenu(getListView()); straight into the onCreate.
When the context menu is build, the system calls onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo). The View v is the listView, and I cannot find a way to know which item in the listview is being long-pressed.
I could create a xml layout, with a layout for the "add new item..." and add a listview after, which would be populated by the activity, and that would react to the context menu, but I'm sure there is a way to solve this problem without any xml layout.
I have tried to register each view inside my listview using registerForContextMenu, which works, however the listview doesn't respond to touch anymore.
Here is my activity code listing:
public class AMain extends ListActivity {
private List<String> pregList;
private List<Long> pregIds;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pregList = new ArrayList<String>();
pregIds = new ArrayList<Long>();
registerForContextMenu(getListView());
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
// TODO: hide the menu for the 1st item!!
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
Logger.d("id = "+info.id);
switch (item.getItemId()) {
case R.id.menu_show:
showPregnancy((int) info.id);
return true;
case R.id.menu_edit:
editPregnancy((int) info.id);
return true;
case R.id.menu_delete:
//TODO: do the deletion
return true;
default:
return super.onContextItemSelected(item);
}
}
protected void onStart() {
super.onStart();
clearPregList();
loadPregList();
getListView().setAdapter(new PregnancyListAdapter(this));
}
void clearPregList() {
pregList.clear();
pregIds.clear();
}
void loadPregList() {
PregnanciesDbAdapter db = new PregnanciesDbAdapter(this);
db.open();
Cursor c = db.getPregnancies();
if (c != null) {
do {
pregList.add(c.getString(c.getColumnIndex(PregnanciesDbAdapter.KEY_PREG_NOM)));
pregIds.add(c.getLong(c.getColumnIndex(PregnanciesDbAdapter.KEY_PREG_ROWID)));
} while (c.moveToNext());
c.close();
}
db.close();
}
private class PregnancyListAdapter extends BaseAdapter {
private Context context;
public PregnancyListAdapter(Context ctx) {
context = ctx;
}
#Override
public int getCount() {
return pregList.size()+1;
}
#Override
public Object getItem(int position) {
if (position == 0) { // add button
return getString(R.string.addPreg);
} else {
return pregList.get(position-1);
}
}
#Override
public long getItemId(int position) {
if (position == 0) {
return -1;
}
return pregIds.get(position-1);
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
LinearLayout itemLayout;
itemLayout= (LinearLayout) LayoutInflater.from(context).inflate(R.layout.homelist_item_pregnancy, parent, false);
ImageView logo = (ImageView) itemLayout.findViewById(R.id.logo);
TextView pregName = (TextView) itemLayout.findViewById(R.id.pregName);
if (position == 0) {
itemLayout.setFocusable(false);
itemLayout.setFocusableInTouchMode(false);
pregName.setText(getString(R.string.addPreg));
} else {
logo.setVisibility(View.INVISIBLE);
pregName.setText(pregList.get(position-1));
}
itemLayout.setId(position);
return itemLayout;
}
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
if (position == 0) {
startActivity(prepareIntent(AShowPregnancy.class, 0));
} else {
showPregnancy(position-1);
}
}
void showPregnancy(int pregId) {
startActivity(prepareIntent(AShowPregnancy.class, pregId));
}
void editPregnancy(int pregId) {
startActivity(prepareIntent(ANewPregnancy.class, pregId));
}
Intent prepareIntent(Class<?> className, int pregId) {
Intent i = new Intent(this, className);
if (pregId > 0) {
PregnanciesDbAdapter db = new PregnanciesDbAdapter(this);
db.open();
Pregnancy p = db.load(pregIds.get(pregId));
db.close();
i.putExtra(C.EXTRA_PREGNANCY, p);
}
return i;
}
}
Thanks for reading. Hope you can help.
Oh, god, again. I found out myself how to do it, and it was easier than easy.
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
// info.position is the position in the ListView
I hate myself :)