In my adapter class I have created a alert dialog and added a update button to it which allows me to update the items on my list view, it updates my listview but only when I leave the page and return back to it, I have used notifydatasetchanged but it doesn't seem to work, I want it to update on the list view immediately after the dialog closing.
update button
viewHolder.btnDisplayUpdate.setText("Update");
viewHolder.btnDisplayUpdate.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
updateCrime(crimes);
}
});
Update method
private void updateCrime(CrimesDelete crimes){
AlertDialog.Builder popupWindow = new AlertDialog.Builder(context);
LayoutInflater inflater = LayoutInflater.from(context);
View root = inflater.inflate(R.layout.dialog_update, null);
popupWindow.setView(root);
AlertDialog alertDialog = popupWindow.create();
alertDialog.show();
editLocation = (EditText)root.findViewById(R.id.editText_location);
editType = (EditText)root.findViewById(R.id.editText_type);
editDescription = (EditText)root.findViewById(R.id.editText_description);
editDate = (EditText)root.findViewById(R.id.textViewDate);
editTime = (EditText)root.findViewById(R.id.textViewTime);
Spinner spinner = (Spinner) root.findViewById(R.id.editText_rating);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getContext(), R.array.rating, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
{
public void onItemSelected(AdapterView<?> parent,
View view, int pos, long id) {
editRating = parent.getItemAtPosition(pos).toString();
if (pos==0){
editRating = null;
}
}
public void onNothingSelected(AdapterView<?> parent) {
}
});
editLocation.setText(crimes.getLOCATION());
editType.setText(crimes.getTYPE());
editDescription.setText(crimes.getDESCRIPTION());
editDate.setText(crimes.getDATE());
editTime.setText(crimes.getTIME());
root.findViewById(R.id.btnAdd).setOnClickListener(new View.OnClickListener(){
#Override
public void onClick(View view){
String location = editLocation.getText().toString().trim();
String type = editType.getText().toString().trim();
String description = editDescription.getText().toString().trim();
String date = editDate.getText().toString().trim();
String time = editTime.getText().toString().trim();
String rating = spinner.getSelectedItem().toString().trim();
DB_CRIME.updateDate(crimes.getID(), location, type, description, date, time, rating);
loadUpdatedCrimes();
alertDialog.dismiss();
}
});
}
private void loadUpdatedCrimes() {
notifyDataSetChanged();
Toast.makeText(getContext(), "Crime has been Updated" , Toast.LENGTH_SHORT).show();
}
Related
mainActivity has button. After button is clicked a popup message show having a button and a TextInputLayout.
data is sent to a tabbed acticity having 2 fragments and
the data is shown in textview of first fragment. Error is the data wont show in the textview while running
adapter for 2 fragments--
public class adapter extends FragmentPagerAdapter {
public adapter(#NonNull FragmentManager fm) {
super(fm);
}
#NonNull
#Override
public Fragment getItem(int position) {
Fragment fragment;
if (position == 1) {
fragment = new SecondFragment();
} else {
fragment = new FirstFragment();
}
return fragment;
}
#Override
public int getCount() {
return 2;
}
#Nullable
#Override
public CharSequence getPageTitle(int position) {
String title = null;
if (position == 0) {
title = "TextView";
} else if (position == 1) {
title = "Listview";
}
return title;
}
}
mainActivity(having popup window on clicking button)
myDialog = new Dialog(this);
}
//for for joining match
public void ShowPopup(View view) {
myDialog.setContentView(R.layout.popup);
myDialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
myDialog.show();
name = myDialog.findViewById(R.id.ig_name);
String igname = Objects.requireNonNull(name.getEditText()).getText().toString();
entry = myDialog.findViewById(R.id.entry);
entry.setOnClickListener(v -> {
Intent intent = new Intent(getApplicationContext(), secondActivity.class);
intent.putExtra("igname", igname);
startActivity(intent);
finish();
});
}
}
my firstFragment
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_first, container, false);
secondActivity activity = (secondActivity) getActivity();
TextView output = view.findViewById(R.id.textshow);
Bundle results = activity.getMyData();
String value1 = results.getString("value");
output.setText(value1);
return view;
}
secondActivity (intent is transfered from popup window)
public class secondActivity extends AppCompatActivity {
private String name;
TabLayout tabLayout;
ViewPager viewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_second);
viewPager = findViewById(R.id.view_pager);
viewPager.setAdapter(new adapter(getSupportFragmentManager()));
tabLayout = findViewById(R.id.tabs_layout);
tabLayout.setupWithViewPager(viewPager);
Intent intent = getIntent();
name = intent.getExtras().getString("igname");
}
public Bundle getMyData() {
Bundle bundle = new Bundle();
bundle.putString("value", name);
return bundle;
}
}
Get the "igname" String value in onClickListner & also dismiss the dialog before finishing the activity.
entry.setOnClickListener(v -> {
String igname = Objects.requireNonNull(name.getEditText()).getText().toString();
Intent intent = new Intent(getApplicationContext(), secondActivity.class);
intent.putExtra("igname", igname);
startActivity(intent);
finish();
});
I need to delete the item from database and ListView. I can delete the item from ListView but i can't delete it from database. I think the problem is in getting the position of the item from the database i tried to do it in my own but it does not work. I don't know what should I do.Help me to slove this.
myDB = new DbHandler(this);
userList = new ArrayList<>();
data = myDB.getListContents();
numRows = data.getCount();
if (numRows == 0) {
Toast.makeText(AddCount.this, "No Items", Toast.LENGTH_LONG).show();
} else {
while (data.moveToNext()) {
user = new User(data.getString(1), data.getString(2));
userList.add(user);
}
}
adapter = new Two_columnListAdapter(this, R.layout.list_item_layout, userList);
listView.setAdapter(adapter);
adapter.notifyDataSetChanged();
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(final AdapterView<?> arg0, View arg1, final int arg2, final long arg3) {
final AlertDialog.Builder delete = new AlertDialog.Builder(AddCount.this);
delete.setIcon(R.drawable.ic_baseline_delete_24);
delete.setTitle("Are you sure");
delete.setMessage("Do you want to delete this item?");
delete.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
DbHandler db = new DbHandler(getApplicationContext());
myDB.deleteData(userList.get(arg2));
userList.remove(arg2);
adapter.notifyDataSetChanged();
Toast.makeText(getApplicationContext(), "Deleted" ,Toast.LENGTH_SHORT).show();
}
});`
`Two_columnAdapter.java
public class Two_columnListAdapter extends ArrayAdapter<User> {
private LayoutInflater layoutInflater;
private ArrayList<User>users;
private int mviewResourceId;
public Two_columnListAdapter(Context context,int textViewResourceId,ArrayList<User>users){
super(context,textViewResourceId,users);
this.users = users;
layoutInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mviewResourceId = textViewResourceId;
}
public View getView(int position, View convertView, ViewGroup parents){
convertView = layoutInflater.inflate(mviewResourceId,null);
User user= users.get(position);
if (user != null){
TextView text = (TextView)convertView.findViewById(R.id.title);
TextView num = (TextView)convertView.findViewById(R.id.value);
if (text != null){
text.setText(user.getText());
}
if (num != null){
num.setText(user.getNum());
}
}
return convertView;
}
DatabaseHelpher(delete the single row from database)
public void deleteData(String id) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_Inputs, KEY_ID + " =?", new String[]{id});
db.close();
}
You can save the return data inside a model class instead of a list. Then call the setOnLongClickListener in your adapter class, inside onBindViewHolder.
class listHolder extends RecyclerView.ViewHolder{
private View view;
public listHolder(#NonNull View itemView) {
super(itemView);
view = itemView;
}
}
#Override
public void onBindViewHolder(#NonNull listHolder listHolder, int position, #NonNull userModel userModel) {
viewHolder.view.setOnLongClickListener(new View.OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
// Do somethings....
}
});
For more info you can check out this link, Hope this helps!
Here I'm using Custom Adapter by implementing listAdapter to Support buttons in the list items. When i click the Delete button it deletes currect row. But i can't able to refresh this listView.
File Structure is MainActivity -> FragmentClass-> this Custom class for the listAdpater.
public class Category_ListView_Custom_Adapter extends BaseAdapter implements ListAdapter{
private Realm realm;
private ArrayList<String> list = new ArrayList<>();
private Context context;
public Category_ListView_Custom_Adapter(ArrayList<String> list, Context context){
this.list = list;
this.context = context;
}
#Override
public int getCount() {
return list.size();
}
#Override
public Object getItem(int i) {
return list.get(i);
}
#Override
public long getItemId(int i) {
return i;
}
#Override
public View getView(final int i, View view, ViewGroup viewGroup) {
View view1 = view;
realm = Realm.getDefaultInstance();
if(view == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.category_listview_row, null);
}
TextView listItemText = (TextView) view.findViewById(R.id.item);
listItemText.setText(list.get(i));
ImageView edit = (ImageView) view.findViewById(R.id.image);
ImageView delete = (ImageView) view.findViewById(R.id.delete);
edit.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// list.remove(i);
/// Toast.makeText(view.getContext(), "hey "+list.get(i).toString(), Toast.LENGTH_SHORT).show();
// notifyDataSetChanged();
Intent intent = new Intent(context, AddCategory.class);
intent.putExtra("category","expense");
intent.putExtra("subcategory", list.get(i));
context.startActivity(intent);
}
});
delete.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
RealmResults<Category> categorylist = realm.where(Category.class).equalTo("Id",i+1).and().equalTo("Subcategory",list.get(i)).findAll();
for (Category category : categorylist) {
realm.beginTransaction();
categorylist.deleteFirstFromRealm();
realm.commitTransaction();
try {
context.notifyAll();
}catch (Exception e){
Toast.makeText(context, e.toString(), Toast.LENGTH_SHORT).show();
}
// Expense.call_resume
}
}
});
return view;
}
}
Please Help me. Thank you.
You are .removing from a wrong view. Try to make root List<> static and do Class.list.get(i).remove or something like that.
Also, try to hide a view inside your get view.
Now i'm making an application that it should display a list of courses in an expandable list view and when the user clicks on a child element it opens a new activity with the course details , everything works pretty fine but , when i tested the application through nexus the order of the courses was the same i put inside the hashmap and in the switch case statement but when i tested it through my galaxy not two here it came the disaster the orders in the list were scrambled so the click event got messed up when supposed to open course details for x it opens for y and so on ,,, what should i do ?
THIS IS THE MAIN
public class Courses extends ActionBarActivity {
HashMap<String,List<String>> Courses_castegory;
List<String> Courses_list;
ExpandableListView expandableListView;
MyCourseAdapter myCourseAdapter;
Intent detaledActivity;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_courses);
expandableListView = (ExpandableListView) findViewById(R.id.simple_expandable_list);
Courses_castegory = CourseProvider.getInfo();
Courses_list=new ArrayList<>(Courses_castegory.keySet());//get all the keys from the hashmap
myCourseAdapter = new MyCourseAdapter(this,Courses_castegory,Courses_list);
expandableListView.setAdapter(myCourseAdapter);
expandableListView.setOnGroupCollapseListener(new ExpandableListView.OnGroupCollapseListener() {
#Override
public void onGroupCollapse(int groupPosition) {
Toast.makeText(getBaseContext(), Courses_list.get(groupPosition) + " is collapsed", Toast.LENGTH_SHORT).show();
}
});
expandableListView.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
#Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
//Toast.makeText(getBaseContext(),
//Courses_castegory.get(Courses_list.get(groupPosition)).get(childPosition)+" from "+Courses_list.get(groupPosition)+" is selected",Toast.LENGTH_SHORT).show();
switch(groupPosition) {
case 0:
switch (childPosition) {
case 0:
detaledActivity = new Intent(Courses.this, DetailedCouse.class);
startActivity(detaledActivity);
break;
}
}
return true;
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_courses, menu);
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
THIS IS THE COURSE PROVIDER
public class CourseProvider {
public static HashMap<String,List<String>> getInfo(){
HashMap<String,List<String>>CourseDetails = new HashMap<String,List<String>>();
List<String> CourseType1 = new ArrayList<>();
CourseType1.add("English For Work");
List<String> CourseType2= new ArrayList<>();
CourseType2.add("General English For Work");
CourseType2.add("Intensive English For Work");
List<String> CourseType3 = new ArrayList<>();
CourseType3.add("English Academic Year");
CourseType3.add("English Academic Semester");
List<String> CourseType4 = new ArrayList<>();
CourseType4.add("IELTS Exam Preparation");
CourseType4.add("TOEFL Exam Preparation");
CourseType4.add("GMAT Exam Preparation");
CourseType4.add("GRE Exam Preparation");
List<String> CourseType5 = new ArrayList<>();
CourseType5.add("Young Learners");
List<String> CourseType6 = new ArrayList<>();
CourseType6.add("General English Language");
CourseType6.add("Intensive English Language");
CourseType6.add("30+");
CourseDetails.put("Learn English in Your Teacher's Home",CourseType1);
CourseDetails.put("English For Work",CourseType2);
CourseDetails.put("Academic Semester / Year",CourseType3);
CourseDetails.put("Exam Preparation Courses",CourseType4);
CourseDetails.put("Young Learners",CourseType5);
CourseDetails.put("Flexible Courses",CourseType6);
return CourseDetails;
}}
AND THIS IS THE COURSE ADAPTER
public class MyCourseAdapter extends BaseExpandableListAdapter {
private Context context;
private HashMap<String,List<String>>Courses_Category;
private List<String> Course_List ;
public MyCourseAdapter(Context context ,HashMap<String,List<String>>Courses_Category,List<String> Course_List) {
this.context=context;
this.Courses_Category=Courses_Category;
this.Course_List=Course_List;
}
#Override
public int getGroupCount() {
return Course_List.size();
}
#Override
public int getChildrenCount(int groupPosition) {
return Courses_Category.get(Course_List.get(groupPosition)).size();
}
#Override
public Object getGroup(int groupPosition) {
return Course_List.get(groupPosition);
}
#Override
public Object getChild(int parent, int child) {
return Courses_Category.get(Course_List.get(parent)).get(child);
}
#Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
#Override
public long getChildId(int parent, int child) {
return child;
}
#Override
public boolean hasStableIds() {
return false;
}
#Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
String group_title = (String) getGroup(groupPosition);
if (convertView==null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.parent_courses,parent,false);
}
TextView parent_textview = (TextView) convertView.findViewById(R.id.parent_text_view);
parent_textview.setTypeface(null, Typeface.BOLD);
parent_textview.setText(group_title);
return convertView;
}
#Override
public View getChildView(final int parentPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
String child_title = (String) getChild(parentPosition,childPosition);
if (convertView==null){
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView=inflater.inflate(R.layout.child_courses,parent,false);
}
TextView child_textview = (TextView) convertView.findViewById(R.id.child_text_view);
child_textview.setText(child_title);
return convertView;
}
#Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
public void onGroupCollapsed(int groupPosition){
super.onGroupCollapsed(groupPosition);
}
public void onGroupExpanded(int groupPosition){
super.onGroupExpanded(groupPosition);
}}
//
Done using LinkedHashMapinstead of HashMap
In my android application, I am trying to show contextual action bar (CAB) in listview for item delete. The problem is that whenever an item is pressed for long, the item gets selected, but CAB doesn't appear. I have verified with so many tutorials, can't figure out what am I missing. Any help would be appreciated.
Adapter Class
public class DuasListAdapter extends ArrayAdapter<String>{
// class variables
private final Context context;// to save context
private final List<String> duas;// to save list of stores
LayoutInflater inflater;//
private SparseBooleanArray selectedItemsIds;
public DuasListAdapter(Context ctx,int resourceId, List<String> duasList) {
super(ctx, resourceId, duasList);
selectedItemsIds = new SparseBooleanArray();
context = ctx;// save context
duas = duasList;// save list of stores
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);// save inflater layout
}
*/
#Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if(convertView==null){
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.adapter_list_duas, null);
convertView.setTag(holder);
holder.duaIndex = position;
holder.background = (LinearLayout) convertView.findViewById(R.id.ll_duas_list);
holder.iv_duatype = (ImageView) convertView.findViewById(R.id.iv_duatype);
holder.tv_dua_arabic = (TextView) convertView.findViewById(R.id.tv_dua_arabic);
holder.tv_dua_no = (TextView) convertView.findViewById(R.id.dua_no);
}
else {
holder = (ViewHolder) convertView.getTag();
}
return convertView;
}
static class ViewHolder {
int duaIndex;
LinearLayout background;// background to display color for read and unread messages
ImageView iv_duatype;
TextView tv_dua_arabic;// title of message
TextView tv_dua_ref;// message by and message created on
TextView tv_dua_no;
/**
* #description constructor to save context and list of stores views
* #param v to refer the view
* #return
*/
}
public void remove(List<String> object){
duas.remove(object);
notifyDataSetChanged();
}
public List<String> getDuas(){
return duas;
}
public void toggleSelection(int position) {
selectView(position, !selectedItemsIds.get(position));
}
public void removeSelection() {
selectedItemsIds = new SparseBooleanArray();
notifyDataSetChanged();
}
public void selectView(int position, boolean value) {
if (value)
selectedItemsIds.put(position, value);
else
selectedItemsIds.delete(position);
notifyDataSetChanged();
}
public int getSelectedCount() {
return selectedItemsIds.size();
}
public SparseBooleanArray getSelectedIds() {
return selectedItemsIds;
}
}
Fragment Class
Context context;
LinearLayout ll_back_duas_list_header;
TextView ll_back_duas_list_header_title;
ListView lvDuaas;
public static DuasListAdapter duasAdapter;
ActionMode mAction;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
context = inflater.getContext();
View view = inflater.inflate(R.layout.fragment_list_duas, container, false);
ll_back_duas_list_header = (LinearLayout) view.findViewById(R.id.ll_back_duas_list_header);
ll_back_duas_list_header_title = (TextView) view.findViewById(R.id.ll_back_duas_list_header_title);
lvDuaas = (ListView) view.findViewById(R.id.lv_duas);
setHasOptionsMenu(true);
return view;
}
#Override
public void onActivityCreated(Bundle savedInstanceState) {
String verses = new SharedPreferencesSupplication().read(SingletonClass.keyListOfVerses, "a1");
String[] versesList = verses.split(",");
final ArrayList<String> duas = new ArrayList<String>();
for (int i = 0; i < versesList.length; i++) {
if (versesList[i].length() > 0)
duas.add(versesList[i]);
}
duasAdapter = new DuasListAdapter(context,R.layout.adapter_list_duas,duas);
lvDuaas.setAdapter(duasAdapter);
lvDuaas.setOnItemLongClickListener(new OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> parent,
View view, int position, long id) {
// TODO Auto-generated method stub
lvDuaas.setChoiceMode(lvDuaas.CHOICE_MODE_MULTIPLE);
lvDuaas.setItemChecked(position, true);
mAction = getActivity().startActionMode(modeCallBack);
view.setSelected(true);
return true;
}
});
super.onActivityCreated(savedInstanceState);
}
ActionMode.Callback modeCallBack = new ActionMode.Callback() {
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
mode.getMenuInflater().inflate(R.menu.activity_main, menu);
return false;
}
#Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean onActionItemClicked(ActionMode mode,
MenuItem item) {
// TODO Auto-generated method stub
switch (item.getItemId()) {
case R.id.delete:
// Calls getSelectedIds method from ListViewAdapter Class
SparseBooleanArray selected = duasAdapter
.getSelectedIds();
// Captures all selected ids with a loop
for (int i = (selected.size() - 1); i >= 0; i--) {
if (selected.valueAt(i)) {
String selecteditem = duasAdapter.getItem(selected.keyAt(i));
// Remove selected items following the ids
duasAdapter.remove(selecteditem);
}
}
// Close CAB
mode.finish();
return true;
default:
return false;
}
}
#Override
public void onDestroyActionMode(ActionMode mode) {
// TODO Auto-generated method stub
duasAdapter.removeSelection();
}
};
}
XML file
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
>
<item
android:id="#+id/delete"
android:title="#string/delete"
/>
</menu>
From looking at your code I can see the onCreateActionMode callback function returns false.
onCreateActionMode should return true if the action mode should be created, false if entering this mode should be aborted.
So when the user long clicks on the ListItem and the event is triggered it reaches onCreateActionMode and returns false. Telling it to abort. Hence no CAB menu appears. Try changing it to true and also adding in some logs to see if it ever makes it into the callback function.
This would be the change below:
#Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
// TODO Auto-generated method stub
Log.d("Test","In onCreateActionMode");
mode.getMenuInflater().inflate(R.menu.activity_main, menu);
return true;//code updated here
}
Android Link to reference : http://developer.android.com/reference/android/view/ActionMode.Callback.html#onCreateActionMode(android.view.ActionMode, android.view.Menu)