I'm doing a proyect where i have a view with multiple listview created at runtime, every listview load specifics rows of a database. and i want to implement a contextmenu. The problem is how can i get the row of the listview to retieve the id of the database? How can i get my list adapter inside the contextmenu ? or some other solution. Thanks!
here is a part of the code...
private void makeView(){
yearsArray = db.getUniqueYears(TABLE_NAME);
for (int i = 0; i < yearsArray.size() ; i++){
list = db.getDocByYear(TABLE_NAME, yearsArray.get(i));
custom_adapter = new Document_adapter(this, list);
ListView lv = new ListView(this);
lv.setAdapter(custom_adapter);
lv.setBackgroundResource(R.drawable.title_container_bg);
registerForContextMenu(lv);
}
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater mi = getMenuInflater();
mi.inflate(R.menu.doc_options, menu);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
/*
*/
return super.onContextItemSelected(item);
}
If you set your database up properly you can just do this info.id; in your onContextItemSelected and that gives the database id
Related
As you can see in the code below, when I LongClick on an item in ListView, i get a popup menu with option to manipulate the item (delete, update, etc).
the problem is that I use my function on item.toString instead the item itself.
How can i get the item itself, and put it as an argument in my functions?
onCreateContextMenu:
public void onCreateContextMenu(final ContextMenu menu, final View v, final ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
if (v.getId() == R.id.db_list_view) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.menu_list, menu);
}
}
onContextItemSelected:
public boolean onContextItemSelected(android.view.MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
Object obj = lv.getItemAtPosition(info.position);
String nameToString = obj.toString();
if (item.getTitle().equals("Delete")) {
deletePlayerFromLongClick(nameToString);
} else if (item.getTitle().equals("Update")) {
updatePlayerFromLongClick(nameToString);
} else if (item.getTitle().equals("Change Host/Guest")) {
changeMembership(nameToString);
}
return true;
}
do like:
yourAdapter.getItem(info.position);
or
((YourAdapter)lv.getAdapter()).getItem(position);
or even simpler,
listOfItem.get(info.position);
What i want is when the user clic on contact a context Menu appear with item "delete" so i did this, but the problem is I want that when he clic on delete a row from Sqlit ( that corresponds to the contact I just clicked)
Activity.class
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item.getMenuInfo();
int i = info.position;
switch (item.getItemId()) {
case R.id.delete:
dbHandler.deleteEtudiant(i);
Toast.makeText(this,"deleted "+i, Toast.LENGTH_SHORT).show();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
MyDBHandler.class
public void deleteEtudiant(int i)
{
SQLiteDatabase db = this.getWritableDatabase();
db.delete("etudiant", "Id+ =" + i, null);
}
The problem with your code is that your are getting the id of "AdapterContextMenuInfo" object and sending it to the database "delete()" method. But actually you need to send the id of the of the item of database, the value that is stored in "ID" column of that particular row in SQlite Database.
Please have a look on the tutorial given below, specially check the "getContact()" and "deleteContact()" method of the tutorial.
http://www.androidhive.info/2011/11/android-sqlite-database-tutorial/
I am developing an android application.I will have a listview and i have set a context menu to appear when a listview item is long-pressed.How do i get the item from the listview item selected(say text from a listview textview) after an action from the contextmenu is chosen so i can process it?
Here is some code:
protected void onCreate(Bundle savedInstanceState) {
-------
lv1 = (ListView) findViewById(R.id.listings);
registerForContextMenu(lv1);
lv1.setOnItemClickListener(this);
}
And the onCreateContextMenu:
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item
.getMenuInfo();
switch (item.getItemId()) {
case R.id.watch:
String name = "";
return true;
case R.id.buy:
return true;
default:
return super.onContextItemSelected(item);
}
}
I want to get text from a textview in a list item.How do i achieve that?
To get the item from the ListView item selected refer to ContextMenuInfo object (see last implemented method below). Full solution as follows:
1) register ListView for context menu in ListActivity class
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ...
getListView().setAdapter(mAdapter);
registerForContextMenu(getListView());
}
1a) if you have complex View on your list you might need to enable long click on each list view in Adapter class
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
RelativeLayout layout = (RelativeLayout) LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
itemLayout = layout;
itemLayout.setLongClickable(true);
}
// ...
return view;
}
2) implement onCreateContextMenu() and onContextItemSelected() in ListActivity class
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
String title = ((MyItem) mAdapter.getItem(info.position)).getTitle();
menu.setHeaderTitle(title);
menu.add(Menu.NONE, MENU_CONTEXT_DELETE_ID, Menu.NONE, DELETE_TEXT);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_CONTEXT_DELETE_ID:
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
Log.d(TAG, "removing item pos=" + info.position);
mAdapter.remove(info.position);
return true;
default:
return super.onContextItemSelected(item);
}
}
The problem was the onItemLongClick() method, do not use it for context menu.
Instead, register the LISTVIEW for the context menu.
Here's the source.
for onCreate():
registerForContextMenu(lv);
And to access the selected item during long click:
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
if (v.getId() == R.id.lv) {
ListView lv = (ListView) v;
AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
YourObject obj = (YourObject) lv.getItemAtPosition(acmi.position);
menu.add("One");
menu.add("Two");
menu.add("Three");
menu.add(obj.name);
}
}
1) First we use
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.add("View Selected Text");
}
2)
list--is ref if ListView
registerForContextMenu(list);
3)
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
if(item.getTitle().equals("View Selected Text"))
{
AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) item.getMenuInfo();
Contact c=array.get(menuInfo.position);
Toast.makeText(List.this, "Selected String is :-"+c.toString(), Toast.LENGTH_SHORT).show();
}
}
first get list using id
Context context = getApplicationContext();
ComponentName component = new ComponentName(context.getPackageName(), TestReplaceHomeAppActivity.class.getName());
String packname = context.getPackageName();
Intent LaunchIntent = getActivity().getPackageManager().getLaunchIntentForPackage(packageName);
if(LaunchIntent != null){
startActivity(LaunchIntent);
}
else {
Toast.makeText(getActivity().getBaseContext(),"APPLICATION IN NOT AVAILABEL", Toast.LENGTH_SHORT).show();
}
Write this in your longPressListener with the listview you use:
ListView list = (ListView) findViewById(android.R.id.list);
registerForContextMenu(list);
And this are the methods:
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
Adapter adapter = getListAdapter();
Object item = adapter.getItem(info.position);
menu.setHeaderTitle("Choose");
menu.add(0, v.getId(), 0, "Delete");
}
#Override
public boolean onContextItemSelected(MenuItem item) {
if (item.getTitle() == "Delete") {
deleteContact(item.getItemId());
} else if (...) {
// code
} else {
return false;
}
return true;
}
public void deleteContact(int id){
// your code what to do for the clicked item
}
use these methods, onCreateContextMenu and onContextItemSelected\
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
if (v.getId() == R.id.listview) {
menu.setHeaderTitle("Delete");
menu.add(Menu.NONE, 0, 0, "Delete from list");
}
}
/**
* Responding to context menu selected option
* */
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item
.getMenuInfo();
int menuItemIndex = item.getItemId();
// check for selected option
if (menuItemIndex == 0) {
// user selected delete
// delete the listrow
..(in your onitemclicklistener there is a parameter called as'postition' use this position and use some method to delete the data corresponding to the position value )
// reloading same activity again
Intent intent = getIntent();
finish();
startActivity(intent);
}
return true;
}
The above answers are very accurate and to the point for the case provided. That being said, I was brought here with using a convertView for my listview and am answering for those who are also brought here with this case.
If your LISTVIEW is using convertView and inflating a separate layout (say list_MyItem.xml), directly modify the list_MyItem.xml to have:
android:longClickable="true"
For example, if the listview is being populated with buttons modify the button as such:
<Button
android:id="#+id/myButton"
.
.
.
android:longClickable="true"
/>
I am developing an android application.I will have a listview and i have set a context menu to appear when a listview item is long-pressed.How do i get the item from the listview item selected(say text from a listview textview) after an action from the contextmenu is chosen so i can process it?
Here is some code:
protected void onCreate(Bundle savedInstanceState) {
-------
lv1 = (ListView) findViewById(R.id.listings);
registerForContextMenu(lv1);
lv1.setOnItemClickListener(this);
}
And the onCreateContextMenu:
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.context_menu, menu);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item
.getMenuInfo();
switch (item.getItemId()) {
case R.id.watch:
String name = "";
return true;
case R.id.buy:
return true;
default:
return super.onContextItemSelected(item);
}
}
I want to get text from a textview in a list item.How do i achieve that?
To get the item from the ListView item selected refer to ContextMenuInfo object (see last implemented method below). Full solution as follows:
1) register ListView for context menu in ListActivity class
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ...
getListView().setAdapter(mAdapter);
registerForContextMenu(getListView());
}
1a) if you have complex View on your list you might need to enable long click on each list view in Adapter class
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
RelativeLayout layout = (RelativeLayout) LayoutInflater.from(mContext).inflate(R.layout.list_item, parent, false);
itemLayout = layout;
itemLayout.setLongClickable(true);
}
// ...
return view;
}
2) implement onCreateContextMenu() and onContextItemSelected() in ListActivity class
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
String title = ((MyItem) mAdapter.getItem(info.position)).getTitle();
menu.setHeaderTitle(title);
menu.add(Menu.NONE, MENU_CONTEXT_DELETE_ID, Menu.NONE, DELETE_TEXT);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
switch (item.getItemId()) {
case MENU_CONTEXT_DELETE_ID:
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
Log.d(TAG, "removing item pos=" + info.position);
mAdapter.remove(info.position);
return true;
default:
return super.onContextItemSelected(item);
}
}
The problem was the onItemLongClick() method, do not use it for context menu.
Instead, register the LISTVIEW for the context menu.
Here's the source.
for onCreate():
registerForContextMenu(lv);
And to access the selected item during long click:
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenu.ContextMenuInfo menuInfo) {
if (v.getId() == R.id.lv) {
ListView lv = (ListView) v;
AdapterView.AdapterContextMenuInfo acmi = (AdapterContextMenuInfo) menuInfo;
YourObject obj = (YourObject) lv.getItemAtPosition(acmi.position);
menu.add("One");
menu.add("Two");
menu.add("Three");
menu.add(obj.name);
}
}
1) First we use
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
menu.add("View Selected Text");
}
2)
list--is ref if ListView
registerForContextMenu(list);
3)
#Override
public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
if(item.getTitle().equals("View Selected Text"))
{
AdapterContextMenuInfo menuInfo = (AdapterContextMenuInfo) item.getMenuInfo();
Contact c=array.get(menuInfo.position);
Toast.makeText(List.this, "Selected String is :-"+c.toString(), Toast.LENGTH_SHORT).show();
}
}
first get list using id
Context context = getApplicationContext();
ComponentName component = new ComponentName(context.getPackageName(), TestReplaceHomeAppActivity.class.getName());
String packname = context.getPackageName();
Intent LaunchIntent = getActivity().getPackageManager().getLaunchIntentForPackage(packageName);
if(LaunchIntent != null){
startActivity(LaunchIntent);
}
else {
Toast.makeText(getActivity().getBaseContext(),"APPLICATION IN NOT AVAILABEL", Toast.LENGTH_SHORT).show();
}
Write this in your longPressListener with the listview you use:
ListView list = (ListView) findViewById(android.R.id.list);
registerForContextMenu(list);
And this are the methods:
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
Adapter adapter = getListAdapter();
Object item = adapter.getItem(info.position);
menu.setHeaderTitle("Choose");
menu.add(0, v.getId(), 0, "Delete");
}
#Override
public boolean onContextItemSelected(MenuItem item) {
if (item.getTitle() == "Delete") {
deleteContact(item.getItemId());
} else if (...) {
// code
} else {
return false;
}
return true;
}
public void deleteContact(int id){
// your code what to do for the clicked item
}
use these methods, onCreateContextMenu and onContextItemSelected\
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
if (v.getId() == R.id.listview) {
menu.setHeaderTitle("Delete");
menu.add(Menu.NONE, 0, 0, "Delete from list");
}
}
/**
* Responding to context menu selected option
* */
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterView.AdapterContextMenuInfo info = (AdapterView.AdapterContextMenuInfo) item
.getMenuInfo();
int menuItemIndex = item.getItemId();
// check for selected option
if (menuItemIndex == 0) {
// user selected delete
// delete the listrow
..(in your onitemclicklistener there is a parameter called as'postition' use this position and use some method to delete the data corresponding to the position value )
// reloading same activity again
Intent intent = getIntent();
finish();
startActivity(intent);
}
return true;
}
The above answers are very accurate and to the point for the case provided. That being said, I was brought here with using a convertView for my listview and am answering for those who are also brought here with this case.
If your LISTVIEW is using convertView and inflating a separate layout (say list_MyItem.xml), directly modify the list_MyItem.xml to have:
android:longClickable="true"
For example, if the listview is being populated with buttons modify the button as such:
<Button
android:id="#+id/myButton"
.
.
.
android:longClickable="true"
/>
How does one register a ListView for a context menu when using a custom ListView based on BaseAdapter?
I tried registerForContextMenu(getListView());, but this doesn't seem to work. I'm using ListView14.java from API Demos.
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setListAdapter(new EfficientAdapter(this));
registerForContextMenu(getListView());
}
#Override
public void onCreateContextMenu(ContextMenu menu, View v,
ContextMenuInfo menuInfo) {
super.onCreateContextMenu(menu, v, menuInfo);
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.tag_context_menu, menu);
}
#Override
public boolean onContextItemSelected(MenuItem item) {
AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
switch (item.getItemId()) {
case R.id.tagView:
// editNote(info.id);
return true;
case R.id.tagRename:
// deleteNote(info.id);
return true;
case R.id.tagDelete:
// deleteNote(info.id);
return true;
default:
return super.onContextItemSelected(item);
}
}
Instead of using registerForContextMenu(getListView()), try naming your listview in onCreate and using that reference:
Listview myListView = (Listview) findViewById(R.id.myListView); //or use any other constructor
registerForContextMenu(myListView);
This works for all the items in my adapter-fed Gridview (although it's turning out to be impossible to then properly adding a contextmenu to the gridview itself which registers longclicks on the empty gridview items, but that's another story altogether :) ), and I'd imagine a Listview to work the same.