Develop Reference

Remove an item from a ListView using an alert dialog

I have this ListView containing items and I want to create an alert dialog that removes any of these items when I long click on an item. onLongClick on an item shows an AlertDialog and if I click yes, it removes the item.
Here is my code.
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) {
new AlertDialog.Builder(MainActivity.this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage("Are You Sure You Want to Delete This Note?!")
.setTitle("Attempt to Delete A Note")
.setPositiveButton("YES", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
try {
notesList.remove(i);
arrayAdapter.notifyDataSetChanged();
Toast.makeText(MainActivity.this, "ooooooh No!!", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
})
.setNegativeButton("NO", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this, "Good Choice", Toast.LENGTH_SHORT).show();
}
})
.show();
return true;
}
});

I think the problem is 'i' position of alert dialog click listner and u need to user list item clicked position in order to delete item from list.
Please use below code :
listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
#Override
public boolean onItemLongClick(AdapterView<?> adapterView, View view, int position, long l) {
new AlertDialog.Builder(MainActivity.this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage("Are You Sure You Want to Delete This Note?!")
.setTitle("Attempt to Delete A Note")
.setPositiveButton("YES", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
try {
if(notesList!=null){
notesList.remove(position);
arrayAdapter.notifyDataSetChanged();
Toast.makeText(MainActivity.this, "ooooooh No!!", Toast.LENGTH_SHORT).show();
}
}catch (Exception e){
e.printStackTrace();
}
}
})
.setNegativeButton("NO", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this, "Good Choice", Toast.LENGTH_SHORT).show();
}
})
.show();
return true;
}
});

listView.setAdapter(adapter);
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> parent, View view, final int position, long id) {
new AlertDialog.Builder(MainActivity.this)
.setIcon(android.R.drawable.ic_dialog_alert)
.setMessage("Are You Sure You Want to Delete This Note?!")
.setTitle("Attempt to Delete A Note")
.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
try {
dataModels.remove(position);
adapter.notifyDataSetChanged();
Toast.makeText(MainActivity.this, "ooooooh No!!", Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
}
})
.setNegativeButton("NO", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialogInterface, int i) {
Toast.makeText(MainActivity.this, "Good Choice", Toast.LENGTH_SHORT).show();
}
})
.show();
}
});
This is works for me...try this

How to know the pressed button while opening AlertDialog?

i have this:
public void showDialog() {
AlertDialog.Builder builder = new AlertDialog.Builder(updatedActivity.this);
builder.setTitle("Choose the currency you would like to exchange.");
//list of items
String[] items = getResources().getStringArray(R.array.countries_array);
builder.setSingleChoiceItems(items, 0,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
}
});
String positiveText = getString(android.R.string.ok);
builder.setPositiveButton(positiveText,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
//So here i wanna a code like : If pressbutton = buttonto, then buttonto.setText(selecteditem..)
}
});
String negativeText = getString(android.R.string.cancel);
builder.setNegativeButton(negativeText,
new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// negative button logic
}
});
AlertDialog dialog = builder.create();
// display dialog
dialog.show();
}
In the on click event, i wanna know which the button was pressed, so for example if buttonto.ispressed then buttonto.settext(the selected item)
So how to do it
Thanks

Negative and positive buttons not working on emulator

When I setNegativeButton and setPositiveButton in the alert dialog, when I run it on my mobile device which is a Hauweii phone. runs perfect, but when I run it on the emulator, the alertDialog shows but doesn't display the Ok or cancel but I can still click them, it's like there invisible or something, can anyone please help me?
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
public void onItemClick(AdapterView<?> a, View v, int position, long id) {
AlertDialog.Builder alertD=new AlertDialog.Builder(Report.this);
alertD.setTitle("Delete?");
alertD.setMessage("Are you sure you want to delete your Bmi ");
final int positionToRemove = position;
alertD.setNegativeButton("Ok", null);
alertD.setPositiveButton("Cancel", new AlertDialog.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
bmis.remove(positionToRemove);
b.notifyDataSetChanged();
}});
alertD.show();
}
});

Inside your onItemClick
AlertDialog.Builder alertDialog = new AlertDialog.Builder(Report.this);
final int positionToRemove = position;
alertDialog.setTitle("Delete?");
alertDialog.setMessage("Are you sure you want to delete your Bmi "));
// Setting Positive "YES" Button
alertDialog.setPositiveButton("YES", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
bmis.remove(positionToRemove);
b.notifyDataSetChanged();
dialog.dismiss();
}
});
// Setting Negative "CANCEL" Button
alertDialog.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
// Showing Alert Message
alertDialog.show();

Error when removing item in listView

I got error at this line:
alert.setPositiveButton("YES", new DialogInterface.OnClickListener()
Logcat gives this error
java.lang.NullPointerException
Anyone can help me?
//method to remove list item
private void removeItemFromList(int position) {
final int deletePosition = position;
AlertDialog.Builder alert = new AlertDialog.Builder(MainActivity.this);
alert.setTitle("Delete");
alert.setMessage("Do you want delete this item?");
alert.setPositiveButton("YES", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
// TOD O Auto-generated method stub
// main code on after clicking yes
arr.remove(deletePosition);
adapter.notifyDataSetChanged();
adapter.notifyDataSetInvalidated();
}
});
alert.setNegativeButton("CANCEL", new DialogInterface.OnClickListener() {
#Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alert.show();
}

Call removeAt(deletePosition) onClick of Yes
public void removeAt(int deletePosition) {
arr.remove(deletePosition);
notifyItemRemoved(deletePosition);
notifyItemRangeChanged(deletePosition, arr.size());
}

How to call listview with confirmation dialog?

I want to show confirmation dialog box to user that when user click on yes button open listview to select.

Use this link..............................
http://rajeshvijayakumar.blogspot.in/2013/04/alert-dialog-dialog-with-item-list.html

You can go like this
Listview.setOnItemClickListener(new AdapterView.OnItemClickListener()
{
#Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
build = new AlertDialog.Builder(YourActivity.this);
build.setTitle("Title name");
build.setMessage("?");
build.setPositiveButton("Yes", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
//IF yes button pressed then write here
}
dialog.cancel();
}
});
build.setNegativeButton("No", new DialogInterface.OnClickListener()
{
public void onClick(DialogInterface dialog, int which)
{
dialog.cancel();
}
});
AlertDialog alert = build.create();
alert.show();
return true;
}
});