Set value and Get the values of all the items in the listview Android

Question

I have a ListView which is :

<ListView
        android:id="@+id/list"
        android:layout_width="290dp"
        android:layout_height="166dp"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="10dp"
        android:visibility="gone"
        android:choiceMode="singleChoice" />

And there is ImageView

<ImageView
        android:id="@+id/cont"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginLeft="20dp"
        android:layout_marginTop="30dp"
        android:src="@drawable/img" />  

How I am adding data in my listview.

  ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1, android.R.id.text1, list);
            listView.setAdapter(adapter);
            listView.setOnItemClickListener(new OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view,
                        int position, long id) {


                }
            });

I am trying to update the listview value :

View v=listView.getChildAt(position);
                    TextView tv= (TextView) v.findViewById(android.R.id.text1);
                    tv.setText(firstNameDialog.getText().toString().trim().toString()+" "+lastNameDialog.getText().toString().trim().toString());

But this is not changing the value

I want that when the image view is clicked then I can get the values of the listview item to get stored in the form of array. How could i get all the items values of a listview and how could set the values again on the clicked item

Gosse

simply use ImageView onClick and you have already ListView data in list. – Tulley

actually after the listview is getting set by adapter values .then i am setting up new data on click on each item.Or i can say that i am changing the data of the items on click – Gosse

on click of the item i am opening a custom dialog .in that there is a edit text in that the user is entering a name.them i am setting that name on the item clicked by the user from the listview – Gosse

May be you store your data anywhere after changing. so use that.. – Tulley

Answer 1

imageView.setOnClickListener(new View.OnClickListener() {

            public void onClick(View v) {
                int count = listView.getAdapter().getCount();
                String[] listData = new String[count];
                for (int i = 0; i < count; i++) {
                    listData[i] = listView.getAdapter().getItem(i).toString();
                }
            }
        });

Tulley

how about setting the item values i have the position – Gosse

@User not getting you...now what an issue? – Tulley

i am asking if i have the postion of the item .den how could i settext on that item of the listview – Gosse

you are using list for display data so change in list like as list[posistion]="your value" and set adapater.notifyDataSetChanged() – Tulley

if i am doing this it is showin this error "The type of the expression must be an array type but it resolved to ListView" – Gosse

Answer 2

The process is quite simple, what you can do is, on clicking the image view, iterate through the array adapter which you are using to populate the listview. while iterating you can declare an array and keep inserting the iterated values inside it. Hope it helps!

Gee

Answer 3

int wantedPosition = position; // Whatever position you're looking for
int firstPosition = mList.getFirstVisiblePosition() -mList.getHeaderViewsCount();

int wantedChild = wantedPosition - firstPosition;
if (wantedChild < 0 || wantedChild >= mList.getChildCount()) {
    return;
}

Button btnEdit = (Button)wantedView.findViewById(R.id.btnEdit);
btnEdit.setText("my new message");

Have you tried something like this

Heer

Answer 4

Use the adapter. In cycle get the values from adapter :

StringBuilder b = new StringBuilder();
for(int i=0;i>adapter.getCount();i++)
    b.append(adapter.getItem(i));//May be toString() should be used.

Erumpent

This should be i < adapter.getCount();. As it currently stands, this is an infinite loop. – Jaddo

It's not an infinite loop - it will simply never reach the append statement because the i integer (starting at 0) will never be greater than adapter.getCount() unless the adapter somehow had a count of -1. – Theoretical

Answer 5

for changing values of a list item you should do it in the adapter class. so if your item has a TextViewyou should write a method in adapter like this

public void changeText(String newValue) {
this.myTextView.setText(newValue);
}

this is also the case when using view holder. for getting all the items values, basically you should do what first answer said.

imageView.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { int count = listView.getAdapter().getCount(); String[] listData = new String[count]; for (int i = 0; i < count; i++) { listData[i] = listView.getAdapter().getItem(i).toString(); } } }); but except getCount you could use size(). but at least for me these relations between adapter and list is a little confusing. hope it helps.

Morning