一帧实现两个列表视图

Question

i'm working on two listviews in a same activity in which there are 3 strings in 1st one and the 2nd listview is blank . i want to trasfer the values of first list into second list, whenever any value is pressed.

listView1.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view,
                int position, long id) {

            // ListView Clicked item index
            int itemPosition = position;

            // ListView Clicked item value
            String itemValue = (String) listView1
                    .getItemAtPosition(position);


            secoundList.add(itemValue);
            firstList.remove(position);


            Toast.makeText(
                    getApplicationContext(),
                    "Position :" + itemPosition + "  ListItem : "
                            + itemValue, Toast.LENGTH_SHORT).show();


        }

    });

But everytime i get error in logcat that "the content of adapter has changed but listview didnot recieve any notification " The error of the log cat that "make sure the content of adapter is not modified from a background thread"

Answer 1

您必须在修改列表后调用此方法。

listAdapter.notifyDataSetChanged();

Answer 2

If I understand your question right, then you r trying to selected listitem from one list you want to show that selected list item in second list view.?

I will give You question according to what i understand.

so first of all you need to initilize the first list with item.

ListView listview1 = findViewBId(---------);
ListView listview2 = findViewBId(---------);

ArrayList<String> list1 = new ArrayList<String>();
list1.add("abc");
list1.add("pqr");
list1.add("pqr");
--------------------

ArrayList<String> list2 = new ArrayList<String>();
ArrayAdapter<String> adapter1 = new ArrayAdapter<String>(context, resource, list1 );
 listView1.setAdapter(adapter1 );

ArrayAdapter<String> adapter2 = new ArrayAdapter<String>(context, resource, list2 );
 listView1.setAdapter(adapter2 );
listView1.setOnItemClickListener(this);


onItemClick(AdapterView<?> parent, View view, int position, long id) {

list2.add(list1.get(position));
adapter2.notifyDataSetChanged();

}