Implement searchview on string type listview Android

问题

I have a list of items and i want to start different activity on the basis of item, when i click it opens the correct activity but when i try to search list items from search view bar then it opens wrong activities.

    listView = (ListView) findViewById(R.id.listView);
    sv=(SearchView) findViewById(R.id.searchView1);
    String[] values = new String[]{item1,item2,item3,item4,}
    final ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_2, android.R.id.text1, values);
    listView.setAdapter(adapter);
    //linking from 1 item to other activity stars with if options//
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view,
                                int position, long id) {
            if (position == 0) {
                Intent myIntent = new Intent(view.getContext(), activity1.class);
                startActivityForResult(myIntent,0);
            }

            if (position == 4) {
                Intent myIntent = new Intent(view.getContext(), aactivity4.class);
                startActivityForResult(myIntent,0);

            }
        }
    });

    sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String text) {
            // TODO Auto-generated method stub
            return false;
        }
        @Override
        public boolean onQueryTextChange(String text) {
            adapter.getFilter().filter(text);
            return false;
        }
    });

I don't know much about coding but can any one solve my problem..

回答1:

you are starting your activity on the basis of position but the position will be changed when you do the search because list will shrink and positions will change so to get data associated with the specified position in the list use getItemAtPosition

so changes conditions on the basis of data

 if (parent.getItemAtPosition(position).equals("item1")) {
                Intent myIntent = new Intent(view.getContext(), activity1.class);
                startActivityForResult(myIntent,0);
            }

else if (parent.getItemAtPosition(position).equals("item2")) { // use any item value here you want 
                Intent myIntent = new Intent(view.getContext(), aactivity4.class);
                startActivityForResult(myIntent,0);
            }

Note : you can use switch as well instead of long if or else-if ladder

e.g You have three string

item 1   position 0
item 2   position 1
item 3   position 2

after searching item 2 you have two values in your list close to your search

item 2   position 0
item 3   position 1

so position will change so don't use it instead use the data

Code

       listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view,
                                    int position, long id) {
                Intent intent = null;
                // global string to class
                selectedValue = String.valueOf(parent.getItemAtPosition(position));

                if (selectedValue.equals("item1")) {
                                        // ^^^  use any item value here you want
                    Intent myIntent = new Intent(view.getContext(), activity1.class);
                    startActivityForResult(myIntent,0);
                }

                else if (selectedValue.equals("item2")) {
                    Intent myIntent = new Intent(view.getContext(), aactivity4.class);
                    startActivityForResult(myIntent,0);
                }
            }
        });

来源：https://stackoverflow.com/questions/41482656/implement-searchview-on-string-type-listview-android

标签

android

listview

searchview