I want to know how to check the value of the column you want when you click on the item in Android ListView

Currently, I am using a list view with 4 columns using an adapter within the code. When I click an item here, I want to look up only some columns of the items that were clicked, so is there a way?

 @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.city_list);



        db = new DBHelper(this);


        list = (ListView)findViewById(R.id.city_list);
        db.getListContents();

        final ArrayList<InfoClass> weatherList = new ArrayList<InfoClass>();
        Cursor data = db.getListContents();

        if(data.getCount() == 0){
            Toast.makeText(this, "There are no contents in this list!",Toast.LENGTH_LONG).show();
        }else{
            while(data.moveToNext()){
                InfoClass newInfo = new InfoClass(data.getString(1), data.getString(2), data.getString(3), data.getString(4));
                weatherList.add(newInfo);
                DBAdapter dbAdapter = new DBAdapter(this, weatherList);
                list.setAdapter(dbAdapter);
            }
        }


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

               /* /* TextView item_latitude = (TextView)findViewById(R.id.item_latitude);
                TextView item_longitude = (TextView)findViewById(R.id.item_longitude);
                data_longitude = item_latitude.getText().toString();
                data_latitude = item_longitude.getText().toString();*/

                Intent intent = new Intent(CityList.this, MainActivity.class);

                intent.putExtra("data_latitude", data_latitude);
                intent.putExtra("data_longitude", data_longitude);


                setResult(Activity.RESULT_OK, intent);
                finish();


            }
        });

    }

listview itemclicked

2022-09-22 19:28

1 Answers

First, you must register listener(OnItemClickListener) to detect one item being clicked in the ListView.

You can create a listener as an anonymous class, or you can create an object and register it.

If you implement it as an anonymous class, you can do it as follows.

listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        // Position is the clicked position. 
        // You can take it out of the collection and use it properly.
        Toast.makeText(getApplicationContext(), itemList.get(position).getSomethingColumn(), Toast.LENGTH_LONG).show();

        // Additional parts
        InfoClass selectedInfoClass = weatherList.get(position);
        selectedInfoClass.getXXX();
    }
});

2022-09-22 19:28

If you have any answers or tips

Popular Tags

python x 4647

android x 1593

java x 1494

javascript x 1427

c x 927

c++ x 878

ruby-on-rails x 696

php x 692

python3 x 685

html x 656