在另一个活动中单击项目时从列表视图中获取id

Question

The code below give generate the ListView

public class MyList extends ListActivity {
static final String[] COUNTRIES = new String[] {LONG LIST OF COUNTRIES};
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setListAdapter(new ArrayAdapter<String>(this,R.layout.main,COUNTRIES));
    ListView lv=getListView();
    lv.setTextFilterEnabled(true);
    lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent,View view,int position,long id){
        Intent i=new Intent(MyList.this,Another.class);
        Bundle b = new Bundle();
                          b.putInt("id", (int)id);
                          intent.putExtras(b);
                          startActivity(intent);
        }
    });
  }
}

Another activity is

public class Another extends Activity{
  public void onCreate(Bundle icicle) {
  super.onCreate(icicle);
  setContentView(R.layout.mainseocnd);
  Bundle b=new Bundle();
  int value= b.getInt("id",0);
  TextView tv=(TextView)findViewById(R.id.text);
  tv.setText(""+value);  
  }
}

Now when i click on the any list item say id-5 it always display 0 I want to get the listview item id like if user click second item in list the another acivity should display 1(b/c start with 0). please correct me where it is going wrong. Thanks in advance!!

Answer 1

In second activity instead of

Bundle b=new Bundle();
int value= b.getInt("id",0); 

use

int value = icicle.getInt("id",0);

This will give you a solution... :)

Answer 2

Your way of retrieving the value is wrong:

Bundle b=new Bundle();
int value= b.getInt("id",0);

You create a new bundle and try to get a value from it, when there is none (it's new) . You have to get the extras supplied with the launch intent for that activity instead. Try

int value = getIntent().getIntExtra("id", 0);

instead.