单击ListView项时将_id从一个活动传递到另一个活动

Question

I have a problem. In my activity i have a ListView whose values are compiled from a Database. The database returns three columns: _Id, AccountName and Comments. What i want is that the when the user clicks on one of the items in the listView, that Item's position will be extracted and then that position will be compared with the postion in the ArrayList which has the data and then when the specific field and row is found out, the _Id field will be taken out and passed to another activity in the form of a String. You may not have understood much; this might help:

public void search(View view){
    final ListView vLst_IDCommName=(ListView)findViewById(R.id.lst_IDCommName);
    EditText vTxt_searchTxt=(EditText)findViewById(R.id.search_txt);
    String srch_str= vTxt_searchTxt.getText().toString();

    if(srch_str.length()>0){
        //The DataSource for the LstView
        List<Comment> values = datasource.getContacts(srch_str);

        ArrayAdapter<Comment> adapter = new ArrayAdapter<Comment>(this, android.R.layout.simple_list_item_1, values);
        vLst_IDCommName.setAdapter(adapter);
    }
    else{
        Toast.makeText(getBaseContext(), "Please type in a value to proceed!", Toast.LENGTH_LONG).show();
    }

    vLst_IDCommName.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
            //Here I want to create a function that will take the position of the item clicked
            //and then searched for that position in the ArrayList and then return the _Id of 
            //the account whose value was clicked.

    }});  
}

This code I used to get data:

public List<Comment> getContacts(String search_str) { 
    List<Comment> comments = new ArrayList<Comment>(); 
    String srch_str=(String) search_str; 
    Cursor cur_comments= database.rawQuery("Select * from comments where acc_name like('%"+srch_str+"%')"+" "+ "or comment like('%"+srch_str+"%')", null); 
    cur_comments.moveToFirst(); 
    while (!cur_comments.isAfterLast()) { 
        Comment comment = cursorToComment(cur_comments); 
        comments.add(comment); cur_comments.moveToNext(); 
        } 
    cur_comments.close(); 
    return comments; 
} 

Any feedback would be appreciated.

Answer 1

you can try

 public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
    String currentId=yourArrayList.get(position).toString();
         }

Answer 2

vLst_IDCommName.setOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
      Object s=parent.getItemAtPosition(position);
      String j=s.toString();
}});