android - getItemAtPosition() 如何从 ListView 中的选定项获取可读数据

Question

我有一个从 Android ContactManager 示例中获得的联系人 ListView 。此列表显示正常，但我不知道如何从所选项目中获取信息，例如“姓名”和“电话号码”。

我可以获得选定的位置，但 mContactList.getItemAtPosition(position) 的结果是 ContentResolver$CursorWrapperInner，这对我来说没有任何意义。我无法从中得到正面或反面。

有谁知道如何从 ListView 中的选定项目中获取姓名/身份证/电话号码？

这是我的代码。

@Override
public void onCreate(Bundle savedInstanceState)
{
    Log.v(TAG, "Activity State: onCreate()");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.choose_contact);

    // Obtain handles to UI objects
    mAddAccountButton = (Button) findViewById(R.id.addContactButton);
    mContactList = (ListView) findViewById(R.id.contactList);
    mShowInvisibleControl = (CheckBox) findViewById(R.id.showInvisible);

    // Initialize class properties
    mShowInvisible = false;
    mShowInvisibleControl.setChecked(mShowInvisible);
    mContactList.setOnItemClickListener(new OnItemClickListener()
    {
      public void onItemClick(AdapterView<?> parent, View view, int position, long id)
      {
       addContactAt(position);
      }
    });
    mShowInvisibleControl.setOnCheckedChangeListener(new OnCheckedChangeListener() {
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            Log.d(TAG, "mShowInvisibleControl changed: " + isChecked);
            mShowInvisible = isChecked;
            populateContactList();
        }
    });

    // Populate the contact list
    populateContactList();

}

/**
 * Populate the contact list based on account currently selected in the account spinner.
 */
private SimpleCursorAdapter adapter;
private void populateContactList() {
    // Build adapter with contact entries
    Cursor cursor = getContacts();
    String[] fields = new String[] {
            ContactsContract.Data.DISPLAY_NAME
    };
    adapter = new SimpleCursorAdapter(this, R.layout.contact_entry, cursor,
            fields, new int[] {R.id.contactEntryText});
    mContactList.setAdapter(adapter);
}

/**
 * Obtains the contact list for the currently selected account.
 *
 * @return A cursor for for accessing the contact list.
 */
private Cursor getContacts()
{
    // Run query
    Uri uri = ContactsContract.Contacts.CONTENT_URI;
    String[] projection = new String[] {
            ContactsContract.Contacts._ID,
            ContactsContract.Contacts.DISPLAY_NAME
    };
    String selection = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" +
            (mShowInvisible ? "0" : "1") + "'";
    String[] selectionArgs = null;
    String sortOrder = ContactsContract.Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC";

    return managedQuery(uri, projection, selection, selectionArgs, sortOrder);
}

private void addContactAt(int position)
{
 Object o = mContactList.getItemAtPosition(position);
}

}`

Answer 1

@Override
protected void onListItemClick(ListView l, View v, int position, long ida) {
   super.onListItemClick(l, v, position, ida);

   Cursor mycursor = (Cursor) getListView().getItemAtPosition(position);
   showToast("mycursor.getString(1) " + mycursor.getString(1) +"   ");