带有复选框的Android联系人选取器

Question

关于同一主题有很多讨论，但在这里花了4个小时后，我找不到有效的描述或链接来制作带有复选框的联系人选取器。

我有一个带有DONE按钮的活动，listview带有checkbox。我已设法正确显示联系人。现在我想在bundle中返回所选的联系人电话号码（我认为这是最好的方法），这样我就可以在onActivityResult()中获得号码列表。我不确定我所遵循的方式是否正确。

这是我的代码：

public class ContactPickerMulti extends ListActivity implements OnClickListener {
    // List variables
    public String[] Contacts = {};
    public int[] to = {};
    public ListView myListView;
    Button save_button;
    private TextView phone;
    private String phoneNumber;
    private Cursor cursor;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.contacts_multi);
        // Initializing the buttons according to their ID
        save_button = (Button) findViewById(R.id.contact_done);
        // Defines listeners for the buttons
        save_button.setOnClickListener(this);
        Cursor mCursor = getContacts();
        startManagingCursor(mCursor);
        ListAdapter adapter = new SimpleCursorAdapter(
                this,
                android.R.layout.simple_list_item_multiple_choice,
                mCursor,
                Contacts = new String[] { ContactsContract.Contacts.DISPLAY_NAME },
                to = new int[] { android.R.id.text1 });
        setListAdapter(adapter);
        myListView = getListView();
        myListView.setItemsCanFocus(false);
        myListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
    }
    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.HAS_PHONE_NUMBER + " = '"
                + ("1") + "'";
        String[] selectionArgs = null;
        String sortOrder = ContactsContract.Contacts.DISPLAY_NAME
                + " COLLATE LOCALIZED ASC";
        return managedQuery(uri, projection, selection, selectionArgs,
                sortOrder);
    }
    public void onClick(View src) {
        Intent i;
        switch (src.getId()) {
        case R.id.contact_done:
            SparseBooleanArray selectedPositions = myListView
                    .getCheckedItemPositions();
            SparseBooleanArray checkedPositions = myListView
                    .getCheckedItemPositions();
            if (checkedPositions != null) {
                for (int k = 0; k < checkedPositions.size(); k++) {
                     if (checkedPositions.valueAt(k)) {
                          String name =
                                 ((Cursor)myListView.getAdapter().getItem(k)).getString(1);
                            Log.i("XXXX",name + " was selected");
                        }
                }
            }
            break;
        }
    }
}

我想以数组或列表的形式发送数字。最好的方法是什么？任何帮助或引导正确的道路都将不胜感激。

Answer 1

我在onClick:中使用此代码

long[] id = getListView().getCheckedItemIds();//  i get the checked contact_id instead of position
        phoneNumber = new String[id.length];
        for (int i = 0; i < id.length; i++) {
            phoneNumber[i] = getPhoneNumber(id[i]); // get phonenumber from selected id
        }
        Intent pickContactIntent = new Intent();
        pickContactIntent.putExtra("PICK_CONTACT", phoneNumber);// Add checked phonenumber in intent and finish current activity.
        setResult(RESULT_OK, pickContactIntent);
        finish();

//

private String getPhoneNumber(long id) {
    String phone = null;
    Cursor phonesCursor = null;
    phonesCursor = queryPhoneNumbers(id);
    if (phonesCursor == null || phonesCursor.getCount() == 0) {
        // No valid number
        signalError();
        return null;
    } else if (phonesCursor.getCount() == 1) {
        // only one number, call it.
        phone = phonesCursor.getString(phonesCursor
                .getColumnIndex(Phone.NUMBER));
    } else {
        phonesCursor.moveToPosition(-1);
        while (phonesCursor.moveToNext()) {
            // Found super primary, call it.
            phone = phonesCursor.getString(phonesCursor
                    .getColumnIndex(Phone.NUMBER));
            break;
        }
    }
    return phone;
}

private Cursor queryPhoneNumbers(long contactId) {
    ContentResolver cr = getContentResolver();
    Uri baseUri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI,
            contactId);
    Uri dataUri = Uri.withAppendedPath(baseUri,
            ContactsContract.Contacts.Data.CONTENT_DIRECTORY);
    Cursor c = cr.query(dataUri, new String[] { Phone._ID, Phone.NUMBER,
            Phone.IS_SUPER_PRIMARY, RawContacts.ACCOUNT_TYPE, Phone.TYPE,
            Phone.LABEL }, Data.MIMETYPE + "=?",
            new String[] { Phone.CONTENT_ITEM_TYPE }, null);
    if (c != null && c.moveToFirst()) {
        return c;
    }
    return null;
}

以及您启动PickContactsActivity 的活动的最后一个onActivityResult

    // TODO Auto-generated method stub
    // super.onActivityResult(requestCode, resultCode, data);
    if (resultCode == RESULT_OK) {
        if (requestCode == Constants.REQUEST_CODE_PICK_CONTACT) {

            if (data != null) {
                String[] temp = data.getStringArrayExtra("PICK_CONTACT");
            }
        }
    }
}

Answer 2

在newActivity中使用startActivityForResult(newActivity)时，必须先调用setResult(RESULT_OK)，然后调用finish()以关闭Activity。您可以选择在对setResult(RESULT_OK, intent)的调用中包含Intent。对setResult()的调用将导致调用onActivityResult()的实现，在那里您可以处理Activity的结果。因此，在您的情况下，只需创建一个Intenet，并使用putExtra()方法之一将数组列表添加到其中。然后，该Intent将被传递给onActivityResult()，在那里您可以提取该信息。有关更多信息，请参阅意向和活动。