用裝載器管理器讀取聯繫人

Question

我試圖利用LoaderManager和CursorLoader來讀取聯繫人的電話號碼。我能夠讀取聯繫人的顯示名稱，但我不知道如何閱讀電話號碼。任何指導將不勝感激。

// These are the Contacts rows that we will retrieve. 
static final String[] CONTACTS_SUMMARY_PROJECTION = new String[] { 
     Contacts._ID, Contacts.DISPLAY_NAME, 
     ContactsContract.CommonDataKinds.Phone.NUMBER }; 

// This is the Adapter being used to display the list's data. 
SimpleCursorAdapter mAdapter; 

// If non-null, this is the current filter the user has provided. 
String mCurFilter; 

@Override 
public void onActivityCreated(Bundle savedInstanceState) { 
    super.onActivityCreated(savedInstanceState); 

    // Give some text to display if there is no data. In a real 
    // application this would come from a resource. 
    setEmptyText("No phone numbers"); 

    // Create an empty adapter we will use to display the loaded data. 
    mAdapter = new SimpleCursorAdapter(getActivity(), 
      android.R.layout.simple_list_item_2, null, new String[] { 
        Contacts.DISPLAY_NAME, ContactsContract.CommonDataKinds.Phone.NUMBER }, 
      new int[] { android.R.id.text1, android.R.id.text2 }, 0); 

    setListAdapter(mAdapter); 

    // Start out with a progress indicator. 
    setListShown(false); 

    // Prepare the loader. Either re-connect with an existing one, 
    // or start a new one. 
    getLoaderManager().initLoader(0, null, this); 
} 

@Override 
public void onListItemClick(ListView l, View v, int position, long id) { 

    Log.i("FragmentComplexList", "Item clicked: " + id); 
} 

public Loader<Cursor> onCreateLoader(int id, Bundle args) { 
    // This is called when a new Loader needs to be created. This 
    // sample only has one Loader, so we don't care about the ID. 
    // First, pick the base URI to use depending on whether we are 
    // currently filtering. 
    Uri baseUri; 
    if (mCurFilter != null) { 
     baseUri = Uri.withAppendedPath(Contacts.CONTENT_FILTER_URI, 
       Uri.encode(mCurFilter)); 
    } else { 
     baseUri = Contacts.CONTENT_URI; 
    } 

    // Now create and return a CursorLoader that will take care of 
    // creating a Cursor for the data being displayed. 
    String select = "((" + Contacts.DISPLAY_NAME + " NOTNULL) AND (" 
      + Contacts.HAS_PHONE_NUMBER + "=1) AND (" 
      + Contacts.DISPLAY_NAME + " != ''))"; 
    return new CursorLoader(getActivity(), baseUri, 
      CONTACTS_SUMMARY_PROJECTION, select, null, 
      Contacts.DISPLAY_NAME + " COLLATE LOCALIZED ASC"); 
} 

public void onLoadFinished(Loader<Cursor> loader, Cursor data) { 
    // Swap the new cursor in. (The framework will take care of closing the 
    // old cursor once we return.) 
    mAdapter.swapCursor(data); 

    // The list should now be shown. 
    if (isResumed()) { 
     setListShown(true); 
    } else { 
     setListShownNoAnimation(true); 
    } 
} 

public void onLoaderReset(Loader<Cursor> loader) { 
    // This is called when the last Cursor provided to onLoadFinished() 
    // above is about to be closed. We need to make sure we are no 
    // longer using it. 
    mAdapter.swapCursor(null); 
} 

Answer 1

試試這個..這對我有效！

// This is the Adapter being used to display the list's data. 
    SimpleCursorAdapter mAdapter; 

    // If non-null, this is the current filter the user has provided. 
    String mCurFilter; 

    @Override public void onActivityCreated(Bundle savedInstanceState) { 
     super.onActivityCreated(savedInstanceState); 

     // Give some text to display if there is no data. In a real 
     // application this would come from a resource. 
     setEmptyText("No phone numbers"); 

     // We have a menu item to show in action bar. 
     setHasOptionsMenu(true); 

     // Create an empty adapter we will use to display the loaded data. 
     mAdapter = new SimpleCursorAdapter(getActivity(), 
       android.R.layout.simple_list_item_1, null, 
       new String[] { ContactsContract.CommonDataKinds.Phone.NUMBER, }, 
       new int[] { android.R.id.text1}, 0); 
     setListAdapter(mAdapter); 

     // Start out with a progress indicator. 
     setListShown(false); 

     // Prepare the loader. Either re-connect with an existing one, 
     // or start a new one. 
     getLoaderManager().initLoader(0, null, this); 
    } 

    @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { 
     // Place an action bar item for searching. 
     MenuItem item = menu.add("Search"); 
     item.setIcon(android.R.drawable.ic_menu_search); 
     item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); 
     View searchView = SearchViewCompat.newSearchView(getActivity()); 
     if (searchView != null) { 
      SearchViewCompat.setOnQueryTextListener(searchView, 
        new OnQueryTextListenerCompat() { 
       @Override 
       public boolean onQueryTextChange(String newText) { 
        // Called when the action bar search text has changed. Update 
        // the search filter, and restart the loader to do a new query 
        // with this filter. 
        mCurFilter = !TextUtils.isEmpty(newText) ? newText : null; 
        getLoaderManager().restartLoader(0, null, CursorLoaderListFragment.this); 
        return true; 
       } 
      }); 
      item.setActionView(searchView); 
     } 
    } 

    @Override public void onListItemClick(ListView l, View v, int position, long id) { 
     // Insert desired behavior here. 
     Log.i("FragmentComplexList", "Item clicked: " + id); 
    } 

    // These are the Contacts rows that we will retrieve. 
    static final String[] CONTACTS_SUMMARY_PROJECTION = new String[] { 
     ContactsContract.CommonDataKinds.Phone._ID, 
     ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME, 
     ContactsContract.CommonDataKinds.Phone.NUMBER, 
    }; 

    public Loader<Cursor> onCreateLoader(int id, Bundle args) { 
     // This is called when a new Loader needs to be created. This 
     // sample only has one Loader, so we don't care about the ID. 
     // First, pick the base URI to use depending on whether we are 
     // currently filtering. 
     Uri baseUri; 
     if (mCurFilter != null) { 
      baseUri = Uri.withAppendedPath(ContactsContract.CommonDataKinds.Phone.CONTENT_FILTER_URI, Uri.encode(mCurFilter)); 
     } else { 
      baseUri = ContactsContract.CommonDataKinds.Phone.CONTENT_URI; 
     } 

     // Now create and return a CursorLoader that will take care of 
     // creating a Cursor for the data being displayed. 
     String select = "((" + ContactsContract.Contacts.DISPLAY_NAME + " NOTNULL) AND (" 
       + ContactsContract.Contacts.DISPLAY_NAME + " != '')" + "AND ("+ContactsContract.Contacts.HAS_PHONE_NUMBER +" != '0'"+"))"; 

     return new CursorLoader(getActivity(), baseUri, 
       CONTACTS_SUMMARY_PROJECTION, null, null, 
       null + " COLLATE LOCALIZED ASC"); 
    } 

    public void onLoadFinished(Loader<Cursor> loader, Cursor data) { 
     // Swap the new cursor in. (The framework will take care of closing the 
     // old cursor once we return.) 
     mAdapter.swapCursor(data); 

     // The list should now be shown. 
     if (isResumed()) { 
      setListShown(true); 
     } else { 
      setListShownNoAnimation(true); 
     } 
    } 

    public void onLoaderReset(Loader<Cursor> loader) { 
     // This is called when the last Cursor provided to onLoadFinished() 
     // above is about to be closed. We need to make sure we are no 
     // longer using it. 
     mAdapter.swapCursor(null); 
    } 
}