我想要一个我的联系人ListView.
我使用Google示例代码.
问题是我一遍又一遍地得到相同的联系人:
我使用Google示例代码.
问题是我一遍又一遍地得到相同的联系人:
>吉姆
>吉姆
>吉姆
>吉姆
>吉姆
>安娜
>安娜
>安娜
>安娜
> ……
如何获得我的联系人的disTINCT列表?
public class ContactsListView extends ListActivity implements LoaderManager.LoaderCallbacks<Cursor> { SimpleCursorAdapter mAdapter; static final String[] PROJECTION = new String[] {ContactsContract.Data._ID,ContactsContract.Data.disPLAY_NAME}; static final String SELECTION = ContactsContract.Contacts.IN_VISIBLE_GROUP + " = '" + ("1") + "'"; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Create a progress bar to display while the list loads ProgressBar progressBar = new ProgressBar(this); progressBar.setLayoutParams(new LayoutParams(LayoutParams.WRAP_CONTENT,Gravity.CENTER)); progressBar.setIndeterminate(true); getListView().setEmptyView(progressBar); // Must add the progress bar to the root of the layout ViewGroup root = (ViewGroup) findViewById(android.R.id.content); root.addView(progressBar); // For the cursor adapter,specify which columns go into which views String[] fromColumns = {ContactsContract.Data.disPLAY_NAME}; int[] toViews = {android.R.id.text1}; // The TextView in simple_list_item_1 // Create an empty adapter we will use to display the loaded data. // We pass null for the cursor,then update it in onLoadFinished() mAdapter = new SimpleCursorAdapter(this,android.R.layout.simple_list_item_1,null,fromColumns,toViews,0); setlistadapter(mAdapter); // Prepare the loader. Either re-connect with an existing one,// or start a new one. getLoaderManager().initLoader(0,this); } // Called when a new Loader needs to be created public Loader<Cursor> onCreateLoader(int id,Bundle args) { // Now create and return a CursorLoader that will take care of // creating a Cursor for the data being displayed. return new CursorLoader(this,ContactsContract.Data.CONTENT_URI,PROJECTION,SELECTION,ContactsContract.Contacts.disPLAY_NAME + " COLLATE LOCALIZED ASC"); } // Called when a prevIoUsly created loader has finished loading 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); } // Called when a prevIoUsly created loader is reset,making the data unavailable 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); } @Override public void onListItemClick(ListView l,View v,int position,long id) { // String itemValue = (String) l.getItemAtPosition(position); } }
解决方法
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