下面是我的代码,实际上屏幕上没有显示任何联系人。在模拟器中我添加了5个联系人。请告诉我该怎么做。

{
    //some code
    Cursor cur = getContacts();
    String[] fields = new String[] {ContactsContract.Data.DISPLAY_NAME};
    SimpleCursorAdapter adapter =
        new SimpleCursorAdapter(this,
                                R.layout.list_view_item_new,
                                cur,
                                fields,
                                new int[] {R.id.contactEntryText});
    lv.setAdapter(adapter);
}

private Cursor getContacts() {
    // Run query
    Uri uri = ContactsContract.Contacts.CONTENT_URI;
    String[] projection =
        new String[]{ ContactsContract.Contacts._ID,
                      ContactsContract.Contacts.DISPLAY_NAME };
    String selection = null;
    String[] selectionArgs = null;
    String sortOrder = ContactsContract.Contacts.DISPLAY_NAME +
        " COLLATE LOCALIZED ASC";
    return managedQuery(uri, projection, selection, selectionArgs, sortOrder);
}

最佳答案

我复制并执行了几乎相同的代码,它工作正常:

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        Cursor cur = getContacts();

        ListView lv = getListView();

       String[] fields = new String[] {ContactsContract.Data.DISPLAY_NAME};

       SimpleCursorAdapter adapter =
                new SimpleCursorAdapter(this,
                                        R.layout.main,
                                        cur,
                                        fields,
                                        new int[] {R.id.txtbox});
          lv.setAdapter(adapter);
    }

    private Cursor getContacts() {
        // Run query
        Uri uri = ContactsContract.Contacts.CONTENT_URI;

        String[] projection =
                new String[]{ ContactsContract.Contacts._ID,
                              ContactsContract.Contacts.DISPLAY_NAME };
            String selection = null;
            String[] selectionArgs = null;
            String sortOrder = ContactsContract.Contacts.DISPLAY_NAME +
                " COLLATE LOCALIZED ASC";
            return managedQuery(uri, projection, selection, selectionArgs, sortOrder);
    }

请检查是否在textview实现中做错了什么?

10-07 19:24
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