使用SimpleCursorAdapter过滤ListView不会显示结果

Question

我是android新手。我的问题 - 没有从数据库中填充的过滤列表。     我已经阅读了许多与我相同问题的文章和例子，并花了很多时间。     我无法理解我的错误并找到解决方案。我陷入了僵局。     为了得到理想的结果我必须改变什么？

    public class MainActivity extends Activity { 

    public ListView listView;
    public EditText editSearch;
    public DataBaseHelper dataBase;   
    public Cursor cursor;
    public SimpleCursorAdapter scAdapter;
    private boolean langChangeMenu;
    public void fillList(final boolean lang) {
    String[] from;
    int[] to;
    listView.setAdapter(null);
    if (lang == true) {// true
        cursor = dataBase.getAllDataZGERMRUS();
        from = new String[] { "ZGERMGR", "ZRUSGR" };
        to = new int[] { R.id.word_name, R.id.word_name2 };
    } 
    else {
        cursor = dataBase.getAllDataZRUSGR();
        from = new String[] { "ZGERMRG", "ZRUSRG" };
        to = new int[] { R.id.word_name2, R.id.word_name };
    }
    scAdapter = new SimpleCursorAdapter(this, R.layout.list_item, cursor,from, to);
    listView.setAdapter(scAdapter);
    listView.setFastScrollEnabled(true);
    listView.setTextFilterEnabled(true);
    editSearch.addTextChangedListener(new TextWatcher() {
        @Override
        public void onTextChanged(CharSequence s, int start, int before,int count) {
            scAdapter.getFilter().filter(s.toString());
        }
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,int after) {
        }
        @Override
        public void afterTextChanged(Editable s) {
        }
    });
        @Override
        public void onTextChanged(CharSequence s, int start, int before,int count) {
            scAdapter.getFilter().filter(s.toString());
        }
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,int after) {
        }
        @Override
        public void afterTextChanged(Editable s) {
        }
        });
        scAdapter.setFilterQueryProvider(new FilterQueryProvider() {
            @Override
            public Cursor runQuery(CharSequence constraint) {
                if (lang){
                return dataBase.getForSearchZGERMRUS(constraint.toString());
                }
                else{
                    return dataBase.getForSearchZRUSGERM(constraint.toString());
                }
            }
        });
    }
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        preferences = getPreferences(MODE_PRIVATE);
        langChangeMenu = preferences.getBoolean("langBool", true);
        listView = (ListView) findViewById(R.id.listView1);
        editSearch = (EditText) findViewById(R.id.editText1);
        runDataBase();
        fillList(langChangeMenu);
    }
}

functions from DataBase.class

    public Cursor getForSearchZGERMRUS(CharSequence constraint){
        return myDataBase.query("ZGERMRUS",fieldsGERMRUS, constraint.toString(), null, null, null,null);
    }   
    public Cursor getForSearchZRUSGERM(CharSequence constraint){
        return myDataBase.query("ZRUSGERM",fieldsRUSGERM, constraint.toString(), null, null, null,null);
}