小编Deo*_*art的帖子

如何解决给定的错误？当我尝试从操作栏刷新光标时会发生这种情况，有时当我在长按列表项后再次尝试删除时会发生这种情况。

主活动.java

public class MainActivity extends AppCompatActivity {
private final String QUERY_SELECTALL = "SELECT * FROM " + RjecnikDB.TABLE;
private RjecnikCursorAdapter adapter;
private RjecnikDB dbRjecnik;
private SQLiteDatabase db;
private Cursor cursor;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

@Override
protected void onRestart() {
    super.onRestart();
    refresh();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.menu_main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();

    if (id == R.id.search_bar) {
        return true;
    } else if (id …