数组索引超出范围，希望使用基本适配器在列表视图中显示内容提供者保存项

Question

抛出数组索引超出范围..

public class CustomProviderDemo extends ListActivity {
private EditText mContactNameEditText;
private TextView mContactsText;
private Button mContactSaveButton;
static String id = null;
static String userName = null;
static String[] usr;
@Override


 }



            }