Question

我想要做的是点击列表视图的项目从另一个片段调用。程序构建没有错误，但点击项目时崩溃。顺便说一下，我在这里制作了局部Fragment_3对象，我已经在我的mainactivity中完成了它，如何将它传递给这个函数？

Fragment_1.java内容：

public class Fragment_1 extends SherlockFragment implements OnItemClickListener{

 @Override
 public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);
   // requestWindowFeature(Window.FEATURE_NO_TITLE);
    View view = inflater.inflate(R.layout.fragment_1, container, false);
    ListView listView = (ListView) view.findViewById(R.id.listView1);
    listView.setOnItemClickListener(this);


    return view;
}
@Override
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
    // TODO Auto-generated method stub
    Fragment Fragment3 = new Fragment_3();
    Integer fragmentId = (Integer) v.getTag();
    FragmentManager fragmentManager = getFragmentManager();
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
    fragmentTransaction.replace(fragmentId, Fragment3);
    fragmentTransaction.commit();

}

}

Answer 1

我怀疑v.getTag()是空的;所以Integer fragmentId = (Integer) v.getTag();最终会在fragmentId中为null。将其拆箱到int时，您将获得NullPointerException。为什么不用fragmentId中的fragmentTransaction.replace(fragmentId, Fragment3);替换包含当前Fragment_1实例的容器的id？

单击时从另一个片段调用片段

1 个答案: