<pre name="code" class="java">public static class PlaceholderFragment extends Fragment
fragment模块，在该模块的基础上进行嵌套fragment代码如下：
<pre name="code" class="java">public static class PlaceholderFragment extends Fragment {
static FragmentManager fm;
public PlaceholderFragment() {
fm=getChildFragmentManager();
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView=LayoutInflater.from(getActivity())
.inflate(R.layout.tab, null);
if(fm.findFragmentByTag("haha")==null)
{
Fragment1 f1=new Fragment1();
fm.beginTransaction().add(R.id.frame_tab,f1,"haha").commit();
}
return rootView;
}
结果报错如下：
总之就是说Acitivity被被销毁了。
原因：
fm=getChildFragmentManager();在 <span style="font-family: Arial, Helvetica, sans-serif;">PlaceholderFragment 的构造函数中调用，此时它还没有创建onCreate，自然获取不到Fragment及activity了，因此将其写入</span>
<span style="font-family: Arial, Helvetica, sans-serif;"></span><pre name="code" class="java"><pre name="code" class="java">public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
fm=getChildFragmentManager();
}
错误解决,大家一定要对Fragment及activity生命周期注意啊。