Java Android - 如何从活动“启动”或“初始化”片段？
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Android - How do I "start" or "initialize" a Fragment from an activity?
提问by wiseindy
I have a class called DummyFragmentthat extends Fragment.
我有一个名为DummyFragmentextends的类Fragment。
public class DummyFragment extends Fragment {
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setRetainInstance(true);
Log.i("myapp","test");
}
}
Now, in my parent activity, I want to "run" this fragment.
现在，在我的父活动中，我想“运行”这个片段。
This is my FirstActivity.java:
这是我的FirstActivity.java：
public class FirstActivity {
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_first);
// How do I run/start my fragment? I want it's onCreate method to fire
Fragment fraggy = new DummyFragment();
}
}
How do I run/start my fragment? I want my DummyFragment's onCreatemethod to fire.
如何运行/启动我的片段？我希望 myDummyFragment的onCreate方法触发。
采纳答案by Blacklight
There's plenty of documentation! Everything you need is already here.
有很多文档！您需要的一切都在这里。
FragmentManager fragmentManager = getFragmentManager()
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
Fragment fraggy = new DummyFragment();
fragmentTransaction.add(R.id.fragment_container, fraggy);
fragmentTransaction.commit();
Of course, you'll need the container in you activity layout.
当然，您需要在活动布局中使用容器。
