Android的 - 添加code到A片段 [英] Android - Add code to a fragment

问题描述

我是初学者编码为Android，我试图用两个片段做一个应用程序。不幸的是，当我添加code设置行动我的布局，它使我的应用程序崩溃，所以我不知道我应该把我的code的片段文件。如果我拿出功能的onCreate，应用程序不会崩溃，我的布局是好的。

下面是我的code。非常感谢你的回答。

 公共类FragmentOne扩展片段{    公共静态最后的字符串标记=FragmentOne;
    公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
            捆绑savedInstanceState）{
        视图V = View.inflate（getActivity（），R.layout.fragmentone，NULL）;        返回伏;
    }    公共无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        最终的EditText etData =（EditText上）getView（）findViewById（R.id.etData）。
    }
}
 

解决方案

首先我可以看到你的$ C所有$ c.First为一些失误 @ user1873880 提到的，的onCreate（）在 onCreateView总是被称为（），所以你应该考虑处理您的意见 onCreateView（）。第二个错误，我可以看到的是，你是不是创建查看，因为它的设计是对片段使用。在我看来，你的片断应该看的方式是这样的：

 公共类FragmentOne扩展片段{    私有静态最后弦乐TAG =FragmentOne;    公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，捆绑savedInstanceState）{
        super.onCreateView（充气器，容器，savedInstanceState）;        //创建一个使用LayoutInflater您的看法
        返回inflater.inflate（R.layout.fragmentone，集装箱，FALSE）;
    }    公共无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        //做你的变量initialisations这里除了查看！
    }    公共无效onViewCreated（查看视图，捆绑savedInstanceState）{
        super.onViewCreated（查看，savedInstanceState）;
        //初始化你的看法
        的EditText etData =（EditText上）view.findViewById（R.id.etData）;
    }
}
 

希望这可以帮助你！ ：）

I am a beginner in coding for Android and i am trying to do an application with two fragments. Unfortunately, when i add code to set action to my layout, it makes my application crash, so i'm wondering where i should put my code on the fragment file. If i take out the function onCreate, the application doesn't crash and my layout is good.

Here is my code. Thank you so much for your answer.

public class FragmentOne extends Fragment{

    public static final String TAG = "FragmentOne";


    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View v = View.inflate(getActivity(), R.layout.fragmentone, null);

        return v;
    }

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final EditText etData = (EditText) getView().findViewById(R.id.etData);


    }
}

解决方案

First of all I can see a few mistakes in your code.First of all as @user1873880 mentioned, onCreate() is always called before onCreateView(), so you should consider dealing with your views in onCreateView(). Second mistake which I can see is that you are not creating your View as it's designed to be used on Fragment. In my opinion the way your Fragment should look is like this :

public class FragmentOne extends Fragment {

    private static final String TAG = "FragmentOne";

    public View onCreateView(LayoutInflater inflater, ViewGroup container,  Bundle savedInstanceState) {
        super.onCreateView(inflater, container, savedInstanceState);

        // create your view using LayoutInflater 
        return inflater.inflate(R.layout.fragmentone, container, false);
    }

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // do your variables initialisations here except Views!!!
    }

    public void onViewCreated(View view, Bundle savedInstanceState){
        super.onViewCreated(view, savedInstanceState);
        // initialise your views
        EditText etData = (EditText) view.findViewById(R.id.etData);
    }
}

Hope this helps you! : )

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