Question

有谁能告诉我，为什么会出现这个错误（甚至有更好的解决方案）？我是Java（和Android）开发的新手，所以我真的不知道我的错我的代码：

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;


public class select_type extends Fragment {


    public select_type() {
        // Required empty public constructor
    }

    @Override //<--- Cause the ERROR
    public View onCreateView(View view, LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        return inflater.inflate(R.layout.fragment_select_type, container, false);

        Button btn = (Button) view.findViewById(R.id.btn);

        btn.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {

                noVIP TextFragment = new noVIP();
                FragmentTransaction transaction = getFragmentManager().beginTransaction();
                transaction.replace(R.id.fragment_container, TextFragment);
                transaction.addToBackStack(null);
                transaction.commit();
            }
        });

        return view;
    }

}

Answer 1

替换：

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

使用：

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

为onCreateView() is not passed a View parameter。

另外，摆脱super.onViewCreated(view, savedInstanceState);。在你所在的地方打电话既不必要也不恰当。

请注意，由于您首先返回，因此该方法中return语句之后的所有内容都不会被执行。将inflater.inflate(...)结果分配给局部变量，使用它，然后在方法结束时返回该变量。

Answer 2

您也可以覆盖两种方法：

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(R.layout.fragment_select_type, container, false);
}




@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

   Button btn = (Button) view.findViewById(R.id.btn);

    btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {

            noVIP TextFragment = new noVIP();
            FragmentTransaction transaction = getFragmentManager().beginTransaction();
            transaction.replace(R.id.fragment_container, TextFragment);
            transaction.addToBackStack(null);
            transaction.commit();
        }
    }); 

  }

方法不会覆盖其超类的方法

2 个答案: