在片段中添加按钮？

Question

我试图在我的片段布局中添加一个按钮，但它说方法findViewByid无法解析。我在片段中的onCreateView方法中实现它。为什么它会给我这个错误？

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

public class extra extends Fragment {


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        Button myButton = (Button) findViewById(R.id.my_button);
        return inflater.inflate(R.layout.extra, container, false);

    }

}

Answer 1

您需要使用View。等，

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

    View rootView = inflater.inflate(R.layout.extra, container, false);
      // Inflate the layout for this fragment
    Button myButton = (Button) rootView.findViewById(R.id.my_button);

    return rootView;
}

Answer 2

使用我的代码

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.extra, container, false);
Button myButton = (Button)view.findViewById(R.id.my_button);
return view;
}

Answer 3

public class extra extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
  View v = LayoutInflater.from(getActivity()).inflate(
            R.layout.YOUR_LAYOUT, null);

    Button myButton = (Button) v.findViewById(R.id.my_button);
    return v;
}}

使用上面的代码

Answer 4

使用此代码：

 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
       View rootView = inflater.inflate(R.layout.extra, container, false);
        Button myButton = (Button) rootView.findViewById(R.id.my_button);
       return rootView;

    }