Android 如何在片段中初始化文本视图

这给了我一个错误：

尝试在空对象引用上调用虚拟方法“android.view.view android.view.view.findViewById（int）”

试试下面的解决方案

public class Device extends Fragment {
TextView textv;

    public Device() {

        // Required empty public constructor
    }


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        textv = this.getView().findViewById(R.id.tv1);
        textv.setText(Build.PRODUCT);


        return inflater.inflate(R.layout.fragment_device, container, false);

    }


}

我希望这能帮助你

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谢谢大家!

通过覆盖

onViewCreated

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_device, container, false);
    textv = view.findViewById(R.id.tv1);
    textv.setText(Build.PRODUCT);
    return view;
}

---

您可以在片段onCreateView（）方法中这样做

---

尝试执行getActivity（）.findViewById（）而不是此.getView（）.findViewById（）您好！，请检查此处，这是否回答了您的问题E:\Android\u Project\Whatsapp\app\build\intermediates\signing\u config\debug\out\signing-config.json（访问被拒绝）

    @Override
    public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        textv = view.findViewById(R.id.tv1);
        textv.setText(Build.PRODUCT);

    }

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

public void initViews(){
      textv = rootView.findViewById(R.id.tv1);
      textv.setText(Build.PRODUCT);
}