无法实例化活动组件信息（片段）-Android

我想点击按钮打开另一个片段，但是我遇到了以下问题。我需要做什么才能切换到新片段

java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{...yeniKayıtFragment}: java.lang.ClassCastException: ...yeniKayıtFragment cannot be cast to android.app.Activity

冷杉片段

  public class GirisFragmentNew extends Fragment implements View.OnClickListener{

 btnKAyit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i=new Intent(getActivity(), yeniKayıtFragment.class);
                startActivity(i);
            }
        });
}

public class yeniKayıtFragment extends  Fragment {
    private yeniKayıtModel yeniKayıtModel;
   public View onCreateView(@NonNull LayoutInflater inflater,
                             ViewGroup container, Bundle savedInstanceState) {
        yeniKayıtModel =
                ViewModelProviders.of(this).get(yeniKayıtModel.class);

        View root = inflater.inflate(R.layout.fragment_yenikayit, container, false);
        Window window=getActivity().getWindow();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            window.setNavigationBarColor(getResources().getColor(R.color.colorPrimary));}
  return root;
    }

第二个片段

  public class GirisFragmentNew extends Fragment implements View.OnClickListener{

 btnKAyit.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent i=new Intent(getActivity(), yeniKayıtFragment.class);
                startActivity(i);
            }
        });
}

public class yeniKayıtFragment extends  Fragment {
    private yeniKayıtModel yeniKayıtModel;
   public View onCreateView(@NonNull LayoutInflater inflater,
                             ViewGroup container, Bundle savedInstanceState) {
        yeniKayıtModel =
                ViewModelProviders.of(this).get(yeniKayıtModel.class);

        View root = inflater.inflate(R.layout.fragment_yenikayit, container, false);
        Window window=getActivity().getWindow();
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            window.setNavigationBarColor(getResources().getColor(R.color.colorPrimary));}
  return root;
    }

视图模型

package ...yeniKayit;

import androidx.lifecycle.ViewModel;

public class yeniKayıtModel extends ViewModel {
}

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使用片段管理器，而不是意图。有关更多信息，请查看此链接

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不要试图将片段作为活动打开，因为它是一个片段，而不是一个ActivityStart活动，顾名思义，它用于启动活动而不是片段，希望能有所帮助