日期时间选择器中的代码布局不会出现

Question

为什么在处理DateTime选择器时 不会移动到DateTime选择器找到的布局

这是现有Aldata Time On Baker的课程：

public class Popactivity extends DialogFragment implements View.OnClickListener {
    View view;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
        view = inflater.inflate(R.layout.pop, container, false);

        return view;
    }


    @Override
    public void onClick(View v) {

    }


    public void show(FragmentTransaction manager, Object o) {}
}

这是MainActivity类

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



 android.support.v4.app.FragmentTransaction manager =getSupportFragmentManager().beginTransaction();
        Popactivity ppp=new Popactivity();
        ppp.show(manager,null);

Answer 1

此方法不需要存在。

public void show(FragmentTransaction manager, Object o) {}

至少，您不应该覆盖/重载现有的show(FragmentTransaction transaction, String tag)方法。

如果删除它，则应该没有错误。

例如，这段代码编译得很好。

public class MainActivity extends android.support.v7.app.AppCompatActivity {

     public static class PopUpFragment extends android.support.v4.app.DialogFragment {

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

    @Override
    protected void onCreate(Bundle b) {
        super.onCreate(b);
        setContentView(R.layout.activity_main);

        PopUpFragment pop = new PopUpFragment();
        pop.show(getSupportFragmentManager(), null);

    }
}