无法解析方法“ show（android.support.v4.app.FragmentManager，java.lang.String）”

Question

在TimePickerDailog中给我类似无法解决方法的错误'show（android.support.v4.app.FragmentManager，java.lang.String）'

我从我尝试过的另一个网站获得了本教程，但没有得到输出并得到相同的错误。我在stackoverflow中引用了相同的问题，但没有得到结果，所以我发布了问题。

在这一行给我错误：-

    dFragment.show(getFragmentManager(),"Time Picker");

这里的代码：-

  public class Daily_Task extends Fragment {
    public Daily_Task() {};
    Button submittask;
    View view;

    EditText starttime, endtime;
    EditText Taskname, Detail;
    @Override
    public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_daily__task, container, false);
        getActivity().setTitle("Task");
        starttime = (EditText) view.findViewById(R.id.start_time);
        endtime = (EditText) view.findViewById(R.id.End_time);
        submittask = (Button) view.findViewById(R.id.add_task_button);

        starttime.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // Initialize a new time picker dialog fragment
                DialogFragment dFragment = new TimePickerFragment();

                // Show the time picker dialog fragment
                dFragment.show(getFragmentManager(),"Time Picker");

            }
        });

        return view;
    }

TimePickerFragment.java

  package com.Weal.sachin.omcom;

/**
 * Created by sachin on 2/1/2017.
 */

import android.app.AlertDialog;
import android.app.TimePickerDialog;
import android.os.Bundle;
import android.widget.TextView;
import android.app.DialogFragment;
import android.app.Dialog;
import java.util.Calendar;
import android.widget.TimePicker;

public class TimePickerFragment extends DialogFragment implements TimePickerDialog.OnTimeSetListener{

    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState){
        // Get a Calendar instance
        final Calendar calendar = Calendar.getInstance();
        // Get the current hour and minute
        int hour = calendar.get(Calendar.HOUR_OF_DAY);
        int minute = calendar.get(Calendar.MINUTE);

        /*
            Creates a new time picker dialog with the specified theme.

                TimePickerDialog(Context context, int themeResId,
                    TimePickerDialog.OnTimeSetListener listener,
                    int hourOfDay, int minute, boolean is24HourView)
         */

        // TimePickerDialog Theme : THEME_DEVICE_DEFAULT_LIGHT
        TimePickerDialog tpd = new TimePickerDialog(getActivity(),
                AlertDialog.THEME_DEVICE_DEFAULT_LIGHT,this,hour,minute,false);

        // TimePickerDialog Theme : THEME_DEVICE_DEFAULT_DARK
        TimePickerDialog tpd2 = new TimePickerDialog(getActivity(),
                AlertDialog.THEME_DEVICE_DEFAULT_DARK,this,hour,minute,false);

        // TimePickerDialog Theme : THEME_HOLO_DARK
        TimePickerDialog tpd3 = new TimePickerDialog(getActivity(),
                AlertDialog.THEME_HOLO_DARK,this,hour,minute,false);

        // TimePickerDialog Theme : THEME_HOLO_LIGHT
        TimePickerDialog tpd4 = new TimePickerDialog(getActivity(),
                AlertDialog.THEME_HOLO_LIGHT,this,hour,minute,false);

        // TimePickerDialog Theme : THEME_TRADITIONAL
        TimePickerDialog tpd5 = new TimePickerDialog(getActivity(),
                AlertDialog.THEME_TRADITIONAL,this,hour,minute,false);

        // Return the TimePickerDialog
        return tpd;
    }

    public void onTimeSet(TimePicker view, int hourOfDay, int minute){
        // Do something with the returned time
        TextView tv = (TextView) getActivity().findViewById(R.id.start_time);
        tv.setText("HH:MM\n" + hourOfDay + ":" + minute);
    }
}

Answer 1

这样尝试

对于 android.support.v4.app.DialogFragment

dFragment.show(getActivity().getSupportFragmentManager(),"Time Picker");

对于 android.app.DialogFragment

dFragment.show(getActivity().getFragmentManager(),"Time Picker");

并且保留该片段的活动应该扩展 AppCombatActivity