show。（getFragmentManager）with Fragment not FragmentActivity

Question

我偶然發現了一個我需要幫助的問題。 我有一個選項卡布局與ViewPager在其中我定義了三個不同的選項卡。 FragmentTab1，FragmentTab2，FragmentTab3。 在我的FragmentTab3中，我想使用TimePicker。爲此，我定義了一個TimePickerFragment.java類;如下所示：

public class TimePickerFragment extends DialogFragment implements 
    TimePickerDialog.OnTimeSetListener { 

private TimePickedListener mListener; 

@Override 
public Dialog onCreateDialog(Bundle savedInstanceState) 
{ 
    // use the current time as the default values for the picker 
    final Calendar c = Calendar.getInstance(); 
    int hour = c.get(Calendar.HOUR_OF_DAY); 
    int minute = c.get(Calendar.MINUTE); 

    // create a new instance of TimePickerDialog and return it 
    return new TimePickerDialog(getActivity(), this, hour, minute, DateFormat.is24HourFormat(getActivity())); 
} 

@Override 
public void onAttach(Activity activity) 
{ 
    // when the fragment is initially shown (i.e. attached to the activity), cast the activity to the callback interface type 
    super.onAttach(activity); 
    try 
    { 
     mListener = (TimePickedListener) activity; 
    } 
    catch (ClassCastException e) 
    { 
     throw new ClassCastException(activity.toString() + " must implement " + TimePickedListener.class.getName()); 
    } 
} 

@Override 
public void onTimeSet(TimePicker view, int hourOfDay, int minute) 
{ 
    // when the time is selected, send it to the activity via its callback interface method 
    Calendar c = Calendar.getInstance(); 
    c.set(Calendar.HOUR_OF_DAY, hourOfDay); 
    c.set(Calendar.MINUTE, minute); 

    mListener.onTimePicked(c); 
} 

public static interface TimePickedListener 
{ 
    public void onTimePicked(Calendar time); 

    View onCreateView(LayoutInflater inflater, ViewGroup container, 
      Bundle savedInstanceState); 
} 
} 

Okey。所以在我的FragmentTab3.java文件我嘗試使用下面的代碼：

import java.util.Calendar; 

import android.app.DialogFragment; 
import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.text.format.DateFormat; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.ArrayAdapter; 
import android.widget.Button; 
import android.widget.GridView; 
import android.widget.TextView; 
import com.example.app.TimePickerFragment.TimePickedListener; 

public class FragmentTab3 extends Fragment implements TimePickedListener { 

private TextView mPickedTimeText; 
private Button mPickTimeButton; 

@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, 
     Bundle savedInstanceState) { 
    // Get the view from fragmenttab3.xml 
    View view = inflater.inflate(R.layout.fragmenttab3, container, false); 

    //Skapar en ListView och kopplar till listview i xml 
    GridView gridView = (GridView) view.findViewById(R.id.gridView1); 

    //Arrayen som listan kommer ta värden ifrån 
    String [] items = new String[]{"Me", "Testing", "Grid", "View"}; 
    ArrayAdapter<String> adapter = 
      new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, items); 

    gridView.setAdapter(adapter); 

    //Kopplar objekt-textView till det i xml 
    mPickedTimeText = (TextView) view.findViewById(R.id.text_picked_time); 

    //Kopplar objekt-knapp till det i xml 
    mPickTimeButton = (Button) view.findViewById(R.id.button_pick_time); 

    //Skapar en setonclicklistener som säger vad som ska hända när knappen trycks 
    mPickTimeButton.setOnClickListener(new OnClickListener() 
    { 
     @Override 
     public void onClick(View view) 
     { 
      DialogFragment picker = new TimePickerFragment();; 
      picker.show(getFragmentManager(), "timePicker"); 
     } 
    }); 

    return view; 
} 

@Override 
public void onSaveInstanceState(Bundle outState) { 
    super.onSaveInstanceState(outState); 
    setUserVisibleHint(true); 
} 

@Override 
public void onTimePicked(Calendar time) 
{ 
    // display the selected time in the TextView 
    mPickedTimeText.setText(DateFormat.format("h:mm a", time)); 
} 

}

所以我的問題是這樣的。在這段代碼片段中： picker.show（getFragmentManager（），「timePicker」）;

我得到的錯誤：方法秀（FragmentManager，字符串）在類型DialogFragment不適用於參數（FragmentManager，字符串「）

現在我知道，這可以通過，而不是延長FragmentActivity來解決，但我不想這樣，因爲我ViewPagerAdapter.java將無法返回fragmenttab3。這使我在一個有點捉住22位。

我該如何解決這個問題，而延長FragmentActivity ??

感謝您提供的所有幫助等。在圈子裏跑了幾個小時。

Answer 1

我花了很多時間尋找今天的答案。我不確定正確的措辭/術語如何描述發生了什麼，但放置getActivity（）。getFragmentManager（）將解決您的問題。