如何在Android Studio中正確創建日期選擇器？

我按照這裏的說明：https://developer.android.com/guide/topics/ui/controls/pickers.html 如何在Android Studio中正確創建日期選擇器？

我向下滾動到「創建日期選擇器」，並複製粘貼在一個文件中的代碼名爲DatePickerFragment.java：

public static class DatePickerFragment extends DialogFragment 
          implements DatePickerDialog.OnDateSetListener { 

    @Override 
    public Dialog onCreateDialog(Bundle savedInstanceState) { 
     // Use the current date as the default date in the picker 
     final Calendar c = Calendar.getInstance(); 
     int year = c.get(Calendar.YEAR); 
     int month = c.get(Calendar.MONTH); 
     int day = c.get(Calendar.DAY_OF_MONTH); 

     // Create a new instance of DatePickerDialog and return it 
     return new DatePickerDialog(getActivity(), this, year, month, day); 
    } 

    public void onDateSet(DatePicker view, int year, int month, int day) { 
     // Do something with the date chosen by the user 
    } 
}

然後我在activity_front_page.xml創造了這個按鈕：

<Button 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="@string/pick_date" 
    android:onClick="showDatePickerDialog" />

並加入此代碼到DatePickerFramegent類：

public void showDatePickerDialog(View v) { 
    DialogFragment newFragment = new DatePickerFragment(); 
    newFragment.show(getSupportFragmentManager(), "datePicker"); 
}

但是這是說getSupportFrammentManager()沒有定義？

我是使用Android工作室和開發Andriod的新手。我想要的是日期選擇器（如果您訪問上面提供的鏈接，它的圖片會顯示在屏幕的頂部附近）。任何想法如何解決這個問題？

來源

2016-11-29 user2719875

你嘗試Android的自身datepickerdialog https://developer.android.com/reference/android/app/DatePickerDialog.html –

您是否在活動中擴展Activity類或AppCompatActivity類？ –

當你使用android.support.v4.app.DialogFragment，你應該通過展示（）android.support.v4.app.FragmentManager的一個實例可以使用getSupportFragmentManager查詢（）調用

來源

2016-11-29 05:47:24

嘗試下面的代碼，看看是否有幫助：

Activity activity = getActivity; 
DatePickerDialog datePickerDialog = new DatePickerDialog(activity, AlertDialog.THEME_HOLO_LIGHT, 
       new DatePickerDialog.OnDateSetListener() { 

        @Override 
        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { 

       }, year, mm, dd); 
     datePickerDialog.show();

來源

2016-11-29 05:54:34

你需要FragmentTransaction不getSupportFragmentManager()

public void showDatePickerDialog(View v) { 
FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); 

DialogFragment newFragment = new DatePickerFragment(); 
newFragment.show(ft, "datePicker"); 
}

來源

2016-11-29 06:13:49

如何在Android Studio中正確創建日期選擇器？

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