使用日期/时间选择器Android显示日期/时间
我正在尝试设置用户从棒棒糖日期/时间选择器中选择的日期/时间。我遇到的问题是将日期/时间设置为按钮文本没有问题。问题是它不会保存在它所在的字符串中。然后我想用这个字符串做一些我知道怎么做的事情 日期选择器类使用日期/时间选择器Android显示日期/时间,android,datepicker,datetimepicker,timepicker,Android,Datepicker,Datetimepicker,Timepicker,我正在尝试设置用户从棒棒糖日期/时间选择器中选择的日期/时间。我遇到的问题是将日期/时间设置为按钮文本没有问题。问题是它不会保存在它所在的字符串中。然后我想用这个字符串做一些我知道怎么做的事情 日期选择器类 public class DatePickerFragment extends DialogFragment implements DatePickerDialog.OnDateSetListener { @Override public Dialog
public 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) {
final Calendar c = Calendar.getInstance();
int mYear = c.get(Calendar.YEAR);
int mMonth = c.get(Calendar.MONTH);
int mDay = c.get(Calendar.DAY_OF_MONTH);
Date d = new Date(year, month, day);
SimpleDateFormat sdf = new SimpleDateFormat("EE, MMM dd, yyyy");
// String newDate = sdf.format(d);
Toast.makeText(getActivity(), mMonth, Toast.LENGTH_LONG).show();
Toast.makeText(getActivity(), mDay, Toast.LENGTH_LONG).show();
Toast.makeText(getActivity(), mYear, Toast.LENGTH_LONG).show();
}
}
public class Request extends Fragment {
public TextView mCurrentUser;
public Button Request_Button;
public Button RButton_Date;
public Button RButton_Time;
public String cug;
public String cu;
public String time;
public String date;
//Request newInstance()
public static Request newInstance() {
Request fragment = new Request();
return fragment;
}
//Needed empty Request Constructor
public Request() {
}
//Public onCreateView
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//Make a view
View rootview = inflater.inflate(R.layout.fragment_request, container, false);
//Where you would initialize your variables
RButton_Date =(Button)rootview.findViewById(R.id.Request_Button_Date);
RButton_Time =(Button)rootview.findViewById(R.id.Request_Button_Time);
Request_Button = (Button)rootview.findViewById(R.id.Request_Button_Request);
//Current User Logged In
this.mCurrentUser = (TextView)rootview.findViewById(R.id.Current_User_TV);
date = new SimpleDateFormat("EE, MMM dd, yyyy").format(new Date().getTime());
time = new SimpleDateFormat("h:mm a" ).format(new Date().getTime());
RButton_Time.setText(time);
RButton_Date.setText(date);
//Showing current user
final ParseUser mCurrentUser = ParseUser.getCurrentUser();
if(mCurrentUser == null){
String mCurUserNull = "No User Logged on";
this.mCurrentUser.setText(mCurUserNull);
}
else{
cu = mCurrentUser.get("FirstName").toString();
cug = String.format("Hi! %s do you need a technician today?", cu);
this.mCurrentUser.setText(cug);
}
//=================================================================
//Create Dialog
RButton_Date.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Do Stuff
DialogFragment picker = new DatePickerFragment();
picker.show(getFragmentManager(), "datePicker");
}
});
DatePickerDialog.OnDateSetListener dateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
}
};
RButton_Time.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DialogFragment picker1 = new TimePickerFragment();
picker1.show(getFragmentManager(), "timePicker");
}
});
Request_Button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Write Code for Gathering Variables and sending request email!!!
//Gather user info
//Populate email
//Send Username Request to Request@BitsNBytesStore.com
Toast.makeText(getActivity(), cu + " Requested a tech at "+time
+", on "+date, Toast.LENGTH_SHORT).show();
}
});
//return rootview
return rootview;
}
public 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) {
final Calendar c = Calendar.getInstance();
int mYear = c.get(Calendar.YEAR);
int mMonth = c.get(Calendar.MONTH);
int mDay = c.get(Calendar.DAY_OF_MONTH);
Date d = new Date(year, month, day);
SimpleDateFormat sdf = new SimpleDateFormat("EE, MMM dd, yyyy");
// String newDate = sdf.format(d);
Toast.makeText(getActivity(), mMonth, Toast.LENGTH_LONG).show();
Toast.makeText(getActivity(), mDay, Toast.LENGTH_LONG).show();
Toast.makeText(getActivity(), mYear, Toast.LENGTH_LONG).show();
}
}
public class Request extends Fragment {
public TextView mCurrentUser;
public Button Request_Button;
public Button RButton_Date;
public Button RButton_Time;
public String cug;
public String cu;
public String time;
public String date;
//Request newInstance()
public static Request newInstance() {
Request fragment = new Request();
return fragment;
}
//Needed empty Request Constructor
public Request() {
}
//Public onCreateView
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
//Make a view
View rootview = inflater.inflate(R.layout.fragment_request, container, false);
//Where you would initialize your variables
RButton_Date =(Button)rootview.findViewById(R.id.Request_Button_Date);
RButton_Time =(Button)rootview.findViewById(R.id.Request_Button_Time);
Request_Button = (Button)rootview.findViewById(R.id.Request_Button_Request);
//Current User Logged In
this.mCurrentUser = (TextView)rootview.findViewById(R.id.Current_User_TV);
date = new SimpleDateFormat("EE, MMM dd, yyyy").format(new Date().getTime());
time = new SimpleDateFormat("h:mm a" ).format(new Date().getTime());
RButton_Time.setText(time);
RButton_Date.setText(date);
//Showing current user
final ParseUser mCurrentUser = ParseUser.getCurrentUser();
if(mCurrentUser == null){
String mCurUserNull = "No User Logged on";
this.mCurrentUser.setText(mCurUserNull);
}
else{
cu = mCurrentUser.get("FirstName").toString();
cug = String.format("Hi! %s do you need a technician today?", cu);
this.mCurrentUser.setText(cug);
}
//=================================================================
//Create Dialog
RButton_Date.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Do Stuff
DialogFragment picker = new DatePickerFragment();
picker.show(getFragmentManager(), "datePicker");
}
});
DatePickerDialog.OnDateSetListener dateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
}
};
RButton_Time.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
DialogFragment picker1 = new TimePickerFragment();
picker1.show(getFragmentManager(), "timePicker");
}
});
Request_Button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//Write Code for Gathering Variables and sending request email!!!
//Gather user info
//Populate email
//Send Username Request to Request@BitsNBytesStore.com
Toast.makeText(getActivity(), cu + " Requested a tech at "+time
+", on "+date, Toast.LENGTH_SHORT).show();
}
});
//return rootview
return rootview;
}
public void onDateSet(DatePicker view, int year, int month, int day) {
Button DateButton = (Button) getActivity().getWindow().getDecorView().getRootView().findViewById(R.id.Request_Button_Date);
String stringDueDateFrag = (month+1) + "/" + day + "/" + year + " ";
DateButton.setText(stringDueDateFrag);
// Set up a Calendar object to capture the user selected date in case the user wants
// edit the date later. Put the user selected date in a Bundle for onCreateDialog function to use.
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Button TimeButton = (Button) getActivity().getWindow().getDecorView().getRootView().findViewById(R.id.Request_Button_Date);
String stringDueDateFrag = hourOfDay + ":" + minute;
TimeButton.setText(stringDueDateFrag);
}
public void onDateSet(DatePicker view, int year, int month, int day) {
Button DateButton = (Button) getActivity().getWindow().getDecorView().getRootView().findViewById(R.id.Request_Button_Date);
String stringDueDateFrag = (month+1) + "/" + day + "/" + year + " ";
DateButton.setText(stringDueDateFrag);
// Set up a Calendar object to capture the user selected date in case the user wants
// edit the date later. Put the user selected date in a Bundle for onCreateDialog function to use.
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Button TimeButton = (Button) getActivity().getWindow().getDecorView().getRootView().findViewById(R.id.Request_Button_Date);
String stringDueDateFrag = hourOfDay + ":" + minute;
TimeButton.setText(stringDueDateFrag);
}
public void onDateSet(DatePicker view, int year, int month, int day) {
Button DateButton = (Button) getActivity().getWindow().getDecorView().getRootView().findViewById(R.id.Request_Button_Date);
String stringDueDateFrag = (month+1) + "/" + day + "/" + year + " ";
DateButton.setText(stringDueDateFrag);
// Set up a Calendar object to capture the user selected date in case the user wants
// edit the date later. Put the user selected date in a Bundle for onCreateDialog function to use.
}
public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
Button TimeButton = (Button) getActivity().getWindow().getDecorView().getRootView().findViewById(R.id.Request_Button_Date);
String stringDueDateFrag = hourOfDay + ":" + minute;
TimeButton.setText(stringDueDateFrag);
}
11-08 15:07:39.229 4922-4966/com.megliosolutions.bitsnbytes W/EGL_emulation: eglSurfaceAttrib not implemented
11-08 15:07:39.229 4922-4966/com.megliosolutions.bitsnbytes W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xa5486920, error=EGL_SUCCESS
11-08 15:07:59.658 4922-4929/com.megliosolutions.bitsnbytes W/art: Suspending all threads took: 15.332ms
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: FATAL EXCEPTION: main
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: Process: com.megliosolutions.bitsnbytes, PID: 4922
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources$Theme android.content.Context.getTheme()' on a null object reference
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.app.DatePickerDialog.resolveDialogTheme(DatePickerDialog.java:88)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.app.DatePickerDialog.<init>(DatePickerDialog.java:105)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.app.DatePickerDialog.<init>(DatePickerDialog.java:82)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at com.megliosolutions.bitsnbytes.Adapters.DatePickerFragment.onCreateDialog(DatePickerFragment.java:40)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.support.v4.app.DialogFragment.getLayoutInflater(DialogFragment.java:308)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:955)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1138)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:740)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1501)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:458)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.os.Handler.handleCallback(Handler.java:739)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:95)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.os.Looper.loop(Looper.java:135)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5257)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:372)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
11-08 15:08:06.175 4922-4929/com.megliosolutions.bitsnbytes W/art: Suspending all threads took: 5.023ms
11-08 15:07:39.229 4922-4966/com.megliosolutions.bitsnbytes W/EGL_仿真：未实现eglSurfaceAttrib
11-08 15:07:39.229 4922-4966/com.megliosolutions.bitsnbytes W/OpenGLRenderer:未能在表面0xa5486920上设置EGL_交换_行为，错误=EGL_成功
11-08 15:07:59.658 4922-4929/com.megliosolutions.bitsnbytes W/art:挂起所有线程花费的时间：15.332ms
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:致命异常：main
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:Process:com.megliosolutions.bitsnbytes，PID:4922
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:java.lang.NullPointerException:尝试在空对象引用上调用虚拟方法“android.content.res.Resources$Theme android.content.Context.getTheme（）”
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.app.DatePickerDialog.resolvedialog主题（DatePickerDialog.java:88）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.app.DatePickerDialog.（DatePickerDialog.java:105）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.app.DatePickerDialog.（DatePickerDialog.java:82）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at com.megliosolutions.bitsnbytes.Adapters.DatePickerFragment.onCreateDialog（DatePickerFragment.java:40）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.support.v4.app.DialogFragment.getLayoutInflater（DialogFragment.java:308）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at android.support.v4.app.FragmentManagerImpl.moveToState（FragmentManager.java:955）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at android.support.v4.app.FragmentManagerImpl.moveToState（FragmentManager.java:1138）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.support.v4.app.BackStackRecord.run（BackStackRecord.java:740）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at android.support.v4.app.FragmentManagerImpl.execPendingActions（FragmentManager.java:1501）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at android.support.v4.app.FragmentManagerImpl$1.run（FragmentManager.java:458）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.os.handle.handleCallback（Handler.java:739）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.os.Handler.dispatchMessage（Handler.java:95）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.os.Looper.loop（Looper.java:135）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at-android.app.ActivityThread.main（ActivityThread.java:5257）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at java.lang.reflect.Method.invoke（本机方法）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at java.lang.reflect.Method.invoke（Method.java:372）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run（ZygoteInit.java:903）
11-08 15:08:04.618 4922-4922/com.megliosolutions.bitsnbytes E/AndroidRuntime:at com.android.internal.os.ZygoteInit.main（ZygoteInit.java:698）
11-08 15:08:06.175 4922-4929/com.megliosolutions.bitsnbytes W/art:暂停所有线程所用时间：5.023ms
targetFragment请求请求请求传递的目标片段
这里有一个非常好的资源
现在在您的请求
片段中，调用
工作解决方案
我已经想出了如何让它完美地工作
您需要确保为时间/日期选择器创建一个单独的类。但是，不要使用“implements OnDateSetListener”，只需保持类的原样或删除它，并在要使用它的活动/片段中实现OnDateSetListener
您可以通过以下方式将两者结合起来：
implements OnDateSetListener, OnTimeSetListener...
这将允许使用这两种方法，但必须实现所需的方法。那你该走了
确保正确初始化所有内容，并以编程方式将所有内容放置在需要的位置 你可以试试这个，它对我有用
public class DatePickerFragment extends DialogFragment {
private static final String ARG_DATE = "date";
public static final String EXTRA_DATE =
"com.bignerdranch.android.criminalintent.date";
private DatePicker mDatePicker;
@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
Date date = (Date)getArguments().getSerializable(ARG_DATE);
Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int year = calendar.get(Calendar.YEAR);
int month = calendar.get(Calendar.MONTH);
int day = calendar.get(Calendar.DAY_OF_MONTH);
View view = LayoutInflater.from(getActivity()).inflate(R.layout.dialog_date,null);
mDatePicker = (DatePicker)view.findViewById(R.id.dialog_date_date_picker);
mDatePicker.init(year,month,day,null);
return new AlertDialog.Builder(getActivity())
.setView(view)
.setTitle(R.string.date_picker_title)
.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
int year = mDatePicker.getYear();
int month = mDatePicker.getMonth();
int day = mDatePicker.getDayOfMonth();
Date date = new GregorianCalendar(year, month, day).getTime();
sendResult(Activity.RESULT_OK, date);
}
})
.create();
}
public static DatePickerFragment newInstance(Date date){
Bundle args = new Bundle();
args.putSerializable(ARG_DATE,date);
DatePickerFragment fragment = new DatePickerFragment();
fragment.setArguments(args);
return fragment;
}
private void sendResult(int resultCode,Date date){
if (getTargetFragment() == null){
return;
}
Intent intent = new Intent();
intent.putExtra(EXTRA_DATE,date);
getTargetFragment().onActivityResult(getTargetRequestCode(),resultCode,intent);
}
}
为了召唤碎片
mDateButton = (Button) view.findViewById(R.id.crime_date);
updateDate((mCrime.getDate()).toString());
/*mDateButton.setEnabled(false);*/
/* Design a date picker for an application */
mDateButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
FragmentManager fragmentManager = getFragmentManager();
/*DatePickerFragment dialog = new DatePickerFragment();*/
DatePickerFragment dialog = DatePickerFragment.newInstance(mCrime.getDate());
dialog.setTargetFragment(CrimeFragment.this, REQUEST_DATE);
dialog.show(fragmentManager, DIALOG_DATE);
}
});
显示日期选择器的活动是否扩展了FragmentActivity