当在kitkat上设置minDate或maxDate时，Android DatePicker崩溃
你好我有一个日期选择器对话框，当用户点击一个EditText时弹出。 它在另一个设备上工作，我尝试过运行Android 6.0，但是当我尝试运行kitkat的表上的同一个应用程序时，它崩溃了。
我可以确认它是setMinDate或setMaxDate代码，因为我把它拿出来，并且在我做完之后页面没有崩溃。
这是日志：
E / AndroidRuntime：致命例外：主
进程：com.xxxxxx.pointofsale，PID：13402 android.widget.CalendarView.onScroll（CalendarView.java:1216）上的java.lang.NullPointerException在android.widget.CalendarView.access $ 900（CalendarView.java:76）。 widget.CalendarView $ 2.onScroll（CalendarView.java:1077）在android.widget.AbsListView.invokeOnItemScrollListener（AbsListView.java:1463）在android.widget.ListView.layoutChildren（ListView.java:1745）在android.widget.AbsListView。 onLayout（AbsListView.java:2149）at android.view.View.layout（View.java:15125）at android.view.ViewGroup.layout（ViewGroup.java:4862）at android.widget.LinearLayout.setChildFrame（LinearLayout.java） ：1888）at android.widget.LinearLayout.layoutVertical（LinearLayout.java:1742）at android.widget.LinearLayout.onLayout（LinearLayout.java:1651）at android.view.View.layout（View.java:15125）at android .view.ViewGroup.layout（ViewGroup.java:4862）at android.widget.FrameLayout.layoutChildren（FrameLayout.java:515）at android.widget.FrameLayout.onLayout（FrameLayout.java:450） ）在android.widget上的android.widget.LinearLayout.setChildFrame（LinearLayout.java:1888）上的android.view.ViewGroup.layout（ViewGroup.java:4862）上的android.view.View.layout（View.java:15125） .LinearLayout.layoutHorizontal（LinearLayout.java:1877）at android.widget.LinearLayout.onLayout（LinearLayout.java:1653）at android.view.View.layout（View.java:15125）at android.view.ViewGroup.layout（） ViewGroup.java:4862）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:515）在android.widget.FrameLayout.onLayout（FrameLayout.java:450）在android.view.View.layout（View.java:15125 ）在android.view.ViewGroup.layout（ViewGroup.java:4862）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:515）在android.widget.FrameLayout.onLayout（FrameLayout.java:450）在android.view .View.layout（View.java:15125）在android.widget.FrameLayout.layoutChildren（FrameLayout.java:515）在android.widget.FrameLayout.onLayout（android.view.ViewGroup.layout（ViewGroup.java:4862） FrameLayout.java:450）在android.vi ew.View.layout（View.java:15125）在android.view.ViewGroup.layout（ViewGroup.java:4862）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1888）在android.widget.LinearLayout.layoutVertical （LinearLayout.java:1742）在android.view.View.config.ViewGroup.layout（ViewGroup.java：android.view.View.layout（View.java:15125））android.widget.LinearLayout.onLayout（LinearLayout.java:1651） 4862）在android.android.widget.FrameLayout.layoutChildren（FrameLayout.java:515）android.widget.FrameLayout.onLayout（FrameLayout.java:450）在android.view.View.layout（View.java:15125）在android。 view.ViewGroup.layout（ViewGroup.java:4862）在android.widget.LinearLayout.setChildFrame（LinearLayout.java:1888）在android.widget.LinearLayout.layoutVertical（LinearLayout.java:1742）在android.widget.LinearLayout.onLayout （LinearLayout.java:1651）at android.view.View.layout（View.java:15125）at android.view.ViewGroup.layout（ViewGroup.java:4862）at android.widget.FrameLayout.layoutChildren（FrameLayout.java： 515）在android.widge t.FrameLayout.onLayout（FrameLayout.java:450）at android.view.View.layout（View.java:15125）at android.view.ViewGroup.layout（ViewGroup.java:4862）at android.view.ViewRootImpl.performLayout （ViewRootImpl.java:2323）在android.view.ViewRootImpl.performTraversals（ViewRootImpl.java:2029）在android.view.ViewRootImpl.doTraversal（ViewRootImpl.java:1192）在android.view.ViewRootImpl $ TraversalRunnable.run（ViewRootImpl。 java：6231）在android.view.Choreographer $ CallbackRecord.run（Choreographer.java:788）在android.view.Choreographer.doCallbacks（Choreographer.java:591）在android.view.Choreographer.doFrame（Choreographer.java:560） ）at android.view.Choreographer $ FrameDisplayEventReceiver.run（Choreographer.java:774）at android.os.Handler.handleCallback（Handler.java:808）at android.os.Handler.dispatchMessage（Handler.java:103）at android .os.Looper.loop（Looper.java:193）at android.app.ActivityThread.main（ActivityThread.java:5292）at java.lang.reflect.Method.invokeNative（Nativ
这是我的代码：
final DatePickerDialog.OnDateSetListener mDateSetListener = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
mCalendar.set(Calendar.YEAR, year);
mCalendar.set(Calendar.MONTH, monthOfYear);
mCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
String myFormat = "yyyy-MM-dd"; //In which you need put here
SimpleDateFormat sdf = new SimpleDateFormat(myFormat, Locale.US);
mSelectedDate = sdf.format(mCalendar.getTime());
etDate.setText(Utils.formatDate(mSelectedDate, "yyyy-MM-dd", "EEEE, d MMMM yyyy"));
getTravelSchedules();
}
};
private final View.OnClickListener mDateViewOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
if (etDate.getText().toString().equals("")) {
Toast.makeText(getApplicationContext(), "Please select a destination first!", Toast.LENGTH_LONG).show();
return;
}
Date today = new Date();
Calendar c = Calendar.getInstance();
c.setTime(today);
c.add(Calendar.DATE, +7);
final long maxDate = c.getTime().getTime();
c.setTime(today);
final long minDate = c.getTime().getTime();
DatePickerDialog datePickerDialog = new DatePickerDialog(mContext, R.style.DialogTheme, mDateSetListener, mCalendar
.get(Calendar.YEAR), mCalendar.get(Calendar.MONTH),
mCalendar.get(Calendar.DAY_OF_MONTH));
datePickerDialog.getDatePicker().setMinDate(minDate);
datePickerDialog.getDatePicker().setMaxDate(maxDate);
datePickerDialog.show();
}
};
你也可以使用这个功能
void showDatePickerDialog(final EditText et) {
DatePickerDialog.OnDateSetListener date = new DatePickerDialog.OnDateSetListener() {
@Override
public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
// TODO Auto-generated method stub
Calendar myCalendar = Calendar.getInstance();
myCalendar.set(Calendar.YEAR, year);
myCalendar.set(Calendar.MONTH, monthOfYear);
myCalendar.set(Calendar.DAY_OF_MONTH, dayOfMonth);
et.setText(new SimpleDateFormat("dd MMM, yyyy", Locale.getDefault()).format(myCalendar.getTime()));
}
};
// Calendar Minimum Range
Calendar calendarMinDate = Calendar.getInstance();
calendarMinDate.add(Calendar.DATE, 0);
// Calendar Maximum Range
Calendar calendarMaxDate = Calendar.getInstance();
calendarMaxDate.add(Calendar.DATE, +7);
DatePickerDialog datePickerDialog = new DatePickerDialog(getActivity(),
R.style.MyDatePickerDialogTheme, date, calYear, calMonth, calDay);
datePickerDialog.getDatePicker().setMinDate(calendarMinDate.getTimeInMillis());
datePickerDialog.getDatePicker().setMaxDate(calendarMaxDate.getTimeInMillis());
datePickerDialog.show();
}
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