Android 日历活动NullPointerException设置minDate和maxDate
当我在Android 日历活动NullPointerException设置minDate和maxDate,android,nullpointerexception,calendar,maxdate,mindate,Android,Nullpointerexception,Calendar,Maxdate,Mindate,当我在CalendarActivity的onCreate中设置minDate和maxDate时,我得到一个NullPointerException。 我在拼命寻找解决办法 当我注释minDate和maxDate行时,没有问题 我使用日期范围调用日历(通过http POST使用异步任务执行),当我更改并增加该范围时,有时也没有问题 我的日志: 06-17 12:32:39.636 21968-21968/com.example.lissar W/EGL_genymotion﹕ eglSurfac
CalendarActivity
的onCreate
中设置minDate
和maxDate
时,我得到一个NullPointerException
。
我在拼命寻找解决办法
当我注释minDate
和maxDate
行时,没有问题
我使用日期范围调用日历(通过http POST使用异步任务执行),当我更改并增加该范围时,有时也没有问题
我的日志:
06-17 12:32:39.636 21968-21968/com.example.lissar W/EGL_genymotion﹕ eglSurfaceAttrib not implemented
06-17 12:32:39.660 21968-21968/com.example.lissar W/EGL_genymotion﹕ eglSurfaceAttrib not implemented
06-17 12:32:39.664 21968-21968/com.example.lissar D/AndroidRuntime﹕ Shutting down VM
06-17 12:32:39.664 21968-21968/com.example.lissar W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0xa4c00648)
06-17 12:32:39.676 21968-21968/com.example.lissar E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.NullPointerException
at android.widget.CalendarView.onScroll(CalendarView.java:1214)
at android.widget.CalendarView.access$900(CalendarView.java:76)
at android.widget.CalendarView$2.onScroll(CalendarView.java:1075)
at android.widget.AbsListView.invokeOnItemScrollListener(AbsListView.java:1340)
at android.widget.ListView.layoutChildren(ListView.java:1762)
at android.widget.AbsListView.onLayout(AbsListView.java:2012)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1525)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1434)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1671)
at android.widget.LinearLayout.layoutHorizontal(LinearLayout.java:1660)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1436)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at com.android.internal.widget.ActionBarOverlayLayout.onLayout(ActionBarOverlayLayout.java:349)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at android.widget.FrameLayout.onLayout(FrameLayout.java:448)
at android.view.View.layout(View.java:14289)
at android.view.ViewGroup.layout(ViewGroup.java:4562)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:1976)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1730)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
at android.view.Choreographer.doCallbacks(Choreographer.java:562)
at android.view.Choreographer.doFrame(Choreographer.java:532)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
at android.os.Handler.handleCallback(Handler.java:730)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:525)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
at dalvik.system.NativeStart.main(Native Method)
我将代码粘贴到minDate
和maxDate
方法所在的位置。在创建的onCreate
末尾:
calendarView = (CalendarView) findViewById(R.id.calendarView1);
calendarView.setOnDateChangeListener(new CalendarView.OnDateChangeListener() {
@Override
public void onSelectedDayChange(CalendarView view, int year, int month, int dayOfMonth) {
String yearFormat = "", monthFormat = "", dayFormat = "";
// El mes empieza en 0, así que aumentamos en uno para que cada mes coincida
// con su número correspondiente: enero -> 1, febrero -> 2, etc...
month += 1;
if (month < 10) {
monthFormat = String.format("%02d", month);
} else {
monthFormat = Integer.toString(month);
}
if (dayOfMonth < 10) {
dayFormat = String.format("%02d", dayOfMonth);
} else {
dayFormat = Integer.toString(dayOfMonth);
}
yearFormat = Integer.toString(year);
// Calculamos el día de la semana para mostrarlo en el Dialog
Calendar selected = Calendar.getInstance();
selected.setTimeInMillis(view.getDate());
int dayOfWeek = selected.get(Calendar.DAY_OF_WEEK);
HoursDialog hoursDialog = new HoursDialog(CalendarActivity.this,
yearFormat, monthFormat, dayFormat, dayOfWeek);
hoursDialog.show();
}
});
GregorianCalendar cal = new GregorianCalendar();
GregorianCalendar cal2 = new GregorianCalendar(); // Hoy
int daysBefore = daysEnabled * -1;
cal.add(GregorianCalendar.DATE, daysBefore);
calendarView.setMinDate(cal.getTime().getTime());
calendarView.setMaxDate(cal2.getTime().getTime());
calendarView=(calendarView)findViewById(R.id.calendarView1);
calendarView.setOnDateChangeListener(新的calendarView.OnDateChangeListener(){
@凌驾
选定日期更改时的公共无效(日历视图视图、整数年、整数月、整数天月){
字符串yearFormat=“”,monthFormat=“”,dayFormat=“”;
//这是一个0年的计划,也是一个新的计划
//con suúmero对应:enero->1,febrero->2,等等。。。
月份+=1;
如果(月<10){
monthFormat=String.format(“%02d”,月);
}否则{
monthFormat=Integer.toString(月);
}
如果(月日<10){
dayFormat=String.format(“%02d”,dayOfMonth);
}否则{
dayFormat=Integer.toString(dayOfMonth);
}
yearFormat=Integer.toString(年);
//对话中的计算
所选日历=Calendar.getInstance();
selected.setTimeInMillis(view.getDate());
int dayOfWeek=selected.get(Calendar.DAY\u OF周);
HoursDialog HoursDialog=新建HoursDialog(CalendarActivity.this,
yearFormat、monthFormat、dayFormat、dayOfWeek);
hoursDialog.show();
}
});
GregorianCalendar cal=新的GregorianCalendar();
GregorianCalendar cal2=新的GregorianCalendar();//霍伊
int daysBefore=daysEnabled*-1;
cal.add(GregoriaCalendar.DATE,日前);
calendarView.setMinDate(cal.getTime().getTime());
calendarView.setMaxDate(cal2.getTime().getTime());
如何解决这个错误?我自己回答
日历活动有一些bug。我终于使用了Caldroid:为什么要调用
.getTime()
两次?(cal.getTime().getTime()
)因为从第一个getTime()开始我就得到了一个日期,然后我必须再做一次getTime()以毫秒为单位获得时间。另一种方法是执行getTimeInMillis(),等于getTime().getTime()。谢谢你的编辑,提高了我的英语水平;)为什么要调用.getTime()
两次?(cal.getTime().getTime()
)因为从第一个getTime()开始我就得到了一个日期,然后我必须再做一次getTime()以毫秒为单位获得时间。另一种方法是执行getTimeInMillis(),等于getTime().getTime()。谢谢你的编辑,提高了我的英语水平;)为什么要调用.getTime()
两次?(cal.getTime().getTime()
)因为从第一个getTime()开始我就得到了一个日期,然后我必须再做一次getTime()以毫秒为单位获得时间。另一种方法是执行getTimeInMillis(),等于getTime().getTime()。谢谢你的编辑,提高了我的英语水平;)可能重复的