日期选择器Android棒棒糖中未调用OnDateChanged [英] OnDateChanged is not called in Date picker Android lollipop
本文介绍了日期选择器Android棒棒糖中未调用OnDateChanged的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有自定义的 datepicker 和时间 picker .在api级别21之前，它工作正常，但之后不起作用.我调试了代码，发现在更改日期时未调用 ondatechanged 和 ontimechanged .
I have custom datepicker and time picker.it was working fine befor api level 21 but after it is not working. i debugged the code and came to know that ondatechanged and ontimechanged is not called when i change the date.
那么如何解决这个问题.
So how to resolv ethis issue.
DatePicker的自定义类为-
custom class of DatePicker is -
public class DatePickerDialog extends Dialog implements OnDateChangedListener,OnClickListener{
private static DatePickerDialog dialog;
private String date;
private String title;
private DatePickerCallback callback;
private DatePicker datePicker;
private TextView tvHeading;
private Button btnDone;
private String lastModifiedDate;
private String initialDate;
private boolean isStartDateToday;
private long currentDateInMS = 0;
private Context context;
private int noOfDaysBefore = 0;
public DatePickerDialog(Context context, DatePickerCallback callback, String date, String title, boolean isStartDateToday,int noOfDaysBefore) {
super(context);
this.context = context;
this.callback = callback;
this.date = date;
this.lastModifiedDate = date;
this.initialDate = date;
this.title = title;
this.isStartDateToday = isStartDateToday;
this.noOfDaysBefore = noOfDaysBefore;
}
public interface DatePickerCallback {
public void setDate(String date);
}
public static void showDatePickerDialog(Context context,DatePickerCallback callback,String date,String title,int numOfDaysBefore){
dialog = new DatePickerDialog(context, callback, date,title,false,numOfDaysBefore);
dialog.show();
}
public static void showDatePickerDialogStartDateToday(Context context,DatePickerCallback callback,String date,String title){
dialog = new DatePickerDialog(context, callback, date,title,true,0);
dialog.show();
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.layout_datepicker);
getWindow().getAttributes().windowAnimations = R.style.animationdialog;
findAllIds();
setListener();
init(date);
}
private void findAllIds(){
tvHeading = (TextView)findViewById(R.id.tv_heading);
datePicker = (DatePicker)findViewById(R.id.datePicker);
btnDone = (Button)findViewById(R.id.btn_done);
tvHeading.setText(title);
}
private void setListener(){
btnDone.setOnClickListener(this);
}
private long getMilisecondsFromCalendar(int noOfDays){
SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyy HH:mm:ss");
String previousDate = CommonFunction.getDateBeforeOrAfterNoOfDays(
CommonFunction.getCurrentDate("ddMMyyyy HH:mm:ss"), noOfDaysBefore, "ddMMyyyy HH:mm:ss");
Date date;
Calendar calendar = Calendar.getInstance();
try {
date = sdf.parse(previousDate);
calendar.setTime(date);
} catch (ParseException e) {
e.printStackTrace();
}
return calendar.getTimeInMillis();
}
private void init(String date){
String date_str = CommonFunction.formatDate("yyyyMMdd", "dd MM yyyy", date);
String datearr[] = date_str.split(" ");
Calendar calendar = Calendar.getInstance();
calendar.set(Integer.parseInt(datearr[2]), Integer.parseInt(datearr[1]), Integer.parseInt(datearr[0]));
int iDay=calendar.get(Calendar.DATE);
int iMonth=calendar.get(Calendar.MONTH);
int iYear=calendar.get(Calendar.YEAR);
if(isStartDateToday){
datePicker.setMinDate(System.currentTimeMillis()-1000);
}else{
if(currentDateInMS == 0){
currentDateInMS = getMilisecondsFromCalendar(1);//Calendar.getInstance().getTimeInMillis();
}
datePicker.setMaxDate(currentDateInMS);
}
datePicker.init(iYear, iMonth-1, iDay, this);
datePicker.setDescendantFocusability(DatePicker.FOCUS_BLOCK_DESCENDANTS);
}
@Override
public void onDateChanged(DatePicker view, int year, int monthOfYear,
int dayOfMonth) {
StringBuilder date = new StringBuilder();
date.append(year);
monthOfYear = monthOfYear +1;
if(monthOfYear < 10){
date.append("0"+monthOfYear+dayOfMonth);
}else{
date.append(monthOfYear).append(dayOfMonth);
}
if(isStartDateToday){
}else{
if(!isDateValid(date.toString())){
try{
init(lastModifiedDate);
}catch(Exception e){
e.printStackTrace();
}
return;
}
}
this.date = date.toString();
}
private boolean isDateValid(String date){
boolean flag = false;
String currentDate = CommonFunction.getCurrentDate("yyyyMMdd");
long days = CommonFunction.getNoOfDaysBetweenDate(currentDate, date, "yyyyMMdd");
// long days = CommonFunction.getNoOfDaysBetweendate(CommonFunction.formatDate("dd-MMM-yyyy", "ddMMyyyy", ), CommonFunction.formatDate("yyyyMMdd", "ddMMyyyy", date));
if(days <= 0){
flag = true;
lastModifiedDate = date;
}
return flag;
}
@Override
public void onClick(View v) {
switch(v.getId()){
case R.id.btn_done:
callback.setDate(this.date);
dialog.dismiss();
break;
}
}
}
布局文件是
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#88000000"
>
<TextView
android:id="@+id/tv_heading"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:background="@drawable/topcornerblue"
android:padding="@dimen/datePickerHeadingTextPadding"
android:text="@string/selectDate"
android:textColor="@color/white"
android:textSize="@dimen/datePickerHeadingTextSize" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@drawable/whitebottomcorner"
android:paddingBottom="@dimen/datePickerButtonMargin"
android:layout_below="@+id/tv_heading" >
<DatePicker
android:id="@+id/datePicker"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_margin="@dimen/datePickerMarginTop" />
<Button
android:id="@+id/btn_done"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/datePicker"
android:layout_centerHorizontal="true"
android:layout_marginTop="@dimen/datePickerMarginTop"
android:background="#14768D"
android:padding="@dimen/datePickerHeadingTextPadding"
android:text="@string/done"
android:textColor="@color/white"
android:minWidth="@dimen/datePickerButtonMinWidth"
android:minHeight="@dimen/datePickerButtonMinHeight"
android:textSize="@dimen/datePickerButtonTextSize"
android:visibility="visible" />
</RelativeLayout>
</RelativeLayout>
推荐答案
当datepicker处于其新的材质样式日历模式时，这是Android 5.0及更高版本中的错误.您可以通过在DatePicker上设置 android:datePickerMode ="spinner" 来强制datepicker使用5.0之前的Spinner模式来解决此错误.
This is a bug in Android 5.0 and up that occurs when the datepicker is in its new material style calendar mode.
You can work around this bug by forcing the datepicker to use the pre-5.0 spinner mode by setting android:datePickerMode="spinner" on the DatePicker.
或者您也可以使用 DatePickerDialog .即使对话框处于新的材料日历模式，对话框的侦听器的 onDateChanged 方法也会被调用.
Or you can use the DatePickerDialog instead. The onDateChanged method of the dialog's listener does get called, even if the dialog is in the new material calendar mode.
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