Google 日历 API 和警报管理器错误
Google Calendar API & Alarm Manager Error
我使用此代码从 Google 日历 API 中获得了 1 小时的免费时段。
MainActivity.java:
private List<String> getDataFromApi() throws IOException {
LocalDateTime now = LocalDateTime.now();
int year = now.getYear();
int month = now.getMonthOfYear();
int day = now.getDayOfMonth();
org.joda.time.DateTime startDateJoda= new org.joda.time.DateTime(year,month,day,7,00);
org.joda.time.DateTime endDateJoda= new org.joda.time.DateTime(year,month,day,22,00);
// Convert from Joda-Time to old bundled j.u.Date
java.util.Date juDateStart = startDateJoda.toDate();
java.util.Date juDateEnd = endDateJoda.toDate();
Log.v(TAG,"Start Date joda value: "+juDateStart.toString());
Log.v(TAG,"End Date joda value: "+juDateEnd.toString());
// Convert from j.u.Date to Google Date.
com.google.api.client.util.DateTime googleDateTimeStart = new com.google.api.client.util.DateTime( juDateStart );
com.google.api.client.util.DateTime googleDateTimeEnd = new com.google.api.client.util.DateTime( juDateEnd );
Log.v(TAG,"Start Date Google value: "+googleDateTimeStart.toString());
Log.v(TAG,"End Date Google value: "+googleDateTimeEnd.toString());
List<String> eventStrings = new ArrayList<String>();
org.joda.time.DateTime rootStart = startDateJoda;
org.joda.time.DateTime rootEnd = endDateJoda;
Events events = mService.events().list("primary")
.setMaxResults(10)
.setTimeMin(googleDateTimeStart)
.setTimeMax(googleDateTimeEnd)
.setOrderBy("startTime")
.setSingleEvents(true)
.execute();
List<Event> items = events.getItems();
Log.v(TAG,"Items : "+items.toString()+"\n");
Log.v(TAG,"Items size : "+items.size());
int interval = 1 ; // how big single slot should be (in this case 1 hrs)
ArrayList<MyEvent> freeSlots = new ArrayList<MyEvent>();
for (int index =0;index<items.size();index++) {
Event event = items.get(index);
Log.v(TAG,"Items Index: "+event.toString()+"\n");
DateTime teststart=event.getStart().getDateTime();
DateTime testend=event.getEnd().getDateTime();
Log.v(TAG,"Test Start Date value: "+teststart.toString());
Log.v(TAG,"Test End Date value: "+testend.toString());
long milliseconds1 = teststart.getValue();
long milliseconds2 = testend.getValue();
org.joda.time.DateTime eventStartJoda= new org.joda.time.DateTime(milliseconds1);
org.joda.time.DateTime eventEndJoda= new org.joda.time.DateTime(milliseconds2);
Log.v(TAG,"Event Start Date joda value: "+eventStartJoda.toString());
Log.v(TAG,"Event Date joda value: "+eventEndJoda.toString());
Log.v(TAG,"Before if index == 0 && start<end");
if ((index == 0) && (startDateJoda.isBefore(eventStartJoda)) ) {
Log.v(TAG,"Before Inside if index == 0 && start<end");
freeSlots.add( new MyEvent(startDateJoda,eventEndJoda) );
Log.v(TAG,"After Inside if index == 0 && start<end");
}
if (index == 0) {
Log.v(TAG,"Before else if index == 0");
DateTime teststart2=event.getEnd().getDateTime();
long milliseconds3 = teststart2.getValue();
startDateJoda=new org.joda.time.DateTime(milliseconds3);
Log.v(TAG,"startDateJoda value: "+startDateJoda.toString());
}
long milliseconds5=0;
Log.v(TAG,"Before teststart4");
if(index!=0) {
DateTime teststart4 = items.get(index - 1).getEnd().getDateTime();
Log.v(TAG, "After teststart4");
milliseconds5 = teststart4.getValue();
Log.v(TAG, "Before if milliseconds5");
}
if (new org.joda.time.DateTime(milliseconds5).isBefore(eventStartJoda)) {
if(index!=0) {
freeSlots.add(new MyEvent
(new org.joda.time.DateTime(milliseconds5), eventStartJoda));
Log.v(TAG,"xxxxxxx1 value: "+ new org.joda.time.DateTime(milliseconds5).toString());
}
}
DateTime teststart3=event.getEnd().getDateTime();
long milliseconds4 = teststart3.getValue();
if ((items.size() == (index + 1)) && new org.joda.time.DateTime(milliseconds4).isBefore(endDateJoda)) {
freeSlots.add(new MyEvent(eventEndJoda, endDateJoda));
Log.v(TAG,"xxxxxxx2 value: "+ new org.joda.time.DateTime(milliseconds4).toString());
}
}
Log.v(TAG,"Before outside items size == 0 ");
if (items.size() == 0) {
Log.v(TAG,"Before Inside items size == 0 ");
freeSlots.add(new MyEvent(startDateJoda,endDateJoda));
Log.v(TAG,"After Inside items size == 0 ");
}
Log.v(TAG,"After outside items size == 0 ");
ArrayList<MyEvent> hourSlots = new ArrayList<MyEvent>();
org.joda.time.DateTime tempstart= null;
org.joda.time.DateTime tempend= null;
MyEvent temp = new MyEvent();
int val=0;
for(int index =0;index<freeSlots.size();index++){
MyEvent free = (MyEvent) freeSlots.get(index);
Log.v(TAG,"Free slot size : "+freeSlots.size());
int freeHours = free.endDate.getHourOfDay()- free.startDate.getHourOfDay();
Log.v(TAG,"FreeHours: "+freeHours);
org.joda.time.DateTime freeStart = free.startDate, freeEnd = free.endDate;
Log.v(TAG,"Free Start Date: "+free.startDate.toString()+"Free End Date: "+free.endDate.toString());
Log.v(TAG,"Before eventStrings: "+free.startDate.toString()+" : "+free.endDate.toString());
while(freeStart.getHourOfDay() + freeHours + interval>=0) { if(freeHours>=interval) {
Log.v(TAG,"free startDate : "+free.startDate);
tempend=free.startDate;
Log.v(TAG,"Temp startDate : "+tempend);
tempend= tempend.hourOfDay().setCopy(tempend.getHourOfDay()+freeHours);
Log.v(TAG,"Tmp Start Date1: "+String.valueOf(tempstart)+"Tmp End Date1: "+String.valueOf(tempend));
tempstart=free.startDate;
Log.v(TAG,"Temp endDate : "+tempstart);
tempstart = tempstart.hourOfDay().setCopy(tempstart.getHourOfDay()+freeHours-interval);
Log.v(TAG,"Tmp Start Date2: "+tempstart+"Tmp End Date2: "+tempend);
if(tempstart.getHourOfDay() >= freeStart.getHourOfDay() && tempend.getHourOfDay() <= freeEnd.getHourOfDay()) {
Log.v(TAG,"While loop inside if condition inside if condition inside");
if(val!=0) {
hourSlots.add(new MyEvent(tempstart, tempend));
Log.v(TAG, "Tmp hour slot: " + tempstart + " : " + tempend);
eventStrings.add(
String.format(" " + tempstart.toString("dd/MM/yy HH:mm:ss") + " - " + tempend.toString("dd/MM/yy HH:mm:ss")));
Log.v(TAG, "After eventStrings: " + tempstart.toString("dd/MM/yy HH:mm:ss") + " : " + tempend.toString("dd/MM/yy HH:mm:ss"));
int hour=Integer.valueOf(tempstart.toString("HH"));
int mminute=Integer.valueOf(tempstart.toString("mm"));
Log.v(TAG,"Alarm Time "+hour+":"+mminute);
startAlarm(hour,mminute);
}
val++;
tempstart=null;
tempend=null;
}
}
freeHours--;
}
}
Log.v(TAG,"Event Strings : "+eventStrings);
return eventStrings;
}
MainActivity.java(部分code2):
在此代码段中，我为每个空闲时间段的开始时间创建了警报。
int broadcastCode=0;
public void startAlarm(int hour,int mminute){
broadcastCode++;
Intent intent=new Intent(MainActivity.this,MyBroadcastReceiver.class);
PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,broadcastCode,intent,0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Calendar cal_alarm=Calendar.getInstance();
cal_alarm.set(Calendar.HOUR_OF_DAY,hour);
cal_alarm.set(Calendar.MINUTE,mminute);
cal_alarm.set(Calendar.SECOND,00);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
alarmManager.setExact(AlarmManager.RTC_WAKEUP,cal_alarm.getTimeInMillis(),pendingIntent);
Toast.makeText(MainActivity.this,"Alarm > KITKAT & Alarm Set For: "+hour+" : "+mminute,Toast.LENGTH_SHORT).show();
}
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT){
alarmManager.set(AlarmManager.RTC_WAKEUP,cal_alarm.getTimeInMillis(),pendingIntent);
Toast.makeText(MainActivity.this,"Alarm < KITKAT & Alarm Set For: "+hour+" : "+mminute,Toast.LENGTH_SHORT).show();
}
}
当我在 getDataFromApi() 函数的 while 循环中调用 startAlarm() 函数时，
我收到这个错误：
can't create handler inside thread that has not called Looper.prepare()
如果有人能给我解决方案或指导，我将很高兴。谢谢。
在此处查看 link：
Can't create handler inside thread that has not called Looper.prepare()
但问题是 startAlarm 方法中的 'toast' 行，如下所示：
Toast.makeText(MainActivity.this,"Alarm > KITKAT & Alarm Set For: "+hour+" : "+mminute,Toast.LENGTH_SHORT).show();
任何时候在 Android 中更新视图都必须在 'main thread' 上完成，也称为 'UI thread'。
在这里使用日志记录可能比 toast 更好。
我使用此代码从 Google 日历 API 中获得了 1 小时的免费时段。
MainActivity.java:
private List<String> getDataFromApi() throws IOException {
LocalDateTime now = LocalDateTime.now();
int year = now.getYear();
int month = now.getMonthOfYear();
int day = now.getDayOfMonth();
org.joda.time.DateTime startDateJoda= new org.joda.time.DateTime(year,month,day,7,00);
org.joda.time.DateTime endDateJoda= new org.joda.time.DateTime(year,month,day,22,00);
// Convert from Joda-Time to old bundled j.u.Date
java.util.Date juDateStart = startDateJoda.toDate();
java.util.Date juDateEnd = endDateJoda.toDate();
Log.v(TAG,"Start Date joda value: "+juDateStart.toString());
Log.v(TAG,"End Date joda value: "+juDateEnd.toString());
// Convert from j.u.Date to Google Date.
com.google.api.client.util.DateTime googleDateTimeStart = new com.google.api.client.util.DateTime( juDateStart );
com.google.api.client.util.DateTime googleDateTimeEnd = new com.google.api.client.util.DateTime( juDateEnd );
Log.v(TAG,"Start Date Google value: "+googleDateTimeStart.toString());
Log.v(TAG,"End Date Google value: "+googleDateTimeEnd.toString());
List<String> eventStrings = new ArrayList<String>();
org.joda.time.DateTime rootStart = startDateJoda;
org.joda.time.DateTime rootEnd = endDateJoda;
Events events = mService.events().list("primary")
.setMaxResults(10)
.setTimeMin(googleDateTimeStart)
.setTimeMax(googleDateTimeEnd)
.setOrderBy("startTime")
.setSingleEvents(true)
.execute();
List<Event> items = events.getItems();
Log.v(TAG,"Items : "+items.toString()+"\n");
Log.v(TAG,"Items size : "+items.size());
int interval = 1 ; // how big single slot should be (in this case 1 hrs)
ArrayList<MyEvent> freeSlots = new ArrayList<MyEvent>();
for (int index =0;index<items.size();index++) {
Event event = items.get(index);
Log.v(TAG,"Items Index: "+event.toString()+"\n");
DateTime teststart=event.getStart().getDateTime();
DateTime testend=event.getEnd().getDateTime();
Log.v(TAG,"Test Start Date value: "+teststart.toString());
Log.v(TAG,"Test End Date value: "+testend.toString());
long milliseconds1 = teststart.getValue();
long milliseconds2 = testend.getValue();
org.joda.time.DateTime eventStartJoda= new org.joda.time.DateTime(milliseconds1);
org.joda.time.DateTime eventEndJoda= new org.joda.time.DateTime(milliseconds2);
Log.v(TAG,"Event Start Date joda value: "+eventStartJoda.toString());
Log.v(TAG,"Event Date joda value: "+eventEndJoda.toString());
Log.v(TAG,"Before if index == 0 && start<end");
if ((index == 0) && (startDateJoda.isBefore(eventStartJoda)) ) {
Log.v(TAG,"Before Inside if index == 0 && start<end");
freeSlots.add( new MyEvent(startDateJoda,eventEndJoda) );
Log.v(TAG,"After Inside if index == 0 && start<end");
}
if (index == 0) {
Log.v(TAG,"Before else if index == 0");
DateTime teststart2=event.getEnd().getDateTime();
long milliseconds3 = teststart2.getValue();
startDateJoda=new org.joda.time.DateTime(milliseconds3);
Log.v(TAG,"startDateJoda value: "+startDateJoda.toString());
}
long milliseconds5=0;
Log.v(TAG,"Before teststart4");
if(index!=0) {
DateTime teststart4 = items.get(index - 1).getEnd().getDateTime();
Log.v(TAG, "After teststart4");
milliseconds5 = teststart4.getValue();
Log.v(TAG, "Before if milliseconds5");
}
if (new org.joda.time.DateTime(milliseconds5).isBefore(eventStartJoda)) {
if(index!=0) {
freeSlots.add(new MyEvent
(new org.joda.time.DateTime(milliseconds5), eventStartJoda));
Log.v(TAG,"xxxxxxx1 value: "+ new org.joda.time.DateTime(milliseconds5).toString());
}
}
DateTime teststart3=event.getEnd().getDateTime();
long milliseconds4 = teststart3.getValue();
if ((items.size() == (index + 1)) && new org.joda.time.DateTime(milliseconds4).isBefore(endDateJoda)) {
freeSlots.add(new MyEvent(eventEndJoda, endDateJoda));
Log.v(TAG,"xxxxxxx2 value: "+ new org.joda.time.DateTime(milliseconds4).toString());
}
}
Log.v(TAG,"Before outside items size == 0 ");
if (items.size() == 0) {
Log.v(TAG,"Before Inside items size == 0 ");
freeSlots.add(new MyEvent(startDateJoda,endDateJoda));
Log.v(TAG,"After Inside items size == 0 ");
}
Log.v(TAG,"After outside items size == 0 ");
ArrayList<MyEvent> hourSlots = new ArrayList<MyEvent>();
org.joda.time.DateTime tempstart= null;
org.joda.time.DateTime tempend= null;
MyEvent temp = new MyEvent();
int val=0;
for(int index =0;index<freeSlots.size();index++){
MyEvent free = (MyEvent) freeSlots.get(index);
Log.v(TAG,"Free slot size : "+freeSlots.size());
int freeHours = free.endDate.getHourOfDay()- free.startDate.getHourOfDay();
Log.v(TAG,"FreeHours: "+freeHours);
org.joda.time.DateTime freeStart = free.startDate, freeEnd = free.endDate;
Log.v(TAG,"Free Start Date: "+free.startDate.toString()+"Free End Date: "+free.endDate.toString());
Log.v(TAG,"Before eventStrings: "+free.startDate.toString()+" : "+free.endDate.toString());
while(freeStart.getHourOfDay() + freeHours + interval>=0) { if(freeHours>=interval) {
Log.v(TAG,"free startDate : "+free.startDate);
tempend=free.startDate;
Log.v(TAG,"Temp startDate : "+tempend);
tempend= tempend.hourOfDay().setCopy(tempend.getHourOfDay()+freeHours);
Log.v(TAG,"Tmp Start Date1: "+String.valueOf(tempstart)+"Tmp End Date1: "+String.valueOf(tempend));
tempstart=free.startDate;
Log.v(TAG,"Temp endDate : "+tempstart);
tempstart = tempstart.hourOfDay().setCopy(tempstart.getHourOfDay()+freeHours-interval);
Log.v(TAG,"Tmp Start Date2: "+tempstart+"Tmp End Date2: "+tempend);
if(tempstart.getHourOfDay() >= freeStart.getHourOfDay() && tempend.getHourOfDay() <= freeEnd.getHourOfDay()) {
Log.v(TAG,"While loop inside if condition inside if condition inside");
if(val!=0) {
hourSlots.add(new MyEvent(tempstart, tempend));
Log.v(TAG, "Tmp hour slot: " + tempstart + " : " + tempend);
eventStrings.add(
String.format(" " + tempstart.toString("dd/MM/yy HH:mm:ss") + " - " + tempend.toString("dd/MM/yy HH:mm:ss")));
Log.v(TAG, "After eventStrings: " + tempstart.toString("dd/MM/yy HH:mm:ss") + " : " + tempend.toString("dd/MM/yy HH:mm:ss"));
int hour=Integer.valueOf(tempstart.toString("HH"));
int mminute=Integer.valueOf(tempstart.toString("mm"));
Log.v(TAG,"Alarm Time "+hour+":"+mminute);
startAlarm(hour,mminute);
}
val++;
tempstart=null;
tempend=null;
}
}
freeHours--;
}
}
Log.v(TAG,"Event Strings : "+eventStrings);
return eventStrings;
}
MainActivity.java(部分code2):
在此代码段中，我为每个空闲时间段的开始时间创建了警报。
int broadcastCode=0;
public void startAlarm(int hour,int mminute){
broadcastCode++;
Intent intent=new Intent(MainActivity.this,MyBroadcastReceiver.class);
PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,broadcastCode,intent,0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
Calendar cal_alarm=Calendar.getInstance();
cal_alarm.set(Calendar.HOUR_OF_DAY,hour);
cal_alarm.set(Calendar.MINUTE,mminute);
cal_alarm.set(Calendar.SECOND,00);
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT){
alarmManager.setExact(AlarmManager.RTC_WAKEUP,cal_alarm.getTimeInMillis(),pendingIntent);
Toast.makeText(MainActivity.this,"Alarm > KITKAT & Alarm Set For: "+hour+" : "+mminute,Toast.LENGTH_SHORT).show();
}
if(Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT){
alarmManager.set(AlarmManager.RTC_WAKEUP,cal_alarm.getTimeInMillis(),pendingIntent);
Toast.makeText(MainActivity.this,"Alarm < KITKAT & Alarm Set For: "+hour+" : "+mminute,Toast.LENGTH_SHORT).show();
}
}
当我在 getDataFromApi() 函数的 while 循环中调用 startAlarm() 函数时，
我收到这个错误：
can't create handler inside thread that has not called Looper.prepare()
如果有人能给我解决方案或指导，我将很高兴。谢谢。
在此处查看 link： Can't create handler inside thread that has not called Looper.prepare()
但问题是 startAlarm 方法中的 'toast' 行，如下所示：
Toast.makeText(MainActivity.this,"Alarm > KITKAT & Alarm Set For: "+hour+" : "+mminute,Toast.LENGTH_SHORT).show();
任何时候在 Android 中更新视图都必须在 'main thread' 上完成，也称为 'UI thread'。
在这里使用日志记录可能比 toast 更好。