我想做什么::
显示消息基于
早上好(12点〜12点)
>中午好(晚上12点至晚上4点)
>晚上好(晚上4点到晚上9点)
>晚安(晚上9点到早上6点)
码：：
我使用24小时格式来获得这个逻辑
private void getTimeFromAndroid() {
Date dt = new Date();
int hours = dt.getHours();
int min = dt.getMinutes();
if(hours>=1 || hours<=12){
Toast.makeText(this,"Good Morning",Toast.LENGTH_SHORT).show();
}else if(hours>=12 || hours<=16){
Toast.makeText(this,"Good Afternoon",Toast.LENGTH_SHORT).show();
}else if(hours>=16 || hours<=21){
Toast.makeText(this,"Good Evening",Toast.LENGTH_SHORT).show();
}else if(hours>=21 || hours<=24){
Toast.makeText(this,"Good Night",Toast.LENGTH_SHORT).show();
}
}
题：
解决方法
你应该这样做：
Calendar c = Calendar.getInstance();
int timeOfDay = c.get(Calendar.HOUR_OF_DAY);
if(timeOfDay >= 0 && timeOfDay < 12){
Toast.makeText(this,Toast.LENGTH_SHORT).show();
}else if(timeOfDay >= 12 && timeOfDay < 16){
Toast.makeText(this,Toast.LENGTH_SHORT).show();
}else if(timeOfDay >= 16 && timeOfDay < 21){
Toast.makeText(this,Toast.LENGTH_SHORT).show();
}else if(timeOfDay >= 21 && timeOfDay < 24){
Toast.makeText(this,Toast.LENGTH_SHORT).show();
}