Question

您好我想在Android中将24小时转换为12小时。时间来自timepicker对话框中的用户输入，然后在textview中显示。如果用户单击选择器对话框中的PM按钮，它应自动在文本视图中显示该按钮。例如，用户点击凌晨3点，它应该在文本视图中显示为凌晨3点，而另一个用户点击下午3点，它应该在文本视图中显示在下午3点而不是15点。有什么帮助吗？

请检查我下面的代码：

            public void onTimeSet( TimePicker view, int selectedHour,
                int selectedMinute ) {
            // Gets current time
            Calendar c = Calendar.getInstance();

            hour = selectedHour;
            minute = selectedMinute;


            // set waking time into textview

           String getWT = wakingtime.getText().toString();
           wakingtime.setText( new StringBuilder().append( pad( hour ))
                    .append( ":" ).append( pad( minute ))); 


            // Assign hour set in the picker
            c.set( Calendar.HOUR, selectedHour );
            c.set( Calendar.MINUTE, selectedMinute );

            // Have Calendar calculate the substraction of hours and minutes
            c.add( Calendar.HOUR, SUB_HOUR );
            c.add( Calendar.MINUTE, SUB_MINUTE );

            // Get the hour and the minute calculated
            hour = c.get( Calendar.HOUR );
            minute = c.get( Calendar.MINUTE );

如果你没有看到任何格式，请原谅..

Answer 1

Changue：

    wakingtime.setText( new StringBuilder().append( pad( hour ))
                        .append( ":" ).append( pad( minute )));

由此：

StringBuilder sb = new StringBuilder();
if(hour>=12){                      
    sb.append(hour-12).append( ":" ).append(minute).append(" PM");
}else{
    sb.append(hour).append( ":" ).append(minute).append(" AM");
}
wakingtime.setText(sb);

Answer 2

你可以使用

String s;
if(hour>=12){                      
     s=String.formate((hour-12)+":"+minute+"PM");
 }else{
      s=String.formate(hour+":"+minute+"AM");
 }

 txtview.setText(s);

Answer 3

    scheduleTime.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Calendar mcurrentTime = Calendar.getInstance();
            int hour = mcurrentTime.get(Calendar.HOUR_OF_DAY);
            int minute = mcurrentTime.get(Calendar.MINUTE);
            TimePickerDialog mTimePicker;
            mTimePicker = new TimePickerDialog(activity, new TimePickerDialog.OnTimeSetListener() {
                @Override
                public void onTimeSet(TimePicker timePicker, int selectedHour, int selectedMinute) {

                    String choosedHour = "";
                    String choosedMinute = "";
                    String choosedTimeZone = "";
                    if(selectedHour > 12){
                        choosedTimeZone = "PM";
                       selectedHour = selectedHour - 12;
                        if(selectedHour < 10){
                            choosedHour = "0"+selectedHour;
                        }else{
                            choosedHour = ""+selectedHour;
                        }
                    }else{
                        choosedTimeZone = "AM";
                        if(selectedHour < 10){
                            choosedHour = "0"+selectedHour;
                        }else{
                            choosedHour = ""+selectedHour;
                        }
                    }

                    if(selectedMinute < 10){
                        choosedMinute = "0"+selectedMinute;
                    }else{
                        choosedMinute= ""+selectedMinute;
                    }

                    scheduleTime.setText(choosedHour + ":" + choosedMinute +" "+choosedTimeZone);
                    //scheduleTime.setText(selectedHour + ":" + selectedMinute);
                    //scheduleTime.setText( strHrsToShow+":"+datetime.get(Calendar.MINUTE)+" "+am_pm );
                }
            }, hour, minute+30, false);//Yes 24 hour time
            mTimePicker.setTitle("Select Time");
            mTimePicker.show();
        }
    });

我用这个逻辑来解决我的问题。

在Android中将24小时转换为12小时

3 个答案: