Android设置日期和时间

Android设置日期和时间

注意我测试的是申请了系统权限的app

请申请系统权限并加入写入等权限

通过Calendar获取日期和时间

getDate();
getTime();

private void getTime() {
        cal = Calendar.getInstance();
        hour = cal.get(Calendar.HOUR_OF_DAY);
        minute = cal.get(Calendar.MINUTE);
    }

    //获取当前日期
    private void getDate() {
        cal = Calendar.getInstance();
        year = cal.get(Calendar.YEAR);
        month = cal.get(Calendar.MONTH);
        day = cal.get(Calendar.DAY_OF_MONTH);
    }

日期DatePickerDialog

我们可以通过安卓原生日期控件DatePickerDialog或者DatePicker来设置日期，相对来说，DatePickerDialog会简单一点，下面我们使用DatePickerDialog来设置日期，代码如下：

                getDate();
                isUpdateDate = false;
                DatePickerDialog datePicker = new DatePickerDialog(DateTimeActivity.this, DatePickerDialog.THEME_HOLO_LIGHT, new DatePickerDialog.OnDateSetListener() {
                    @Override
                    public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
                        if (isUpdateDate) {
                            SystemUtil.setSysDate(DateTimeActivity.this, year, monthOfYear, dayOfMonth);
                        }
                    }
                }, year, month, day);
                datePicker.setButton(DialogInterface.BUTTON_POSITIVE, getString(R.string.positive), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        isUpdateDate = true;
                    }
                });
                datePicker.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.cancel), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        isUpdateDate = false;
                        datePicker.dismiss();
                    }
                });
                datePicker.getDatePicker().setCalendarViewShown(false); //隐藏日历
                datePicker.setCancelable(false);
                datePicker.setCanceledOnTouchOutside(false);
                datePicker.show();

时间TimePickerDialog

                getTime();
                isUpdateTime = false;
                TimePickerDialog timePicker = new TimePickerDialog(this, TimePickerDialog.THEME_HOLO_LIGHT, new TimePickerDialog.OnTimeSetListener() {
                    @Override
                    public void onTimeSet(TimePicker view, int hourOfDay, int minute) {
                        if (isUpdateTime) {
                            SystemUtil.setSysTime(DateTimeActivity.this, hourOfDay, minute);
                        }
                    }
                }, hour, minute, false);
                timePicker.setButton(DialogInterface.BUTTON_POSITIVE, getString(R.string.positive), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        isUpdateTime = true;
                    }
                });
                timePicker.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.cancel), new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        isUpdateTime = false;
                        timePicker.dismiss();
                    }
                });
                window = timePicker.getWindow();
                params = window.getAttributes();
                params.systemUiVisibility = View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_IMMERSIVE | View.SYSTEM_UI_FLAG_FULLSCREEN;
				//设置dialog位置
                //params.y = 300;
                window.setAttributes(params);
                timePicker.setCancelable(false);
                timePicker.setCanceledOnTouchOutside(false);
                timePicker.show();

设置日期和时间

    /**
     * 设置系统的日期
     */
    public static void setSysDate(Context context, int year, int month, int day) {
        Calendar c = Calendar.getInstance();
        c.set(Calendar.YEAR, year);
        c.set(Calendar.MONTH, month);
        c.set(Calendar.DAY_OF_MONTH, day);
        long when = c.getTimeInMillis();
        if (when / 1000 < Integer.MAX_VALUE) {
            ((AlarmManager) context.getSystemService(Context.ALARM_SERVICE)).setTime(when);
        }
    }

    /**
     * 设置系统的时间
     */
    public static void setSysTime(Context context, int hourOfDay, int minute) {
        Calendar c = Calendar.getInstance();
        c.set(Calendar.HOUR_OF_DAY, hourOfDay);
        c.set(Calendar.MINUTE, minute);
        long when = c.getTimeInMillis();
        if (when / 1000 < Integer.MAX_VALUE) {
            ((AlarmManager) context.getSystemService(Context.ALARM_SERVICE)).setTime(when);
        }
    }

优化：isUpdateTime和isUpdateDate的值表示按下了取消和确认的标识，这个为了解决安卓低版本的bug，无论取消还是点击屏幕外会执行onDateSet和onTimeSet，所以我们加入取消按钮，然后设置点击屏幕外不能取消dialog，也就是setCancelable(false)和setCanceledOnTouchOutside(false)