Question

这个存储数据在sharedPreferences

中

            SharedPreferences prefsDate = getSharedPreferences("Date", MODE_PRIVATE);
            SharedPreferences.Editor editor = prefsDate.edit();
            editor.putString("Date", textDate.getText().toString());
            editor.commit();
            SharedPreferences prefsTime = getSharedPreferences("Time", MODE_PRIVATE);
            SharedPreferences.Editor edit = prefsTime.edit();
            edit.putString("Time", textTime.getText().toString());
            edit.commit();
            SharedPreferences prefs = getSharedPreferences("Event", MODE_PRIVATE);
            SharedPreferences.Editor edt = prefs.edit();
            edt.putString("Event", event.getText().toString());
            edt.commit();

这里我放了日历，但我怎么能为此获得价值（替换0）？

                Calendar calendar = Calendar.getInstance();

                calendar.set(Calendar.DAY_OF_MONTH,0);
                calendar.set(Calendar.MONTH,0);
                calendar.set(Calendar.YEAR,0);
                calendar.set(Calendar.HOUR_OF_DAY,0 );
                calendar.set(Calendar.MINUTE, 0);

                Intent myIntent = new Intent(MainActivity.this, AlarmReceiver.class);
                pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, myIntent, 0);
                alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);

Answer 1

首先，我认为你不需要3个独立的SharedPreferences来存储这3个值。

其次，您不能将值保存为String，然后将其作为Integer检索。将您的代码更改为以下内容：

SharedPreferences prefsDate = getSharedPreferences("Calendar", MODE_PRIVATE);
SharedPreferences.Editor editor = prefsDate.edit();
editor.putInt("Date", Integer.valueOf(textDate.getText().toString()));
// save other values here
editor.commit();

然后检索它们：

SharedPreferences prefsDate = getSharedPreferences("Calendar", MODE_PRIVATE);
int date = prefsDate.getInt("Date", 0);

或者，您可以使用我的SharedPreferences library，这可以为您缓解一切。

Answer 2

您可以将其保存在单个字符串中，而不是分隔日期，月份和年份：

Calendar cal = Calendar.getInstance();
        int year = cal.get(Calendar.YEAR); // get the current year
        int month = cal.get(Calendar.MONTH); // month...
        int day = cal.get(Calendar.DAY_OF_MONTH); // current day in the month
        String myDate=year + "/" + month + "/" + day;

现在您可以将整个String myDate保存在sharedPrefrence中并在您的应用中使用它：

保存字符串写入：

SharedPreferences prefsDate = getSharedPreferences("MyCalendar", MODE_PRIVATE);
SharedPreferences.Editor editor = prefsDate.edit();
editor.putString("Date",myDate);
editor.commit();

现在，要获取日期字符串，您应该写：

SharedPreferences prefsDate = getSharedPreferences("MyCalendar", MODE_PRIVATE);
private String dateFromSharedPrefences=prefsDate.getString("Date","");

如何从共享偏好中获取日历的日期和时间

2 个答案: