Android 中的日历、触发、Web 服务访问

Question

你好，我 我是安卓新手.. 我安装了三星 Galaxy 3 和 android 2.1.. 我想构建一个小部件如下..

1.我想访问手机日历..（谷歌搜索了很多不同的答案，但没有 wokrin..）（jimblackler.net/blog/?p=151 不起作用）.. 由于没有可用的公共 API，即使我能够使用谷歌日历（来自网络的日历）也没关系。让我知道哪个更容易实现。我只想读取事件..

2.如何在特定时间触发事件.. 说当 3:00 时它应该调用一个函数.. 是否可以 ？如果是这样，如何

3.我想将两个字符串发送到服务器并接收和其他文本作为结果。这将是最简单的编码方法？有一个 C# Web 服务..？或者只是在服务器上使用接受少量参数的 php 脚本？

多谢。 :)

Answer 1

第一个问题：日历访问：这基于 content://calendar/calendars URI。
首先，确保您的应用程序定义了 android.permission.READ_CALENDAR 权限。

获取日历 ID 和显示名称：

ContentResolver myContentResolver = getContentResolver();

final Cursor cursor = myContentResolver.query(Uri.parse("content://calendar/calendars"),
        (new String[] { "_id", "displayName", "selected" }), null, null, null);

while (cursor.moveToNext()) {

    final String _id = cursor.getString(0);
    final String displayName = cursor.getString(1);
    final Boolean selected = !cursor.getString(2).equals("0");
}

处理特定日历：

Uri.Builder myUriBuilder = Uri.parse("content://calendar/instances/when").buildUpon();
long currentTime = new Date().getTime();
ContentUris.appendId(myUriBuilder , currentTime  - DateUtils.WEEK_IN_MILLIS);
ContentUris.appendId(myUriBuilder, currentTime + DateUtils.WEEK_IN_MILLIS);

Cursor eventCursor = myContentResolver.query(myUriBuilder.build(),
        new String[] { "title", "begin", "end", "allDay"}, "Calendars._id=" + id,
        null, "startDay ASC, startMinute ASC");

while (eventCursor.moveToNext()) {
    // fields:
    // Event title - String - 0
    String eventTitle = eventCursor.getString(0);
    // Event start time - long - 1
    Date startTime = new Date(eventCursor.getLong(1));
    // Event end time - login - 2
    Date endTime = new Date(eventCursor.getLong(2));
    // Is it an All Day Event - String - 3 (0 is false, 1 is true)
    Boolean allDay = !eventCursor.getString(3).equals("0");

}

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Second Question: Scheduling Events:
Basically, you should use the AlarmManager class, see the android SDK for details.
Example to set the event 3 hours from now:

 Calendar cal = Calendar.getInstance();
 cal.add(Calendar.HOUR, 3);
 Intent intent = new Intent(this, MyAlarmHandler.class);
 intent.putExtra("alarm_message", "Wake up!");
 int requestCode = 3824723; // this is not currently used by Android.
 PendingIntent pIntent = PendingIntent.getBroadcast(this, requestCode, intent, PendingIntent.FLAG_UPDATE_CURRENT);
 AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
 alarmManager.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pIntent);

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Third Question: Yes, I suggest the PHP approach