public void SetReminder(int hour, int min, string title, string content)
{
_title = title;
_content = content;
var calendar = Calendar.GetInstance(Locale.Default);
var setCalendar = Calendar.GetInstance(Locale.Default);
setCalendar.Set(CalendarField.HourOfDay, hour);
setCalendar.Set(CalendarField.Minute, min);
setCalendar.Set(CalendarField.Second, 0);
CancelReminder();
if (setCalendar.Before(calendar))
{
setCalendar.Add(CalendarField.Date, 1);
}
var alarmReceiver = new AlarmReceiver(title, content);
var componentName = new ComponentName(Application.Context, alarmReceiver.Class);
var packageManager = Application.Context.PackageManager;
packageManager.SetComponentEnabledSetting(componentName, ComponentEnabledState.Enabled, ComponentEnableOption.DontKillApp);
var intent = new Intent(Application.Context, alarmReceiver.Class);
intent.PutExtra(TitleKey, title);
intent.PutExtra(MessageKey, content);
var pendingIntent = PendingIntent.GetBroadcast(Application.Context, DAILY_REMINDER_REQUEST_CODE, intent,
PendingIntentFlags.UpdateCurrent);
var alarmManager = (AlarmManager)Application.Context.GetSystemService(Context.AlarmService);
alarmManager.SetInexactRepeating(AlarmType.RtcWakeup, setCalendar.TimeInMillis, AlarmManager.IntervalDay, pendingIntent);
}
public void CreateKeyPair()
{
DeleteKey();
KeyPairGenerator keyGenerator =
KeyPairGenerator.GetInstance(KeyProperties.KeyAlgorithmRsa, KEYSTORE_NAME);
if (Build.VERSION.SdkInt >= BuildVersionCodes.JellyBeanMr2 &&
Build.VERSION.SdkInt <= BuildVersionCodes.LollipopMr1)
{
var calendar = Calendar.GetInstance(_context.Resources.Configuration.Locale);
var endDate = Calendar.GetInstance(_context.Resources.Configuration.Locale);
endDate.Add(CalendarField.Year, 20);
//this API is obsolete after Android M, but I am supporting Android L, so I need this
#pragma warning disable 618
var builder = new KeyPairGeneratorSpec.Builder(_context)
#pragma warning restore 618
.SetAlias(_keyName).SetSerialNumber(BigInteger.One)
.SetSubject(new X500Principal($"CN={_keyName} CA Certificate"))
.SetStartDate(calendar.Time)
.SetEndDate(endDate.Time).SetKeySize(KeySize);
keyGenerator.Initialize(builder.Build());
}
else if (Build.VERSION.SdkInt >= BuildVersionCodes.M)
{
var builder =
new KeyGenParameterSpec.Builder(_keyName, KeyStorePurpose.Encrypt | KeyStorePurpose.Decrypt)
.SetBlockModes(KeyProperties.BlockModeEcb)
.SetEncryptionPaddings(KeyProperties.EncryptionPaddingRsaPkcs1)
.SetRandomizedEncryptionRequired(false).SetKeySize(KeySize);
keyGenerator.Initialize(builder.Build());
}
keyGenerator.GenerateKeyPair();
}