/// <summary>
/// Gets the current value or the default that you specify.
/// </summary>
/// <typeparam name="T">Vaue of t (bool, int, float, long, string)</typeparam>
/// <param name="key">Key for settings</param>
/// <param name="defaultValue">default value if not set</param>
/// <returns>Value or default</returns>
public T GetValueOrDefault <T>(string key, T defaultValue = default(T))
{
lock (locker)
{
Type typeOf = typeof(T);
if (typeOf.IsGenericType && typeOf.GetGenericTypeDefinition() == typeof(Nullable <>))
{
typeOf = Nullable.GetUnderlyingType(typeOf);
}
object value = null;
var typeCode = Type.GetTypeCode(typeOf);
switch (typeCode)
{
case TypeCode.Boolean:
value = SharedPreferences.GetBoolean(key, Convert.ToBoolean(defaultValue));
break;
case TypeCode.Int64:
value = SharedPreferences.GetLong(key, Convert.ToInt64(defaultValue));
break;
case TypeCode.String:
value = SharedPreferences.GetString(key, Convert.ToString(defaultValue));
break;
case TypeCode.Int32:
value = SharedPreferences.GetInt(key, Convert.ToInt32(defaultValue));
break;
case TypeCode.UInt16:
value = SharedPreferences.GetInt(key, Convert.ToUInt16(defaultValue));
break;
case TypeCode.Single:
value = SharedPreferences.GetFloat(key, Convert.ToSingle(defaultValue));
break;
case TypeCode.Double:
value = SharedPreferences.GetFloat(key, Convert.ToSingle(defaultValue));
break;
case TypeCode.DateTime:
var ticks = SharedPreferences.GetLong(key, -1);
if (ticks == -1)
{
value = defaultValue;
}
else
{
value = new DateTime(ticks);
}
break;
}
return((null != value) ? (T)value : defaultValue);
}
}
/// <summary>
/// Gets the current value or the default that you specify.
/// </summary>
/// <typeparam name="T">Vaue of t (bool, int, float, long, string)</typeparam>
/// <param name="key">Key for settings</param>
/// <param name="defaultValue">default value if not set</param>
/// <returns>Value or default</returns>
public T GetValueOrDefault <T>(string key, T defaultValue = default(T))
{
lock (locker)
{
Type typeOf = typeof(T);
if (typeOf.IsGenericType && typeOf.GetGenericTypeDefinition() == typeof(Nullable <>))
{
typeOf = Nullable.GetUnderlyingType(typeOf);
}
object value = null;
var typeCode = Type.GetTypeCode(typeOf);
bool resave = false;
switch (typeCode)
{
case TypeCode.Decimal:
//Android doesn't have decimal in shared prefs so get string and convert
var savedDecimal = string.Empty;
try
{
savedDecimal = SharedPreferences.GetString(key, string.Empty);
}
catch (Java.Lang.ClassCastException cce)
{
Console.WriteLine("Settings 1.5 change, have to remove key.");
try
{
Console.WriteLine("Attempting to get old value.");
savedDecimal = SharedPreferences.GetLong(key, (long)Convert.ToDecimal(defaultValue, System.Globalization.CultureInfo.InvariantCulture)).ToString();
Console.WriteLine("Old value has been parsed and will be updated and saved.");
}
catch (Java.Lang.ClassCastException cce2)
{
Console.WriteLine("Could not parse old value, will be lost.");
}
Remove("key");
resave = true;
}
if (string.IsNullOrWhiteSpace(savedDecimal))
{
value = Convert.ToDecimal(defaultValue, System.Globalization.CultureInfo.InvariantCulture);
}
else
{
value = Convert.ToDecimal(savedDecimal, System.Globalization.CultureInfo.InvariantCulture);
}
if (resave)
{
AddOrUpdateValue(key, value);
}
break;
case TypeCode.Boolean:
value = SharedPreferences.GetBoolean(key, Convert.ToBoolean(defaultValue));
break;
case TypeCode.Int64:
value = (Int64)SharedPreferences.GetLong(key, (long)Convert.ToInt64(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.String:
value = SharedPreferences.GetString(key, Convert.ToString(defaultValue));
break;
case TypeCode.Double:
//Android doesn't have double, so must get as string and parse.
var savedDouble = string.Empty;
try
{
savedDouble = SharedPreferences.GetString(key, string.Empty);
}
catch (Java.Lang.ClassCastException cce)
{
Console.WriteLine("Settings 1.5 change, have to remove key.");
try
{
Console.WriteLine("Attempting to get old value.");
savedDouble = SharedPreferences.GetLong(key, (long)Convert.ToDouble(defaultValue, System.Globalization.CultureInfo.InvariantCulture)).ToString();
Console.WriteLine("Old value has been parsed and will be updated and saved.");
}
catch (Java.Lang.ClassCastException cce2)
{
Console.WriteLine("Could not parse old value, will be lost.");
}
Remove(key);
resave = true;
}
if (string.IsNullOrWhiteSpace(savedDouble))
{
value = Convert.ToDouble(defaultValue, System.Globalization.CultureInfo.InvariantCulture);
}
else
{
value = Convert.ToDouble(savedDouble, System.Globalization.CultureInfo.InvariantCulture);
}
if (resave)
{
AddOrUpdateValue(key, value);
}
break;
case TypeCode.Int32:
value = SharedPreferences.GetInt(key, Convert.ToInt32(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.Single:
value = SharedPreferences.GetFloat(key, Convert.ToSingle(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.DateTime:
var ticks = SharedPreferences.GetLong(key, -1);
if (ticks == -1)
{
value = defaultValue;
}
else
{
value = new DateTime(ticks);
}
break;
default:
if (defaultValue is Guid)
{
var outGuid = Guid.Empty;
Guid.TryParse(SharedPreferences.GetString(key, Guid.Empty.ToString()), out outGuid);
value = outGuid;
}
else
{
throw new ArgumentException(string.Format("Value of type {0} is not supported.", value.GetType().Name));
}
break;
}
return(null != value ? (T)value : defaultValue);
}
}
/// <summary>
/// Gets the current value or the default that you specify.
/// </summary>
/// <typeparam name="T">Vaue of t (bool, int, float, long, string)</typeparam>
/// <param name="key">Key for settings</param>
/// <param name="defaultValue">default value if not set</param>
/// <returns>Value or default</returns>
public T GetValueOrDefault <T>(string key, T defaultValue = default(T))
{
lock (locker)
{
Type typeOf = typeof(T);
if (typeOf.IsGenericType && typeOf.GetGenericTypeDefinition() == typeof(Nullable <>))
{
typeOf = Nullable.GetUnderlyingType(typeOf);
}
object value = null;
var typeCode = Type.GetTypeCode(typeOf);
switch (typeCode)
{
case TypeCode.Decimal:
value = (decimal)SharedPreferences.GetLong(key, (long)Convert.ToDecimal(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.Boolean:
value = SharedPreferences.GetBoolean(key, Convert.ToBoolean(defaultValue));
break;
case TypeCode.Int64:
value = (Int64)SharedPreferences.GetLong(key, (long)Convert.ToInt64(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.String:
value = SharedPreferences.GetString(key, Convert.ToString(defaultValue));
break;
case TypeCode.Double:
value = (double)SharedPreferences.GetLong(key, (long)Convert.ToDouble(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.Int32:
value = SharedPreferences.GetInt(key, Convert.ToInt32(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.Single:
value = SharedPreferences.GetFloat(key, Convert.ToSingle(defaultValue, System.Globalization.CultureInfo.InvariantCulture));
break;
case TypeCode.DateTime:
var ticks = SharedPreferences.GetLong(key, -1);
if (ticks == -1)
{
value = defaultValue;
}
else
{
value = new DateTime(ticks);
}
break;
default:
if (defaultValue is Guid)
{
var outGuid = Guid.Empty;
Guid.TryParse(SharedPreferences.GetString(key, Guid.Empty.ToString()), out outGuid);
value = outGuid;
}
else
{
throw new ArgumentException(string.Format("Value of type {0} is not supported.", value.GetType().Name));
}
break;
}
return(null != value ? (T)value : defaultValue);
}
}
