static string Get(string key)
{
var value = Preferences2.Get(key, null);
if (string.IsNullOrWhiteSpace(value))
{
value = Random2.GenerateRandomString(DeviceIdRLength, _Constants.DigitsLetters);
Preferences2.Set(key, value);
}
return(value);
}
/// <summary>
/// 当前是否装有 Xposed 框架
/// </summary>
/// <returns></returns>
public static bool IsXposedExists()
{
var classLoader = Java.Lang.ClassLoader.SystemClassLoader;
if (classLoader == null)
{
throw new NullReferenceException("Java.Lang.ClassLoader.SystemClassLoader is null.");
}
try
{
var xpHelperObj = classLoader.LoadClass(XPOSED_HELPERS)?.NewInstance();
}
catch (Java.Lang.InstantiationException e)
{
e.PrintStackTraceWhenDebug();
return(true);
}
catch (Java.Lang.IllegalAccessException e)
{
e.PrintStackTraceWhenDebug();
return(true);
}
catch (Java.Lang.ClassNotFoundException e)
{
e.PrintStackTraceWhenDebug();
}
try
{
var xpBridgeObj = classLoader.LoadClass(XPOSED_BRIDGE)?.NewInstance();
}
catch (Java.Lang.InstantiationException e)
{
e.PrintStackTraceWhenDebug();
return(true);
}
catch (Java.Lang.IllegalAccessException e)
{
e.PrintStackTraceWhenDebug();
return(true);
}
catch (Java.Lang.ClassNotFoundException e)
{
e.PrintStackTraceWhenDebug();
}
try
{
throw new Java.Lang.Exception(Random2.GenerateRandomString(Random2.Next(5, 10)));
// 通过主动抛出异常，检查堆栈信息来判断是否存在XP框架。
}
catch (Java.Lang.Exception e)
{
var hasFind = e.GetStackTrace()
.Any(x => x.ClassName != null &&
x.ClassName.Contains(XPOSED_BRIDGE, StringComparison.OrdinalIgnoreCase));
if (hasFind)
{
return(true);
}
}
return(false);
}