Kotlin generic bounds for Class

Question

The following generics doesn't compile. What is semantically wrong here?

Function call

start(MainActivity.javaClass) // <== Doesn't compile

Method Definition

// Definition
public fun <T : Activity> start(activityClass: Class<T>) {
    startActivity(Intent(this, activityClass))
}

Compiler Error

Error:(43, 9) Type parameter bound for T in fun <T : android.app.Activity> 
start(activityClass: java.lang.Class<T>): kotlin.Unit is not satisfied:  
inferred type com.mobsandgeeks.hellokotlin.MainActivity.
<class-object-for-MainActivity> is not a subtype of android.app.Activity

Answer 1

javaClass has been deprecated. Use this instead:

val i = Intent(this@Activity, Activity::class.java)
startActivity(i)

Answer 2

Use javaClass<MainActivity>() instead of MainActivity.javaClass

Answer 3

Another option:

inline public fun <reified T : Activity> start() {
    startActivity(Intent(this, javaClass<T>()))
}
start<MainActivity>()

Answer 4

The only way it worked for me is doing this:

val intent = Intent(this, NextActivity::class.java)
startActivity(intent)

None of the other solutions have worked, including the usage of javaClass