Kotlin, Intent: None of the following functions can be called with the arguments supplied

user_5390254 0
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Intent doesn't work with RestApiService callback.

Previously It worked in RegisterActivity:

fun alert(text: String) {
    val intent = Intent(this, PopUp::class.java)
    intent.putExtra("text", text)
    startActivity(intent)
}

I want to display the result as a pop-up message. PopUp is a custom activity view.

When I place it into another class, there is an error:

None of the following functions can be called with the arguments

supplied. (Context!, Class<*>!) defined in

android.content.Intent (String!, Uri!) defined in

android.content.Intent

import android.content.Intent
import androidx.core.content.ContextCompat.startActivity
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class RestApiService {

// MY CUSTOM INTENT! WORKED BEFORE IF TO PLACE INTO AN ACTIVITY.
fun alert(text: String) {
    val intent = Intent(this, PopUp::class.java)
    intent.putExtra("text", text)
    startActivity(intent)
}

fun addUser(userData: ModelUserRegister, onResult: (ModelUserRegister?) -> Unit){
    val retrofit = ServiceBuilder.buildService(RestApi::class.java)
    retrofit.addUser(userData).enqueue(

        object : Callback<ModelUserRegister> {

            override fun onFailure(call: Call<ModelUserRegister>, t: Throwable) {
                onResult(null)
            }

            override fun onResponse(call: Call<ModelUserRegister>, response: Response<ModelUserRegister>) {
                val addedUser = response.body()
                if (response.code() in 200..320)
                {
                    alert(response.message())
                } else {
                    alert(response.message())
                }
                onResult(addedUser)
            }
        }
    )
}
}

The latest research gave me the advice to change:

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

to:

val intent = Intent(RegisterActivity.this, PopUp::class.java)

Didn't help. This question for those people who want to use Kotlin!

kotlin alert android-intent
4 Answers

To create a new Intent object, you have to pass context as the first parameter. You cannot just use this anywhere since depending on where you use it, it might not be context.

You can use this or this@ActivityName (ActivityName.this in Java) only when your codes are in an activity.

You can add a context parameter to your alert() function to fix this issue:

fun alert(context: Context, text: String) {
    val intent = Intent(context, PopUp::class.java)
    intent.putExtra("text", text)
    context.startActivity(intent)
}
user_104068810

Step1. Considering an absence of information the easiest solution is to use callback or return value (String? in my case).

class RestApiService {

    fun addUser(userData: ModelUserRegister, onResult: (ModelUserRegister?, String?)-> Unit){
        //... code
        onResult(addedUser, response.message())
    }
}

Step2. Call the returned value from the main Activity and use an Intent with alert View

apiService.addUser(userInfo) { modelUserRegister: ModelUserRegister?, s: String? ->
    if (s != null) {
        alert(s)
    } else {
        alert("NO TEXT AS A RESULT")
    }
}

Still waiting for any suggestions to call the Intent outside the Activity class.

user_53902540

You may try this one, if from a fragment:

val intent = Intent(requireContext, PopUp::class.java)
user_118222330

You should use applicationContext instead. There are three contexts an intent or toast will accept. They are applicationContext, requireContext, or this.

Your code should look like this:

val intent = Intent(application Context, Second activity::class.java)
startActivity(intent)
user_160469270
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