cannot find symbol class UploadIntentService

Question

I´m a student learning how to crate an android app. currently i´m learning about ServiceIntents. Following my transcript: to test the upload funcionality of a button, i have to use the UploadIntentService-class. But if i write the code exactly how it´s shown in my transcript Android Studio already highlight UploadIntentServicein red.

Here´s the code from the transcript (MainActivity.java):

public void onClickUpload (View button){
    Intent uploadIntent = new Intent(this, UploadIntentService.class);
    startService(uploadIntent);
}

protected void onHandleIntent(Intent intent){
    Log.v(UploadIntentService.class.getSimpleName(), "Service sleeping...");
    try {
        Thread.sleep(10000);
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
    Log.v(UploadIntentService.class.getSimpleName(), "Service wake up...");
}

Imports:

import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.app.IntentService;

If i try to run the app the build process can´t be done:

cannot find symbol class UploadIntentService
cannot find symbol class UploadIntentService
cannot find symbol class UploadIntentService
uses or overrides a deprecated API.

I´m working with java, not Kotlin.

Answer 1

This line starts your service UploadIntentService

startService(uploadIntent);

But you need to create this service first, means you need to create a new class, which extends IntentService and which is doing actual upload (or whatever you want it to do). Example:

public class UploadIntentService extends IntentService {

    public UploadIntentService() {
        super("UploadIntentService");
    }

    @Override
    protected void onHandleIntent(@Nullable Intent intent) {
        // put your code here to upload
    }
}

Service should also be registered in AndroidManifest.xml in application section. Example:

<application>
.....
    <service
          android:name="com.example.myapplication. UploadIntentService"
          android:enabled="true"
    />
</application>