Bug

            </intent-filter>

        </activity>

        <activity android:name="io.heckel.ntfy.add.AddTopicActivity" />

        <activity android:name="io.heckel.ntfy.detail.TopicDetailActivity" />

        <activity android:name="io.heckel.ntfy.detail.DetailActivity" />

    </application>

</manifest>

import com.google.gson.JsonObject

import com.google.gson.JsonSyntaxException

import io.heckel.ntfy.add.AddTopicActivity

import io.heckel.ntfy.add.TOPIC_URL

import io.heckel.ntfy.data.Topic

import io.heckel.ntfy.detail.TopicDetailActivity

import io.heckel.ntfy.detail.DetailActivity

import io.heckel.ntfy.list.TopicsAdapter

import io.heckel.ntfy.list.TopicsViewModelFactory

import io.heckel.ntfy.list.TopicsViewModel

import io.heckel.ntfy.list.TopicsViewModelFactory

import kotlinx.coroutines.*

import java.io.IOException

import java.net.HttpURLConnection

import kotlin.random.Random

const val TOPIC_ID = "topic id"

const val TOPIC_URL = "url"

class MainActivity : AppCompatActivity() {

    private val gson = GsonBuilder().create()

    /* Opens TopicDetailActivity when RecyclerView item is clicked. */

    private fun adapterOnClick(topic: Topic) {

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

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

        intent.putExtra(TOPIC_ID, topic.id)

        startActivity(intent)

    }

        try {

            val input = conn.inputStream.bufferedReader()

            while (scope.isActive) {

                val line = input.readLine() ?: break // Break if null!

                val line = input.readLine() ?: break // Exit if null

                try {

                    displayNotification(gson.fromJson(line, JsonObject::class.java))

                    val json = gson.fromJson(line, JsonObject::class.java) ?: break // Exit if null

                    displayNotification(json)

                } catch (e: JsonSyntaxException) {

                    // Ignore invalid JSON

                }

import androidx.appcompat.app.AppCompatActivity

import com.google.android.material.textfield.TextInputEditText

import io.heckel.ntfy.R

const val TOPIC_URL = "url"

import io.heckel.ntfy.TOPIC_URL

class AddTopicActivity : AppCompatActivity() {

    private lateinit var addTopicUrl: TextInputEditText

import io.heckel.ntfy.list.TopicsViewModel

import io.heckel.ntfy.list.TopicsViewModelFactory

class TopicDetailActivity : AppCompatActivity() {

class DetailActivity : AppCompatActivity() {

    private val topicDetailViewModel by viewModels<TopicsViewModel> {

        TopicsViewModelFactory(this)

    }