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Code Issues Projects Releases Wiki Activity

EventsFlow

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This commit is contained in:
Philipp Heckel 2021-10-25 16:16:23 -04:00
parent 464ef4e697
commit 20d5350a60
7 changed files with 92 additions and 8 deletions
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4
app/build.gradle
View file

@ -22,7 +22,7 @@ android {
compileSdkVersion 30
defaultConfig {
applicationId "com.example.recyclersample"
applicationId "io.heckel.ntfy"
minSdkVersion 21
targetSdkVersion 30
versionCode 1
@ -45,7 +45,6 @@ android {
kotlinOptions {
jvmTarget = JavaVersion.VERSION_1_8.toString()
}
}
dependencies {
@ -54,6 +53,7 @@ dependencies {
implementation "androidx.core:core-ktx:$rootProject.coreKtxVersion"
implementation "androidx.constraintlayout:constraintlayout:$rootProject.constraintLayoutVersion"
implementation "androidx.activity:activity-ktx:$rootProject.activityVersion"
implementation 'com.google.code.gson:gson:2.8.8'
// RecyclerView
implementation "androidx.recyclerview:recyclerview:$rootProject.recyclerViewVersion"

2
app/src/main/AndroidManifest.xml
View file

@ -16,7 +16,7 @@
-->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.heckel.ntfy">
package="io.heckel.ntfy">
<uses-permission android:name="android.permission.INTERNET"/>

2
app/src/main/java/io/heckel/ntfy/add/AddTopicActivity.kt
View file

@ -21,7 +21,7 @@ import android.content.Intent
import android.os.Bundle
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity
import com.heckel.ntfy.R
import io.heckel.ntfy.R
import com.google.android.material.textfield.TextInputEditText
const val TOPIC_URL = "url"

64
app/src/main/java/io/heckel/ntfy/data/NtfyApi.kt Normal file
View file

@ -0,0 +1,64 @@
package io.heckel.ntfy.data
import android.content.Context
import com.google.gson.GsonBuilder
import com.google.gson.JsonObject
import com.google.gson.JsonSyntaxException
import kotlinx.coroutines.*
import kotlinx.coroutines.flow.Flow
import kotlinx.coroutines.flow.flow
import java.io.IOException
import java.net.HttpURLConnection
import java.net.URL
class NtfyApi(context: Context) {
private val gson = GsonBuilder().create()
private suspend fun getStreamConnection(url: String): HttpURLConnection =
withContext(Dispatchers.IO) {
return@withContext (URL(url).openConnection() as HttpURLConnection).also {
it.setRequestProperty("Accept", "text/event-stream")
it.doInput = true
}
}
data class Event(val name: String = "", val data: JsonObject = JsonObject())
fun getEventsFlow(): Flow<Event> = flow {
coroutineScope {
val conn = getStreamConnection("https://ntfy.sh/_phil")
val input = conn.inputStream.bufferedReader()
try {
conn.connect()
var event = Event()
while (isActive) {
val line = input.readLine()
println("PHIL: " + line)
when {
line.startsWith("event:") -> {
event = event.copy(name = line.substring(6).trim())
}
line.startsWith("data:") -> {
val data = line.substring(5).trim()
try {
event = event.copy(data = gson.fromJson(data, JsonObject::class.java))
} catch (e: JsonSyntaxException) {
// Nothing
}
}
line.isEmpty() -> {
emit(event)
event = Event()
}
}
}
} catch (e: IOException) {
println("PHIL: " + e.message)
this.cancel(CancellationException("Network Problem", e))
} finally {
conn.disconnect()
input.close()
}
}
}
}

2
app/src/main/java/io/heckel/ntfy/detail/TopicDetailActivity.kt
View file

@ -21,7 +21,7 @@ import android.widget.Button
import android.widget.TextView
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import com.heckel.ntfy.R
import io.heckel.ntfy.R
import io.heckel.ntfy.list.TOPIC_ID
class TopicDetailActivity : AppCompatActivity() {

3
app/src/main/java/io/heckel/ntfy/list/TopicsAdapter.kt
View file

@ -19,12 +19,11 @@ package io.heckel.ntfy.list
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import android.widget.ImageView
import android.widget.TextView
import androidx.recyclerview.widget.DiffUtil
import androidx.recyclerview.widget.ListAdapter
import androidx.recyclerview.widget.RecyclerView
import com.heckel.ntfy.R
import io.heckel.ntfy.R
import io.heckel.ntfy.data.Topic
class TopicsAdapter(private val onClick: (Topic) -> Unit) :

23
app/src/main/java/io/heckel/ntfy/list/TopicsListActivity.kt
View file

@ -22,16 +22,24 @@ import android.os.Bundle
import android.view.View
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import androidx.lifecycle.Observer
import androidx.lifecycle.asLiveData
import androidx.lifecycle.lifecycleScope
import androidx.recyclerview.widget.RecyclerView
import com.heckel.ntfy.R
import io.heckel.ntfy.R
import io.heckel.ntfy.add.AddTopicActivity
import io.heckel.ntfy.add.TOPIC_URL
import io.heckel.ntfy.data.NtfyApi
import io.heckel.ntfy.data.Topic
import io.heckel.ntfy.detail.TopicDetailActivity
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import kotlinx.coroutines.withContext
const val TOPIC_ID = "topic id"
class TopicsListActivity : AppCompatActivity() {
private val api = NtfyApi(this)
private val newTopicActivityRequestCode = 1
private val topicsListViewModel by viewModels<TopicsListViewModel> {
TopicsListViewModelFactory(this)
@ -55,6 +63,19 @@ class TopicsListActivity : AppCompatActivity() {
fab.setOnClickListener {
fabOnClick()
}
val self = this
api.getEventsFlow().asLiveData(Dispatchers.IO).observe(this, Observer { event ->
// Get the Activity's lifecycleScope and launch
this.lifecycleScope.launch(Dispatchers.Main) {
// run the code again in IO context
withContext(Dispatchers.IO) {
println(event.data)
//Toast.makeText(self, event.data, Toast.LENGTH_SHORT)
}
}
}
)
}
/* Opens TopicDetailActivity when RecyclerView item is clicked. */