Fix Android 5 crashes on unsubscribing

app/build.gradle

@@ -14,8 +14,8 @@ android {
         minSdkVersion 21
         targetSdkVersion 33
 
-        versionCode 31
-        versionName "1.15.2"
+        versionCode 32
+        versionName "1.16.0"
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
 

app/src/fdroid/java/io/heckel/ntfy/firebase/FirebaseMessenger.kt

@@ -1,5 +1,6 @@
 package io.heckel.ntfy.firebase
 
+@Suppress("UNUSED_PARAMETER")
 class FirebaseMessenger {
     fun subscribe(topic: String) {
         // Dummy to keep F-Droid flavor happy

app/src/main/java/io/heckel/ntfy/backup/Backuper.kt

@@ -89,7 +89,7 @@ class Backuper(val context: Context) {
 
     private suspend fun applySubscriptions(subscriptions: List<Subscription>?) {
         if (subscriptions == null) {
-            return;
+            return
         }
         val appBaseUrl = context.getString(R.string.app_base_url)
         subscriptions.forEach { s ->
@@ -119,7 +119,7 @@ class Backuper(val context: Context) {
 
     private suspend fun applyNotifications(notifications: List<Notification>?) {
         if (notifications == null) {
-            return;
+            return
         }
         notifications.forEach { n ->
             try {
@@ -188,7 +188,7 @@ class Backuper(val context: Context) {
 
     private suspend fun applyUsers(users: List<User>?) {
         if (users == null) {
-            return;
+            return
         }
         users.forEach { u ->
             try {

app/src/main/java/io/heckel/ntfy/service/SubscriberService.kt

@@ -310,11 +310,11 @@ class SubscriberService : Service() {
     override fun onTaskRemoved(rootIntent: Intent) {
         val restartServiceIntent = Intent(applicationContext, SubscriberService::class.java).also {
             it.setPackage(packageName)
-        };
-        val restartServicePendingIntent: PendingIntent = PendingIntent.getService(this, 1, restartServiceIntent, PendingIntent.FLAG_ONE_SHOT or PendingIntent.FLAG_IMMUTABLE);
-        applicationContext.getSystemService(Context.ALARM_SERVICE);
-        val alarmService: AlarmManager = applicationContext.getSystemService(Context.ALARM_SERVICE) as AlarmManager;
-        alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 1000, restartServicePendingIntent);
+        }
+        val restartServicePendingIntent: PendingIntent = PendingIntent.getService(this, 1, restartServiceIntent, PendingIntent.FLAG_ONE_SHOT or PendingIntent.FLAG_IMMUTABLE)
+        applicationContext.getSystemService(Context.ALARM_SERVICE)
+        val alarmService: AlarmManager = applicationContext.getSystemService(Context.ALARM_SERVICE) as AlarmManager
+        alarmService.set(AlarmManager.ELAPSED_REALTIME, SystemClock.elapsedRealtime() + 1000, restartServicePendingIntent)
     }
 
     /* This re-starts the service on reboot; see manifest */

app/src/main/java/io/heckel/ntfy/ui/DetailActivity.kt

@@ -7,6 +7,7 @@ import android.content.Context
 import android.content.Intent
 import android.content.Intent.ACTION_VIEW
 import android.net.Uri
+import android.os.Build
 import android.os.Bundle
 import android.text.Html
 import android.view.ActionMode
@@ -178,7 +179,7 @@ class DetailActivity : AppCompatActivity(), ActionMode.Callback, NotificationFra
         howToExample.linksClickable = true
 
         val howToText = getString(R.string.detail_how_to_example, topicUrl)
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.N) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
             howToExample.text = Html.fromHtml(howToText, Html.FROM_HTML_MODE_LEGACY)
         } else {
             howToExample.text = Html.fromHtml(howToText)
@@ -241,7 +242,7 @@ class DetailActivity : AppCompatActivity(), ActionMode.Callback, NotificationFra
         adapter.registerAdapterDataObserver(object : RecyclerView.AdapterDataObserver() {
             override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
                 if (positionStart == 0) {
-                    Log.d(TAG, "$itemCount item(s) inserted at $positionStart, scrolling to the top")
+                    Log.d(TAG, "$itemCount item(s) inserted at 0, scrolling to the top")
                     mainList.scrollToPosition(positionStart)
                 }
             }
@@ -571,7 +572,7 @@ class DetailActivity : AppCompatActivity(), ActionMode.Callback, NotificationFra
         dialog.setOnShowListener {
             dialog
                 .getButton(AlertDialog.BUTTON_POSITIVE)
-                .setTextAppearance(R.style.DangerText)
+                .dangerButton(this)
         }
         dialog.show()
     }
@@ -609,7 +610,7 @@ class DetailActivity : AppCompatActivity(), ActionMode.Callback, NotificationFra
         dialog.setOnShowListener {
             dialog
                 .getButton(AlertDialog.BUTTON_POSITIVE)
-                .setTextAppearance(R.style.DangerText)
+                .dangerButton(this)
         }
         dialog.show()
     }
@@ -619,7 +620,7 @@ class DetailActivity : AppCompatActivity(), ActionMode.Callback, NotificationFra
             handleActionModeClick(notification)
         } else if (notification.click != "") {
             try {
-                startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(notification.click)))
+                startActivity(Intent(ACTION_VIEW, Uri.parse(notification.click)))
             } catch (e: Exception) {
                 Log.w(TAG, "Cannot open click URL", e)
                 runOnUiThread {
@@ -720,7 +721,7 @@ class DetailActivity : AppCompatActivity(), ActionMode.Callback, NotificationFra
         dialog.setOnShowListener {
             dialog
                 .getButton(AlertDialog.BUTTON_POSITIVE)
-                .setTextAppearance(R.style.DangerText)
+                .dangerButton(this)
         }
         dialog.show()
     }

app/src/main/java/io/heckel/ntfy/ui/MainActivity.kt

@@ -35,7 +35,6 @@ import io.heckel.ntfy.app.Application
 import io.heckel.ntfy.db.Repository
 import io.heckel.ntfy.db.Subscription
 import io.heckel.ntfy.firebase.FirebaseMessenger
-import io.heckel.ntfy.util.Log
 import io.heckel.ntfy.msg.ApiService
 import io.heckel.ntfy.msg.DownloadManager
 import io.heckel.ntfy.msg.DownloadType
@@ -48,7 +47,6 @@ import io.heckel.ntfy.work.PollWorker
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
-import java.security.SecureRandom
 import java.util.*
 import java.util.concurrent.TimeUnit
 import kotlin.random.Random
@@ -622,7 +620,7 @@ class MainActivity : AppCompatActivity(), ActionMode.Callback, AddFragment.Subsc
         dialog.setOnShowListener {
             dialog
                 .getButton(AlertDialog.BUTTON_POSITIVE)
-                .setTextAppearance(R.style.DangerText)
+                .dangerButton(this)
         }
         dialog.show()
     }

app/src/main/java/io/heckel/ntfy/ui/MainAdapter.kt

@@ -119,7 +119,7 @@ class MainAdapter(private val repository: Repository, private val onClick: (Subs
             if (selected.contains(subscription.id)) {
                 itemView.setBackgroundResource(Colors.itemSelectedBackground(context))
             } else {
-                itemView.setBackgroundColor(Color.TRANSPARENT);
+                itemView.setBackgroundColor(Color.TRANSPARENT)
             }
         }
     }

app/src/main/java/io/heckel/ntfy/ui/ShareActivity.kt

@@ -1,7 +1,6 @@
 package io.heckel.ntfy.ui
 
 import android.content.Intent
-import android.graphics.BitmapFactory
 import android.net.Uri
 import android.os.Bundle
 import android.os.Parcelable
@@ -295,7 +294,7 @@ class ShareActivity : AppCompatActivity() {
                         .show()
                 }
             } catch (e: Exception) {
-                val message = if (e is ApiService.UnauthorizedException) {
+                val errorMessage = if (e is ApiService.UnauthorizedException) {
                     if (e.user != null) {
                         getString(R.string.detail_test_message_error_unauthorized_user, e.user.username)
                     }  else {
@@ -308,7 +307,7 @@ class ShareActivity : AppCompatActivity() {
                 }
                 runOnUiThread {
                     progress.visibility = View.GONE
-                    errorText.text = message
+                    errorText.text = errorMessage
                     errorImage.visibility = View.VISIBLE
                     errorText.visibility = View.VISIBLE
                 }

app/src/main/java/io/heckel/ntfy/ui/UserFragment.kt

@@ -5,8 +5,6 @@ import android.app.Dialog
 import android.content.Context
 import android.os.Build
 import android.os.Bundle
-import android.text.Editable
-import android.text.TextWatcher
 import android.view.View
 import android.view.WindowManager
 import android.widget.Button
@@ -16,6 +14,8 @@ import androidx.fragment.app.DialogFragment
 import com.google.android.material.textfield.TextInputEditText
 import io.heckel.ntfy.R
 import io.heckel.ntfy.db.User
+import io.heckel.ntfy.util.AfterChangedTextWatcher
+import io.heckel.ntfy.util.dangerButton
 import io.heckel.ntfy.util.validUrl
 
 class UserFragment : DialogFragment() {
@@ -98,28 +98,14 @@ class UserFragment : DialogFragment() {
 
             // Delete button should be red
             if (user != null) {
-                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
-                    dialog
-                        .getButton(AlertDialog.BUTTON_NEUTRAL)
-                        .setTextAppearance(R.style.DangerText)
-                } else {
-                    dialog
-                        .getButton(AlertDialog.BUTTON_NEUTRAL)
-                        .setTextColor(ContextCompat.getColor(requireContext(), Colors.dangerText(requireContext())))
-                }
+                dialog
+                    .getButton(AlertDialog.BUTTON_NEUTRAL)
+                    .dangerButton(requireContext())
             }
 
             // Validate input when typing
-            val textWatcher = object : TextWatcher {
-                override fun afterTextChanged(s: Editable?) {
-                    validateInput()
-                }
-                override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
-                    // Nothing
-                }
-                override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {
-                    // Nothing
-                }
+            val textWatcher = AfterChangedTextWatcher {
+                validateInput()
             }
             baseUrlView.addTextChangedListener(textWatcher)
             usernameView.addTextChangedListener(textWatcher)
@@ -140,7 +126,7 @@ class UserFragment : DialogFragment() {
         }
 
         // Show keyboard when the dialog is shown (see https://stackoverflow.com/a/19573049/1440785)
-        dialog.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE);
+        dialog.window?.setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_VISIBLE)
 
         return dialog
     }

app/src/main/java/io/heckel/ntfy/util/Util.kt

@@ -22,13 +22,16 @@ import android.util.Base64
 import android.util.TypedValue
 import android.view.View
 import android.view.Window
+import android.widget.Button
 import android.widget.ImageView
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.content.ContextCompat
 import io.heckel.ntfy.BuildConfig
 import io.heckel.ntfy.R
 import io.heckel.ntfy.db.*
 import io.heckel.ntfy.msg.MESSAGE_ENCODING_BASE64
+import io.heckel.ntfy.ui.Colors
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
@@ -218,16 +221,6 @@ fun maybeAppendActionErrors(message: String, notification: Notification): String
     }
 }
 
-// Checks in the most horrible way if a content URI exists; I couldn't find a better way
-fun fileExists(context: Context, contentUri: String?): Boolean {
-    return try {
-        fileStat(context, Uri.parse(contentUri)) // Throws if the file does not exist
-        true
-    } catch (_: Exception) {
-        false
-    }
-}
-
 // Queries the filename of a content URI
 fun fileName(context: Context, contentUri: String?, fallbackName: String): String {
     return try {
@@ -455,10 +448,6 @@ fun String.readBitmapFromUriOrNull(context: Context): Bitmap? {
     }
 }
 
-fun Long.nullIfZero(): Long? {
-    return if (this == 0L) return null else this
-}
-
 // TextWatcher that only implements the afterTextChanged method
 class AfterChangedTextWatcher(val afterTextChangedFn: (s: Editable?) -> Unit) : TextWatcher {
     override fun afterTextChanged(s: Editable?) {
@@ -506,3 +495,11 @@ fun String.sha256(): String {
     val digest = md.digest(this.toByteArray())
     return digest.fold("") { str, it -> str + "%02x".format(it) }
 }
+
+fun Button.dangerButton(context: Context) {
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+        setTextAppearance(R.style.DangerText)
+    } else {
+        setTextColor(ContextCompat.getColor(context, Colors.dangerText(context)))
+    }
+}

fastlane/metadata/android/en-US/changelog/32.txt

@@ -0,0 +1,2 @@
+Bug fixes:
+* Android 5 (SDK 21): Fix crash on unsubscribing (#528, thanks to Roger M.)