Solving one of the OutOfMemory erros (too many translators instantiated at the same time)

app/src/fdroid/java/com/vitorpamplona/amethyst/service/lang/LanguageTranslatorService.kt

@@ -0,0 +1,5 @@
+package com.vitorpamplona.amethyst.service.lang
+
+object LanguageTranslatorService {
+    fun clear() {}
+}

app/src/main/java/com/vitorpamplona/amethyst/Amethyst.kt

@@ -5,7 +5,6 @@ import android.os.StrictMode
 import android.os.StrictMode.ThreadPolicy
 import android.os.StrictMode.VmPolicy
 import android.util.Log
-import androidx.media3.common.util.UnstableApi
 import coil.ImageLoader
 import com.vitorpamplona.amethyst.service.playback.VideoCache
 import kotlinx.coroutines.Dispatchers
@@ -13,7 +12,7 @@ import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import kotlin.time.measureTimedValue
 
-@UnstableApi class Amethyst : Application() {
+class Amethyst : Application() {
     val videoCache: VideoCache by lazy {
         val newCache = VideoCache()
         newCache.initFileCache(instance)

app/src/main/java/com/vitorpamplona/amethyst/service/playback/VideoCache.kt

@@ -1,7 +1,7 @@
 package com.vitorpamplona.amethyst.service.playback
 
+import android.annotation.SuppressLint
 import android.content.Context
-import androidx.media3.common.util.UnstableApi
 import androidx.media3.database.StandaloneDatabaseProvider
 import androidx.media3.datasource.cache.CacheDataSource
 import androidx.media3.datasource.cache.LeastRecentlyUsedCacheEvictor
@@ -10,7 +10,8 @@ import androidx.media3.datasource.okhttp.OkHttpDataSource
 import okhttp3.OkHttpClient
 import java.io.File
 
-@UnstableApi class VideoCache {
+@SuppressLint("UnsafeOptInUsageError")
+class VideoCache {
 
     var exoPlayerCacheSize: Long = 150 * 1024 * 1024 // 90MB
 

app/src/main/java/com/vitorpamplona/amethyst/ui/MainActivity.kt

@@ -23,6 +23,7 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.LocalPreferences
 import com.vitorpamplona.amethyst.ServiceManager
 import com.vitorpamplona.amethyst.service.ExternalSignerUtils
+import com.vitorpamplona.amethyst.service.lang.LanguageTranslatorService
 import com.vitorpamplona.amethyst.service.notifications.PushNotificationUtils
 import com.vitorpamplona.amethyst.ui.components.DefaultMutedSetting
 import com.vitorpamplona.amethyst.ui.components.keepPlayingMutex
@@ -104,7 +105,9 @@ class MainActivity : AppCompatActivity() {
     }
 
     override fun onPause() {
+        LanguageTranslatorService.clear()
         ServiceManager.cleanObservers()
+
         // if (BuildConfig.DEBUG) {
         GlobalScope.launch(Dispatchers.IO) {
             debugState(this@MainActivity)

app/src/play/java/com/vitorpamplona/amethyst/service/lang/LanguageTranslatorService.kt

@@ -24,7 +24,7 @@ data class ResultOrError(
 )
 
 object LanguageTranslatorService {
-    var executorService = Executors.newScheduledThreadPool(5)
+    var executorService = Executors.newScheduledThreadPool(3)
 
     private val options = LanguageIdentificationOptions.Builder().setExecutor(executorService).setConfidenceThreshold(0.6f).build()
     private val languageIdentification = LanguageIdentification.getClient(options)
@@ -32,7 +32,7 @@ object LanguageTranslatorService {
     val tagRegex = Pattern.compile("(nostr:)?@?(nsec1|npub1|nevent1|naddr1|note1|nprofile1|nrelay1)([qpzry9x8gf2tvdw0s3jn54khce6mua7l]+)", Pattern.CASE_INSENSITIVE)
 
     private val translators =
-        object : LruCache<TranslatorOptions, Translator>(20) {
+        object : LruCache<TranslatorOptions, Translator>(3) {
             override fun create(options: TranslatorOptions): Translator {
                 return Translation.getClient(options)
             }
@@ -47,6 +47,10 @@ object LanguageTranslatorService {
             }
         }
 
+    fun clear() {
+        translators.evictAll()
+    }
+
     fun identifyLanguage(text: String): Task<String> {
         return languageIdentification.identifyLanguage(text)
     }
@@ -61,6 +65,7 @@ object LanguageTranslatorService {
         }
 
         val options = TranslatorOptions.Builder()
+            .setExecutor(executorService)
             .setSourceLanguage(sourceLangCode)
             .setTargetLanguage(targetLangCode)
             .build()
@@ -116,7 +121,7 @@ object LanguageTranslatorService {
                 val short = "A$counter"
                 counter++
                 returningList.put(short, tag)
-            } catch (e: Exception) {
+            } catch (_: Exception) {
             }
         }
         return returningList
@@ -132,7 +137,7 @@ object LanguageTranslatorService {
                 val short = "A$counter"
                 counter++
                 returningList.put(short, lnInvoice)
-            } catch (e: Exception) {
+            } catch (_: Exception) {
             }
         }
         return returningList