优化

app/src/main/java/io/legado/app/ui/book/source/manage/BookSourceViewModel.kt

@@ -10,6 +10,7 @@ import io.legado.app.constant.AppPattern
 import io.legado.app.data.appDb
 import io.legado.app.data.entities.BookSource
 import io.legado.app.utils.*
+import java.io.FileOutputStream
 
 class BookSourceViewModel(application: Application) : BaseViewModel(application) {
 
@@ -135,13 +136,16 @@ class BookSourceViewModel(application: Application) : BaseViewModel(application)
         }
     }
 
+    @Suppress("BlockingMethodInNonBlockingContext")
     fun shareSelection(sources: List<BookSource>, success: ((intent: Intent) -> Unit)) {
         execute {
             val tmpSharePath = "${context.filesDir}/shareBookSource.json"
             FileUtils.delete(tmpSharePath)
             val intent = Intent(Intent.ACTION_SEND)
             val file = FileUtils.createFileWithReplace(tmpSharePath)
-            file.writeText(GSON.toJson(sources))
+            FileOutputStream(file).use {
+                GSON.writeToOutputStream(it, sources)
+            }
             val fileUri = FileProvider.getUriForFile(context, AppConst.authority, file)
             intent.type = "text/*"
             intent.putExtra(Intent.EXTRA_STREAM, fileUri)

app/src/main/java/io/legado/app/utils/GsonExtensions.kt

@@ -3,7 +3,10 @@ package io.legado.app.utils
 import com.google.gson.*
 import com.google.gson.internal.LinkedTreeMap
 import com.google.gson.reflect.TypeToken
+import com.google.gson.stream.JsonWriter
 import timber.log.Timber
+import java.io.OutputStream
+import java.io.OutputStreamWriter
 import java.lang.reflect.ParameterizedType
 import java.lang.reflect.Type
 import kotlin.math.ceil
@@ -39,6 +42,23 @@ inline fun <reified T> Gson.fromJsonArray(json: String?): List<T>? {
     }.getOrNull()
 }
 
+fun Gson.writeToOutputStream(out: OutputStream, any: Any) {
+    val writer = JsonWriter(OutputStreamWriter(out, "UTF-8"))
+    writer.setIndent("  ")
+    if (any is List<*>) {
+        writer.beginArray()
+        any.forEach {
+            it?.let {
+                GSON.toJson(it, it::class.java, writer)
+            }
+        }
+        writer.endArray()
+    } else {
+        GSON.toJson(any, any::class.java, writer)
+    }
+    writer.close()
+}
+
 class ParameterizedTypeImpl(private val clazz: Class<*>) : ParameterizedType {
     override fun getRawType(): Type = List::class.java