优化

app/src/main/java/io/legado/app/help/http/cronet/CronetLoader.kt

@@ -54,6 +54,7 @@ object CronetLoader : CronetEngine.Builder.LibraryLoader() {
     /**
      * 判断Cronet是否安装完成
      */
+    @Synchronized
     fun install(): Boolean {
         if (cacheInstall) {
             return true

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

@@ -1,5 +1,7 @@
 package io.legado.app.utils
 
+import java.io.IOException
+
 val Throwable.msg: String
     get() {
         val stackTrace = stackTraceToString()
@@ -8,4 +10,10 @@ val Throwable.msg: String
             stackTrace.isNotEmpty() -> stackTrace
             else -> lMsg
         }
-    }
+    }
+
+fun Throwable.rethrowAsIOException(): IOException {
+    val newException = IOException(this.message)
+    newException.initCause(this)
+    throw newException
+}