优化

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

@@ -18,7 +18,7 @@ import java.util.concurrent.Executors
 
 val executor: ExecutorService by lazy { Executors.newCachedThreadPool() }
 
-val cronetEngine: ExperimentalCronetEngine by lazy {
+val cronetEngine: ExperimentalCronetEngine? by lazy {
     if (AppConfig.isGooglePlay) {
         CronetProviderInstaller.installProvider(appCtx)
     } else {
@@ -35,18 +35,22 @@ val cronetEngine: ExperimentalCronetEngine by lazy {
         enablePublicKeyPinningBypassForLocalTrustAnchors(true)
         enableBrotli(true)//Brotli压缩
     }
+    try {
         val engine = builder.build()
         Timber.d("Cronet Version:" + engine.versionString)
         //这会导致Jsoup的网络请求出现问题，暂时不接管系统URL
         //URL.setURLStreamHandlerFactory(CronetURLStreamHandlerFactory(engine))
         return@lazy engine
+    } catch (e: Exception) {
+        return@lazy null
+    }
 }
 
-fun buildRequest(request: Request, callback: UrlRequest.Callback): UrlRequest {
+fun buildRequest(request: Request, callback: UrlRequest.Callback): UrlRequest? {
     val url = request.url.toString()
     val headers: Headers = request.headers
     val requestBody = request.body
-    return cronetEngine.newUrlRequestBuilder(url, callback, executor).apply {
+    return cronetEngine?.newUrlRequestBuilder(url, callback, executor)?.apply {
         setHttpMethod(request.method)//设置
         allowDirectExecutor()
         headers.forEachIndexed { index, _ ->
@@ -68,7 +72,7 @@ fun buildRequest(request: Request, callback: UrlRequest.Callback): UrlRequest {
 
         }
 
-    }.build()
+    }?.build()
 
 }
 

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

@@ -23,13 +23,16 @@ class CronetInterceptor(private val cookieJar: CookieJar?) : Interceptor {
                 builder.header("Cookie", cookieStr)
             }
             val new = builder.build()
-            val response: Response = proceedWithCronet(new, chain.call())
+            proceedWithCronet(new, chain.call())?.let { response ->
                 //从Response 中保存Cookie到CookieJar
                 cookieJar?.saveFromResponse(new.url, Cookie.parseAll(new.url, response.headers))
                 response
+            } ?: chain.proceed(original)
         } catch (e: Exception) {
             //遇到Cronet处理有问题时的情况，如证书过期等等，回退到okhttp处理
-            if (e.message.toString().contains("ERR_CERT_", true)||e.message.toString().contains("ERR_SSL_",true)) {
+            if (e.message.toString().contains("ERR_CERT_", true)
+                || e.message.toString().contains("ERR_SSL_", true)
+            ) {
                 chain.proceed(original)
             } else {
                 throw e
@@ -41,12 +44,13 @@ class CronetInterceptor(private val cookieJar: CookieJar?) : Interceptor {
     }
 
     @Throws(IOException::class)
-    private fun proceedWithCronet(request: Request, call: Call): Response {
-
+    private fun proceedWithCronet(request: Request, call: Call): Response? {
         val callback = CronetRequestCallback(request, call)
-        val urlRequest = buildRequest(request, callback)
-        urlRequest.start()
-        return callback.waitForDone(urlRequest)
+        buildRequest(request, callback)?.let {
+            it.start()
+            return callback.waitForDone(it)
+        }
+        return null
     }
 
     private fun getCookie(url: HttpUrl): String {