Cronet:修复在断网条件下会因为获取不到md5,导致md5不匹配而删除已下载的so

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

@@ -6,6 +6,8 @@ import android.content.pm.ApplicationInfo
 import android.os.Build
 import android.text.TextUtils
 import android.util.Log
+import io.legado.app.utils.getPrefString
+import io.legado.app.utils.putPrefString
 import org.chromium.net.CronetEngine
 import org.chromium.net.impl.ImplVersion
 import splitties.init.appCtx
@@ -28,7 +30,8 @@ object CronetLoader : CronetEngine.Builder.LibraryLoader() {
     private val soFile: File
     private val downloadFile: File
     private var cpuAbi: String? = null
-    private var md5: String? = null
+    private var md5: String? = appCtx.getPrefString("soMd5")
+    private val version: String? = appCtx.getPrefString("soVersion", ImplVersion.getCronetVersion())
     var download = false
     private var executor: Executor = Executors.newSingleThreadExecutor()
 
@@ -54,7 +57,7 @@ object CronetLoader : CronetEngine.Builder.LibraryLoader() {
     }
 
     fun preDownload() {
-        Thread {
+        executor.execute {
             md5 = getUrlMd5(md5Url)
             if (soFile.exists() && md5 == getFileMD5(soFile)) {
                 Log.e(TAG, "So 库已存在")
@@ -62,7 +65,8 @@ object CronetLoader : CronetEngine.Builder.LibraryLoader() {
                 download(soUrl, md5, downloadFile, soFile)
             }
             Log.e(TAG, soName)
-        }.start()
+
+        }
     }
 
     @SuppressLint("UnsafeDynamicallyLoadedCode")
@@ -136,14 +140,15 @@ object CronetLoader : CronetEngine.Builder.LibraryLoader() {
         if (TextUtils.isEmpty(cpuAbi)) {
             cpuAbi = Build.SUPPORTED_ABIS[0]
         }
-
-        //貌似只有这个过时了的API能获取当前APP使用的ABI
         return cpuAbi
     }
 
     @Suppress("SameParameterValue")
     private fun getUrlMd5(url: String): String? {
-        if (md5 != null && md5!!.length == 32) {
+        //这样在下载成功后，遇到无网条件下，只要版本未发生变化也能获取md5
+        if (md5 != null && md5!!.length == 32&& version==ImplVersion.getCronetVersion()) {
+            appCtx.putPrefString("soMd5",md5)
+            appCtx.putPrefString("soVersion",ImplVersion.getCronetVersion())
             return md5
         }
         val inputStream: InputStream
@@ -158,7 +163,15 @@ object CronetLoader : CronetEngine.Builder.LibraryLoader() {
                 outputStream.write(buffer, 0, read)
                 outputStream.flush()
             }
-            outputStream.toString()
+            val tmd5=outputStream.toString()
+            //成功获取到md5后保存md5和版本
+            if(tmd5.length==32){
+                appCtx.putPrefString("soMd5",tmd5)
+                appCtx.putPrefString("soVersion",ImplVersion.getCronetVersion())
+            }
+
+            return tmd5
+
         } catch (e: IOException) {
             null
         }