Android9.0使用AndroidVideoCache时不能缓存播放视频的解决

活着的死人

android9.0使用AndroidVideoCache时不能缓存播放视频的解决
一、问题现象：

项目中使用 https://github.com/danikula/AndroidVideoCache 作为视频缓存组件，但是在9.0手机上无法正常缓存，并且报错：

1、详细错误截图

2、详细错误文本描述

1. 2018-11-16 14:35:19.781 31012-32296/com.xxx.xxx E/Pinger: Error reading ping response
   
2.     com.danikula.videocache.ProxyCacheException: Error opening connection for http://127.0.0.1:34851/ping with offset 0. Version: 2.7.0
   
3.         at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:75)
   
4.         at com.danikula.videocache.Pinger.pingServer(Pinger.java:101)
   
5.         at com.danikula.videocache.Pinger.access$100(Pinger.java:33)
   
6.         at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:123)
   
7.         at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:119)
   
8.         at java.util.concurrent.FutureTask.run(FutureTask.java:266)
   
9.         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
   
10.         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    
11.         at java.lang.Thread.run(Thread.java:784)
    
12.      Caused by: java.io.IOException: Cleartext HTTP traffic to 127.0.0.1 not permitted
    
13.         at com.android.okhttp.HttpHandler$CleartextURLFilter.checkURLPermitted(HttpHandler.java:115)
    
14.         at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:458)
    
15.         at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:407)
    
16.         at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getResponseCode(HttpURLConnectionImpl.java:538)
    
17.         at com.danikula.videocache.HttpUrlSource.openConnection(HttpUrlSource.java:160)
    
18.         at com.danikula.videocache.HttpUrlSource.open(HttpUrlSource.java:68)
    
19.         at com.danikula.videocache.Pinger.pingServer(Pinger.java:101)
    
20.         at com.danikula.videocache.Pinger.access$100(Pinger.java:33)
    
21.         at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:123)
    
22.         at com.danikula.videocache.Pinger$PingCallable.call(Pinger.java:119)
    
23.         at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    
24.         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    
25.         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    
26.         at java.lang.Thread.run(Thread.java:784)
    
27. 2018-11-16 14:35:19.783 31012-31012/com.xxx.xxx E/Pinger: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: [DIRECT]
    
28.     com.danikula.videocache.ProxyCacheException: Error pinging server (attempts: 3, max timeout: 280). If you see this message, please, report at https://github.com/danikula/AndroidVideoCache/issues/134. Default proxies are: [DIRECT]. Version: 2.7.0
    
29.         at com.danikula.videocache.Pinger.ping(Pinger.java:73)
    
30.         at com.danikula.videocache.HttpProxyCacheServer.isAlive(HttpProxyCacheServer.java:183)
    
31.         at com.danikula.videocache.HttpProxyCacheServer.<init>(HttpProxyCacheServer.java:82)
    
32.         at com.danikula.videocache.HttpProxyCacheServer.<init>(HttpProxyCacheServer.java:67)
    
33.         at com.xxx.mqtt.tools.CusApplication.newProxy(CusApplication.java:192)
    
34.         at com.xxx.mqtt.tools.CusApplication.getProxy(CusApplication.java:182)
    
35.         at com.xxx.video.activity.VideoPreviewActivity.onCreate(VideoPreviewActivity.java:59)
    
36.         at android.app.Activity.performCreate(Activity.java:7444)
    
37.         at android.app.Activity.performCreate(Activity.java:7434)
    
38.         at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1286)
    
39.         at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3269)
    
40.         at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3474)
    
41.         at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:86)
    
42.         at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
    
43.         at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
    
44.         at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2115)
    
45.         at android.os.Handler.dispatchMessage(Handler.java:109)
    
46.         at android.os.Looper.loop(Looper.java:207)
    
47.         at android.app.ActivityThread.main(ActivityThread.java:7439)
    
48.         at java.lang.reflect.Method.invoke(Native Method)
    
49.         at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
    
50.         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:958)

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二、问题原因：

根本原因是从Android9.0开始，出于完全因素考虑，默认不再支持http网络请求，需要使用 https。

但是，在AndroidVideoCache中使用了一个缓存代理地址：http://127.0.0.1，所以，就会报错。

三、解决方案：

解决的基本思路是：对指定的网址进行过滤，强制允许指定网址继续使用http请求

• 参考地址1：
  https://stackoverflow.com/questi ... ffic-not-permitted- 参考地址2：https://developer.android.com/tr ... xtTrafficPermitted- 参考地址3： https://koz.io/android-m-and-the-war-on-cleartext-traffic/
  
  

下列解决步骤基于参考地址1整理：

1、步骤1A:创建 res/xml/network_security_config.xml

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <network-security-config>
   
3.     <domain-config cleartextTrafficPermitted="true">
   
4.         <domain includeSubdomains="true">Your URL(ex: 127.0.0.1)</domain>
   
5.     </domain-config>
   
6. </network-security-config>

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注意：
上述代码的意思是解除对指定网址的限制。

在解除上述视频缓存库报错信息时，<domain> 节点的具体取值如下：

<domain includeSubdomains="true"> 127.0.0.1</domain>

如果需要过滤某个地址，则只写域名即可，不需要写 http://,如：想过滤的地址为：http://www.662p.com/123，则<demain>节点如下：

<domain includeSubdomains="true"> www.662p.com</domain>B:修改 AndroidManifest.xml

配置 android:networkSecurityConfig

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <manifest ...>
   
3.     <uses-permission android:name="android.permission.INTERNET" />
   
4.     <application
   
5.         ...
   
6.         android:networkSecurityConfig="@xml/network_security_config"
   
7.         ...>
   
8.         ...
   
9.     </application>
   
10. </manifest>

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2、步骤2A：修改AndroidManifest.xml

启用 android:usesCleartextTraffic

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <manifest ...>
   
3.     <uses-permission android:name="android.permission.INTERNET" />
   
4.     <application
   
5.         ...
   
6.         android:usesCleartextTraffic="true"
   
7.         ...>
   
8.         ...
   
9.     </application>
   
10. </manifest>

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3、步骤3

在 @david.s'的回答中指出 android:targetSandboxVersion 也可能会导致该问题 -

在 Manifest Docs https://developer.android.com/gu ... argetSandboxVersion 中对于 android:targetSandboxVersion有如下描述

android:targetSandboxVersion

The target sandbox for this app to use. The higher the sandbox version number, the higher the level of security. Its default value is 1; you can also set it to 2. Setting this attribute to 2 Switches the app to a different SELinux sandbox. The following restrictions apply to a level 2 sandbox:

The default value of usesCleartextTraffic in the Network Security Config is false.
Uid sharing is not permitted.

所以，如果你在 AndroidManifest.xml 的 <manifest> 节点中配置了 android:targetSandboxVersion,需要将它的值置为1.

A:修改AndroidManifest.xml

降低 android:targetSandboxVersion 的版本

1. <?xml version="1.0" encoding="utf-8"?>
   
2. <manifest android:targetSandboxVersion="1">
   
3.     <uses-permission android:name="android.permission.INTERNET" />
   
4.     ...
   
5. </manifest>

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