Android 5.0(API 21)调用API时出现UnknownHostException问题求助

问题拆解 #

1. 图形方法警告（非功能性问题） #

日志中出现的VectorDrawableCompat.updateTintFilter方法警告，是AppCompat库的兼容提示，仅在Android 4.1以下系统会引发实际问题，Android 5设备上属于无害提示，不会影响功能运行。若要消除警告，可升级AppCompat库至最新稳定版本。

2. 核心网络错误：DNS解析失败 #

日志反复抛出UnknownHostException，无法解析域名f78bc3d7.api.splkmobile.com，这是导致API调用失败的直接原因，以下是针对性排查和解决步骤：

详细解决步骤 #

• 确认网络权限配置
  检查AndroidManifest.xml中是否添加了必要权限：

  <uses-permission android:name="android.permission.INTERNET" />
  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
  

• 验证DNS可用性

  • 切换设备网络（WiFi/移动数据）后重试，排查是否为当前网络的DNS服务故障
  • 手动设置公共DNS（如8.8.8.8、114.114.114.114），测试域名是否能正常解析

• 升级网络库版本
  当前使用的是系统内置的OkHttp（com.android.okhttp），Android 5内置版本对现代DNS、HTTPS特性支持有限。建议替换为独立的OkHttp库：

  • Android 5支持的最高OkHttp版本为3.12.x（4.x及以上版本要求Android 7+），在build.gradle中添加依赖：

    implementation 'com.squareup.okhttp3:okhttp:3.12.13'
    

• 强制IPv4解析
  若域名仅配置了IPv6记录，而Android 5设备或当前网络不支持IPv6，可强制OkHttp使用IPv4：

  OkHttpClient client = new OkHttpClient.Builder()
      .dns(hostname -> {
          List<InetAddress> addresses = InetAddress.getAllByName(hostname);
          List<InetAddress> ipv4Addresses = new ArrayList<>();
          for (InetAddress addr : addresses) {
              if (addr instanceof Inet4Address) {
                  ipv4Addresses.add(addr);
              }
          }
          return ipv4Addresses.isEmpty() ? addresses : ipv4Addresses;
      })
      .build();
  

• 检查Splunk Mint兼容性
  错误由Splunk Mint的NetSender类抛出，确认当前使用的Splunk Mint SDK版本是否兼容Android 5：

  • 尝试升级至SDK的最新兼容版本
  • 临时禁用Splunk Mint的异常上报，验证核心API调用是否正常，排除SDK本身的问题

• 添加重试机制
  针对DNS解析失败的场景，给网络请求添加重试逻辑，例如使用OkHttp的拦截器：

  public class RetryInterceptor implements Interceptor {
      private static final int MAX_RETRIES = 3;
  
      @Override
      public Response intercept(Chain chain) throws IOException {
          Request request = chain.request();
          IOException lastException = null;
  
          for (int i = 0; i < MAX_RETRIES; i++) {
              try {
                  return chain.proceed(request);
              } catch (UnknownHostException e) {
                  lastException = e;
                  // 等待1秒后重试
                  try {
                      Thread.sleep(1000);
                  } catch (InterruptedException ignored) {}
              }
          }
          throw lastException;
      }
  }
  
  // 添加到OkHttpClient
  OkHttpClient client = new OkHttpClient.Builder()
      .addInterceptor(new RetryInterceptor())
      .build();
  

原始错误日志 #

主日志 #

Before Android 4.1, method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
2022-10-19 10:23:48.519 4653-4716/com.app E/Mint: NetSender: Transmitting Exception Unable to resolve host "f78bc3d7.api.splkmobile.com": No address associated with hostname
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err: java.net.UnknownHostException: Unable to resolve host "f78bc3d7.api.splkmobile.com": No address associated with hostname
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at java.net.InetAddress.lookupHostByName(InetAddress.java:457)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at java.net.InetAddress.getAllByName(InetAddress.java:215)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.HostResolver$1.getAllByName(HostResolver.java:29)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:232)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:124)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:272)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:373)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106)
2022-10-19 10:23:48.519 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:208)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.DelegatingHttpsURLConnection.getOutputStream(DelegatingHttpsURLConnection.java:218)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at com.android.okhttp.internal.http.HttpsURLConnectionImpl.getOutputStream(HttpsURLConnectionImpl.java:25)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at com.splunk.mint.NetSender.sendBlocking(NetSender.java:99)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at com.splunk.mint.ActionEvent.send(ActionEvent.java:101)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at com.splunk.mint.Mint$2.run(Mint.java:189)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at java.lang.Thread.run(Thread.java:818)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err: Caused by: android.system.GaiException: android_getaddrinfo failed: EAI_NODATA (No address associated with hostname)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at libcore.io.Posix.android_getaddrinfo(Native Method)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at libcore.io.ForwardingOs.android_getaddrinfo(ForwardingOs.java:55)
2022-10-19 10:23:48.520 4653-4716/com.app W/System.err:     at java.net.InetAddress.lookupHostByName(InetAddress.java:438)

额外日志 #

java.net.UnknownHostException: Unable to resolve host 
"f78bc3d7.api.splkmobile.com": No address associated with hostname
2022-10-20 08:50:16.207 4711-4774/com.ap W/System.err: at 
java.net.InetAddress.lookupHostByName(InetAddress.java:457)
2022-10-20 08:50:16.207 4711-4774/com.ap W/System.err: at 
java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
2022-10-20 08:50:16.207 4711-4774/com.ap W/System.err: at 
java.net.InetAddress.getAllByName(InetAddress.java:215)
2022-10-20 08:50:16.207 4711-4774/com.ap W/System.err: at com.android.okhttp.HostResolver$1.getAllByName(HostResolver.java:29)
2022-10-20 08:50:16.207 4711-4774/com.ap W/System.err: at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:232)

内容的提问来源于stack exchange，提问作者Om Infowave Developers