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我的应用程序出现 NoClassDefFoundError。我正在使用 dnsjava、okhttp3 和改造。我的最小 API 是 19。

我读到 API 26 中添加了 java.time 包。这是否意味着我不能将 dnsjava 用于低于 26 的 Android API？还是其他原因导致此错误（例如proguard）？可以使用较旧的 dnsjava 版本帮助吗？我找不到任何有关 dnsjava 最小 API 的信息。

编辑：我在 dnsjava Github 页面上找到了这个。

从版本 2.1.x 迁移到 v3

不推荐使用使用 java.util.Date 的方法。将新版本与 java.time.Instant 或 java.time.Duration 一起使用

那么这是否意味着我可以使用 2.1.x 版本？

 FATAL EXCEPTION: OkHttp Dispatcher
Process: de.url.myproject, PID: 10723
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/time/Duration;
    at org.xbill.DNS.ExtendedResolver.<clinit>(ExtendedResolver.java)
    at org.xbill.DNS.Lookup.refreshDefault(Lookup.java:1)
    at org.xbill.DNS.Lookup.<clinit>(Lookup.java:1)
    at org.xbill.DNS.Lookup.getDefaultResolver(Lookup.java)
    at de.url.myproject.MyDNS.init(MyDNS.java)
    at de.url.myproject.MyDNS.lookup(MyDNS.java)
    at okhttp3.internal.connection.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:19)
    at okhttp3.internal.connection.RouteSelector.nextProxy(RouteSelector.java:19)
    at okhttp3.internal.connection.RouteSelector.next(RouteSelector.java:19)
    at okhttp3.internal.connection.StreamAllocation.findConnection(StreamAllocation.java:19)
    at okhttp3.internal.connection.StreamAllocation.e(StreamAllocation.java)
    at okhttp3.internal.connection.StreamAllocation.newStream(StreamAllocation.java:10)
    at okhttp3.internal.connection.ConnectInterceptor.intercept(ConnectInterceptor.java:10)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:2)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:103)
    at okhttp3.internal.cache.CacheInterceptor.intercept(CacheInterceptor.java:103)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:2)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:27)
    at okhttp3.internal.http.BridgeInterceptor.intercept(BridgeInterceptor.java:27)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:2)
    at okhttp3.internal.http.RetryAndFollowUpInterceptor.intercept(RetryAndFollowUpInterceptor.java:7)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java:2)
    at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.java)
    at okhttp3.RealCall.getResponseWithInterceptorChain(RealCall.java:12)
    at okhttp3.RealCall$AsyncCall.a(RealCall.java)
    at okhttp3.internal.NamedRunnable.run(NamedRunnable.java)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
    at java.lang.Thread.run(Thread.java:776)
Caused by: java.lang.ClassNotFoundException: Didn't find class "java.time.Duration" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/data/app/androidx.test.tools.crawler-1/base.apk", zip file "/data/app/de.url.myproject-1/base.apk", zip file "/data/app/de.url.myproject-1/split_config.xxhdpi.apk"],nativeLibraryDirectories=[/data/app/androidx.test.tools.crawler-1/lib/arm64, /data/app/de.url.myproject-1/lib/arm64, /system/lib64, /vendor/lib64, /system/vendor/lib64, /product/lib64]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:380)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    ... 22 more
    Suppressed: java.io.IOException: No original dex files found for dex location /data/app/de.url.myproject-1/split_config.xxhdpi.apk
    at dalvik.system.DexFile.openDexFileNative(DexFile.java)
    at dalvik.system.DexFile.openDexFile(DexFile.java:373)
    at dalvik.system.DexFile.<init>(DexFile.java:113)
    at dalvik.system.DexFile.<init>(DexFile.java:78)
    at dalvik.system.DexPathList.loadDexFile(DexPathList.java:359)
    at dalvik.system.DexPathList.makeElements(DexPathList.java:323)
    at dalvik.system.DexPathList.makeDexElements(DexPathList.java:263)
    at dalvik.system.DexPathList.<init>(DexPathList.java:126)
    at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:48)
    at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
    at com.android.internal.os.PathClassLoaderFactory.createClassLoader(PathClassLoaderFactory.java:43)
    at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:58)
    at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:540)
    at android.app.LoadedApk.getClassLoader(LoadedApk.java:573)
    at android.app.ActivityThread.getTopLevelResources(ActivityThread.java:1990)
    at android.app.LoadedApk.getResources(LoadedApk.java:799)
    at android.app.ContextImpl.<init>(ContextImpl.java:2217)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2162)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5547)
    at android.app.ActivityThread.-wrap2(ActivityThread.java)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1637)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:156)
    at android.app.ActivityThread.main(ActivityThread.java:6524)
    at java.lang.reflect.Method.invoke(Method.java)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:941)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:831)

我的代码：

package de.url.myproject;

import android.util.Log;

import androidx.annotation.NonNull;

import org.xbill.DNS.Address;
import org.xbill.DNS.ExtendedResolver;
import org.xbill.DNS.Lookup;
import org.xbill.DNS.Resolver;
import org.xbill.DNS.SimpleResolver;

import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Collections;
import java.util.List;

import okhttp3.Dns;

public class MyDNS implements Dns {

    private static final String LIVE_API_HOST = "api.myproject.de";
    private static final String LIVE_API_IP = "12.345.67.890";

    private boolean mInitialized;
    private InetAddress mLiveApiStaticIpAddress;

    @NonNull
    @Override
    public List<InetAddress> lookup(@NonNull String hostname) throws UnknownHostException {
        // I'm initializing the DNS resolvers here to take advantage of this method being called in a background-thread managed by OkHttp
        init();
        try {
            return Collections.singletonList(Address.getByName(hostname));
        } catch (UnknownHostException e) {
            // fallback to the API's static IP
            if (LIVE_API_HOST.equals(hostname) && mLiveApiStaticIpAddress != null) {
                return Collections.singletonList(mLiveApiStaticIpAddress);
            } else {
                throw e;
            }
        }
    }

    private void init() {
        if (mInitialized) return; else mInitialized = true;

        try {
            mLiveApiStaticIpAddress = InetAddress.getByName(LIVE_API_IP);
        } catch (UnknownHostException e) {
            Log.w("DNS", "Couldn't initialize static IP address");
        }

        try {
            // configure the resolvers, starting with the default ones (based on the current network connection)
            Resolver defaultResolver = Lookup.getDefaultResolver();
            // use Google's public DNS services
            Resolver googleFirstResolver = new SimpleResolver("8.8.8.8");
            Resolver googleSecondResolver = new SimpleResolver("8.8.4.4");
            // also try using Amazon
            Resolver amazonResolver = new SimpleResolver("205.251.198.30");
            Lookup.setDefaultResolver(new ExtendedResolver(new Resolver[]{
                    defaultResolver, googleFirstResolver, googleSecondResolver, amazonResolver}));
        } catch (UnknownHostException e) {
            Log.w("DNS", "Couldn't initialize custom resolvers");
        }
    }

}
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1 回答 1

0

我也遇到了同样的问题，不是我用“minidns”代替的，它对android很友好。

实施 'de.measite.minidns:minidns:0.1.7'

于 2020-12-24T06:49:16.347 回答