Question

我正在尝试从YouTube api获取数据，但是当我使用httpclient创建asyctask对象时，出现了NoClassDefFoundError错误。为什么会发生此错误？

    import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Adapter;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;

import com.google.android.youtube.player.YouTubeBaseActivity;
import com.google.android.youtube.player.YouTubeInitializationResult;
import com.google.android.youtube.player.YouTubePlayer;
import com.google.android.youtube.player.YouTubePlayerView;
import com.google.android.youtube.player.YouTubeStandalonePlayer;

import org.apache.http.HttpEntity;
import org.apache.http.HttpRequest;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.json.JSONObject;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.ListIterator;

public class MainActivity extends YouTubeBaseActivity {

    private static final String TAG="MainActivity";

    private static String urll="https://www.googleapis.com/youtube/v3/" +
            "videos?part=snippet%2CcontentDetails%2Cstatistics&id=Ks-_Mh1QhMc&key="+YouTubeConfig.getApiKey()+" HTTP/1.1";

    YouTubePlayerView player;
    YouTubePlayer.OnInitializedListener playerInitializer;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ArrayList<String> a= new ArrayList<>();
        for (int x =0; x<100;x++ ){
            a.add(String.valueOf(x));
        }

        ListView lv= findViewById(R.id.izlenecekVideolar);
        ArrayAdapter<String> veriAdaptoru=new ArrayAdapter<String>
                (this, android.R.layout.simple_list_item_1, android.R.id.text1, a);
        lv.setAdapter(veriAdaptoru);
        player = (YouTubePlayerView) findViewById(R.id.youtubeView);
        int d = Log.d(TAG, "onCreate: ");


        new GetYoutube().execute();
        player.initialize(YouTubeConfig.getApiKey(),new YouTubePlayer.OnInitializedListener() {

                    @Override
                    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean b) {
                        List<String> izle=new ArrayList<>();
                        izle.add("W4hTJybfU7s");
                        izle.add("co1T0ue8zD8");
                        youTubePlayer.loadVideos(izle);
                        Log.d(TAG, "onInitializationSuccess: ");
                        youTubePlayer.setPlayerStyle(YouTubePlayer.PlayerStyle.MINIMAL);
                    }

                    @Override
                    public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInitializationResult youTubeInitializationResult) {
                        Log.d(TAG, "onInitializationFailure: ");
                    }
                }
        );

        Log.d(TAG, "onCreate:initialized ");
    }

    private static class GetYoutube extends AsyncTask<Void,String, String> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected String doInBackground(Void... voids) {
            HttpClient hc=new DefaultHttpClient();
            HttpGet hget=new HttpGet(urll);
            try {
                HttpResponse response =hc.execute(hget);
                HttpEntity he= response.getEntity();
                String json= EntityUtils.toString(he);
                return json;


            }
            catch (Exception e){
                e.printStackTrace();
            }

            return null;
        }

        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);

            if (s != null)
            {
                try {
                    JSONObject jse=new JSONObject(s);
                    Log.e("response",jse.toString());
                }
                catch (Exception e){

                    e.printStackTrace();
                }

            }

        }
    }
}

LOGCAT

2019-07-27 01：49：22.162 21763-21763 / com.gamedu.yourchild E / Android运行时：致命异常：主要流程：com.gamedu.yourchild，PID：21763 java.lang.NoClassDefFoundError：无法解决以下问题：Lorg / apache / commons / logging / LogFactory; 在org.apache.http.impl.client.AbstractHttpClient。（AbstractHttpClient.java:182）在org.apache.http.impl.client.DefaultHttpClient。（DefaultHttpClient.java:150）在com.gamedu.yourchild.MainActivity.onCreate（MainActivity.java:68）在android.app.Activity.performCreate（Activity.java:7698）在android.app.Activity.performCreate（Activity.java:7687）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1299）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:3096）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3257）在android.app.servertransaction.LaunchActivityItem.execute（LaunchActivityItem.java:81）在android.app.servertransaction.TransactionExecutor.executeCallbacks（TransactionExecutor.java:135）在android.app.servertransaction.TransactionExecutor.execute（TransactionExecutor.java:95）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1935）在android.os.Handler.dispatchMessage（Handler.java:107）在android.os.Looper.loop（Looper.java:214）在android.app.ActivityThread.main（ActivityThread.java:7116）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:492）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:925）由以下原因引起：java.lang.ClassNotFoundException：在路径：DexPathList上找不到类“ org.apache.commons.logging.LogFactory”。[[zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/base .apk”，zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_dependencies_apk.apk”、zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJ_g_ap_k_ap_k_ap_k_ap_kap_k_ap_k_aps_ap_k_ap_kap_k_ap_k_ap_k_ap_kap_k_ap_kap_k_ap_kap_k_ap_kap_k_ap_kap_kap_kap_k_ap_kap_kap_k_ap_kap_k_ap_kap_k_ap_kap_kap_kap_k_ap_kap_kap_k_ap_kap_k_aps_k_ap_k_aps_k_aps_k_ap是“ .apk”，zip文件“ /。 zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_slice_0_apk.apk”、zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==//“sp__ap_lib”数据/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_slice_2_apk.apk”、zip文件“ /data/app/com/game.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==//split_lib_slice_3”。 com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg == / split_lib_slice_4_apk.apk“，zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_slice_app.com.5k”你的d-Cf8th6YAffTJoMT1j3NJUg == / split_lib_slice_6_apk.apk“，zip文件” /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_slice_7_apk/app6/data6/apf.appk/kTy/app-y/kTy/app-y.3k/apk.apk“。 = / split_lib_slice_8_apk.apk“，zip文件“ /data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_slice_9_apk.apk”]，nativeLibraryDirectories=[/data/app/J/NffU=6 / x86，/ system / lib，/ system / product / lib]] 在dalvik.system.BaseDexClassLoader.findClass（BaseDexClassLoader.java:196）在java.lang.ClassLoader.loadClass（ClassLoader.java:379）在java.lang.ClassLoader.loadClass（ClassLoader.java:312）在org.apache.http.impl.client.AbstractHttpClient。（AbstractHttpClient.java:182）在org.apache.http.impl.client.DefaultHttpClient。（DefaultHttpClient.java:150）在com.gamedu.yourchild.MainActivity.onCreate（MainActivity.java:68）在android.app.Activity.performCreate（Activity.java:7698）在android.app.Activity.performCreate（Activity.java:7687）在android.app.Instrumentation.callActivityOnCreate（Instrumentation.java:1299）在android.app.ActivityThread.performLaunchActivity（ActivityThread.java:3096）在android.app.ActivityThread.handleLaunchActivity（ActivityThread.java:3257）在android.app.servertransaction.LaunchActivityItem.execute（LaunchActivityItem.java:81）在android.app.servertransaction.TransactionExecutor.executeCallbacks（TransactionExecutor.java:135）在android.app.servertransaction.TransactionExecutor.execute（TransactionExecutor.java:95）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1935）在android.os.Handler.dispatchMessage（Handler.java:107）在android.os.Looper.loop（Looper.java:214）在android.app.ActivityThread.main（ActivityThread.java:7116）在java.lang.reflect.Method.invoke（本机方法）在com.android.internal.os.RuntimeInit $ MethodAndArgsCaller.run（RuntimeInit.java:492）在com.android.internal.os.ZygoteInit.main（ZygoteInit.java:925）禁止：java.io.IOException：找不到用于dex位置/data/app/com.gamedu.yourchild-Cf8th6YAffTJoMT1j3NJUg==/split_lib_resources_apk.apk的原始dex文件在dalvik.system.DexFile.openDexFileNative（本机方法）在dalvik.system.DexFile.openDexFile（DexFile.java:365）在dalvik.system.DexFile。（DexFile.java:107）在dalvik.system.DexFile。（DexFile.java:80）在dalvik.system.DexPathList.loadDexFile（DexPathList.java:444）在dalvik.system.DexPathList.makeDexElements（DexPathList.java:403）在dalvik.system.DexPathList。（DexPathList.java:164）在dalvik.system.BaseDexClassLoader。（BaseDexClassLoader.java:126）在dalvik.system.BaseDexClassLoader。（BaseDexClassLoader.java:101）在dalvik.system.PathClassLoader。（PathClassLoader.java:74） 2019-07-27 01：49：22.163 21763-21763 / com.gamedu.yourchild E / AndroidRuntime：在com.android.internal.os.ClassLoaderFactory.createClassLoader（ClassLoaderFactory.java:87）在com.android.internal.os.ClassLoaderFactory.createClassLoader（ClassLoaderFactory.java:116）在android.app.ApplicationLoaders.getClassLoader（ApplicationLoaders.java:114）在android.app.ApplicationLoaders.getClassLoaderWithSharedLibraries（ApplicationLoaders.java:60）在android.app.LoadedApk.createOrUpdateClassLoaderLocked（LoadedApk.java:861）在android.app.LoadedApk.getClassLoader（LoadedApk.java:958）在android.app.LoadedApk.getResources（LoadedApk.java:1196）在android.app.ContextImpl.createAppContext（ContextImpl.java:2462）在android.app.ContextImpl.createAppContext（ContextImpl.java:2454）在android.app.ActivityThread.handleBindApplication（ActivityThread.java:6105）在android.app.ActivityThread.access $ 1100（ActivityThread.java:211）在android.app.ActivityThread $ H.handleMessage（ActivityThread.java:1778）

Answer 1

首先，这类错误通常不是编码错误，而是因为基本APK中的某些损坏文件可以从logcat中清楚地看到。请参阅 ClassLoader 无法从基本apk文件中加载特定的类，因此发生致命异常 ClassNotFound 。

解决方案： 基本上，这不是一个确定的解决方案，但值得一试。我遇到了类似的问题，在搜索了很多之后，我发现的唯一合理的解决方案是删除所有数据，然后从设备上卸载该应用程序，然后重新安装它。不过，这不是一个确定的解决方案。

尝试创建httpclient对象，但发生NoClassDefFoundError错误

1 个答案: