java.lang.NoClassDefFoundError retrofit2.Utils

问题:

I'm using Retrofit to handle the Serverside Data from Mobile. After Implementing retrofit, I am Getting the below Exception.

What am I doing wrong?

com.name.App_idea W/System.err: java.lang.NoClassDefFoundError: retrofit2.Utils at retrofit2.Retrofit$Builder.baseUrl(Retrofit.java:434) at com.name.App_idea.utils.Idea.onCreate(Idea.java:103) at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1007) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4541) at android.app.ActivityThread.access$1500(ActivityThread.java:151) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1381) at android.os.Handler.dispatchMessage(Handler.java:110) at android.os.Looper.loop(Looper.java:193) at android.app.ActivityThread.main(ActivityThread.java:5292) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:824) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:640) at dalvik.system.NativeStart.main(Native Method)

Retrofit Init

mRetrofit = new Retrofit.Builder()
                    .baseUrl(AppConstance.APP_URL)
                    .addConverterFactory(ScalarsConverterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(getOkHttpClient())
                    .build();

Gradle file

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion '23.0.3'

    defaultConfig {
        applicationId "com.name.App_idea"
        minSdkVersion 14
        targetSdkVersion 23
        versionCode 1
        versionName "9"
        multiDexEnabled true


    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.3.0'
    compile 'com.squareup.retrofit2:retrofit:2.0.2'
    compile 'com.squareup.retrofit2:converter-scalars:2.0.0'
    compile 'com.google.code.gson:gson:2.2.4'
    compile 'com.squareup.retrofit2:converter-gson:2.0.0'
    compile 'com.jakewharton:butterknife:7.0.1'
    compile 'com.android.support:design:23.3.0'
    compile 'com.android.support:cardview-v7:23.3.0'
    compile 'com.google.android.gms:play-services:8.4.0'
    compile 'com.squareup.okhttp3:okhttp:3.2.0'
    compile 'com.squareup.okhttp3:okhttp-urlconnection:3.2.0'
    compile 'com.android.support:support-v4:23.3.0'
}

Application Class

import android.app.Application;
import android.content.Context;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.os.Environment;
import android.support.multidex.MultiDex;
import android.util.Log;

import java.io.File;
import java.security.cert.CertificateException;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.SSLSocketFactory;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import okhttp3.OkHttpClient;
import retrofit2.Retrofit;
import retrofit2.converter.scalars.ScalarsConverterFactory;
import retrofit2.converter.gson.GsonConverterFactory;


public class Idea extends Application {
    public static Retrofit mRetrofit;
    public static IdeaService Iservice;


    public static LoginResponceModel loinResponce;
    public static SettingsModel settingModel;

    public static LocationModel location = new LocationModel();

    private static SQLiteDatabase dbase;
    private static String FILE_PATH;

    public static SQLiteDatabase getDataBase() {
        return dbase;
    }

    public static String getFilePath() {
        return FILE_PATH;
    }

    private static class DatabaseHelper extends SQLiteOpenHelper {
        DatabaseHelper(Context context) {
            super(context, "App", null, 1);
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            db.execSQL(AppConstance.DbConstans.tblLogin);
            Log.i("DB", "Created");
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
            onCreate(db);
        }
    }

    public static void deleteAllTables() {
        getDataBase().execSQL("DELETE FROM login");
    }

    @Override
    public void onCreate() {
        super.onCreate();
        try {
            mRetrofit = new Retrofit.Builder()
                    .baseUrl(AppConstance.APP_URL)
                    .addConverterFactory(ScalarsConverterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(getOkHttpClient())
                    .build();
            Iservice = mRetrofit.create(IdeaService.class);
            MultiDex.install(this);
            DatabaseHelper dbHelper = new DatabaseHelper(this);
            dbase = dbHelper.getWritableDatabase();

            AppDataService appDataService = new AppDataService();
            loinResponce = appDataService.getLoginDetails();
            settingModel = appDataService.getSettings();

            FILE_PATH = getAppFilePath();
            startService(new Intent(Idea.this, LocationTracker.class));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public String combineFilePath(String path1, String path2) {
        File file1 = new File(path1);
        File file2 = new File(file1, path2);
        return file2.getPath();
    }

    public String getAppFilePath() {

        String dsPath;
        if (Environment.getExternalStorageState().equals(
                Environment.MEDIA_MOUNTED))
            dsPath = combineFilePath(Environment
                            .getExternalStorageDirectory().getAbsolutePath(),
                    "android/data/Idea/");
        else
            dsPath = this.getDir(
                    this.getPackageName(), 0).getAbsolutePath();

        new File(dsPath).mkdirs();
        return dsPath;
    }

    private OkHttpClient getOkHttpClient() {
        try {
            // Create a trust manager that does not validate certificate chains
            final TrustManager[] trustAllCerts = new TrustManager[]{
                    new X509TrustManager() {
                        @Override
                        public void checkClientTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public void checkServerTrusted(java.security.cert.X509Certificate[] chain, String authType) throws CertificateException {
                        }

                        @Override
                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                            return new java.security.cert.X509Certificate[]{};
                        }
                    }
            };
            // Install the all-trusting trust manager
            final SSLContext sslContext = SSLContext.getInstance("SSL");
            sslContext.init(null, trustAllCerts, new java.security.SecureRandom());
            // Create an ssl socket factory with our all-trusting manager
            final SSLSocketFactory sslSocketFactory = sslContext.getSocketFactory();
            OkHttpClient.Builder builder = new OkHttpClient.Builder();
            builder.sslSocketFactory(sslSocketFactory);
            builder.hostnameVerifier(new HostnameVerifier() {
                @Override
                public boolean verify(String hostname, SSLSession session) {
                    return true;
                }
            });

            OkHttpClient okHttpClient = builder.build();
            return okHttpClient;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}

回答1:

It's Gradle bulid configure issue i also got same issue Some times

In Gradle your using

compile 'com.google.android.gms:play-services:8.4.0'

Enire Google Playservice Lib can you change into which are the lib's using in your project

Example

com.google.android.gms:play-services-gcm:8.4.0 
com.google.android.gms:play-services-maps:8.4.0
com.google.android.gms:play-services-auth:8.4.0

Refer This URl https://developers.google.com/android/guides/setup#add_google_play_services_to_your_project

回答2:

This error will come because of MultiDexApplication .I have face this kind of issue with some other library not same library but some other library.It will error of the retrofit library because its initialization of app start up where dex(in which your retrofit library code is converted to dex) file is not to set(install).

To resolve that you need to handle Multiple Dex file. with the help of application build.gradle & Application class

below changes which is required in build.gradle file

dexOptions {
        incremental true
        // here heap size give 4g i got this thing from https://groups.google.com/forum/#!topic/adt-dev/P_TLBTyFWVY

        javaMaxHeapSize "4g"
    }


dependencies {
     compile 'com.android.support:multidex:1.0.1'
    //    your dependencies which you are using.

}

entire build.gradle

android {
    signingConfigs {
        /*
        releasebuild {
            keyAlias 'hellotest'
            keyPassword 'hellotest'
            storeFile file('path to keystore')
            storePassword 'hellotest'
        }
        */
    }
    compileSdkVersion 'Google Inc.:Google APIs:22'
    buildToolsVersion '23.0.0'
    /* if you got error regarding duplicate file of  META-INF/LICENSE.txt from jar file
    packagingOptions {
        exclude 'META-INF/LICENSE.txt'
    }
    */
    dexOptions {
        jumboMode = true
        incremental true
        // here heap size give 4g i got this thing from https://groups.google.com/forum/#!topic/adt-dev/P_TLBTyFWVY

        javaMaxHeapSize "4g"
    }
    defaultConfig {
        multiDexEnabled true
        applicationId "com.myapp.packagenme"
        minSdkVersion 17
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.releasebuild
        }
        debug {
            signingConfig signingConfigs.releasebuild
        }
    }
}

dependencies {
     compile 'com.android.support:multidex:1.0.1'
    //    your dependencies which you are using.

}

If your app uses extends the Applicationclass, you can override the attachBaseContext() method and call MultiDex.install(this) to enable multidex. To install multipledex file context using Applicaiton class which should extends [MultiDexApplication][2]

public class MyAppClass extends MultiDexApplication{
@Override
    protected void attachBaseContext(Context newBase) {
        MultiDex.install(newBase);
        super.attachBaseContext(newBase);
    }
}

Suggestion

Selectively compiling APIs into your executable

Don't use entire google play service use only required library.From version 6.5, you can instead selectively compile Google Play service APIs into your app. For example, to include only the Google Fit and Android Wear APIs, replace the following line in your build.gradle file:

compile 'com.google.android.gms:play-services:8.4.0'

with these lines:

compile 'com.google.android.gms:play-services-fitness:8.4.0'
compile 'com.google.android.gms:play-services-wearable:8.4.0'

With the reference of my answer https://stackoverflow.com/a/34948154/1140237

回答3:

I was facing this error below lollipop devices.

I was using multiDexEnabled true.

After adding this code to the class extending Application class my issue solved.

@Override
protected void attachBaseContext(Context context) {
    super.attachBaseContext(context);
    MultiDex.install(this);
}

reference: https://stackoverflow.com/a/39968486/4777524

回答4:

Did you add the following proguard rules?

-dontwarn retrofit2.**
-keep class retrofit2.** { *; }
-keepattributes Signature
-keepattributes Exceptions

Documentation: http://square.github.io/retrofit/

回答5:

You should make Utils class like this:

public class AppUtil{
public static Retrofit getRetrofitInstance(){
        HttpLoggingInterceptor logging=new HttpLoggingInterceptor();
        if(isEnableLogging)
            logging.setLevel(HttpLoggingInterceptor.Level.BODY);
        else
            logging.setLevel(HttpLoggingInterceptor.Level.NONE);
        Gson gson = new GsonBuilder()
                .setExclusionStrategies(new ExclusionStrategy() {
                    @Override
                    public boolean shouldSkipField(FieldAttributes f) {
                        return f.getDeclaringClass().equals(RealmObject.class);
                    }

                    @Override
                    public boolean shouldSkipClass(Class<?> clazz) {
                        return false;
                    }
                })
                .create();
        OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
        httpClient.addInterceptor(logging);

        return new Retrofit.Builder()
                .baseUrl(Constants.URL_BASE_URL)
                .addConverterFactory(GsonConverterFactory.create(gson))
                .client(httpClient.build())
                .build();

    }



}

Create an interface like this for the http methods:

public interface EndPointInterface{
 @FormUrlEncoded
    @POST(Constants.URL_LOGON)
    Call<Doctor> login(@Field(Constants.EMAIL) String email,
                       @Field(Constants.PASSWORD) String password);
} 

In your activity where you are calling the webservices,please proceed like this:

 @OnClick(R.id.btn_login)
    public void onLoginButtonClick() {
        String emailString = edtEmail.getText().toString().trim();
        String passwordString = edtPassword.getText().toString().trim();

        if (emailString.length() == 0) {
            emailWrapper.setError("Please enter E-Mail ID");
        } else if (!AppUtil.isEmailValid(emailString)) {
            emailWrapper.setError("Please enter valid E-Mail ID");
        } else if (passwordString.length() == 0) {
            passwordWrapper.setError("Please enter password");
        } else if (AppUtil.isNetworkConnectionAvailable(this, true)) {
            login(emailString,passwordString);
        }
    }

 private void login(String email, String pwd) {
        final MaterialDialog dialog = AppUtil.showIndeterminateProgressDialog(this,getString(R.string.please_wait));
        EndPointInterface apiService = AppUtil.getRetrofitInstance().create(EndPointInterface.class);
        Call<Doctor> call = apiService.login(email, pwd);
        call.enqueue(new Callback<Doctor>() {
            @Override
            public void onResponse(Call<Doctor> call, Response<Doctor> response) {
                dialog.dismiss();
                if (response.code() == 200) {
                    Doctor doctor = response.body();
                    if (doctor == null) {
                        AppUtil.showSimpleDialog(LoginActivity.this, getString(R.string.userid_pwd_mismatched),
                                getString(R.string.login_credential_mismatch));
                    } else {
                        SharedPreferences.Editor editor = mAppPreferences.edit();
                        editor.putString(Constants.SETTINGS_OBJ_DOCTOR, new Gson().toJson(doctor));
                        editor.putBoolean(Constants.SETTINGS_IS_LOGGED_IN, true);
                        editor.commit();

                        startActivity(new Intent(LoginActivity.this, PatientSummaryInfoActivity.class));
                        finish();
                    }
                } else {
                    dialog.dismiss();
                    AppUtil.showSimpleDialog(LoginActivity.this, getString(R.string.server_error),
                            getString(R.string.could_not_connect_to_server));
                }

            }

            @Override
            public void onFailure(Call<Doctor> call, Throwable t) {
                dialog.dismiss();
                AppUtil.showSimpleDialog(LoginActivity.this,getString(R.string.server_error), t.getMessage());
            }

        });
    }

回答6:

mRetrofit = new Retrofit.Builder()
                    .baseUrl(AppConstance.APP_URL)
                    .addConverterFactory(ScalarsConverterFactory.create())
                    .addConverterFactory(GsonConverterFactory.create())
                    .client(getOkHttpClient())
                    .build();

REWRITE TO

OkHttpClient.Builder httpClient = new OkHttpClient.Builder();
mRetrofit = new Retrofit.Builder()
                        .baseUrl(AppConstance.APP_URL)
                        .addConverterFactory(GsonConverterFactory.create())
                        .client(httpClient)
                        .build();

回答7:

With these many library saddles up, it must have exceded the infamous 64k method limit, you need to enable your app for multidex. Here is how you do it. https://developer.android.com/tools/building/multidex.html

回答8:

Try using the same lib version for base retrofit lib and the converters.

compile 'com.squareup.retrofit2:retrofit:2.0.2'
compile 'com.squareup.retrofit2:converter-scalars:2.0.2'
compile 'com.squareup.retrofit2:converter-gson:2.0.2'

回答9:

I ran into similar issues like this, it's probably a dependency issue

compile 'com.squareup.retrofit2:retrofit:2.0.2'

already includes okhttp as seen here https://github.com/square/retrofit/blob/d04f3a50e41ca01d22f370ac4f332f6ddf4ba9fe/pom.xml, therefore remove the okhttp from the dependency list then sync and try again.

回答10:

I encountered with this error. And after many search, found that I forget add Internet Permission to manifest.

After adding this permission, my error, resolved.