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java.lang.NoClassDefFoundError retrofit2.Utils

由 南笙酒味 提交于 2019-11-30 07:13:36

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

user1140237

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

Muhammad Ahmed Ali Baig

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

Did you add the following proguard rules?

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

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

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());
            }

        });
    }

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();

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

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'

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.

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.

标签
android
retrofit
retrofit2
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