Java.lang.noclassdeffounderror Retrofit2.utils
Solution 1:
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]
publicclassMyAppClassextendsMultiDexApplication{
@OverrideprotectedvoidattachBaseContext(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
Solution 2:
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.
@OverrideprotectedvoidattachBaseContext(Context context) {
super.attachBaseContext(context);
MultiDex.install(this);
}
reference: https://stackoverflow.com/a/39968486/4777524
Solution 3:
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:8.4.0com.google.android.gms:play-services-auth:8.4.0Refer This URl https://developers.google.com/android/guides/setup#add_google_play_services_to_your_project
Solution 4:
Did you add the following proguard rules?
-dontwarn retrofit2.**-keep class retrofit2.** { *; }-keepattributes Signature-keepattributes ExceptionsDocumentation: http://square.github.io/retrofit/
Solution 5:
You should make Utils class like this:
publicclassAppUtil{
publicstaticRetrofitgetRetrofitInstance(){
HttpLoggingInterceptor logging=newHttpLoggingInterceptor();
if(isEnableLogging)
logging.setLevel(HttpLoggingInterceptor.Level.BODY);
else
logging.setLevel(HttpLoggingInterceptor.Level.NONE);
Gson gson = newGsonBuilder()
.setExclusionStrategies(newExclusionStrategy() {
@OverridepublicbooleanshouldSkipField(FieldAttributes f) {
return f.getDeclaringClass().equals(RealmObject.class);
}
@OverridepublicbooleanshouldSkipClass(Class<?> clazz) {
returnfalse;
}
})
.create();
OkHttpClient.Builder httpClient = newOkHttpClient.Builder();
httpClient.addInterceptor(logging);
returnnewRetrofit.Builder()
.baseUrl(Constants.URL_BASE_URL)
.addConverterFactory(GsonConverterFactory.create(gson))
.client(httpClient.build())
.build();
}
}
Create an interface like this for the http methods:
publicinterfaceEndPointInterface{
@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)publicvoidonLoginButtonClick() {
StringemailString= edtEmail.getText().toString().trim();
StringpasswordString= edtPassword.getText().toString().trim();
if (emailString.length() == 0) {
emailWrapper.setError("Please enter E-Mail ID");
} elseif (!AppUtil.isEmailValid(emailString)) {
emailWrapper.setError("Please enter valid E-Mail ID");
} elseif (passwordString.length() == 0) {
passwordWrapper.setError("Please enter password");
} elseif (AppUtil.isNetworkConnectionAvailable(this, true)) {
login(emailString,passwordString);
}
}
privatevoidlogin(String email, String pwd) {
finalMaterialDialogdialog= AppUtil.showIndeterminateProgressDialog(this,getString(R.string.please_wait));
EndPointInterfaceapiService= AppUtil.getRetrofitInstance().create(EndPointInterface.class);
Call<Doctor> call = apiService.login(email, pwd);
call.enqueue(newCallback<Doctor>() {
@OverridepublicvoidonResponse(Call<Doctor> call, Response<Doctor> response) {
dialog.dismiss();
if (response.code() == 200) {
Doctordoctor= response.body();
if (doctor == null) {
AppUtil.showSimpleDialog(LoginActivity.this, getString(R.string.userid_pwd_mismatched),
getString(R.string.login_credential_mismatch));
} else {
SharedPreferences.Editoreditor= mAppPreferences.edit();
editor.putString(Constants.SETTINGS_OBJ_DOCTOR, newGson().toJson(doctor));
editor.putBoolean(Constants.SETTINGS_IS_LOGGED_IN, true);
editor.commit();
startActivity(newIntent(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));
}
}
@OverridepublicvoidonFailure(Call<Doctor> call, Throwable t) {
dialog.dismiss();
AppUtil.showSimpleDialog(LoginActivity.this,getString(R.string.server_error), t.getMessage());
}
});
}
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