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问预期Android级别为21+，但使用Retrofit 2，OkHttp3时为19
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Stack Overflow用户

提问于 2019-11-03 11:37:35

回答 3查看 6.8K关注 0票数 2

我使用Retrofit 2和OkHttp3从服务器获取数据，使用Min_SDK 17时出错，我的设备API也是17

我试过这样的答案:How to fix Expected Android API level 21+ but was 19 in Android

我也试过这个答案，https://github.com/square/okhttp/issues/4597#issuecomment-461204144

但我也犯了同样的错误。

我的Gradle.Build类

    apply plugin: 'com.android.application'

     android {
compileSdkVersion 28
defaultConfig {
    applicationId "some"
    minSdkVersion 17
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
    release {
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
}
packagingOptions {
    exclude 'META-INF/DEPENDENCIES'
}
compileOptions {
    targetCompatibility = "8"
    sourceCompatibility = "8"
}
lintOptions {
    checkReleaseBuilds false
    // Or, if you prefer, you can continue to check for errors in release builds,
    // but continue the build even when errors are found:
}
 }

 dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support:support-v13:28.0.0'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:recyclerview-v7:28.0.0'
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
implementation "com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0"
implementation "com.squareup.okhttp3:okhttp:3.11.0"
implementation "com.squareup.okhttp3:okhttp-urlconnection:3.11.0"
implementation "com.squareup.okhttp3:logging-interceptor:3.11.0"
implementation 'com.google.code.gson:gson:2.8.2'
implementation 'net.alhazmy13.hijridatepicker:library:2.0.2'
implementation group: 'com.github.msarhan', name: 'ummalqura-calendar', version: '1.1.9'
implementation 'com.google.android.gms:play-services-maps:16.1.0'
implementation 'com.google.android.gms:play-services-location:16.0.0'
implementation 'com.google.android.gms:play-services-places:16.1.0'
implementation 'com.github.jaiselrahman:FilePicker:1.0.2'
implementation 'com.github.bumptech.glide:glide:4.5.0'
implementation 'com.squareup.okhttp3:okhttp:3.13.1'
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'com.loopj.android:android-async-http:1.4.9'
implementation 'com.google.android.gms:play-services-auth-api-phone:16.0.0'

        annotationProcessor 'com.github.bumptech.glide:compiler:4.9.0'

testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.2'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
   }

我的API客户机

    public class APIClient {

private static Retrofit retrofit;
private static OkHttpClient okHttpClient;

public static Retrofit getInstanceRetrofit(){

    if(okHttpClient==null) {
        initOkHttp();
    }
    if(retrofit==null) {
        retrofit = new Retrofit.Builder()
                .baseUrl(Const.URL)
                .client(okHttpClient)
                .addConverterFactory(GsonConverterFactory.create())
                .build();
    }
        return retrofit;

}

  private static void initOkHttp() {
    int REQUEST_TIMEOUT = 60;
    OkHttpClient.Builder httpClient = new OkHttpClient().newBuilder()
            .connectTimeout(REQUEST_TIMEOUT, TimeUnit.SECONDS)
            .readTimeout(REQUEST_TIMEOUT, TimeUnit.SECONDS)
            .writeTimeout(REQUEST_TIMEOUT, TimeUnit.SECONDS);

    HttpLoggingInterceptor interceptor = new HttpLoggingInterceptor();
    interceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

    httpClient.addInterceptor(interceptor);

    httpClient.addInterceptor(new Interceptor() {
        @Override
        public Response intercept(@NonNull Chain chain) throws IOException {
            Request original = chain.request();
            Request.Builder requestBuilder = original.newBuilder()
                    .addHeader("Accept", "application/json")
                    .addHeader("Content-Type", "application/json");
            Request request = requestBuilder.build();
            return chain.proceed(request);
        }
    });

    okHttpClient = httpClient.build();
}
  }

我的日志

    1-03 06:09:07.850 2827-2827/some
   E/AndroidRuntime: FATAL EXCEPTION: main
Process: some, PID: 2827
java.lang.ExceptionInInitializerError
    at okhttp3.OkHttpClient.newSslSocketFactory(OkHttpClient.java:296)
    at okhttp3.OkHttpClient.<init>(OkHttpClient.java:262)
    at okhttp3.OkHttpClient.<init>(OkHttpClient.java:235)
    at some.Network.APIClient.initOkHttp(APIClient.java:40)
    at some.Network.APIClient.getInstanceRetrofit(APIClient.java:25)
    at some.MvpImplementation.DropdownImpInteractor.getDropdowns(DropdownImpInteractor.java:18)
    at some.MvpImplementation.DropdownImpPresenter.requestDropdowns(DropdownImpPresenter.java:21)
    at some.Views.LoginActivity.onCreate(LoginActivity.java:87)
    at android.app.Activity.performCreate(Activity.java:5231)
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233)
    at android.app.ActivityThread.access$800(ActivityThread.java:135)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
    at android.os.Handler.dispatchMessage(Handler.java:102)
    at android.os.Looper.loop(Looper.java:136)
    at android.app.ActivityThread.main(ActivityThread.java:5001)
    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:785)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601)
    at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.IllegalStateException: Expected Android API level 21+ but was 19
    at okhttp3.internal.platform.AndroidPlatform.buildIfSupported(AndroidPlatform.java:238)
    at okhttp3.internal.platform.Platform.findPlatform(Platform.java:202)
    at okhttp3.internal.platform.Platform.<clinit>(Platform.java:79)
    at okhttp3.OkHttpClient.newSslSocketFactory(OkHttpClient.java:296) 
    at okhttp3.OkHttpClient.<init>(OkHttpClient.java:262) 
    at okhttp3.OkHttpClient.<init>(OkHttpClient.java:235) 
    at some.Network.APIClient.initOkHttp(APIClient.java:40) 
    at some.Network.APIClient.getInstanceRetrofit(APIClient.java:25) 
    at some.MvpImplementation.DropdownImpInteractor.getDropdowns(DropdownImpInteractor.java:18) 
    at some.MvpImplementation.DropdownImpPresenter.requestDropdowns(DropdownImpPresenter.java:21) 
    at some.Views.LoginActivity.onCreate(LoginActivity.java:87) 
    at android.app.Activity.performCreate(Activity.java:5231) 
    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087) 
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2148) 
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2233) 
    at android.app.ActivityThread.access$800(ActivityThread.java:135) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196) 
    at android.os.Handler.dispatchMessage(Handler.java:102) 
    at android.os.Looper.loop(Looper.java:136) 
    at android.app.ActivityThread.main(ActivityThread.java:5001) 
    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:785) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:601) 
    at dalvik.system.NativeStart.main(Native Method)

sdk

retrofit2

okhttp

java

android

回答 3

Stack Overflow用户

回答已采纳

发布于 2019-11-03 11:54:55

问题是，您已经两次添加了OkHttp依赖项。

在您的build.gradle中有：

dependencies {
    ...
    implementation "com.squareup.okhttp3:okhttp:3.11.0"
    ...
    implementation "com.squareup.okhttp3:okhttp:3.13.1"
}

从3.13.0版本开始，他们删除了对Android < 5的支持。

implementation "com.squareup.okhttp3:okhttp:3.13.1"

线和它应该工作的很好

票数 4

Stack Overflow用户

发布于 2020-02-25 08:50:46

如果你们还在Android 4.0 and above上崩溃，下面是快速解决方案：

implementation("com.squareup.retrofit2:retrofit:2.7.1")

implementation("com.squareup.okhttp3:okhttp:3.12.8") {
force = true
}

implementation "com.squareup.okhttp3:logging-interceptor:3.12.8"

以上代码在Android 4.4上进行了测试和验证

谢谢

票数 4

Stack Overflow用户

发布于 2019-11-03 11:53:44

在您的gradle文件中有：

implementation "com.squareup.okhttp3:okhttp:3.11.0"

医生说：

https://square.github.io/okhttp/

OkHttp工作在Android 5.0+ (API级21+)和Java 8+上。

OkHttp 3.12.x分支支持Android 2.3+ (API级9+)和7+。这些平台缺乏对TLS 1.2的支持，不应使用。但是由于升级很困难，我们将支持3.12.x分支的关键修正，直到2020年12月31日。

所以你可以试着：

implementation "com.squareup.okhttp3:okhttp:3.12.0"

票数 2

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/58679774

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问预期Android级别为21+，但使用Retrofit 2，OkHttp3时为19
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问预期Android级别为21+，但使用Retrofit 2，OkHttp3时为19
EN