没有静态方法元工厂

Question

我的应用程序有一个问题，当我登录时，应用程序崩溃并出现错误：

java.lang.NoSuchMethodError: No static method metafactory(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodType;Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/CallSite; in class Ljava/lang/invoke/LambdaMetafactory; or its super classes (declaration of 'java.lang.invoke.LambdaMetafactory' appears in /apex/com.android.runtime/javalib/core-oj.jar)
  at okhttp3.internal.Util.<clinit>(Util.java:87)
  at okhttp3.internal.Util.skipLeadingAsciiWhitespace(Util.java:321)
  at okhttp3.HttpUrl$Builder.parse(HttpUrl.java:1313)
  at okhttp3.HttpUrl.get(HttpUrl.java:917)
  at retrofit2.Retrofit$Builder.baseUrl(Retrofit.java:492)
  at com.example.usub.Remote.RetrofitClient.getClient(RetrofitClient.java:14)
  at com.example.usub.Common.Common.getGoogleAPI(Common.java:10)
  at com.example.usub.Welcome.onCreate(Welcome.java:208)
  at android.app.Activity.performCreate(Activity.java:7825)
  at android.app.Activity.performCreate(Activity.java:7814)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1306)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3245)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3409)
  at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:83)
  at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
  at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2016)
  at android.os.Handler.dispatchMessage(Handler.java:107)
  at android.os.Looper.loop(Looper.java:214)
  at android.app.ActivityThread.main(ActivityThread.java:7356)
  at java.lang.reflect.Method.invoke(Native Method)
  at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:930)

我试图弄乱 gradle 并更改变量。这个问题似乎源于这个包：

import retrofit2.Retrofit;
import retrofit2.converter.scalars.ScalarsConverterFactory;

public class RetrofitClient {
    private static Retrofit retrofit = null;

    public static Retrofit getClient(String baseURL)
    {
        if(retrofit == null)
        {
            retrofit = new Retrofit.Builder()
                         .baseUrl(baseURL)
                         .addConverterFactory(ScalarsConverterFactory.create())
                         .build();
        }
        return retrofit;
    }
}

然后它给出了另一个参考：

import com.example.usub.Remote.IGoogleAPI;
import com.example.usub.Remote.RetrofitClient;

public class Common {
    public static  final String baseURL = "https://maps.googleapis.com";

    public static IGoogleAPI getGoogleAPI()
    {
        return RetrofitClient.getClient(baseURL).create(IGoogleAPI.class);
    }
}

这是我的毕业证书：

import retrofit2.Retrofit;
import retrofit2.converter.scalars.ScalarsConverterFactory;

public class RetrofitClient {
    private static Retrofit retrofit = null;

    public static Retrofit getClient(String baseURL)
    {
        if(retrofit == null)
        {
            retrofit = new Retrofit.Builder()
                         .baseUrl(baseURL)
                         .addConverterFactory(ScalarsConverterFactory.create())
                         .build();
        }
        return retrofit;
    }
}

Answer 1

尝试切换到 Java 8 兼容模式，以便对某些库进行适当的脱糖：

android {

    ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }
}

此外，Google JSON API 可能更需要GsonConverterFactory.

Answer 2

您可以通过compileOptions在build.gradle(app) 文件中进行设置来解决此错误。

android {
    ...
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

Answer 3

就我而言，它不是为了改造。我正在使用一个本地库模块（名为Android XML to PDF Generator），该模块正在使用Java version 1.8 （用于使用 Rx Java），但我的应用程序级别Java version低于1.8.

所以我只是在我的应用程序级别build.gradle中添加了以下几行-

compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}

然后它对我有用！