Android 5 上 Kotlin 的 java 依赖项中的外部 java 依赖项中的 java.lang.NoSuchMethodError答案

【问题标题】：java.lang.NoSuchMethodError in external java dependency inside the java dependency from Kotlin on Android 5Android 5 上 Kotlin 的 java 依赖项中的外部 java 依赖项中的 java.lang.NoSuchMethodError
【发布时间】：2019-11-06 19:48:01
【问题描述】：

我从包含来自 Kotlin 上的 android 应用程序的另一个外部依赖项（retro stream）的存储库中实现了外部 JAVA-依赖项，结果我遇到了崩溃java.lang.NoSuchMethodError: No static method 在 android 5 上根据 JAVA-库中的跟踪（跟踪附在下面） .问题出现在 retro stream 库中的 Stream 类中（方法“of”）。我检查了这个库是否存在于外部依赖项中，并且所有类和方法都可以从代码中看到，而且最有趣的是，它不会在 android> = 7 设备上崩溃。

我已尝试从 kotlin 代码中显式调用方法 - 一切正常。

Versions: 
Kotlin                   1.3.50 
Gradle plugin            3.4.2
Gradle                   5.4.1
Android studio           3.5

问题代码：

    EmptyUtils.getLastNotNullGotValue(Supplier { "" })

E/AndroidRuntime(5699): 致命异常: main E/AndroidRuntime( 5699）：进程：com.jetruby.kotlindslgradleexample，PID：5699 E/AndroidRuntime(5699): java.lang.NoSuchMethodError: 没有静态方法 of([Ljava/lang/Object;)Ljava9/util/stream/Stream;在班上 Ljava9/util/流/流；或其超类（声明 'java9.util.stream.Stream' 出现在 /data/app/com.jetruby.kotlindslgradleexample-2/base.apk) E/AndroidRuntime（5699）：在 ru.m4bank.mpos.service.network.utils.EmptyUtils.getLastNotNullGotValueOrDefault(EmptyUtils.java:40) E/AndroidRuntime（5699）：在 ru.m4bank.mpos.service.network.utils.EmptyUtils.getLastNotNullGotValue(EmptyUtils.java:51) E/AndroidRuntime（5699）：在 com.jetruby.kotlindslgradleexample.MainActivity.onCreate(MainActivity.kt:33) E/AndroidRuntime（5699）：在 android.app.Activity.performCreate(Activity.java:5990) E/AndroidRuntime（5699）：在 android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106) E/AndroidRuntime（5699）：在 android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278) E/AndroidRuntime（5699）：在 android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387) E/AndroidRuntime（5699）：在 android.app.ActivityThread.access$800(ActivityThread.java:151) E/AndroidRuntime（5699）：在 android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303) E/AndroidRuntime（5699）：在 android.os.Handler.dispatchMessage(Handler.java:102) E/AndroidRuntime( 5699): 在 android.os.Looper.loop(Looper.java:135) E/AndroidRuntime( 5699): 在 android.app.ActivityThread.main(ActivityThread.java:5254) E/AndroidRuntime(5699): 在 java.lang.reflect.Method.invoke(Native 方法）E/AndroidRuntime（5699）：在 java.lang.reflect.Method.invoke(Method.java:372) E/AndroidRuntime( 5699): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) E/AndroidRuntime（5699）：在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

尝试了各种组装选项，我发现如果你在本地（通过文件）实现JAVA-依赖，在5-th android上不会崩溃！！。此外，如果从 JAVA 编译，而不是从 kotlin 编译，则不会发生下降。而且它只适用于接口中的静态方法。

在下面的图片中，有 2 个依赖变量（第一个是我从 gradle 缓存中复制的，当我拉起第二个并在本地实现为 file 时，第二个刚刚从存储库中提取）。

Implementation variants

结果：

On android <7:  1-st variant - all ok, 2-nd variant - crashes.
On android >=7 - 1,2 variants - ok

我已经反编译了应用程序并注意到 来自 kotlin 来自接口的静态方法 被收集在一个单独的类中（辅助内部类 ClassName.CC 被创建并在其中放置静态方法）。所以，当从仓库实现依赖时，反编译的外部类指的是原类和原方法，而当从本地源实现时>（从拉出来的仓库复制到libs文件夹），它是指辅助XX.CC。有一种怀疑是java.lang.NoSuchMethodError crash: No static method的原因。

Decompiled classes of the problem class

下面的代码是“缺少”方法的“帮助”类的反编译代码。成功和不成功的构建都是一样的：

    .class public final synthetic Ljava9/util/stream/Stream$-CC;
        .super Ljava/lang/Object;
        .source "Stream.java"


        # direct methods
        .method public static $default$dropWhile(Ljava9/util/stream/Stream;Ljava9/util/function/Predicate;)Ljava9/util/stream/Stream;
            .locals 3
            .param p0, "_this"    # Ljava9/util/stream/Stream;
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "(",
                    "Ljava9/util/function/Predicate<",
                    "-TT;>;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 630
            .local p0, "this":Ljava9/util/stream/Stream;, "Ljava9/util/stream/Stream<TT;>;"
            .local p1, "predicate":Ljava9/util/function/Predicate;, "Ljava9/util/function/Predicate<-TT;>;"
            invoke-static {p1}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 633
            new-instance v0, Ljava9/util/stream/WhileOps$UnorderedWhileSpliterator$OfRef$Dropping;

            .line 634
            invoke-interface {p0}, Ljava9/util/stream/Stream;->spliterator()Ljava9/util/Spliterator;

            move-result-object v1

            const/4 v2, 0x1

            invoke-direct {v0, v1, v2, p1}, Ljava9/util/stream/WhileOps$UnorderedWhileSpliterator$OfRef$Dropping;-><init>(Ljava9/util/Spliterator;ZLjava9/util/function/Predicate;)V

            .line 635
            invoke-interface {p0}, Ljava9/util/stream/Stream;->isParallel()Z

            move-result v1

            .line 633
            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v0

            .line 635
            invoke-static {p0}, Ljava9/util/stream/StreamSupport;->closeHandler(Ljava9/util/stream/BaseStream;)Ljava/lang/Runnable;

            move-result-object v1

            invoke-interface {v0, v1}, Ljava9/util/stream/Stream;->onClose(Ljava/lang/Runnable;)Ljava9/util/stream/BaseStream;

            move-result-object v0

            check-cast v0, Ljava9/util/stream/Stream;

            return-object v0
        .end method

        .method public static $default$takeWhile(Ljava9/util/stream/Stream;Ljava9/util/function/Predicate;)Ljava9/util/stream/Stream;
            .locals 3
            .param p0, "_this"    # Ljava9/util/stream/Stream;
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "(",
                    "Ljava9/util/function/Predicate<",
                    "-TT;>;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 564
            .local p0, "this":Ljava9/util/stream/Stream;, "Ljava9/util/stream/Stream<TT;>;"
            .local p1, "predicate":Ljava9/util/function/Predicate;, "Ljava9/util/function/Predicate<-TT;>;"
            invoke-static {p1}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 567
            new-instance v0, Ljava9/util/stream/WhileOps$UnorderedWhileSpliterator$OfRef$Taking;

            .line 568
            invoke-interface {p0}, Ljava9/util/stream/Stream;->spliterator()Ljava9/util/Spliterator;

            move-result-object v1

            const/4 v2, 0x1

            invoke-direct {v0, v1, v2, p1}, Ljava9/util/stream/WhileOps$UnorderedWhileSpliterator$OfRef$Taking;-><init>(Ljava9/util/Spliterator;ZLjava9/util/function/Predicate;)V

            .line 569
            invoke-interface {p0}, Ljava9/util/stream/Stream;->isParallel()Z

            move-result v1

            .line 567
            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v0

            .line 569
            invoke-static {p0}, Ljava9/util/stream/StreamSupport;->closeHandler(Ljava9/util/stream/BaseStream;)Ljava/lang/Runnable;

            move-result-object v1

            invoke-interface {v0, v1}, Ljava9/util/stream/Stream;->onClose(Ljava/lang/Runnable;)Ljava9/util/stream/BaseStream;

            move-result-object v0

            check-cast v0, Ljava9/util/stream/Stream;

            return-object v0
        .end method

        .method public static builder()Ljava9/util/stream/Stream$Builder;
            .locals 1
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">()",
                    "Ljava9/util/stream/Stream$Builder<",
                    "TT;>;"
                }
            .end annotation

            .line 1148
            new-instance v0, Ljava9/util/stream/Streams$StreamBuilderImpl;

            invoke-direct {v0}, Ljava9/util/stream/Streams$StreamBuilderImpl;-><init>()V

            return-object v0
        .end method

        .method public static concat(Ljava9/util/stream/Stream;Ljava9/util/stream/Stream;)Ljava9/util/stream/Stream;
            .locals 3
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">(",
                    "Ljava9/util/stream/Stream<",
                    "+TT;>;",
                    "Ljava9/util/stream/Stream<",
                    "+TT;>;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1387
            .local p0, "a":Ljava9/util/stream/Stream;, "Ljava9/util/stream/Stream<+TT;>;"
            .local p1, "b":Ljava9/util/stream/Stream;, "Ljava9/util/stream/Stream<+TT;>;"
            invoke-static {p0}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 1388
            invoke-static {p1}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 1391
            new-instance v0, Ljava9/util/stream/Streams$ConcatSpliterator$OfRef;

            .line 1392
            invoke-interface {p0}, Ljava9/util/stream/Stream;->spliterator()Ljava9/util/Spliterator;

            move-result-object v1

            invoke-interface {p1}, Ljava9/util/stream/Stream;->spliterator()Ljava9/util/Spliterator;

            move-result-object v2

            invoke-direct {v0, v1, v2}, Ljava9/util/stream/Streams$ConcatSpliterator$OfRef;-><init>(Ljava9/util/Spliterator;Ljava9/util/Spliterator;)V

            .line 1393
            .local v0, "split":Ljava9/util/Spliterator;, "Ljava9/util/Spliterator<TT;>;"
            invoke-interface {p0}, Ljava9/util/stream/Stream;->isParallel()Z

            move-result v1

            if-nez v1, :cond_1

            invoke-interface {p1}, Ljava9/util/stream/Stream;->isParallel()Z

            move-result v1

            if-eqz v1, :cond_0

            goto :goto_0

            :cond_0
            const/4 v1, 0x0

            goto :goto_1

            :cond_1
            :goto_0
            const/4 v1, 0x1

            :goto_1
            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v1

            .line 1394
            .local v1, "stream":Ljava9/util/stream/Stream;, "Ljava9/util/stream/Stream<TT;>;"
            invoke-static {p0, p1}, Ljava9/util/stream/Streams;->composedClose(Ljava9/util/stream/BaseStream;Ljava9/util/stream/BaseStream;)Ljava/lang/Runnable;

            move-result-object v2

            invoke-interface {v1, v2}, Ljava9/util/stream/Stream;->onClose(Ljava/lang/Runnable;)Ljava9/util/stream/BaseStream;

            move-result-object v2

            check-cast v2, Ljava9/util/stream/Stream;

            return-object v2
        .end method

        .method public static empty()Ljava9/util/stream/Stream;
            .locals 2
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">()",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1158
            invoke-static {}, Ljava9/util/Spliterators;->emptySpliterator()Ljava9/util/Spliterator;

            move-result-object v0

            const/4 v1, 0x0

            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v0

            return-object v0
        .end method

        .method public static generate(Ljava9/util/function/Supplier;)Ljava9/util/stream/Stream;
            .locals 3
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">(",
                    "Ljava9/util/function/Supplier<",
                    "+TT;>;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1345
            .local p0, "s":Ljava9/util/function/Supplier;, "Ljava9/util/function/Supplier<+TT;>;"
            invoke-static {p0}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 1346
            new-instance v0, Ljava9/util/stream/StreamSpliterators$InfiniteSupplyingSpliterator$OfRef;

            const-wide v1, 0x7fffffffffffffffL

            invoke-direct {v0, v1, v2, p0}, Ljava9/util/stream/StreamSpliterators$InfiniteSupplyingSpliterator$OfRef;-><init>(JLjava9/util/function/Supplier;)V

            const/4 v1, 0x0

            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v0

            return-object v0
        .end method

        .method public static iterate(Ljava/lang/Object;Ljava9/util/function/Predicate;Ljava9/util/function/UnaryOperator;)Ljava9/util/stream/Stream;
            .locals 8
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    "S:TT;>(TS;",
                    "Ljava9/util/function/Predicate<",
                    "TS;>;",
                    "Ljava9/util/function/UnaryOperator<",
                    "TS;>;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1287
            .local p0, "seed":Ljava/lang/Object;, "TS;"
            .local p1, "hasNext":Ljava9/util/function/Predicate;, "Ljava9/util/function/Predicate<TS;>;"
            .local p2, "next":Ljava9/util/function/UnaryOperator;, "Ljava9/util/function/UnaryOperator<TS;>;"
            invoke-static {p2}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 1288
            invoke-static {p1}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 1289
            new-instance v7, Ljava9/util/stream/Stream$2;

            const-wide v1, 0x7fffffffffffffffL

            const/16 v3, 0x410

            move-object v0, v7

            move-object v4, p2

            move-object v5, p0

            move-object v6, p1

            invoke-direct/range {v0 .. v6}, Ljava9/util/stream/Stream$2;-><init>(JILjava9/util/function/UnaryOperator;Ljava/lang/Object;Ljava9/util/function/Predicate;)V

            .line 1331
            .local v0, "spliterator":Ljava9/util/Spliterator;, "Ljava9/util/Spliterator<TT;>;"
            const/4 v1, 0x0

            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v1

            return-object v1
        .end method

        .method public static iterate(Ljava/lang/Object;Ljava9/util/function/UnaryOperator;)Ljava9/util/stream/Stream;
            .locals 7
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    "S:TT;>(TS;",
                    "Ljava9/util/function/UnaryOperator<",
                    "TS;>;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1224
            .local p0, "seed":Ljava/lang/Object;, "TS;"
            .local p1, "f":Ljava9/util/function/UnaryOperator;, "Ljava9/util/function/UnaryOperator<TS;>;"
            invoke-static {p1}, Ljava9/util/Objects;->requireNonNull(Ljava/lang/Object;)Ljava/lang/Object;

            .line 1225
            new-instance v6, Ljava9/util/stream/Stream$1;

            const-wide v1, 0x7fffffffffffffffL

            const/16 v3, 0x410

            move-object v0, v6

            move-object v4, p1

            move-object v5, p0

            invoke-direct/range {v0 .. v5}, Ljava9/util/stream/Stream$1;-><init>(JILjava9/util/function/UnaryOperator;Ljava/lang/Object;)V

            .line 1244
            .local v0, "spliterator":Ljava9/util/Spliterator;, "Ljava9/util/Spliterator<TT;>;"
            const/4 v1, 0x0

            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v1

            return-object v1
        .end method

        .method public static of(Ljava/lang/Object;)Ljava9/util/stream/Stream;
            .locals 2
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">(TT;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1169
            .local p0, "t":Ljava/lang/Object;, "TT;"
            new-instance v0, Ljava9/util/stream/Streams$StreamBuilderImpl;

            invoke-direct {v0, p0}, Ljava9/util/stream/Streams$StreamBuilderImpl;-><init>(Ljava/lang/Object;)V

            const/4 v1, 0x0

            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v0

            return-object v0
        .end method

        .method public static varargs of([Ljava/lang/Object;)Ljava9/util/stream/Stream;
            .locals 1
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">([TT;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1196
            .local p0, "values":[Ljava/lang/Object;, "[TT;"
            invoke-static {p0}, Ljava9/util/J8Arrays;->stream([Ljava/lang/Object;)Ljava9/util/stream/Stream;

            move-result-object v0

            return-object v0
        .end method

        .method public static ofNullable(Ljava/lang/Object;)Ljava9/util/stream/Stream;
            .locals 2
            .annotation system Ldalvik/annotation/Signature;
                value = {
                    "<T:",
                    "Ljava/lang/Object;",
                    ">(TT;)",
                    "Ljava9/util/stream/Stream<",
                    "TT;>;"
                }
            .end annotation

            .line 1183
            .local p0, "t":Ljava/lang/Object;, "TT;"
            if-nez p0, :cond_0

            invoke-static {}, Ljava9/util/stream/Stream$-CC;->empty()Ljava9/util/stream/Stream;

            move-result-object v0

            goto :goto_0

            :cond_0
            new-instance v0, Ljava9/util/stream/Streams$StreamBuilderImpl;

            invoke-direct {v0, p0}, Ljava9/util/stream/Streams$StreamBuilderImpl;-><init>(Ljava/lang/Object;)V

            const/4 v1, 0x0

            .line 1184
            invoke-static {v0, v1}, Ljava9/util/stream/StreamSupport;->stream(Ljava9/util/Spliterator;Z)Ljava9/util/stream/Stream;

            move-result-object v0

            :goto_0
            return-object v0
        .end method

JAVA-库的反编译方法，其中调用了不存在的方法（Build with crash）：

    .method public static varargs getLastNotNullValue([Ljava/lang/Object;)Ljava/lang/Object;
        .locals 2
        .annotation system Ldalvik/annotation/Signature;
            value = {
                "<T:",
                "Ljava/lang/Object;",
                ">([TT;)TT;"
            }
        .end annotation

        .annotation runtime Ljava/lang/SafeVarargs;
        .end annotation

        .line 56
        .local p0, "values":[Ljava/lang/Object;, "[TT;"
        invoke-static {p0}, Ljava9/util/stream/Stream;->of([Ljava/lang/Object;)Ljava9/util/stream/Stream;

        move-result-object v0

        sget-object v1, Lru/m4bank/mpos/service/network/utils/-$$Lambda$h24iVvNNOyPAWTyqI3I8dzCunHY;->INSTANCE:Lru/m4bank/mpos/service/network/utils/-$$Lambda$h24iVvNNOyPAWTyqI3I8dzCunHY;

        invoke-interface {v0, v1}, Ljava9/util/stream/Stream;->filter(Ljava9/util/function/Predicate;)Ljava9/util/stream/Stream;

        move-result-object v0

        invoke-interface {v0}, Ljava9/util/stream/Stream;->findFirst()Ljava9/util/Optional;

        move-result-object v0

        sget-object v1, Lru/m4bank/mpos/service/network/utils/-$$Lambda$EmptyUtils$2lJJnncNhWO5-cW1nB8g96aMo4M;->INSTANCE:Lru/m4bank/mpos/service/network/utils/-$$Lambda$EmptyUtils$2lJJnncNhWO5-cW1nB8g96aMo4M;

        invoke-virtual {v0, v1}, Ljava9/util/Optional;->orElseGet(Ljava9/util/function/Supplier;)Ljava/lang/Object;

        move-result-object v0

        return-object v0
    .end method

同样的反编译方法（Build without crash）：

    .method public static varargs getLastNotNullValue([Ljava/lang/Object;)Ljava/lang/Object;
        .locals 2
        .annotation system Ldalvik/annotation/Signature;
            value = {
                "<T:",
                "Ljava/lang/Object;",
                ">([TT;)TT;"
            }
        .end annotation

        .annotation runtime Ljava/lang/SafeVarargs;
        .end annotation

        .line 56
        .local p0, "values":[Ljava/lang/Object;, "[TT;"
        invoke-static {p0}, Ljava9/util/stream/Stream$-CC;->of([Ljava/lang/Object;)Ljava9/util/stream/Stream;

        move-result-object v0

        sget-object v1, Lru/m4bank/mpos/service/network/utils/-$$Lambda$h24iVvNNOyPAWTyqI3I8dzCunHY;->INSTANCE:Lru/m4bank/mpos/service/network/utils/-$$Lambda$h24iVvNNOyPAWTyqI3I8dzCunHY;

        invoke-interface {v0, v1}, Ljava9/util/stream/Stream;->filter(Ljava9/util/function/Predicate;)Ljava9/util/stream/Stream;

        move-result-object v0

        invoke-interface {v0}, Ljava9/util/stream/Stream;->findFirst()Ljava9/util/Optional;

        move-result-object v0

        sget-object v1, Lru/m4bank/mpos/service/network/utils/-$$Lambda$EmptyUtils$2lJJnncNhWO5-cW1nB8g96aMo4M;->INSTANCE:Lru/m4bank/mpos/service/network/utils/-$$Lambda$EmptyUtils$2lJJnncNhWO5-cW1nB8g96aMo4M;

        invoke-virtual {v0, v1}, Ljava9/util/Optional;->orElseGet(Ljava9/util/function/Supplier;)Ljava/lang/Object;

        move-result-object v0

        return-object v0
    .end method

问题：是 kotlin 错误还是我做错了什么，然后我该如何使用 JAVA-库来自存储库（其中包含内部带有静态方法的接口）在android 上并且不会崩溃？

【问题讨论】：

很遗憾，从你的描述来看，我并没有真正理解你在这里做什么。
你设置compileKotlin.kotlinOptions.jvmTarget = "1.8"了吗？
您显示的getLastNotNullValue 字节码显然没有经过Android R8 脱糖。您是否有机会使用 Instant Run 或过时的 AS 版本？
@Satorius，是的，我已经检查过使用它。 compileOptions { setSourceCompatibility(JavaVersion.VERSION_1_8) setTargetCompatibility(JavaVersion.VERSION_1_8) } kotlinOptions { val options = this as? KotlinJvmOptions options?.jvmTarget = JavaVersion.VERSION_1_8.toString() }
我认为关键时刻是我实现了依赖by repo。 Stream.of 在 JAVA 依赖中被调用。如果我从代码中调用它 - 一切都会好的，如果我下载依赖项并在本地实现一切都会好的。为什么脱糖是在第一种情况下进行，而不是在第二种情况下进行？

标签： android gradle kotlin java-8

【解决方案1】：

您正在尝试在 Android API 级别 Java Stream Api，这是不可能的。

根据 Android API 级别here检查您可以使用和不能使用的内容

【讨论】：

废话。他正在使用针对 API 级别 backport。至少在 Java 中使用时可以正常工作。

【解决方案2】：

我又遇到了这个问题（将Android Gradle Plugin版本升级到4+之后），不得不自己解决。

经过调查，我发现问题出在哪里：

我所有的依赖项都是工件 -> 它没有元数据。
Android Studio组装apk的方式与控制台不同（在组装过程中通过运行按钮增加了API级别的选项以加快速度）-> android 7+ 设备只能工作，因为目标 API 是 24+ 并且没有对接口中的静态方法进行脱糖。
Java 版本由于不同的脱糖和依赖缓存机制而工作（在将 Android Gradle 插件 更新为 4+ 后停止工作）。
关于本地依赖：我认为它可以工作，因为 gradle 不缓存它并且必须重新编译。

解决方案 我已将适当的元数据（pom.xml 或 .module 文件）添加到我的依赖项中，它显式标记二进制文件依赖关系图，现在 R8 使适当的脱糖，现在一切正常。

P. S. 如果所有依赖项都将在本地实现，它就可以工作，但它看起来更像是解决方法。

【讨论】：