在Android中启动时反应本地应用程序崩溃（API 19）

Question

我已使用react native cli创建了一个项目

当我在设备上使用命令“react native run android”启动应用程序时，android API级别为21的模拟器应用程序正在启动。

但是对于低于API 21的设备，应用程序在启动时崩溃。

我已经指定在Android Gradle minSdk版本16.

我使用“adb logcat”查看了堆栈跟踪，崩溃是由于OkHttp3在脸书Flipper内部使用，预计API 21。

我没有在我的应用程序中明确使用任何OkHttp3依赖项

6.14.4.

1. 使用react native CLI而不是Expo CLI创建项目

应用程序应在没有任何崩溃的情况下启动。

E/AndroidRuntime( 3745): java.lang.RuntimeException: Unable to create application com.infifive.MainApplication: java.lang.RuntimeException: Requested enabled DevSupportManager, but DevSupportManagerImpl class was not found or could not be created
E/AndroidRuntime( 3745):    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4347)
E/AndroidRuntime( 3745):    at android.app.ActivityThread.access$1500(ActivityThread.java:135)
E/AndroidRuntime( 3745):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
E/AndroidRuntime( 3745):    at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 3745):    at android.os.Looper.loop(Looper.java:136)
E/AndroidRuntime( 3745):    at android.app.ActivityThread.main(ActivityThread.java:5017)
E/AndroidRuntime( 3745):    at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 3745):    at java.lang.reflect.Method.invoke(Method.java:515)
E/AndroidRuntime( 3745):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
E/AndroidRuntime( 3745):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
E/AndroidRuntime( 3745):    at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 3745): Caused by: java.lang.RuntimeException: Requested enabled DevSupportManager, but DevSupportManagerImpl class was not found or could not be created
E/AndroidRuntime( 3745):    at com.facebook.react.devsupport.DevSupportManagerFactory.create(DevSupportManagerFactory.java:90)
E/AndroidRuntime( 3745):    at com.facebook.react.ReactInstanceManager.<init>(ReactInstanceManager.java:238)
E/AndroidRuntime( 3745):    at com.facebook.react.ReactInstanceManagerBuilder.build(ReactInstanceManagerBuilder.java:281)
E/AndroidRuntime( 3745):    at com.facebook.react.ReactNativeHost.createReactInstanceManager(ReactNativeHost.java:87)
E/AndroidRuntime( 3745):    at com.facebook.react.ReactNativeHost.getReactInstanceManager(ReactNativeHost.java:39)
E/AndroidRuntime( 3745):    at com.infifive.MainApplication.onCreate(MainApplication.java:47)
E/AndroidRuntime( 3745):    at android.app.Instrumentation.callApplicationOnCreate(Instrumentation.java:1007)
E/AndroidRuntime( 3745):    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4344)
E/AndroidRuntime( 3745):    ... 10 more
E/AndroidRuntime( 3745): Caused by: java.lang.reflect.InvocationTargetException
E/AndroidRuntime( 3745):    at java.lang.reflect.Constructor.constructNative(Native Method)
E/AndroidRuntime( 3745):    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
E/AndroidRuntime( 3745):    at com.facebook.react.devsupport.DevSupportManagerFactory.create(DevSupportManagerFactory.java:80)
E/AndroidRuntime( 3745):    ... 17 more
E/AndroidRuntime( 3745): Caused by: java.lang.ExceptionInInitializerError
E/AndroidRuntime( 3745):    at okhttp3.OkHttpClient.newSslSocketFactory(OkHttpClient.java:263)
E/AndroidRuntime( 3745):    at okhttp3.OkHttpClient.<init>(OkHttpClient.java:229)
E/AndroidRuntime( 3745):    at okhttp3.OkHttpClient$Builder.build(OkHttpClient.java:1015)
E/AndroidRuntime( 3745):    at com.facebook.react.devsupport.DevServerHelper.<init>(DevServerHelper.java:132)
E/AndroidRuntime( 3745):    at com.facebook.react.devsupport.DevSupportManagerImpl.<init>(DevSupportManagerImpl.java:183)
E/AndroidRuntime( 3745):    ... 20 more
E/AndroidRuntime( 3745): Caused by: java.lang.IllegalStateException: Expected Android API level 21+ but was 19
E/AndroidRuntime( 3745):    at okhttp3.internal.platform.AndroidPlatform.buildIfSupported(AndroidPlatform.java:238)
E/AndroidRuntime( 3745):    at okhttp3.internal.platform.Platform.findPlatform(Platform.java:202)
E/AndroidRuntime( 3745):    at okhttp3.internal.platform.Platform.<clinit>(Platform.java:79)`

Answer 1

这是因为在名为“okhttp”的库中进行了内部检查，其中较新的版本只支持API 21及以上版本。如果可能的话，减少okhttp版本，或者与之相关的任何东西，如滑翔或改装等。那会解决你的问题。

Answer 2

我发现修复它的唯一方法是在这里注释掉所有与脚蹼GH线程相关的代码