java.lang.RuntimeException：将结果 ResultInfo{...} 传递给活动 {....FacebookSignUp} 失败：java.lang.NullPointerException：

Question

在 Google Play 管理中心发布前的报告中，我的“稳定性”部分出现了需要修复的错误：

银河 S9

测试 ID： 2 测试时长： 300 秒 型号名称： Galaxy S9 制造商： 三星 Android 版本： Android 8.0 语言环境： es_US 屏幕尺寸： 1080 × 2220 屏幕密度 (dpi)： 480 内存： 4096 MB OpenGL ES 版本： 3.2 原生平台： armeabi-v7a CPU 制造商： 高通 CPU型号： SDM845

Issue: java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=32665, result=0, data=null} to activity {[...].FacebookSignUp}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference

FATAL EXCEPTION: main
Process: [...], PID: 25180
java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=32665, result=0, data=null} to activity {[...].FacebookSignUp}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference
    at android.app.ActivityThread.deliverResults(ActivityThread.java:4489)
    at android.app.ActivityThread.handleSendResult(ActivityThread.java:4532)
    at android.app.ActivityThread.-wrap20(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1752)
    at android.os.Handler.dispatchMessage(Handler.java:105)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6938)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.content.Intent.getStringExtra(java.lang.String)' on a null object reference
    at com.easy.facebook.android.facebook.FBLoginManager.loginSuccess(FBLoginManager.java:99)
    at [...].FacebookSignUp.onActivityResult(FacebookSignUp.java:187)
    at android.app.Activity.dispatchActivityResult(Activity.java:7539)
    at android.app.ActivityThread.deliverResults(ActivityThread.java:4485)
    ... 9 more

我怀疑这个问题可能是因为我的 Facebook 库太旧了。在我的app/build.gradle 中，我正在使用这个 Facebook 库：

implementation 'com.facebook.android:facebook-android-sdk:3.23.1'

我确信它已经很老了，很可能在很多方面都被弃用了。虽然它仍然有效，但它可能是我看到的这个错误的原因。另外，我正在使用这个：

dependencies {
    ...
    implementation files('libs/easyfacebookandroidsdk_2.3.jar')
    ....
}

那个 Facebook 图书馆一定是原因。关于修复我在错误中看到的NullPointerException 的任何想法？我想最好的办法应该是升级那些非常旧的 Facebook 库。

Answer 1

问题不在于 Facebook。检查日志后，真正的问题是：

E/AndroidRuntime: FATAL EXCEPTION: Thread-6
Process: [package name], PID: 5893
java.lang.NoClassDefFoundError: Failed resolution of: Lorg/apache/http/impl/client/DefaultHttpClient;
    at com.couponclub.Util.Util$1.run(Util.java:235)
    at java.lang.Thread.run(Thread.java:764)
 Caused by: java.lang.ClassNotFoundException: Didn't find class "org.apache.http.impl.client.DefaultHttpClient" on path: DexPathList[[zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/base.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_dependencies_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_resources_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_0_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_1_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_2_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_3_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_4_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_5_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_6_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_7_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_8_apk.apk", zip file "/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_slice_9_apk.apk"],nativeLibraryDirectories=[/data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/lib/x86, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:134)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
    at com.couponclub.Util.Util$1.run(Util.java:235) 
    at java.lang.Thread.run(Thread.java:764) 
    Suppressed: java.io.IOException: No original dex files found for dex location /data/app/[package name]-3cwAF4cAFytf561aNx4V2Q==/split_lib_resources_apk.apk
    at dalvik.system.DexFile.openDexFileNative(Native Method)
    at dalvik.system.DexFile.openDexFile(DexFile.java:354)
    at dalvik.system.DexFile.<init>(DexFile.java:101)
    at dalvik.system.DexFile.<init>(DexFile.java:75)
    at dalvik.system.DexPathList.loadDexFile(DexPathList.java:394)
    at dalvik.system.DexPathList.makeDexElements(DexPathList.java:354)
    at dalvik.system.DexPathList.<init>(DexPathList.java:164)
    at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:74)
    at dalvik.system.BaseDexClassLoader.<init>(BaseDexClassLoader.java:65)
    at dalvik.system.PathClassLoader.<init>(PathClassLoader.java:64)
    at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:73)
    at com.android.internal.os.ClassLoaderFactory.createClassLoader(ClassLoaderFactory.java:88)
    at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:74)
    at android.app.ApplicationLoaders.getClassLoader(ApplicationLoaders.java:40)
    at android.app.LoadedApk.createOrUpdateClassLoaderLocked(LoadedApk.java:727)
    at android.app.LoadedApk.getClassLoader(LoadedApk.java:810)
    at android.app.LoadedApk.getResources(LoadedApk.java:1032)
    at android.app.ContextImpl.createAppContext(ContextImpl.java:2345)
    at android.app.ActivityThread.handleBindApplication(ActivityThread.java:5749)
    at android.app.ActivityThread.access$1100(ActivityThread.java:199)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1650)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:193)
    at android.app.ActivityThread.main(ActivityThread.java:6669)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)

解决方案是在我的AndroidManifest.xml 的<application> 部分中包含以下行：

<uses-library android:name="org.apache.http.legacy" android:required="false"/>

https://developer.android.com/about/versions/pie/android-9.0-changes-28#apache-p 对此进行了解释。