我正在尝试测试 google mobile vision api，用于人脸检测，所以我从GitHub mobile vision的演示开始。我尝试了这两个应用程序，FaceTracker 和 photo-demo，下载本地人脸检测器库也出现了同样的问题。
对于 Nexus 5x，Galaxy S6 Edge 不工作，Galaxy S4，Galaxy Alpha 工作。
当不工作时，我在日志中看到的是：
对于应用程序：
05-19 17:52:07.301 14909-14909/com.google.android.gms.samples.vision.face.photo W/System: ClassLoader referenced unknown path: /data/app/com.google.android.gms.samples.vision.face.photo-1/lib/arm64
05-19 17:52:07.725 14909-14909/com.google.android.gms.samples.vision.face.photo W/System: ClassLoader referenced unknown path: /data/app/com.google.android.gms.samples.vision.face.photo-1/lib/arm64
05-19 17:52:08.043 14909-14909/com.google.android.gms.samples.vision.face.photo D/ChimeraCfgMgr: Reading stored module config
05-19 17:52:08.068 14909-14909/com.google.android.gms.samples.vision.face.photo W/System: ClassLoader referenced unknown path: /data/user/0/com.google.android.gms/app_chimera/m/00000001/n/arm64-v8a
05-19 17:52:08.077 14909-14909/com.google.android.gms.samples.vision.face.photo D/ChimeraFileApk: Primary ABI of requesting process is arm64-v8a
05-19 17:52:08.079 14909-14909/com.google.android.gms.samples.vision.face.photo D/ChimeraFileApk: Classloading successful. Optimized code found.
05-19 17:52:08.105 14909-14909/com.google.android.gms.samples.vision.face.photo I/FaceDetectorCreatorImpl: Requesting download for vision face detector
05-19 17:52:08.107 14909-14909/com.google.android.gms.samples.vision.face.photo W/FaceDetectorHandle: Native face detector not yet available. Reverting to no-op detection.
05-19 17:52:08.253 14909-14909/com.google.android.gms.samples.vision.face.photo W/PhotoViewerActivity: Face detector dependencies are not yet available.
05-19 17:52:08.263 14909-14941/com.google.android.gms.samples.vision.face.photo D/OpenGLRenderer: Use EGL_SWAP_BEHAVIOR_PRESERVED: true
05-19 17:52:08.312 14909-14941/com.google.android.gms.samples.vision.face.photo I/Adreno: QUALCOMM build : 63c06b2, I8366cd0437
Build Date : 12/06/15
OpenGL ES Shader Compiler Version: XE031.05.13.02
Local Branch : mybranch17112971
Remote Branch : quic/LA.BF64.1.2.9_v2
Remote Branch : NONE
Reconstruct Branch : NOTHING
05-19 17:52:08.317 14909-14941/com.google.android.gms.samples.vision.face.photo I/OpenGLRenderer: Initialized EGL, version 1.4
在对日志进行一些挖掘之后，通过对我看到的标签应用视觉过滤器：
05-19 17:52:08.124 10421-10526/? I/Vision: Attempting to open download_details.json in com.google.android.gms.vision
05-19 17:52:08.125 10421-10526/? W/Vision: Failed to open download_details.json in com.google.android.gms.vision: android.content.pm.PackageManager$NameNotFoundException: com.google.android.gms.vision
05-19 17:52:08.126 10421-10526/? I/Vision: Attempting to open download_details.json in com.google.android.gms.policy_ccocr_vision
05-19 17:52:08.127 10421-10526/? W/Vision: Failed to open download_details.json in com.google.android.gms.policy_ccocr_vision: android.content.pm.PackageManager$NameNotFoundException: com.google.android.gms.policy_ccocr_vision
05-19 17:52:08.127 10421-10526/? W/Vision: Reading download details from hard-coded Java
05-19 17:52:08.443 10421-10526/? E/Vision: Download Failed: Status{statusCode=Download errored: The download was configured incorrectly., resolution=null}
类似的问题：
尝试了释放空间，清除缓存的解决方案，没有结果。
下一步我能做什么？是否可以手动下载库？有没有人清楚地表明为什么图书馆没有下载？
编辑
因此，Mobile Vision api https://github.com/googlesamples/android-vision/issues/98似乎存在问题。希望开发人员尽快提出解决方案。
编辑
该问题已通过更新播放服务库得到解决。