Question

当我在我的Android应用程序中集成Cardboard时出现以下错误。（我在Samsung S6 / Note 3 / Nexus 6上运行它）

... D/CardboardViewNativeImpl﹕ NativeProxy not found
... D/CardboardViewNativeImpl﹕ Loading native library vrtoolkit
... D/CardboardViewNativeImpl﹕ Native library loaded
... W/art﹕ Attempt to remove local handle scope entry from IRT, ignoring
... W/art﹕ Attempt to remove local handle scope entry from IRT, ignoring
... W/art﹕ Attempt to remove local handle scope entry from IRT, ignoring
... A/art﹕ art/runtime/check_jni.cc:65] JNI DETECTED ERROR IN APPLICATION: GetMethodID received null jclass
... A/art﹕ art/runtime/check_jni.cc:65]     in call to GetMethodID
... A/art﹕ art/runtime/check_jni.cc:65]     from long com.google.vrtoolkit.cardboard.CardboardViewNativeImpl.nativeInit(int, int, float, float, float, long)
... A/art﹕ art/runtime/check_jni.cc:65] "main" prio=5 tid=1 Runnable
... A/art﹕ art/runtime/check_jni.cc:65]   | group="main" sCount=0 dsCount=0 obj=0x73617000 self=0xb4827800
... A/art﹕ art/runtime/check_jni.cc:65]   | sysTid=24304 nice=0 cgrp=default sched=0/0 handle=0xb6f04bec
... A/art﹕ art/runtime/check_jni.cc:65]   | state=R schedstat=( 1668176075 289166273 1700 ) utm=148 stm=18 core=1 HZ=100
... A/art﹕ art/runtime/check_jni.cc:65]   | stack=0xbe04a000-0xbe04c000 stackSize=8MB
... A/art﹕ art/runtime/check_jni.cc:65]   | held mutexes= "mutator lock"(shared held)

我还添加了abiFilters，因为cardbaord.jar文件只有armeabi-v7a的.so文件。但仍然得到错误。

buildTypes {
debug {
    ...
        ndk {
            abiFilters "armeabi-v7a" // includes ARM SO files only, so no x86 SO file
        }
    }

我能够创建一个独立的cardbaord应用程序并在所有三个设备上运行它而不会出现问题，只有当我与现有应用程序集成时才会在运行时失败。

Answer 1

我有这个完全相同的问题，当它是独立的时它可以工作，但是当我将它集成到现有应用程序时，“GetMethodID收到null jclass”会中断。

事实证明我在集成应用程序中启用了ProGuard，添加了以下规则修复它：

-keep class com.google.vrtoolkit.cardboard.** { *; }

Answer 2

对于新的Cardboard SDK 0.8.0，我必须添加以下ProGuard规则：

-keep class com.google.vr.**
-keepclassmembers class com.google.vr.** { *; }
-keep class com.google.vr.**$*
-keepclassmembers class com.google.vr.**$* { *; }
-keep class com.google.geo.render.**
-keepclassmembers class com.google.geo.render.** { *; }

# Also keept this rule, just in case (probably only needed for 0.7.0)
-keep class com.google.vrtoolkit.cardboard.** { *; }

我有点匆忙，因为那可能我已经太过保守＆＃34;关于规则。我已经在 panowidget （静态图片）和视频聊天（视频）示例中进行了检查，它在两种情况下都有效。

Android，谷歌纸板运行时JNI失败

2 个答案: