oboe-experiment.patch

diff --git a/samples/hello-oboe/src/main/cpp/jni_bridge.cpp b/samples/hello-oboe/src/main/cpp/jni_bridge.cpp
index 893d641..e97c85a 100644
--- a/samples/hello-oboe/src/main/cpp/jni_bridge.cpp
+++ b/samples/hello-oboe/src/main/cpp/jni_bridge.cpp
@@ -20,6 +20,7 @@
 #include "logging_macros.h"
 
 extern "C" {
+JavaVM *vm;
 
 /**
  * Creates the audio engine
@@ -30,6 +31,9 @@ JNIEXPORT jlong JNICALL
 Java_com_google_oboe_samples_hellooboe_PlaybackEngine_native_1createEngine(
         JNIEnv *env,
         jclass /*unused*/) {
+    env->GetJavaVM(&vm);
+    auto cls = env->FindClass("androidx/constraintlayout/widget/ConstraintLayout");
+    assert(cls);
 
     // We use std::nothrow so `new` returns a nullptr if the engine creation fails
     HelloOboeEngine *engine = new(std::nothrow) HelloOboeEngine();
diff --git a/samples/shared/DefaultDataCallback.h b/samples/shared/DefaultDataCallback.h
index e7f858e..0b1b414 100644
--- a/samples/shared/DefaultDataCallback.h
+++ b/samples/shared/DefaultDataCallback.h
@@ -24,6 +24,9 @@
 
 #include "IRenderableAudio.h"
 #include "IRestartable.h"
+#include <jni.h>
+
+extern "C" JavaVM *vm;
 
 /**
  * This is a callback object which will render data from an `IRenderableAudio` source.
@@ -35,6 +38,11 @@ public:
 
     virtual oboe::DataCallbackResult
     onAudioReady(oboe::AudioStream *oboeStream, void *audioData, int32_t numFrames) override {
+        JNIEnv *env;
+        if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) == JNI_EDETACHED)
+            vm->AttachCurrentThread(&env, nullptr);
+        auto cls = env->FindClass("androidx/constraintlayout/widget/ConstraintLayout");
+        assert(cls);
 
         if (mIsThreadAffinityEnabled && !mIsThreadAffinitySet) {
             setThreadAffinity();