Android ICS 4.0 NDK NewStringUTF is crashing down the App

Question

I have a method in JNI C/C++ which takes jstring and returns back jstring some thing like as below,

  NATIVE_CALL(jstring, method)(JNIEnv * env, jobject obj         


        

Answer 1

In my opinion, its not a bug.

NewStringUTF Constructs a new java.lang.String object from an array of characters in modified UTF-8 encoding.

Modified UTF-8 is not standard UTF-8. See Modified UTF-8

In most cases, UTF-8 encoded string is valid Modified UTF-8. Because Modified UTF-8 and UTF-8 are quite similar. However when it comes to Unicode string beyond Basic Multilingual Plane, they are not compatible.

Solution: pass UTF-8 bytes to Java layer and new String(bytes, "UTF-8") then pass jstring to JNI.