To access the data packed inside the .apk package on Android in your C++ code, we need to get the path to .apk by using Java code and passing the result into our C++ code using JNI.
In the onCreate() method, pass the value obtained from getApplication().getApplicationInfo().sourceDir into our native code:
@Override protected void onCreate( Bundle icicle )
{
onCreateNative( getApplication().getApplicationInfo().sourceDir );
}
public static native void onCreateNative( String APKName );The implementation of onCreateNative() can be found in 1_ArchiveFileAccess\jni\Wrappers.cpp and looks as follows:
extern "C"
{
JNIEXPORT void JNICALL
Java_com_packtpub_ndkmastering_AppActivity_onCreateNative( JNIEnv* env, jobject obj, jstring APKName )
{
g_APKName = ConvertJString( env, APKName );
LOGI( "APKName = %s", g_APKName.c_str() );
OnStart( g_APKName );
}
}We use the ConvertJString() function to convert jstring into std::string...