Android - Issue when trying to integrate with new app

[shbkrm]

I have created a new Android app.
Modified the SNOWBOYDETECTJAVAPKG and SNOWBOYDETECTJAVAPKGDIR in makefile accordingly.
Generated .so file added the same in jniLibs, modified gradle file. The .so file is picked up properly ( was able to see it when I extract the .apk file)
When I run the app,

I get the below error

E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.graspio.myapplication, PID: 25560
java.lang.UnsatisfiedLinkError: No implementation found for long com.graspio.myapplication.snowboyJNI.new_SnowboyDetect(java.lang.String, java.lang.String) (tried Java_com_graspio_myapplication_snowboyJNI_new_1SnowboyDetect and Java_com_graspio_myapplication_snowboyJNI_new_1SnowboyDetect__Ljava_lang_String_2Ljava_lang_String_2)
at com.graspio.myapplication.snowboyJNI.new_SnowboyDetect(Native Method)
at com.graspio.myapplication.SnowboyDetect.(SnowboyDetect.java:0)
at com.graspio.myapplication.audio.RecordingThread.(RecordingThread.java:38)
at com.graspio.myapplication.MainActivity.onCreate(MainActivity.java:18)
at android.app.Activity.performCreate(Activity.java:6672)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1140)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2612)
at

I checked the generated snowboy-detect-swig.cc file, in which the function "Java_com_graspio_myapplication_snowboyJNI_new_1SnowboyDetect" is present

[xuchen]

Were you able to compile the default Android demo under examples/Android/SnowboyAlexaDemo OK? What's your target CPU for Android? Armv7, v8, x86, or MIPS? Could you please list your link directories after you make the swig compile?

Could you do:

cd Android/SnowboyAlexaDemo
tree src

I have output:

src
├── ai
│   └── kitt
│       └── snowboy
│           ├── AppResCopy.java
│           ├── Constants.java
│           ├── Demo.java
│           ├── MsgEnum.java
│           ├── SnowboyDetect.java -> ../../../../../../../swig/Android/java/ai/kitt/snowboy/SnowboyDetect.java
│           ├── audio
│           │   ├── AudioDataReceivedListener.java
│           │   ├── AudioDataSaver.java
│           │   ├── PlaybackThread.java
│           │   └── RecordingThread.java
│           └── snowboyJNI.java -> ../../../../../../../swig/Android/java/ai/kitt/snowboy/snowboyJNI.java
└── main
    └── jniLibs -> ../../../../../swig/Android/jniLibs

You have to make sure all files are linked properly.

[shbkrm]

I am able to compile and run demo app. It runs perfectly.
The issue is when I try to create a new app and integrate the snowboy code to it.
Below is my output

app/src
├── androidTest
│   └── java
│   └── com
│   └── graspio
│   └── hotwordavs
│   └── ExampleInstrumentedTest.java
├── main
│   ├── AndroidManifest.xml
│   ├── cpp
│   │   └── native-lib.cpp
│   ├── java
│   │   └── com
│   │   └── graspio
│   │   └── hotwordavs
│   │   ├── AppResCopy.java
│   │   ├── Constants.java
│   │   ├── MainActivity.java
│   │   ├── MsgEnum.java
│   │   ├── SnowboyDetect.java -> ../../../../../../../swig/Android/java/ai/kitt/snowboy/SnowboyDetect.java
│   │   ├── audio
│   │   │   ├── AudioDataReceivedListener.java
│   │   │   ├── AudioDataSaver.java
│   │   │   ├── PlaybackThread.java
│   │   │   └── RecordingThread.java
│   │   ├── snowboy.java
│   │   └── snowboyJNI.java -> ../../../../../../../swig/Android/java/ai/kitt/snowboy/snowboyJNI.java
│   ├── jniLibs
│   │   └── armeabi-v7a
│   │   └── libsnowboy-detect-android.so
│   └── res
│   ├── drawable
│   ├── layout
│   │   └── activity_main.xml
│   ├── mipmap-hdpi
│   │   ├── ic_launcher.png
│   │   └── ic_launcher_round.png
│   ├── mipmap-mdpi
│   │   ├── ic_launcher.png
│   │   └── ic_launcher_round.png
│   ├── mipmap-xhdpi
│   │   ├── ic_launcher.png
│   │   └── ic_launcher_round.png
│   ├── mipmap-xxhdpi
│   │   ├── ic_launcher.png
│   │   └── ic_launcher_round.png
│   ├── mipmap-xxxhdpi
│   │   ├── ic_launcher.png
│   │   └── ic_launcher_round.png
│   └── values
│   ├── colors.xml
│   ├── strings.xml
│   └── styles.xml
└── test
└── java
└── com
└── graspio
└── hotwordavs
└── ExampleUnitTest.java

[xuchen]

Maybe this won't solve the issue, but shouldn't you put libsnowboy-detect-android.so under the armeabi-v7a folder?

[shbkrm]

libsnowboy-detect-android.so is present under armeabi-v7a folder.
The formatting is getting disturbed when copy paste from the terminal.

[xuchen]

It still looks like a linking problem for me. This could come from two sources: either swig is wrong (version 3.0.10 and above is required), or the .so file doesn't get incorporated in Android Studio (even though it packaged it).

[shbkrm]

Am using latest swig version.
May be .so file is not Incorporated. How can I validate it from my end?

[xuchen]

did it appear in the build/intermediates folder? if yes, then it should be fine...

[shbkrm]

It is present in build/intermediates/jniLibs/debug/armeabi-v7a
The swig version which I have us 3.0.12

[xuchen]

Good news is that you can compile the Android Alexa demo. I guess the rest is that you'll have to compare 2 projects head by head to dig out what went wrong. I'll ping back once I run into something similar.

[aspratyush]

@shuaibakram This works fine if one creates soft links to SnowboyDetect.java and snowboyJNI.java as per their project structure and modifies the Makefile accordingly. For e.g., in your case:

1. soft links should point java/com/graspio/hotwordavs.

SnowboyDetect.java -> ../../../../../../../swig/Android/java/com/graspio/hotwordavs/SnowboyDetect.java
snowboyJNI.java -> ../../../../../../../swig/Android/java/com/graspio/hotwordavs/snowboyJNI.java
jniLibs -> ../../../../../../../swig/Android/jniLibs

2. Modify Makefile to point to java/com/graspio/hotwordavs and packagename : com.graspio.hotwordavs

[ankitmaisuriya]

Hi..Please help me out to integrate the Snowboy wakeword demo app with my android application..SnowboyALexaDemo is working very fine..But how to integrate with my current android application to use alexa wakeword..
I am beginner in this..Please help me out.
Any sample application sample is great to understand for me.
Thanks

[lovish888]

@shuaibakram How can I create soft links. Can you please explain? Thanks.

[lovish888]

@xuchen I am able to run Android SnowboyAlexaDemo and it works perfectly but how can I integrate it into some other Android project with different package name than 'ai.kitt.snowboy'. Please help. Thanks.

[chenguoguo]

I submitted a PR for it, hopefully it resolves the issue.

[oth-libs]

For people still facing the same issue, I found the solution, it's not a problem per se, because the files generated are symlinked, which HAVE to be symlinked in your own project as well.

• don't create your own jniLibs but instead create a symbolic link (on mac):
  ln -s "/path to/Snowboy/swig/Android/jniLibs" "/path to your app/app/src/main/"
• DON'T COPY the java files, instead create a symbolic link for them as well, same as above.
• USE ABSOLUTE PATHS AND NOT RELATIVE PATHS otherwise you'll face the error 'Too many levels of symbolic links'

it should now work. the whole idea is to use the files generated and not copy them into your own project.

not sure if I explained this properly so if not please let me know.