How to build app with Superpowered lib for NDK less than 23?

Question

I built superpowered example app located here: https://github.com/superpoweredSDK/Low-Latency-Android-Audio-iOS-Audio-Engine/blob/master/Android/CrossExample/

But when I tried to run on a phone (API16) - I got this error:

01-14 12:53:51.906 7800-7800/? E/AndroidRuntime: FATAL EXCEPTION: main
                                             java.lang.ExceptionInInitializerError
                                                 at java.lang.Class.newInstanceImpl(Native Method)
                                                 at java.lang.Class.newInstance(Class.java:1319)
                                                 at android.app.Instrumentation.newActivity(Instrumentation.java:1068)
                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2022)
                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2132)
                                                 at android.app.ActivityThread.access$700(ActivityThread.java:140)
                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238)
                                                 at android.os.Handler.dispatchMessage(Handler.java:99)
                                                 at android.os.Looper.loop(Looper.java:137)
                                                 at android.app.ActivityThread.main(ActivityThread.java:4918)
                                                 at java.lang.reflect.Method.invokeNative(Native Method)
                                                 at java.lang.reflect.Method.invoke(Method.java:511)
                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
                                                 at dalvik.system.NativeStart.main(Native Method)
                                              Caused by: java.lang.UnsatisfiedLinkError: Cannot load library: reloc_library[1307]:   133 cannot locate 'strtof'...

                                                 at java.lang.Runtime.loadLibrary(Runtime.java:370)
                                                 at java.lang.System.loadLibrary(System.java:535)
                                                 at com.superpowered.crossexample.MainActivity.<clinit>(MainActivity.java:125)
                                                 at java.lang.Class.newInstanceImpl(Native Method) 
                                                 at java.lang.Class.newInstance(Class.java:1319) 
                                                 at android.app.Instrumentation.newActivity(Instrumentation.java:1068) 
                                                 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2022) 
                                                 at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2132) 
                                                 at android.app.ActivityThread.access$700(ActivityThread.java:140) 
                                                 at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1238) 
                                                 at android.os.Handler.dispatchMessage(Handler.java:99) 
                                                 at android.os.Looper.loop(Looper.java:137) 
                                                 at android.app.ActivityThread.main(ActivityThread.java:4918) 
                                                 at java.lang.reflect.Method.invokeNative(Native Method) 
                                                 at java.lang.reflect.Method.invoke(Method.java:511) 
                                                 at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994) 
                                                 at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761) 
                                                 at dalvik.system.NativeStart.main(Native Method)

I tried to change ndk version to build:

  android.ndk {
        platformVersion = 15
}

And got this error on build:

    /Volumes/iMect/iphone/SuperpoweredSource/decoder/SuperpoweredDecoder.cpp:549: error: undefined reference to 'strtof'
/Volumes/iMect/iphone/SuperpoweredSource/net/net.cpp:69: error: undefined reference to 'signal'
/Volumes/iMect/iphone/SuperpoweredSource/net/net.cpp:69: error: undefined reference to 'signal'
clang++.exe: error: linker command failed with exit code 1 (use -v to see invocation)

Also I made changes into gradle.build file to make build possible using AndroidStudio 2.1

Added line toolchain "clang",and added flag -fno-exceptions instead of -fexceptions

android.ndk {
        toolchain "clang"
      cppFlags.addAll(["-fno-exceptions", "-fsigned-char", "-I${superpowered_sdk_path}".toString()])

}

score 3 · Accepted Answer · edited May 23 '17 at 11:48

3

An update of the library has been released! Use the last version of superpoweredSDK and everything will be fine. Gabor Szanto said(How to build app with Superpowered lib for NDK less than 23?) that it's good from 16, I tested on my device and it compiled and ran without any errors.

edited May 23 '17 at 11:48

Community

1
1

answered May 27 '16 at 16:17

Kirill Akhmetov

318
4
12

score 1 · Answer 2 · answered May 23 '16 at 06:26

1

The android.ndk.platformVersion setting in the build gradle doesn't limit your application to run on older devices. It just sets which NDK version to build with. You can safely set it to 23 (Android 6.0 Marshmallow), and your application will still run on devices with older versions of Android.

The android.defaultConfig.minSdkVersion.apiLevel setting does set your Android app's lower limit, but it's an Android SDK setting, not related to the NDK. You can set that to any lower value, down to 11 (NDK and OpenSL ES appeared with 11). I recommend 19 (4.4 KitKat), because it's the first Android version with proper scheduling for audio. 75% of all active devices today are compatible with that.

answered May 23 '16 at 06:26

Gabor Szanto

1,329
8
12

Anyway it doesn't run on Adndroid 15. – Kirill Akhmetov May 23 '16 at 13:31
And if i set NDK Version to 19 it gives the same error. – Kirill Akhmetov May 23 '16 at 21:42
Runtime - if I build using platformVersion=23, and build error if I'm using pltformVersion less than 23 – Kirill Akhmetov May 24 '16 at 08:50
Maybe this is the answer http://stackoverflow.com/a/25566866/4239699 I'm going to check it later – Kirill Akhmetov May 24 '16 at 08:50
I think i will release a new version soon, which will be built on platform 16. We receive incompatibility problems from other sources as well. – Gabor Szanto May 24 '16 at 09:20
1

The update is available now, this issue is resolved. You are good from Android 16, which covers 95% of all active Android devices (according to the Google dashboard today). – Gabor Szanto May 27 '16 at 14:24

How to build app with Superpowered lib for NDK less than 23?

2 Answers2