[zeromq-dev] Zyre on Android (JNI)

[Pieter Hintjens]

Since the JNI code is generated I can do this automatically once I've
got the right list of libraries to open.

On Wed, Jan 6, 2016 at 6:01 PM, Joe McIlvain <joe.eli.mac at gmail.com> wrote:
> What Utsav says sounds right, but from what little I remember, it was called
> `dlopen`.  You need to separately `dlopen` each library yourself (libsodium,
> libzmq, czmq, zyre).  I remember having to coax Qt into doing this
> correctly.
>
> On Wed, Jan 6, 2016 at 7:07 AM, Utsav Drolia <utsavdrolia at gmail.com> wrote:
>>
>> I think you would have to do a “System.loadLibrary()” in the app, for
>> every C-library the app refers to.
>> Or is that taken care of in the zyre library itself?
>>
>> Utsav
>>
>> > On Jan 6, 2016, at 9:20 AM, Arnaud Loonstra <arnaud at sphaero.org> wrote:
>> >
>> > Ok, I played with android studio a bit. Djeez, these dependencies fill
>> > my harddrive faster than I can empty. :S
>> >
>> > Anyway, just build a simple app and ran it on a emulator:
>> > Unfortunately, ZyreTest has stopped
>> >
>> > It seems it can't find the czmq libs?
>> >
>> > 01-06 15:15:20.295 1257-1257/org.z25.zyretest I/art: Not late-enabling
>> > -Xcheck:jni (already on)
>> > 01-06 15:15:20.296 1257-1257/org.z25.zyretest I/art: Late-enabling JIT
>> > 01-06 15:15:20.701 1257-1257/org.z25.zyretest I/art: JIT created with
>> > code_cache_capacity=2MB compile_threshold=1000
>> > 01-06 15:15:23.956 1257-1257/org.z25.zyretest D/AndroidRuntime:
>> > Shutting down VM
>> > 01-06 15:15:23.996 1257-1257/org.z25.zyretest E/AndroidRuntime: FATAL
>> > EXCEPTION: main
>> >
>> > Process: org.z25.zyretest, PID: 1257
>> >
>> > java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol
>> > "zsys_handler_set" referenced by
>> > "/data/app/org.z25.zyretest-1/lib/arm/libzyrejni.so"...
>> >                                                                     at
>> > java.lang.Runtime.loadLibrary(Runtime.java:372)
>> >                                                                     at
>> > java.lang.System.loadLibrary(System.java:1076)
>> >                                                                     at
>> > org.zeromq.zyre.Zyre.<clinit>(Zyre.java:13)
>> >                                                                     at
>> > org.z25.zyretest.ZyreTest.onCreate(ZyreTest.java:15)
>> >                                                                     at
>> > android.app.Activity.performCreate(Activity.java:6237)
>> >                                                                     at
>> >
>> > android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
>> >                                                                     at
>> >
>> > android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
>> >                                                                     at
>> >
>> > android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
>> >                                                                     at
>> > android.app.ActivityThread.-wrap11(ActivityThread.java)
>> >                                                                     at
>> > android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
>> >                                                                     at
>> > android.os.Handler.dispatchMessage(Handler.java:102)
>> >                                                                     at
>> > android.os.Looper.loop(Looper.java:148)
>> >                                                                     at
>> > android.app.ActivityThread.main(ActivityThread.java:5417)
>> >                                                                     at
>> > java.lang.reflect.Method.invoke(Native Method)
>> >                                                                     at
>> >
>> > com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
>> >                                                                     at
>> > com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
>> > 01-06 15:15:53.015 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 20.768ms
>> > 01-06 15:16:49.526 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.354ms
>> > 01-06 15:16:54.523 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.210ms
>> > 01-06 15:16:58.523 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.207ms
>> > 01-06 15:18:08.166 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.199ms
>> > 01-06 15:18:11.163 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.218ms
>> > 01-06 15:18:17.163 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.194ms
>> > 01-06 15:18:19.163 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 10.227ms
>> > 01-06 15:19:00.201 1257-1264/org.z25.zyretest W/art: Suspending all
>> > threads took: 25.579ms
>> >
>> > Here's my source:
>> >
>> > package org.z25.zyretest;
>> >
>> > import android.support.v7.app.AppCompatActivity;
>> > import android.os.Bundle;
>> > import org.zeromq.zyre.Zyre;
>> >
>> > public class ZyreTest extends AppCompatActivity {
>> >
>> >     public Zyre znode;
>> >
>> >     @Override
>> >     protected void onCreate(Bundle savedInstanceState) {
>> >         super.onCreate(savedInstanceState);
>> >         setContentView(R.layout.activity_zyre_test);
>> >         znode = new Zyre("AndroidTest");
>> >         znode.start();
>> >     }
>> >
>> >     @Override
>> >     public void onDestroy()
>> >     {
>> >         super.onDestroy();
>> >         znode.stop();
>> >     }
>> > }
>> > _______________________________________________
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>> > zeromq-dev at lists.zeromq.org
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>>
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