gekko: PermissionError: [Errno 13] Permission denied

[jeryjs]

Chaquopy version

14.0.2

Devices or emulators where the issue happens

SM-M526B - API 33 (arm-v8a)
Android Studio Emulator - API 34 (x86_64)
Android Studio Emulator - API 29 (x86)

Relevant parts of your code

build.gradle:

defaultConfig {
        applicationId "com.jery.feedformulation6"
        minSdk 24
        targetSdk 34
        versionCode 11
        versionName "1.0"

        // Python setup
        ndk {
            abiFilters "armeabi-v7a", "arm64-v8a", "x86", "x86_64"
        }
        python {
            pip {
                install "gekko"
                install "numpy"
            }
        }
    }

MainActivity.kt:

            if (! Python.isStarted()) { Python.start(AndroidPlatform(this)); }
            val data = Optimize(obj, cp, tdn, ca, ph, per)

            val py = Python.getInstance()
            val solver = py.getModule("optimization")

            try {
                val pyobj = solver.callAttr("optimization")
                string += "\n\nRESULT: $pyobj"
            } catch (e: PyException) {
                e.printStackTrace()
                string += "\n\nERROR: $e"
                Toast.makeText(this, e.message, Toast.LENGTH_LONG).show()
            }

            string  += "\n\nDATA:${data.obj}"
            binding.tvLog.text = string

And in manifest, I've given these permissions-

    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

Describe your issue

I have a calculation in python using the gekko library and I need to use its result in my android app (written in kotlin).
I tested an example with matplotlib and it works just fine, but when I try getting the result for my calculation using gekko, i get the error com.chaquo.python.PyException: PermissionError: [Errno 13] Permission denied: '/data/data/com.jery.feedformulation6.debugXML/files/chaquopy/AssetFinder/requirements/gekko/bin/apm'

Stack Trace (here, optimization.py is my file with the calculation using gekko library):

10:52:35.501 System.err     W  com.chaquo.python.PyException: PermissionError: [Errno 13] Permission denied: '/data/data/com.jery.feedformulation6.debugXML/files/chaquopy/AssetFinder/requirements/gekko/bin/apm'
10:52:35.501 System.err     W  	at <python>.subprocess._execute_child(subprocess.py:1704)
10:52:35.501 System.err     W  	at <python>.subprocess.__init__(subprocess.py:858)
10:52:35.501 System.err     W  	at <python>.gekko.gekko.solve(gekko.py:2097)
10:52:35.502 System.err     W  	at <python>.optimization.optimization(optimization.py:38)
10:52:35.503 System.err     W  	at <python>.chaquopy_java.call(chaquopy_java.pyx:354)
10:52:35.503 System.err     W  	at <python>.chaquopy_java.Java_com_chaquo_python_PyObject_callAttrThrowsNative(chaquopy_java.pyx:326)
10:52:35.503 System.err     W  	at com.chaquo.python.PyObject.callAttrThrowsNative(Native Method)
10:52:35.504 System.err     W  	at com.chaquo.python.PyObject.callAttrThrows(PyObject.java:232)
10:52:35.504 System.err     W  	at com.chaquo.python.PyObject.callAttr(PyObject.java:221)
10:52:35.505 System.err     W  	at com.jery.feedformulation6.ui.activities.FeedsSelection.onCreate$lambda$0(FeedsSelection.kt:81)
10:52:35.506 System.err     W  	at com.jery.feedformulation6.ui.activities.FeedsSelection.$r8$lambda$_9HgehKjBc5jWdqwGBEpBJxp6V4(Unknown Source:0)
10:52:35.506 System.err     W  	at com.jery.feedformulation6.ui.activities.FeedsSelection$$ExternalSyntheticLambda0.onClick(Unknown Source:4)
10:52:35.507 System.err     W  	at android.view.View.performClick(View.java:7659)
10:52:35.507 System.err     W  	at android.view.View.performClickInternal(View.java:7636)
10:52:35.507 System.err     W  	at android.view.View.-$$Nest$mperformClickInternal(Unknown Source:0)
10:52:35.508 System.err     W  	at android.view.View$PerformClick.run(View.java:30144)
10:52:35.508 System.err     W  	at android.os.Handler.handleCallback(Handler.java:958)
10:52:35.509 System.err     W  	at android.os.Handler.dispatchMessage(Handler.java:99)
10:52:35.510 System.err     W  	at android.os.Looper.loopOnce(Looper.java:205)
10:52:35.510 System.err     W  	at android.os.Looper.loop(Looper.java:294)
10:52:35.510 System.err     W  	at android.app.ActivityThread.main(ActivityThread.java:8170)
10:52:35.510 System.err     W  	at java.lang.reflect.Method.invoke(Native Method)
10:52:35.510 System.err     W  	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:552)
10:52:35.511 System.err     W  	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:971)

[mhsmith]

Unfortunately I don't think there's any easy way to use this package on Android. It bundles some executables for Linux, Mac and Windows, but not for Android. And an Android executable wouldn't work anyway, because of #605.

If anyone else wants this package too, let us know by clicking the thumbs-up button above.

[jeryjs]

I see...
I was able to get the app to finally work by setting remote=true in my .py file

Now it works, but just the time it takes to solve is too long rn (it takes abt 10-15 secs while remote=true but less than a second otherwise).