Added Java loadLibrary to Android plugin to support pyjnius (#128)

* pyjnius support

* Install Flutter 3.24

* Test on iOS only

* Try Flutter 3.24.5

* flutter doctor

* Call flutter doctor after FVM

* Run all jobs

* MAIN_ACTIVITY_JAVA_CLASS_NAME env var

* Renamed to MAIN_ACTIVITY_HOST_CLASS_NAME

* Package version bumped to 0.8.5

Author: FeodorFitsner

.appveyor.yml

@@ -1,6 +1,7 @@
 skip_branch_with_pr: true
 
 environment:
+  FLUTTER_VERSION: 3.24.5
   GITHUB_TOKEN:
     secure: 9SKIwc3VSfYJ5IChvNR74mEv2nb0ZFftUzn3sGRdXipXEfKSxY50DoodChHvlqZduQNhjg0oyLWAAa3n+iwWvVM2yI7Cgb14lFNClijz/kHI/PibnjDMNvLKaAygcfAc
 
@@ -51,9 +52,9 @@ for:
 
     install:
       - HOMEBREW_NO_AUTO_UPDATE=1 brew install cocoapods
-      - flutter upgrade
+      - source ci/install_flutter.sh
       - flutter config --enable-macos-desktop
-      - flutter doctor
+      - flutter doctor -v
 
     build: off
 
@@ -72,16 +73,14 @@ for:
 
     install:
       - HOMEBREW_NO_AUTO_UPDATE=1 brew install cocoapods
-      - flutter upgrade
-      - flutter config --enable-macos-desktop
+      - source ci/install_flutter.sh
       # - xcrun simctl list runtimes
       # - xcrun simctl create "e2e test" "iPhone 12" "com.apple.CoreSimulator.SimRuntime.iOS-17-2"
       # - xcrun xctrace list devices
       # - |
       #     UDID=$(xcrun xctrace list devices | grep "^e2e test Simulator (17.2)" | awk '{gsub(/[()]/,""); print $NF}')      
       #     echo $UDID
       #     xcrun simctl boot "${UDID:?No Simulator with this name found}"
-      #- flutter doctor -v
 
     build: off
 
@@ -117,8 +116,7 @@ for:
       - sudo chown $USER /dev/kvm
       - emulator -avd "${DEVICE_NAME}" -memory 2048 -wipe-data -no-boot-anim -cache-size 1000 -noaudio -no-window -partition-size 8192 &
       - adb wait-for-device shell 'while [[ -z $(getprop dev.bootcomplete) ]]; do sleep 1; done;'
-      - flutter upgrade --force
-      - flutter doctor -v
+      - source ci/install_flutter.sh
 
     build: off
 
@@ -141,7 +139,12 @@ for:
     #  VC_REDIST_DIR: 'C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Redist\MSVC\14.29.30133\x64\Microsoft.VC142.CRT'
 
     install:
-      - flutter upgrade --force
+      - dart pub global activate fvm
+      - set PATH=%LOCALAPPDATA%\Pub\Cache\bin;%USERPROFILE%\fvm\default\bin;%PATH%
+      - fvm install %FLUTTER_VERSION%
+      - fvm global %FLUTTER_VERSION%
+      - flutter --version
+      - flutter doctor
 
     build: off
 
@@ -161,7 +164,7 @@ for:
     install:
       - sudo apt update --allow-releaseinfo-change
       - sudo apt install -y xvfb libgtk-3-dev libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-bad1.0-dev gstreamer1.0-plugins-base gstreamer1.0-plugins-good gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav gstreamer1.0-doc gstreamer1.0-tools gstreamer1.0-x gstreamer1.0-alsa gstreamer1.0-gl gstreamer1.0-gtk3 gstreamer1.0-qt5 gstreamer1.0-pulseaudio
-      - flutter upgrade --force
+      - source ci/install_flutter.sh
 
     build: off
 
@@ -185,8 +188,7 @@ for:
       - sudo apt install -y clang ninja-build xvfb libgtk-3-dev gstreamer1.0-plugins-bad gstreamer1.0-plugins-ugly gstreamer1.0-libav
       - git clone https://github.com/flutter/flutter.git -b stable "$HOME/flutter"
       - export PATH="$PATH:$HOME/flutter/bin"
-      - flutter upgrade
-      - flutter doctor
+      - source ci/install_flutter.sh
 
     build: off
 

ci/install_flutter.sh

@@ -0,0 +1,6 @@
+dart pub global activate fvm
+export PATH=$HOME/.pub-cache/bin:$HOME/fvm/default/bin:$PATH
+fvm install $FLUTTER_VERSION
+fvm global $FLUTTER_VERSION
+flutter --version
+flutter doctor

src/serious_python/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.8.5
+
+* Added Java `loadLibrary` to Android plugin to support `pyjnius` ([#128](https://github.com/flet-dev/serious-python/issues/128)).
+
 ## 0.8.4
 
 * Copy `site-packages/flutter` contents to `SERIOUS_PYTHON_FLUTTER_PACKAGES`.

src/serious_python/example/flet_example/app/app.zip.hash

@@ -1 +1 @@
-cc3d88a7793723d9bdec03813d7a47d758276bef6e78107138fd0acb7d386fca
+43f8a7b00e44a09647dda36299259976950ba7259c5060de20677c449690fc73

src/serious_python/example/flet_example/pubspec.lock

@@ -482,42 +482,42 @@ packages:
       path: "../.."
       relative: true
     source: path
-    version: "0.8.2"
+    version: "0.8.4"
   serious_python_android:
     dependency: transitive
     description:
       path: "../../../serious_python_android"
       relative: true
     source: path
-    version: "0.8.2"
+    version: "0.8.4"
   serious_python_darwin:
     dependency: transitive
     description:
       path: "../../../serious_python_darwin"
       relative: true
     source: path
-    version: "0.8.2"
+    version: "0.8.4"
   serious_python_linux:
     dependency: transitive
     description:
       path: "../../../serious_python_linux"
       relative: true
     source: path
-    version: "0.8.2"
+    version: "0.8.4"
   serious_python_platform_interface:
     dependency: transitive
     description:
       path: "../../../serious_python_platform_interface"
       relative: true
     source: path
-    version: "0.8.2"
+    version: "0.8.4"
   serious_python_windows:
     dependency: transitive
     description:
       path: "../../../serious_python_windows"
       relative: true
     source: path
-    version: "0.8.2"
+    version: "0.8.4"
   shared_preferences:
     dependency: transitive
     description:

src/serious_python/example/run_example/app/app.zip.hash

@@ -1 +1 @@
-86fcefd284f101b084bfb8b72d9eebe97d65c880b1dc97a9b8719ed40c4a3e24
+081229a0c5551f4c29faa2b6e8a23cba9e971d66f95565892561898e146a5d5e

src/serious_python/example/run_example/app/src/main.py

@@ -1,10 +1,11 @@
 print("Hello from Python program!")
 
-import _imp
 import os
 from pathlib import Path
 from time import sleep
 
+import _imp
+
 _imp.extension_suffixes()
 
 print("HELLO!")
@@ -94,12 +95,14 @@ def test_sqlite():
         out_dir = Path(result_filename).parent
         conn = sqlite3.connect(str(out_dir.joinpath("mydb.db")))
 
-        conn.execute("""CREATE TABLE COMPANY
+        conn.execute(
+            """CREATE TABLE COMPANY
                 (ID INT PRIMARY KEY     NOT NULL,
                 NAME           TEXT    NOT NULL,
                 AGE            INT     NOT NULL,
                 ADDRESS        CHAR(50),
-                SALARY         REAL);""")
+                SALARY         REAL);"""
+        )
 
         conn.execute(
             "INSERT INTO COMPANY (ID,NAME,AGE,ADDRESS,SALARY) \
@@ -131,7 +134,34 @@ def test_sqlite():
         return f"\nsqlite: test_basic - error: {e}"
 
 
+def test_pyjnius():
+    from time import sleep
+
+    from jnius import autoclass
+
+    activity = autoclass(os.getenv("MAIN_ACTIVITY_HOST_CLASS_NAME")).mActivity
+    Secure = autoclass("android.provider.Settings$Secure")
+
+    version = autoclass("android.os.Build$VERSION")
+    os_build = autoclass("android.os.Build")
+    base_os = version.BASE_OS
+
+    DisplayMetrics = autoclass("android.util.DisplayMetrics")
+    metrics = DisplayMetrics()
+
+    return (
+        str(activity.getClass().getName())
+        + " os: "
+        + str(os_build)
+        + " FLET_JNI_READY: "
+        + str(os.getenv("FLET_JNI_READY"))
+        + " DPI: "
+        + str(metrics.getDeviceDensity())
+    )
+
+
 r += test_sqlite()
+r += test_pyjnius()
 # test_lru()
 # test_numpy_basic()
 # test_numpy_performance()

src/serious_python/example/run_example/app/src/requirements.txt

@@ -1,2 +1,3 @@
 #numpy
-lru-dict
+lru-dict
+pyjnius

src/serious_python/example/run_example/lib/main.dart

@@ -76,7 +76,7 @@ class _MyAppState extends State<MyApp> {
           title: const Text('Serious Python example app'),
         ),
         body: Center(
-          child: Text(_pyResult),
+          child: SelectableText(_pyResult),
         ),
       ),
     );

src/serious_python/example/run_example/pubspec.lock

@@ -296,42 +296,42 @@ packages:
       path: "../.."
       relative: true
     source: path
-    version: "0.8.1"
+    version: "0.8.4"
   serious_python_android:
     dependency: transitive
     description:
       path: "../../../serious_python_android"
       relative: true
     source: path
-    version: "0.8.1"
+    version: "0.8.4"
   serious_python_darwin:
     dependency: transitive
     description:
       path: "../../../serious_python_darwin"
       relative: true
     source: path
-    version: "0.8.1"
+    version: "0.8.4"
   serious_python_linux:
     dependency: transitive
     description:
       path: "../../../serious_python_linux"
       relative: true
     source: path
-    version: "0.8.1"
+    version: "0.8.4"
   serious_python_platform_interface:
     dependency: transitive
     description:
       path: "../../../serious_python_platform_interface"
       relative: true
     source: path
-    version: "0.8.1"
+    version: "0.8.4"
   serious_python_windows:
     dependency: transitive
     description:
       path: "../../../serious_python_windows"
       relative: true
     source: path
-    version: "0.8.1"
+    version: "0.8.4"
   shelf:
     dependency: transitive
     description:

src/serious_python/pubspec.yaml

@@ -2,7 +2,7 @@ name: serious_python
 description: A cross-platform plugin for adding embedded Python runtime to your Flutter apps.
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/serious-python
-version: 0.8.4
+version: 0.8.5
 
 platforms:
   ios:

src/serious_python_android/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.8.5
+
+* Added Java `loadLibrary` to Android plugin to support `pyjnius` ([#128](https://github.com/flet-dev/serious-python/issues/128)).
+
 ## 0.8.4
 
 * Copy `site-packages/flutter` contents to `SERIOUS_PYTHON_FLUTTER_PACKAGES`.

src/serious_python_android/android/build.gradle

@@ -1,5 +1,5 @@
 group 'com.flet.serious_python_android'
-version '0.8.4'
+version '0.8.5'
 
 def python_version = '3.12'
 

src/serious_python_android/android/src/main/java/com/flet/serious_python_android/AndroidPlugin.java

@@ -1,18 +1,26 @@
 package com.flet.serious_python_android;
-
+import java.lang.*;
 import android.content.Context;
 import android.content.ContextWrapper;
 import androidx.annotation.NonNull;
 import android.system.Os;
+import android.content.Intent;
+import android.app.Activity;
 
 import io.flutter.embedding.engine.plugins.FlutterPlugin;
+import io.flutter.embedding.engine.plugins.activity.ActivityAware;
+import io.flutter.embedding.engine.plugins.activity.ActivityPluginBinding;
 import io.flutter.plugin.common.MethodCall;
 import io.flutter.plugin.common.MethodChannel;
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler;
 import io.flutter.plugin.common.MethodChannel.Result;
 
 /** AndroidPlugin */
-public class AndroidPlugin implements FlutterPlugin, MethodCallHandler {
+public class AndroidPlugin implements FlutterPlugin, MethodCallHandler, ActivityAware {
+
+  public static final String MAIN_ACTIVITY_HOST_CLASS_NAME = "MAIN_ACTIVITY_HOST_CLASS_NAME";
+  public static Activity mActivity = null;
+
   /// The MethodChannel that will the communication between Flutter and native
   /// Android
   ///
@@ -30,6 +38,16 @@ public void onAttachedToEngine(@NonNull FlutterPluginBinding flutterPluginBindin
     this.context = flutterPluginBinding.getApplicationContext();
   }
 
+  @Override
+  public void onAttachedToActivity(@NonNull ActivityPluginBinding activityPluginBinding) {
+    mActivity = activityPluginBinding.getActivity();
+    try {
+      Os.setenv(MAIN_ACTIVITY_HOST_CLASS_NAME, this.getClass().getCanonicalName(), true);
+    } catch (Exception e) {
+      // nothing to do
+    }
+  }
+
   @Override
   public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
     if (call.method.equals("getPlatformVersion")) {
@@ -38,6 +56,13 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
       ContextWrapper contextWrapper = new ContextWrapper(context);
       String nativeLibraryDir = contextWrapper.getApplicationInfo().nativeLibraryDir;
       result.success(nativeLibraryDir);
+    } else if (call.method.equals("loadLibrary")) {
+      try {
+        System.loadLibrary(call.argument("libname"));
+        result.success(null);
+      } catch (Throwable e) {
+        result.error("Error", e.getMessage(), null);
+      }
     } else if (call.method.equals("setEnvironmentVariable")) {
       String name = call.argument("name");
       String value = call.argument("value");
@@ -56,4 +81,14 @@ public void onMethodCall(@NonNull MethodCall call, @NonNull Result result) {
   public void onDetachedFromEngine(@NonNull FlutterPluginBinding binding) {
     channel.setMethodCallHandler(null);
   }
+
+  @Override
+  public void onDetachedFromActivity() {}
+
+  @Override
+  public void onDetachedFromActivityForConfigChanges() {}
+
+  @Override
+  public void onReattachedToActivityForConfigChanges(ActivityPluginBinding binding) {}
+
 }