keep track of ideas

.bashrc

@@ -1 +0,0 @@
-

.gitignore

@@ -1,5 +1,13 @@
+*.apk
+*.apk.install-log
 apk/ToyKey.keystore
 apk/obj
 apk/obj/*
 apk/bin/*
+apk/result
+apk/result/
+apk/result/*
 apk/bin/!.gitkeep
+/example.app.apk
+docker-compose-build.log
+/Makefile.apps

Dockerfile

@@ -1,28 +1,42 @@
 FROM archlinux:latest
 
+ARG YESACCEPT=n
+RUN echo "this is $YESACCEPT"
 RUN pacman -Syu --noconfirm
-RUN pacman -S --noconfirm coreutils bash shadow make unzip jdk11-openjdk wget
+RUN pacman -S --noconfirm coreutils bash shadow make unzip zip jdk17-openjdk wget
 ENV ANDROID_SDK_ROOT="/opt/android"
 ENV BUILD_TOOLS_LATEST="$ANDROID_SDK_ROOT/cmdline-tools/latest"
 RUN BUILD_TOOLS="$(realpath -m "$BUILD_TOOLS_LATEST/..")";\
     mkdir -p "$BUILD_TOOLS";\
     cd "$BUILD_TOOLS";\
     pwd;\
-    wget -O cmdline-tools.zip https://dl.google.com/android/repository/commandlinetools-linux-9477386_latest.zip;\
+    for LATESTTOOLS in \
-    unzip cmdline-tools.zip;\
+      "$(curl https://developer.android.com/studio#command-line-tools-only | grep -e 'https://dl.google.com/android/repository/commandlinetools-linux-.*_latest.zip' | cut -f2 -d'"')" \
+      'https://dl.google.com/android/repository/commandlinetools-linux-11076708_latest.zip' ;\
+    do \
+      echo "testing to get '$LATESTTOOLS'";\
+      echo test "${LATESTTOOLS:0:22}" = "https://dl.google.com/" -a "${LATESTTOOLS:(-11)}" = "_latest.zip" ;\
+      test "${LATESTTOOLS:0:22}" = "https://dl.google.com/" -a "${LATESTTOOLS:(-11)}" = "_latest.zip" || { echo "unsure of URL $LATESTTOOLS correct, skipping it..." >&2; continue; }; \
+      wget -O cmdline-tools.zip "$LATESTTOOLS" ;\
+      unzip cmdline-tools.zip && break || { echo "error downloading working cmdline-tools.zip"; exit 1; };\
+    done;\
     ls ;\
     ls cmdline-tools;\
     rm cmdline-tools.zip;\
     mv -v cmdline-tools "$BUILD_TOOLS_LATEST" || true
 ENV PATH="$PATH:$BUILD_TOOLS_LATEST/bin"
-ENV JAVA_HOME="/usr/lib/jvm/java-11-openjdk/"
+#TODO make this automatic
-#ENTRYPOINT bash -c 'sleep 10000'
+ENV JAVA_HOME="/usr/lib/jvm/java-17-openjdk/"
 ENV LIBRARY_PATH="$LIBRARY_PATH:$BUILD_TOOLS_LATEST/lib"
-ARG YESACCEPT=n
+RUN test "$YESACCEPT" = "y" || { printf "\033[31;1;4m%s\n%s\033[0m " "FAILED TO BUILD CONTAINER: You did not ACCEPT THE UPSTREAM LICENSE" " -> export YESACCEPT=y" >&2; exit 1; }
-RUN echo you selected to accept the licenses/TOS 
+RUN echo you selected to accept the licenses/TOS
 RUN echo "$YESACCEPT" | sdkmanager --install "build-tools;33.0.2"
 RUN echo "$YESACCEPT" | sdkmanager --install "platforms;android-33"
-#RUN apk add setpriv
+RUN echo "$YESACCEPT" | sdkmanager --install "ndk;28.0.12433566"
+#RUN echo "$YESACCEPT" | sdkmanager --install "system-images;android-33;aosp_atd;x86_64"
+#RUN echo "$YESACCEPT" | sdkmanager --install "emulator"
+#RUN echo "no" |  avdmanager --verbose create avd  --force --name "thedevice" --package 'system-images;android-33;aosp_atd;x86_64' --tag "aosp_atd" --abi "x86_64"
+#RUN echo "$YESACCEPT" | sdkmanager --install "platform-tools"
 COPY entrypoint.sh /entrypoint.sh
 RUN chown 0:0 /entrypoint.sh
 RUN chmod 0700 /entrypoint.sh

Dockerfile.alpine

@@ -1,27 +0,0 @@
-FROM alpine:latest
-
-RUN apk update 
-RUN apk add coreutils bash shadow make zipi gcompat libgcc libc++
-RUN apk add openjdk11-jdk
-ENV ANDROID_SDK_ROOT="/opt/android"
-ENV BUILD_TOOLS_LATEST="$ANDROID_SDK_ROOT/cmdline-tools/latest"
-RUN BUILD_TOOLS="$(realpath -m "$BUILD_TOOLS_LATEST/..")";\
-    mkdir -p "$BUILD_TOOLS";\
-    cd "$BUILD_TOOLS";\
-    pwd;\
-    wget -O cmdline-tools.zip https://dl.google.com/android/repository/commandlinetools-linux-9477386_latest.zip;\
-    unzip cmdline-tools.zip;\
-    ls ;\
-    ls cmdline-tools;\
-    rm cmdline-tools.zip;\
-    mv -v cmdline-tools "$BUILD_TOOLS_LATEST" || true
-ENV PATH="$PATH:$BUILD_TOOLS_LATEST/bin"
-ENV LIBRARY_PATH="$LIBRARY_PATH:$BUILD_TOOLS_LATEST/lib"
-
-RUN yes | sdkmanager --install "build-tools;33.0.2"
-RUN yes | sdkmanager --install "platforms;android-33"
-RUN apk add setpriv
-COPY entrypoint.sh /entrypoint.sh
-RUN chown 0:0 /entrypoint.sh
-RUN chmod 0700 /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]

IDEAS.TODOS.md

@@ -0,0 +1,43 @@
+# Ideas and todos
+
+## 1. EMULATOR: enable a way to have the "sdk emulator" running 
+
+this is attempted in the `emulator` branch. Challenges comprise:
+
+* Xorg server must be forwarded (and other stuff like sound etc)
+* the emulator itself might need to have `docker .... --device` setup for `/dev/kvm` probably (and at that point it might be
+  better to have it all run natively inside a VM anyways... (alternative would be nested virutalization) 
+
+
+## 2. BUILD and PACKAGENAME improvements
+
+### status quo: 2 Makefiles (gnu make) are involved, 
+* a) one being the outer one that uses Makefile.apps as an include and then
+* b) an inner one located at `./apps/<app-name>/Makefile`
+
+the inner-one is not "parametrized" and at present has explicit nameing of the android app/ package (i.e. `example.app`), 
+which comes with the additional negative that one has several files that need to be adjusted, this also being true 
+because of the "fun that JAVA" naming conventions which basically means that the very least those files all have to
+be kept in sync
+
+* `./apps/<app-name>/AndroidManifest.xml` 
+* `./apps/<app-name>/Makefile` 
+* `./apps/<app-name>/src/<package-name>/<activity-name>.java`
+
+### goal: attempt to have the `<app-name>`, `<package-name>` and `<package-name>` be abstracted
+
+Ideally make the inner Makefile superfluous
+
+
+## 3. ALLOW KOTLIN
+
+Since Java was apparently not "good/fancy" enough of maybe "bloated" the hippster did do what they like best
+re-invent to garnish personal "pride/achievement" and thus make a unhelpful thing (java) into now 2 unhelpful
+things (i.e. Kotlin and Java) super! 
+However oftentimes now the undesired-yet-existing-kotlin is there and a goal could be to enable it being used.
+After all it appears to be a tiny bit less of a boilerplate annoyance...
+
+## 4. ALLOW GRADLEBUILDS
+
+GRADLE is often used as a building system for apps, it would be beneficial to have those build run also 
+in this `android-docker-app` thing

Makefile

@@ -1,24 +1,18 @@
 
+# this includes explicit rules
+include Makefile.apps
+Makefile.apps: Makefile apps
+	@./Makefile.make.Makefile.apps.sh
 
-all: build install
+apps:
+	mkdir "$@"
 
-build:
+install: $(shell for APP in apps/*/; do test -d "$$APP" || continue; echo "$$APP""app.apk.install-log"; done)
-	docker-compose run compile 
+force-install reinstall: 
+	for APP in apps/*/; do rm -f "$$APP""app.apk.install-log" 2>/dev/null; done; $(MAKE) install
+run: $(shell cd apps/; for APP in */; do test -d "$$APP" || continue; echo "run-$${APP%/}"; done)
 
-install: 
+docker-compose-build.log: Dockerfile compose.yml
-	adb install -r ./apk/bin/app1.apk
-
-clean: 
-	rm docker-compose-build.log || true
 	docker-compose down --remove-orphans --rmi all
-
+	BUILDKIT_PROGRESS=plain docker-compose build | tee docker-compose-build.log 
-apk: apk/app.apk
-	true
-
-apk/app.apk: docker-compose-build.log 
-	docker-compose run compile 
-
-docker-compose-build.log: Dockerfile docker-compose.yml
-	docker-compose down --remove-orphans --rmi all
-	BUILDKIT_PROGRESS=plain docker-compose build --no-cache | tee docker-compose-build.log 
 

Makefile.make.Makefile.apps.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+(
+set -xe
+cd apps
+for APP in */
+do 
+  test -d "$APP" || continue;
+  APP="${APP%/}";
+  cat << MAKEFILE
+apps/$APP/app.apk: docker-compose-build.log
+	docker compose run --rm compile $APP
+build-$APP: apps/$APP/app.apk
+	true
+apps/$APP/app.apk.install-log: apps/$APP/app.apk
+	adb install -r $< > \$@ || rm \$@
+install-$APP: apps/$APP/app.apk.install-log
+	true
+run-$APP: apps/$APP/app.apk.install-log
+	adb shell am start -n app.example/.ExampleApp
+MAKEFILE
+done 
+) > Makefile.apps

README.md

@@ -1,8 +1,42 @@
 # Repo allowing -in a KISS way- to create a containered way to build an Android App APK
 
+## brach `no-res.xml`
+
+this branch features the exmaple.app to not require the compoletely bogus unneeded requirement
+to setup a `./apk/res/layouts/res.xml` file to setup the layout to be used. 
+Instead a layout is created inline
+
+
 ## tl;dr
 
-to build an application
+to `make` minimal exmaple.app via the docker-compose:
+```
+# clone repo
+git clone https://git.alexmahr.de/lion/android-app-docker
+# enter local copy
+cd android-app-docker
+# checkout the branch for minmal-example-app
+git checkout minimal-example-app
+# set env variable
+export YESACCEPT=y #to acceccpt the license agreement terms (it is your responsibility to read it)
+# build app (this involves first building the docker compose setup and container used to build the apk)
+make build
+```
+
+This will generate the APK file `./apk/example.app.apk`
+
+this can be installed via `adb`
+```
+adb install -r ./apk/example.app.apk 
+# or alternative type
+make install
+```
+which of course would require your mobile device to be connected and setup for USB-debugging.
+
+
+## a bit longer
+
+build an application
 
 0. build the image _*_ 
 ```sh

apk/AndroidManifest.xml

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-      package="de.alexmahr.app1"
-      android:versionCode="1"
-      android:versionName="1.0">
-    <uses-sdk android:minSdkVersion="30"
-    android:targetSdkVersion="33"/>
-    <uses-permission android:name="android.permission.INTERNET">
-    </uses-permission>
-   <!-- android:maxSdkVersion="integer" /> -->
-    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
-        <activity android:name="de.alexmahr.app1.App1"
-                  android:exported="true"
-                  android:label="@string/app_name">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN" />
-                <category android:name="android.intent.category.LAUNCHER" />
-            </intent-filter>
-        </activity>
-    </application>
-</manifest>

apk/Makefile

@@ -1,58 +0,0 @@
-#JAVA_HONE = /usr/lib/jvm/java-8-openjdk
-ANDROID_HOME = /opt/android
-ANDROID_VERSION = 33.0.2
-PLATFORM = android-$(shell echo $(ANDROID_VERSION) | sed 's/\..*//')
-TOOLCHAIN = /Users/amon/grive/development/Android/NativeToolchain
-GCC = $(TOOLCHAIN)/bin/aarch64-linux-android-gcc
-CXX_FLAGS = -march=armv8-a --sysroot=$(TOOLCHAIN)/sysroot
-
-
-
-all: build 
-
-.PHONY : build
-.PHONY : deploy
-.PHONY : clean
-
-build : ./bin/app1.apk
-
-
-./bin/app1.apk : ./bin/signed.apk
-	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/zipalign -v -f 4 $< $@
-	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/apksigner sign --ks ToyKey.keystore --key-pass pass:armena --ks-pass pass:armena  $@
-	
-./bin/signed.apk : ./bin/unsigned.apk ./ToyKey.keystore
-	#$(JAVA_HOME)/bin/jarsigner -verbose -keystore ./ToyKey.keystore -storepass armena -keypass armena -signedjar $@ $< helljniKey
-	jarsigner -verbose -keystore ./ToyKey.keystore -storepass armena -keypass armena -signedjar $@ $< helljniKey
-		
-./bin/unsigned.apk : ./bin/classes.dex 
-	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/aapt package -v -u -f -M ./AndroidManifest.xml -S ./res \
-	-I $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar -F $@ ./bin
-#	$(ANDROID_HOME)/build-tools/23.0.3/aapt add $@ lib/arm64-v8a/libhello.so
-		
-./bin/classes.dex : ./obj/de/alexmahr/app1/App1.class
-	#$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/d8 --dex --verbose --output=$@ ./obj
-	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/d8 $(shell find obj -name '*.class') --lib $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar --output bin
-	
-#./lib/arm64-v8a/libhello.so : ./jni/hello.o
-#	$(GCC) -shared $< -o $@
-	
-#./jni/%.o : ./jni/%.c
-#	$(GCC) $(CXX_FLAGS) -fPIC -c $< -o $@
-		
-./src/de/alexmahr/app1/R.java : $(shell find ./res -type f)
-	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/aapt package -v -f -m  -S ./res -J ./src -M ./AndroidManifest.xml \
-	-I $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar
-
-./obj/de/alexmahr/app1/App1.class : ./src/de/alexmahr/app1/App1.java  ./src/de/alexmahr/app1/R.java
-	#$(JAVA_HOME)/bin/javac -source 7 -target 7 -d ./obj -classpath $(ANDROID_HOME)/platforms/$(PLATFORMgg)/android.jar -sourcepath ./src $<
-	#javac -source 7 -target 7 -d ./obj -classpath $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar -sourcepath ./src $<
-	javac -d ./obj -classpath $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar -sourcepath ./src $<
-	
-./ToyKey.keystore : 
-	#$(JAVA_HOME)/bin/keytool -genkeypair -validity 1000 -dname "CN=some company,O=Android,C=JPN" -keystore $@ 
-	keytool -genkeypair -validity 1000 -dname "CN=alexander,O=Android,C=JPN" -keystore $@ \
-	-storepass armena -keypass armena -alias helljniKey -keyalg RSA -v
-	
-clean:
-	rm -f ./bin/* ./lib/arm64-v8a/* 

apk/res/layout/main.xml

@@ -1,13 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
-    android:orientation="vertical"
-    android:layout_width="fill_parent"
-    android:layout_height="fill_parent"
-    >
-<TextView
-    android:layout_width="fill_parent"
-    android:layout_height="wrap_content"
-    android:text="aa"
-    />
-</LinearLayout>
-

apk/src/de/alexmahr/app1/App1.java

@@ -1,37 +0,0 @@
-package de.alexmahr.app1;
-
-import android.util.Log;
-import android.widget.TextView;
-import android.app.Activity;
-import android.os.Bundle;
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStreamReader;
-import java.io.OutputStream;
-import java.util.concurrent.TimeUnit;
-import android.text.method.ScrollingMovementMethod;
-
-
-
-public class App1 extends Activity
-{
-    @Override
-    public void onCreate(Bundle savedInstanceState) 
-    {
-        try
-        {
-            super.onCreate(savedInstanceState);
-            //volatile String result = "initial";
-            String result = "initial";
-            TextView  tv = new TextView(this);
-            tv.setMovementMethod(new ScrollingMovementMethod());
-            tv.setText( result);
-            setContentView(tv);
-        } catch (Exception e) {
-            throw new RuntimeException(e);
-        }
-
-    }
-	
-	
-}

apk/src/de/alexmahr/app1/R.java

@@ -1,22 +0,0 @@
-/* AUTO-GENERATED FILE.  DO NOT MODIFY.
- *
- * This class was automatically generated by the
- * aapt tool from the resource data it found.  It
- * should not be modified by hand.
- */
-
-package de.alexmahr.app1;
-
-public final class R {
-    public static final class attr {
-    }
-    public static final class drawable {
-        public static final int ic_launcher=0x7f020000;
-    }
-    public static final class layout {
-        public static final int main=0x7f030000;
-    }
-    public static final class string {
-        public static final int app_name=0x7f040000;
-    }
-}

apps/webview/.gitignore

@@ -0,0 +1,9 @@
+/ToyKey.keystore
+/obj
+/obj/*
+/bin/*
+!/bin/.gitkeep
+/result
+/result/
+/result/*
+/example.app.apk

apps/webview/AndroidManifest.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+      package="app.example"
+      android:versionCode="1"
+      android:versionName="1.0">
+    <uses-sdk android:minSdkVersion="30"
+    android:targetSdkVersion="33"/>
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.MANAGE_DOCUMENTS"/>
+    <uses-permission android:name="android.permission.MANAGE_MEDIA"/>
+    <uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
+    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO"/>
+    <uses-permission android:name="android.permission.READ_MEDIA_IMAGES"/>
+    <uses-permission android:name="android.permission.READ_MEDIA_VIDEO"/>
+    <uses-permission android:name="android.permission.READ_MEDIA_VISUAL_USER_SELECTED"/>
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"  android:maxSdkVersion="32" />
+    <uses-permission android:name="android.permission.READ_SYNC_SETTINGS"/>
+    <uses-permission android:name="android.permission.VIBRATE"/>
+    <uses-permission android:name="android.permission.WAKE_LOCK"/>
+    <uses-permission android:name="android.permission.WRITE_CALENDAR"/>
+    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
+    <uses-permission android:name="android.permission.WRITE_MEDIA_STORAGE"/>
+    <uses-permission android:name="android.permission.WRITE_SETTINGS"/>
+    <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS"/>
+    <application android:label="@string/app_name" android:icon="@drawable/ic_launcher">
+        <activity android:name="app.example.ExampleApp"
+                  android:exported="true"
+                  android:configChanges="orientation|screenSize|keyboardHidden"
+                  android:label="@string/app_name">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

apps/webview/Makefile

@@ -0,0 +1,53 @@
+#JAVA_HONE = /usr/lib/jvm/java-8-openjdk
+ANDROID_HOME = /opt/android
+ANDROID_VERSION = 33.0.2
+PLATFORM = android-$(shell echo $(ANDROID_VERSION) | sed 's/\..*//')
+TOOLCHAIN = /Users/amon/grive/development/Android/NativeToolchain
+GCC = $(TOOLCHAIN)/bin/aarch64-linux-android-gcc
+CXX_FLAGS = -march=armv8-a --sysroot=$(TOOLCHAIN)/sysroot
+
+
+
+all: build 
+
+.PHONY : build
+.PHONY : deploy
+.PHONY : clean
+
+build : ./result/example.app.apk
+	mv ./result/example.app.apk app.apk
+	true 
+	
+env:
+	set > set ; env > env
+./result/example.app.apk : ./result/signed.apk
+	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/zipalign -v -f 4 $< $@
+	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/apksigner sign --ks ToyKey.keystore --key-pass pass:armena --ks-pass pass:armena  $@
+	
+./result/signed.apk : ./result/unsigned.apk ./ToyKey.keystore ./result
+	jarsigner -verbose -keystore ./ToyKey.keystore -storepass armena -keypass armena -signedjar $@ $< helljniKey
+		
+./result:
+	mkdir -p "$@"
+
+./result/unsigned.apk : ./bin/classes.dex  ./result
+	rm -rvf "$@"
+	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/aapt package -v -u -f -M ./AndroidManifest.xml -S ./res \
+	-I $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar -A ./assets -F $@ ./bin
+		
+./bin/classes.dex : ./obj/app/example/ExampleApp.class ./obj/app/example/ExampleApp$$1.class 
+	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/d8 ./obj/app/example/*.class  --lib $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar --output bin
+	
+./src/app/example/R.java : $(shell find ./res -type f)
+	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/aapt package -v -f -m  -S ./res -J ./src -M ./AndroidManifest.xml \
+	-I $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar
+
+./obj/app/example/ExampleApp.class : ./src/app/example/ExampleApp.java  ./src/app/example/R.java 
+	javac -d ./obj -classpath $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar -sourcepath ./src $<
+	
+./ToyKey.keystore : 
+	keytool -genkeypair -validity 1000 -dname "CN=alexander,O=Android,C=JPN" -keystore $@ \
+	-storepass armena -keypass armena -alias helljniKey -keyalg RSA -v
+	
+clean:
+	rm -f ./bin/* ./lib/arm64-v8a/* ./result/*

apps/webview/assets/index.html

@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <meta charset="UTF-8">
+        <meta content="width=device-width,initial-scale=1.0" name="viewport">
+    </head>
+<script> 
+
+function sleepit(ms) {
+  return new Promise((resolve) => {
+    setTimeout(() => {
+      resolve(1);
+    }, ms);
+  });
+}
+function divMessage(html){
+    var div = document.createElement('div');
+    div.innerHTML=html;
+    document.body.appendChild(div);
+    div.scrollIntoView({ behavior: 'smooth'});
+}
+
+(async function webviewprogram(){
+    var port;
+    var resolves = [];
+    function setupMessage(){
+        return new Promise((resolve) => {
+            window.addEventListener('message',(e)=>{
+                if(e.data=="init-from-java" && ! port){
+                    divMessage('INIT');
+                    port = e.ports[0];
+                    port.onmessage = function (ee) {
+                        divMessage('AAport.onmessage='+ee.data);
+                        var response = JSON.parse(ee.data);
+                        divMessage('response.resolveIndex'+response.resolveIndex);//AAport.onmessage='+ee.data);
+                        var localresolve = resolves[response.resolveIndex];
+                        divMessage(typeof localresolve)
+
+                        localresolve(response);
+                    }
+                    resolve()
+                }
+                divMessage('message='+e.data);
+            },true);
+        });
+    }
+    function doLs(path){
+        divMessage('doLs');
+        return new Promise((resolve) => {
+            divMessage('resolves.length'+resolves.length);
+            resolves.push(resolve);
+            divMessage('after push resolves.length'+resolves.length);
+            port.postMessage('{"function":"ls","path":"'+path+'","resolveIndex":"'+(resolves.length-1)+'"}');
+        });
+    }
+    function doCat(file){
+        return new Promise((resolve) => {
+            resolves.push(resolve);
+            port.postMessage('{"function":"cat","resolveIndex":"'+resolves.length+'"}');
+        });
+    }
+    window.addEventListener('load',()=>{
+        divMessage('JAVASCRIPT WORKS');
+    },false);
+//    await sleepit(2000);
+//    divMessage('awaited 2000');
+//    await sleepit(2000);
+//    divMessage('awaited again 2000');
+    await setupMessage();
+    divMessage('setup');
+    async function mapDoLs(path){
+        var reply = await doLs(path);
+        divMessage("reply.result.length"+reply.result.length);
+        reply.result.forEach((file)=>{
+            divMessage(file.name);//reply.result.length"+reply.result.length);
+            //var button
+            button = document.createElement("button");
+            button.addEventListener("click",()=>{ 
+                    if(file.isDirectory)
+                    mapDoLs(path+"/"+file.name);
+            },false);
+            //if(file.isDirectory){
+            //{
+            //    button = document.createElement("button");
+            //    button.addEventListener("click",()=>{ 
+            //            mapDoLs(path+"/"+file.name);
+            //    },false);
+            //} else {
+            //    button = document.createElement("div");
+            //}
+            ////a.href="#";
+            //////a.textContent="asdasdada"
+            button.textContent=file.name+ " " + file.size;
+            document.body.appendChild(button);
+        });
+    }
+    await mapDoLs("/DCIM");
+    divMessage("done");
+//    for(let file of DCIM.result){
+//        divMessage("filename");
+
+    //});
+})();
+</script>
+<a href='https://html5test.co/'>https://html5test.co/</a>
+<h1> this is html <h1> 
+<h2> this is a h2</h2>
+<input type=text />
+<img src='https://wald.alexmahr.de/images/bear.avif'>
+<img src='https://wald.alexmahr.de/images/delphin.avif'>
+</html>

apps/webview/res/values/strings.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="app_name">App1</string>
+    <string name="app_name">Example App</string>
 </resources>

apps/webview/src/app/example/.gitignore

@@ -0,0 +1 @@
+R.java

apps/webview/src/app/example/ExampleApp.java

@@ -0,0 +1,179 @@
+package app.example;
+import android.provider.Settings ;
+import android.content.Intent;
+import android.util.Log;
+import android.util.Base64;
+import java.util.Objects;
+import android.app.Activity;
+import android.os.Bundle;
+import android.os.CountDownTimer;
+import android.os.Environment;
+import android.text.method.ScrollingMovementMethod;
+import android.view.*;
+//import android.view.MenuItem;
+import android.view.ViewGroup.*;
+import android.widget.*;
+//import android.widget.Toast;
+//import android.widget.TextView;
+import android.webkit.*;
+import android.net.Uri;
+import org.json.JSONObject;
+//import android.webkit.WebView;
+//import android.webkit.WebMessage;
+//import android.webkit.WebMessagePort;
+import java.io.InputStream;
+import java.io.File;
+
+public class ExampleApp extends Activity {
+
+    public JSONObject doLs(JSONObject message){
+        try{
+        JSONObject file;
+        File directory = new File(Environment.getExternalStorageDirectory().toString() + message.getString("path"));
+        File[] files = directory.listFiles();
+        for (int i = 0; i < files.length; i++)
+        {
+            try{
+                //Log.d("ALEXINFO","filename"+files[i].getName());
+                file = new JSONObject();
+                file.put("name",files[i].getName());
+                file.put("isFile",files[i].isFile());
+                file.put("isDirectory",files[i].isDirectory());
+                file.put("size",files[i].length());
+                message.accumulate("result",file);
+            } catch (Exception e) {
+               Log.d("Exception EX1","ex1");
+            }
+        }
+        } catch (Exception e) {
+               Log.d("Exception EX2","ex2");
+        }
+        return message;
+    }
+
+    public JSONObject doCat(JSONObject message){
+        try{
+        File directory = new File(Environment.getExternalStorageDirectory().toString() + message.getString("path"));
+        File[] files = directory.listFiles();
+        for (int i = 0; i < files.length; i++)
+        {
+            try{
+                message.accumulate("result",files[i].getName());
+            } catch (Exception e) {}
+        }
+        } catch (Exception e) {}
+        return message;
+    }
+
+    final static int APP_STORAGE_ACCESS_REQUEST_CODE = 501; // Any value
+    private static final String BASE_URI = "https://alexmahr.de";
+    private WebMessagePort port;
+    private void initPort(WebView myWebView) {
+        final WebMessagePort[] channel=myWebView.createWebMessageChannel();
+        port=channel[0];
+        port.setWebMessageCallback(new WebMessagePort.WebMessageCallback() {
+            @Override
+            public void onMessage(WebMessagePort porte, WebMessage message) {
+                try{
+                    JSONObject messageJSON = new JSONObject(message.getData());
+                    JSONObject reply;
+                    if(Objects.equals(messageJSON.getString("function"),"ls"))
+                    {
+                        reply = doLs(messageJSON);
+                        reply.put("super","man");
+                        port.postMessage(new WebMessage(reply.toString()));
+                        return;
+                    }
+                    else if(Objects.equals(messageJSON.getString("function"),"cat"))
+                    {
+                        reply = doCat(messageJSON);
+                        reply.put("super","cat");
+                        port.postMessage(new WebMessage(reply.toString()));
+                        return;
+                    }
+                    else {
+                        reply=messageJSON;
+                        reply.put("super","else");
+                        reply.accumulate("result",1);
+                        reply.accumulate("result","something");
+                        port.postMessage(new WebMessage(reply.toString()));
+                    }
+                } catch( Exception e) { }
+            }
+        });
+        myWebView.postWebMessage(new WebMessage("init-from-java", new WebMessagePort[]{channel[1]}),Uri.parse(BASE_URI));
+    }
+
+    public String readFileFromAssets(String filename) {
+        String filecontents = "";
+        try {
+            InputStream stream = getAssets().open(filename);
+            int filesize = stream.available();
+            byte[] filebuffer = new byte[filesize];
+            stream.read(filebuffer);
+            stream.close();
+            filecontents = new String(filebuffer);
+        } catch (Exception e) {
+            // I <3 java exceptions
+        }
+        return filecontents;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        // this removes the title bar (a ~1cm big strip at the top of the app showing its name
+        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
+        // we create the webview (at least on the android 14 that is a webview that features avif + websockets etc....)
+        WebView myWebView = new WebView(this);//activityContext);
+//        MyJavascriptInterface myJavaScriptInterface = new MyJavascriptInterface(this,myWebView);
+        // we create a webview (there is also setwebviewclient-vs-setwebchromeclient
+        WebViewClient myWebViewClient= new WebViewClient(); 
+        myWebView.setWebViewClient(myWebViewClient);
+        // to setup settings
+        WebSettings myWebSettings = myWebView.getSettings();
+        myWebSettings.setBuiltInZoomControls(true);
+        myWebSettings.setDisplayZoomControls(false);
+        myWebSettings.setJavaScriptEnabled(true);
+        myWebView.addJavascriptInterface(this, "myJavaScriptInterface");
+        // load the html from assets file 
+        String html = readFileFromAssets("index.html");
+        myWebView.loadDataWithBaseURL(BASE_URI,html, "text/html", "UTF-8",null);
+        //myWebView.loadData(encodedHtml, "text/html", "base64");
+        // alternatively this could be to load a website
+        //myWebView.loadUrl("https://alexmahr.de/ru");
+        setContentView(myWebView);
+        new CountDownTimer(500, 100) {
+            public void onTick(long millisUntilFinished) {
+                try{
+                    JSONObject MyJSONObject = new JSONObject("{\"json\":[1,2,3],\"something\":\"test\"}");
+                    myWebView.postWebMessage(new WebMessage("this is the message"+millisUntilFinished+ " " + MyJSONObject.get("something")),Uri.parse(BASE_URI));
+                } catch( Exception e) { }
+//                 mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
+//                 myWebView.evaluateJavascript("document.body.innerHTML='SUP "+millisUntilFinished+" all is lost';",null);
+            }
+
+            public void onFinish() {
+                initPort(myWebView);//myWebView.evaluateJavascript("document.body.innerHTML='all is lost';",null);
+            }
+        }.start();
+//        Intent intent = new Intent(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION, Uri.parse("package: app.example"));// + BuildConfig.APPLICATION_ID));
+        if(!Environment.isExternalStorageManager()){
+            Intent intent = new Intent();
+            intent.setAction(Settings.ACTION_MANAGE_APP_ALL_FILES_ACCESS_PERMISSION);
+            Uri uri = Uri.fromParts("package", this.getPackageName(), null);
+            intent.setData(uri);
+            startActivity(intent);
+        } else {
+            Toast.makeText(this, "berechtigt", Toast.LENGTH_SHORT).show();
+        }
+        //intent.setAction(Settings.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION);
+//        startActivityForResult(intent, APP_STORAGE_ACCESS_REQUEST_CODE);
+    }
+    @JavascriptInterface
+    public String toString() {
+//        this.webview.evaluateJavascript("(setTimeout(()=>{document.body.innerHTML='all gone';},2000)()",null);
+        return "this is good"; 
+    }
+}
+

compose.yml

@@ -1,9 +1,16 @@
 services:
   compile:
+    hostname: thinkbox
     build:
       context: .
       args:
-        YESACCEPT: ${YESACCEPT}
+        YESACCEPT: ${YESACCEPT:-}
     stop_grace_period: 1s  
+    environment:
+      XAUTHORITY: /root/.Xauthority
+      DISPLAY: ":0"
     volumes:
-      - ./apk:/apk
+      - ./apps:/apps
+      - /home/alex/.Xauthority:/root/.Xauthority:ro
+     
+

entrypoint.sh

@@ -1,8 +1,18 @@
 #!/bin/sh
 
-cd /apk;
+set -x
-VOLUID="$(stat -c "%u" /apk)"; 
+
-VOLGID="$(stat -c "%g" /apk)"; 
+
-CMD="${*:-"make"}"
+APKDIR="/apps/$1"
-setpriv --reuid $VOLUID --regid $VOLGID --clear-groups sh -c "$CMD"
+shift
+#test -d "$1" == 
+#APKDIR=
+#cd /apk/$1;
+#shift
+VOLUID="$(stat -c "%u" "$APKDIR")"; 
+VOLGID="$(stat -c "%g" "$APKDIR")"; 
+#CMD="${*:-"make"}"
+cd "$APKDIR"
+test -z "$*" && set -- make
+setpriv --reuid $VOLUID --regid $VOLGID --clear-groups sh -c "$*"