switch to load html from file (form assets)

.gitignore

@@ -2,4 +2,8 @@ apk/ToyKey.keystore
 apk/obj
 apk/obj/*
 apk/bin/*
+apk/result
+apk/result/
+apk/result/*
 apk/bin/!.gitkeep
+/example.app.apk

Dockerfile

@@ -19,6 +19,7 @@ ENV JAVA_HOME="/usr/lib/jvm/java-11-openjdk/"
 #ENTRYPOINT bash -c 'sleep 10000'
 ENV LIBRARY_PATH="$LIBRARY_PATH:$BUILD_TOOLS_LATEST/lib"
 ARG YESACCEPT=n
+RUN test "$YESACCEPT" = "y" || { printf "\033[31;1;4m%s\n%s\033[0m " "FAILED TO BUILD CONTAINER: You did not ACCEPT THE UPSTREAM LICENSE" " -> export YESACCEPT=y" >&2; exit 1; }
 RUN echo you selected to accept the licenses/TOS 
 RUN echo "$YESACCEPT" | sdkmanager --install "build-tools;33.0.2"
 RUN echo "$YESACCEPT" | sdkmanager --install "platforms;android-33"

Makefile

@@ -3,33 +3,25 @@
 all: build install
 
 build:
-	docker-compose run compile 
+	docker-compose run --rm compile 
+	ln -sf apk/result/example.app.apk ./; test -e ./example.app.apk || rm ./example.app.apk 
 
 install: 
-	adb install -r ./apk/example.app.apk
+	adb install -r ./example.app.apk
 
 .PHONY: clean-all
 clean-all: clean-docker clean-apk 
 
-
 .PHONY: clean-docker
 clean-docker: 
 	rm docker-compose-build.log || true
 	docker-compose down --remove-orphans --rmi all
 
-
 .PHONY: clean-apk
 clean-apk: 
 	cd apk && $(MAKE) clean
 
 
-
-apk: apk/app.apk
-	true
-
-apk/app.apk: docker-compose-build.log 
-	docker-compose run --rm compile 
-
 docker-compose-build.log: Dockerfile docker-compose.yml
 	docker-compose down --remove-orphans --rmi all
 	BUILDKIT_PROGRESS=plain docker-compose build | tee docker-compose-build.log 

README.md

@@ -1,5 +1,10 @@
 # Repo allowing -in a KISS way- to create a containered way to build an Android App APK
 
+
+## changelog
+
+* using https://android.googlesource.com/platform/cts/+/android-7.1.1_r13/tests/tests/webkit/src/android/webkit/cts/PostMessageTest.java derived 
+webmessage to send data to Javascript/Webview from Java (using a timer)
 ## brach `no-res.xml`
 
 this branch features the exmaple.app to not require the compoletely bogus unneeded requirement
@@ -27,7 +32,7 @@ This will generate the APK file `./apk/example.app.apk`
 
 this can be installed via `adb`
 ```
-adb install -r ./apk/example.app.apk 
+adb install -r ./example.app.apk 
 # or alternative type
 make install
 ```

apk/AndroidManifest.xml

@@ -5,9 +5,24 @@
       android:versionName="1.0">
     <uses-sdk android:minSdkVersion="30"
     android:targetSdkVersion="33"/>
-    <uses-permission android:name="android.permission.INTERNET">
-    </uses-permission>
-   <!-- android:maxSdkVersion="integer" /> -->
+    <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.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"

apk/Makefile

@@ -14,29 +14,34 @@ all: build
 .PHONY : deploy
 .PHONY : clean
 
-build : ./bin/example.app.apk
-	ln -sf ./bin/example.app.apk ./example.app.apk
+build : ./result/example.app.apk
+	true 
 	
-./bin/example.app.apk : ./bin/signed.apk
+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  $@
 	
-./bin/signed.apk : ./bin/unsigned.apk ./ToyKey.keystore
+./result/signed.apk : ./result/unsigned.apk ./ToyKey.keystore ./result
 	jarsigner -verbose -keystore ./ToyKey.keystore -storepass armena -keypass armena -signedjar $@ $< helljniKey
 		
-./bin/unsigned.apk : ./bin/classes.dex 
+./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 -F $@ ./bin
+	-I $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar -A ./assets -F $@ ./bin
 		
-./bin/classes.dex : ./obj/app/example/ExampleApp.class
-	$(ANDROID_HOME)/build-tools/$(ANDROID_VERSION)/d8 $(shell find obj -name '*.class') --lib $(ANDROID_HOME)/platforms/$(PLATFORM)/android.jar --output 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
+./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 : 
@@ -44,4 +49,4 @@ build : ./bin/example.app.apk
 	-storepass armena -keypass armena -alias helljniKey -keyalg RSA -v
 	
 clean:
-	rm -f ./bin/* ./lib/arm64-v8a/* 
+	rm -f ./bin/* ./lib/arm64-v8a/* ./result/*

apk/assets/index.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<script> 
+window.addEventListener('message',(e)=>{
+   var div = document.createElement('div');
+   div.innerHTML='message'+e.data;
+   document.body.appendChild(div);
+   div.scrollIntoView({ behavior: 'smooth'});
+},true);
+window.addEventListener('load',()=>{
+   var div = document.createElement('div');
+   div.innerHTML='JAVASCRIPT works'
+   document.body.appendChild(div);
+   div.scrollIntoView({ behavior: 'smooth'});
+},false);
+</script>
+<a href='https://html5test.co/'>https://html5test.co/</a>
+<h1> this is html <h1> 
+<h2> this is a h2</h2>
+<img src='https://wald.alexmahr.de/images/bear.avif'>
+</html>

apk/src/app/example/ExampleApp.java

@@ -1,33 +1,97 @@
 package app.example;
 
 import android.util.Log;
-import android.widget.TextView;
+import android.util.Base64;
 import android.app.Activity;
 import android.os.Bundle;
+import android.os.CountDownTimer;
 import android.text.method.ScrollingMovementMethod;
-import android.view.MenuItem;
 import android.view.*;
-import android.widget.*;
+//import android.view.MenuItem;
 import android.view.ViewGroup.*;
+import android.widget.*;
+//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;
 
 public class ExampleApp extends Activity {
+
+    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 port, WebMessage message) {
+            }
+        });
+        myWebView.postWebMessage(new WebMessage("", 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);
-        // creating LinearLayout
-        LinearLayout linLayout = new LinearLayout(this);
-        // specifying vertical orientation
-        linLayout.setOrientation(LinearLayout.VERTICAL);
-        // creating LayoutParams
-        LayoutParams linLayoutParam = new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
-        // set LinearLayout as a root element of the screen
-        setContentView(linLayout, linLayoutParam);
+        // 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(5000, 1000) {
+            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);
+            }
 
-        LayoutParams lpView = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
-
-        TextView tv = new TextView(this);
-        tv.setText("SUPERVIEalexW");
-        tv.setLayoutParams(lpView);
-        linLayout.addView(tv);
+            public void onFinish() {
+                myWebView.evaluateJavascript("document.body.innerHTML='all is lost';",null);
+            }
+        }.start();
+    }
+    @JavascriptInterface
+    public String toString() {
+//        this.webview.evaluateJavascript("(setTimeout(()=>{document.body.innerHTML='all gone';},2000)()",null);
+        return "this is good"; 
     }
 }
+

compose.yml

@@ -3,7 +3,7 @@ services:
     build:
       context: .
       args:
-        YESACCEPT: ${YESACCEPT}
+        YESACCEPT: ${YESACCEPT:-n}
     stop_grace_period: 1s  
     volumes:
       - ./apk:/apk