✨ [Free] NoFileHtml - view html without files

Extensions
23

It works on Android 11!!! :blush: Thank You!!!

1 Like
24

not working can you please check

player.html.txt (9.0 KB)

25

Remove all your comments, e.g. // play, from your javascript, then try again.

See

✨ [Free] NoFileHtml - view html without files - #16 by TIMAI2

(I have now updated the first post with this information)

2 Likes
27

can i have its code

28

Sure:

package uk.co.metricrat.nofilehtml;

import android.util.*;
import android.webkit.*;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.runtime.*;
import java.io.*;
import java.io.File;

import static org.acra.ACRA.LOG_TAG;

public class NoFileHtml extends AndroidNonvisibleComponent {

  public NoFileHtml(ComponentContainer container) {

    super(container.$form());
  }
  private String filePath;

  @SimpleFunction(description = "presents html text in a webviewer")
  public void NoFileHtml(String html, WebViewer webViewer) {

    //give webviewer file access for Kodular users
    WebView webView = (WebView)webViewer.getView();
    webView.getSettings().setAllowFileAccess(true);
    webView.getSettings().setAllowFileAccessFromFileURLs(true);
    webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
    webView.getSettings().setAllowContentAccess(true);

    //create html file
    try {
      java.io.File file = File.createTempFile("display", ".html");
      filePath = file.getAbsolutePath();
      FileWriter filewriter = new FileWriter(file);
      filewriter.write(html);
      filewriter.close();
      file.deleteOnExit();
    } catch (IOException e) {
      Log.e(LOG_TAG, "IOException", e);
    }
    //show html
    webViewer.GoToUrl("file://" + filePath);


  }





}
1 Like
29

building extension from https://ide.niotron.com/ gives error

30

It's a Rush project. To compile it from the Niotron IDE you need to add required annotations.

@DesignerComponent
@SimpleObject

31

oh ok

32

Great extension! Thanks!

Improved Security in NoFileHtml:
- Old: Used temporary files and deprecated WebView permissions (setAllowFileAccess, setAllowFileAccessFromFileURLs).
+ New: Direct HTML rendering using loadDataWithBaseURL with minimal WebView settings. Removed all file operations.
Goal: Prevent security vulnerabilities while maintaining full HTML rendering functionality.

package uk.co.metricrat.nofilehtml;

import android.util.Log;
import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.WebViewClient;
import com.google.appinventor.components.annotations.DesignerComponent;
import com.google.appinventor.components.annotations.SimpleFunction;
import com.google.appinventor.components.runtime.AndroidNonvisibleComponent;
import com.google.appinventor.components.runtime.ComponentContainer;
import com.google.appinventor.components.runtime.WebViewer;

@DesignerComponent(
    version = 2,
    description = "Renders HTML content directly in a WebViewer without using temporary files",
    nonVisible = true,
    iconName = "icon.png"
)
public class NoFileHtml extends AndroidNonvisibleComponent {
    
    public NoFileHtml(ComponentContainer container) {
        super(container.$form());
    }
    
    @SimpleFunction(description = "Renders HTML content safely in a WebViewer")
    public void NoFileHtml(String string, WebViewer webViewer) {
        try {
            final WebView webView = (WebView) webViewer.getView();
            
            // Configuração mínima necessária
            WebSettings settings = webView.getSettings();
            settings.setJavaScriptEnabled(true);
            
            // Configura um WebViewClient básico para melhor controle
            webView.setWebViewClient(new WebViewClient());
            
            // Carrega o conteúdo diretamente
            webView.loadDataWithBaseURL(
                null,                                    // baseUrl
                string,                                  // data
                "text/html; charset=UTF-8",             // mimeType
                "UTF-8",                                // encoding
                null                                    // historyUrl
            );
            
        } catch (Exception e) {
            Log.e("NoFileHtml", "Error rendering HTML content", e);
        }
    }
}
4 Likes
33

Nice revision @Passos_0213 :tada:

I compiled an aix (on RUSH) for others to test:

uk.co.metricrat.nofilehtmlV2.aix (4.6 KB)

(may/may not work on Kodular ?)

1 Like
34

I think it will be because this version doesn't save the html file anywhere, instead it loads the page directly from the String.

2 Likes
35

Done some testing.

In general works as expected, and can pull in resources (e.g. images / files etc) from online urls, shared directories, ASD, and assets.

Seems to be able to handle html comments, e.g. <!--comment-->, but still, as with V1, not coping with javascript comments e.g. //comment, inside script tags

Gets a :+1: from me.

Now set as the default extension in the first post

1 Like
36

Maybe it works with \/\/comment or adjust the code to escape those characters.