Develop Reference

How to display a Gyfcat iframe in an Android WebView

So I am trying to display a gif that I am pulling from reddit in a webview in my app. From the reddit api I retrieve a JSON of a posts data, and from media_embed/content I get the html of an iFrame from Gyfcat that looks like this:
<iframe class="embedly-embed" src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fgfycat.com%2Fifr%2Fhalffeistyharlequinbug&display_name=Gfycat&url=https%3A%2F%2Fgfycat.com%2Fhalffeistyharlequinbug&image=https%3A%2F%2Fthumbs.gfycat.com%2FHalfFeistyHarlequinbug-size_restricted.gif&key=2aa3c4d5f3de4f5b9120b660ad850dc9&type=text%2Fhtml&schema=gfycat" width="600" height="600" scrolling="no" title="Gfycat embed" frameborder="0" allow="autoplay; fullscreen" allowfullscreen="true"></iframe>
To this I URLDecode it like so:
val gifData = json["media_embed"]["content"]
val decoded = URLDecoder.decode(gifData, "UTF-8")
And I display it like so:
feedItemWebView.settings.javaScriptEnabled = true
feedItemWebView.loadData(decoded, "text/html", "UTF-8")
This gives me something that looks like this:
Instead of using URLDecoder I also tried doing this:
val decoded = gifData.replace("<", "<")
.replace(">", ">")
.replace("&", "&")
And putting this in the WebView in the same way as above results in the webview loading, but just displaying a still image (and not the gif as expected) like this:
Is there something I am missing that I need to do in order for it to actually play the gif?
If I try putting the same thing into an html file like this:
<iframe class="embedly-embed" src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fgfycat.com%2Fifr%2Fhalffeistyharlequinbug&display_name=Gfycat&url=https%3A%2F%2Fgfycat.com%2Fhalffeistyharlequinbug&image=https%3A%2F%2Fthumbs.gfycat.com%2FHalfFeistyHarlequinbug-size_restricted.gif&key=2aa3c4d5f3de4f5b9120b660ad850dc9&type=text%2Fhtml&schema=gfycat" width="600" height="600" scrolling="no" title="Gfycat embed" frameborder="0" allow="autoplay; fullscreen" allowfullscreen="true"></iframe>
my browser will load it correctly, so it must be something wrong with the WebView or my WebView settings

The issue was coming from a wrong configuration of the WebView. In fact, reading the logcat, this information came out from the webview:
I/chromium: [INFO:CONSOLE(26)] "Error reading storage", source: https://gfycat.com/assets/app.bfa24b4d87267ff469b0.js (26)
The iframe is loading an external script which use html5_webstorage also called localStorage. It is disabled by default in the webview (Security reason), so trying to access it was throwing an error which was preventing the video to play.
Therefore we need to turn it on like follow:
String data = "<iframe class=\"embedly-embed\" src=\"https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fgfycat.com%2Fifr%2Fhalffeistyharlequinbug&display_name=Gfycat&url=https%3A%2F%2Fgfycat.com%2Fhalffeistyharlequinbug&image=https%3A%2F%2Fthumbs.gfycat.com%2FHalfFeistyHarlequinbug-size_restricted.gif&key=2aa3c4d5f3de4f5b9120b660ad850dc9&type=text%2Fhtml&schema=gfycat\" width=\"600\" height=\"600\" scrolling=\"no\" title=\"Gfycat embed\" frameborder=\"0\" allow=\"autoplay; fullscreen\" allowfullscreen=\"true\"></iframe>\n";
webview = findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setDomStorageEnabled(true);
webview.getSettings().setDatabaseEnabled(true);
webview.loadData(data, "text/html", null);
I tested it on a really simple project considering you already got the iFrame html.

Unable show youtube embed video in Webview without "http/https"

Currently I'm working on news reader android app, and show article in webview, I have some issues when displaying embedded video from youtube, my WYSIWYG generate code below
<iframe height="360" width="640" src="//www.youtube.com/embed/PS6JupCFnNM" frameborder="0" allowfullscreen></iframe>
but it cannot load in webview, then I found something to fixed this problem, with adding http/https in src url like
<iframe width="560" height="315" src="https://www.youtube.com/embed/PS6JupCFnNM" frameborder="0" allowfullscreen></iframe>
the second format is original from youtube embed box that I copied from there, and it work, now what I supposed to do, is there a way to make webview show the youtube video with src="//www.youtube.com/embed/PS6JupCFnNM" format or I must modification my WYSIWYG instead?
thanks for your help. I hope my question does not duplicate with another webview question.

You have to use base url.
webView.loadDataWithBaseURL("http://.", htmlCode, TEXT_HTML, "UTF-8", "");

Switch to loadDataWithBaseURL(), where the base URL that you provide has the https scheme.

i was done by adding utf-8 encoding.
like that:
webview.loadData(html,"text/html", "utf-8");

Replace images of a HTML document with local Android resources, before loading the page in a WebView

I know that for security reasons HTML standard doesn't allow anymore the loading of a local resource as image in a document.
Anyway I found that I have to copy the html files in the android-asset project folder if I want to load local pages in a WebView.
What if I want to use an hybrid approach?
I would to get a HTML document from an uri, replace the value of the src attribute of a img HTML tag with a local path and then load the code in a WebView.
Having a html document like this:
<hmtl>
<head>
</head>
<body>
<img src="http://URL-SITE/img/x.jpg">
</body>
</hmtl>
How can i replace http://URL-SITE/img with the path of a local image resource
before the page is loaded by a WebView?
I already tried putting the local image in the folder android-asset and changing the src value in file:///android_asset/img/x.jpg but it didn't work.

Ok guys, thanks for the comments.
The problem was that I used the command loadData
String html ="<html> <head></head> "
+" <body> <img src=\"file:///android_asset/img/x.jpg\"> "
+"</body> </html>";
myWebView.loadData(html, "text/html; charset=UTF-8", null);
instead of
myWebView.loadDataWithBaseURL(null, html, "text/html", "UTF-8", null);

Issue embedding YouTube HTML5 in Android App

So I've searched around on SO a fair bit today and have made significant progress, but now I'm having an issue that I haven't seen pop up anywhere. I've embedded a YouTube video into an HTML file using an iframe as such:
<body>
<div align="center">
<iframe class="youtube-player" type="text/html" width="480" height="320"
src="http://www.youtube.com/embed/9DNAyD4ll6E?html5=1" frameborder="0">
</div>
</body>
and I'm displaying it in a WebView that I'm modifying in my activity like so:
WebView welcomeWebView = (WebView) findViewById(R.id.welcomeVideo);
welcomeWebView.setHorizontalScrollBarEnabled(false);
welcomeWebView.setVerticalScrollBarEnabled(false);
welcomeWebView.getSettings().setJavaScriptEnabled(true);
welcomeWebView.loadUrl("file:///android_asset/welcome.html");
The issue I'm having is that the still image display and controls show up, but when I click on play I'm presented with a gray screen that has a film strip and play icon in it. Here's the screen shots for the before/after for hitting play
http://www.ptrprograms.com/youtubeapp.png
http://www.ptrprograms.com/youtubeapp2.png
If anyone has seen this before or can point me in the right direction for displaying a video, I'd really appreciate it. Thank you!
EDIT: I also know that I can just use an intent to open it in a YouTube app, but my client (a non-profit that I'm donating this app to) is pretty specific about wanting it embedded into a page where we can have a textview with more information below it.

So I ditched the external asset for the webview and instead decided to load it in the activity itself, and it seems to work a lot better (it actually runs :))
WebView webView = (WebView) findViewById(R.id.welcomeVideo);
String play= "<html><body><div align=\"center\"> <iframe class=\"youtube-player\" type=\"text/html\" width=\"480\" height=\"320\" src=\"http://www.youtube.com/embed/9DNAyD4ll6E?rel=0\" frameborder=\"0\"></div></body></html>";
webView.setWebChromeClient(new WebChromeClient() {
});
webView.getSettings().setJavaScriptEnabled(true);
webView.loadData(play, "text/html", "utf-8");
webView.setBackgroundColor(0x00000000);

Android WebView loadWithBaseURL

I am wondering how do I set the path for WebViews loadWithBaseURL correctly.
What I want to do is, to load html in a webview, that uses resources that are stored on the external storage.
For Example:
<html>
<head>
<style>body{ background-image:url(beach.jpg); }</style>
</head>
<body>
<img src="football.jpg" />
</body>
</html>
Where beach.jpg and ball.jpg are stored directly in the "root" directory of the phones external storage (/sdcard/beach.jpg and /sdcard/ball.jpg)
So I tried to load the content as follows:
String html = "<html> ... example from above ... </html>";
String base = Environment.getExternalStorageDirectory().getAbsolutePath().toString();
webView.loadDataWithBaseURL("file://" + base, html, "text/html", "utf-8", null);
However the path seems to be wrong, because I can't see the image in the webview.
Any suggestions?

Have you enabled file access on the webview?
webView.getSettings().setAllowFileAccess(true);
Additionally, if you are constructing the HTML yourself - you might consider using full paths for the images.
String html = "<html>... <img src=\"file://"+base+"/football.jpg\" />";

Have you give internet permission?
<uses-permission android:name="android.permission.INTERNET" />
These may also help..
Android webview loadDataWithBaseURL how load images from assets?
http://myexperiencewithandroid.blogspot.com/2011/09/android-loaddatawithbaseurl.html
Android v2.2-2.3.5: WebView : loadDataWithBaseURL : will only load page once