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Android: Easiest way to make a WebView display a Bitmap?

Answer 1

A:

You can just use webview to directly view your image remotely. You do not need to save anymore the image in a file. Here is a sample code snippet.

myWebView.getSettings().setBuiltInZoomControls(true); //to get zoom functionalities

String url = "http://....."; //url of your image

String x= "<html><head><meta name=\"viewport\" content=\"width=device-width, minimum-scale=1.0\"/><style type=\"text/css\">html, body {margin: 0;padding: 0;} img {border: none;}</style><head><body style=\"background: black;\"><table><tr><td align=\"center\"><img src=\"" + url + "\" /></td></tr></table></body></html>";

myWebView.loadData(x, "text/html", "UTF-8");

About switching images, you can just change the value of the url and call the loadData again of the webview.

M.A. Cape 2010-05-31 06:42:36

The reason why I want to pass Bitmap data that I already loaded is that this way my application can cache the image (in my case in the database) so it will only have to be loaded once.

legr3c 2010-05-31 07:14:14

As far as I know, webview has already a caching feature. You can override its behavior by specifying its cache mode.myWebView.getSettings().setCacheMode(mode);You can refer to this link.http://developer.android.com/intl/de/reference/android/webkit/WebSettings.htmlYou may use the 'LOAD_CACHE_ELSE_NETWORK' as the mode wherein it uses cache if content is there, even if expired else, load from network.Another way is to manually handle the zooming, panning and caching by yourself without using webview. You can look at the code ViewImage.java under camera package of the android source code.

M.A. Cape 2010-05-31 07:59:03

Answer 2

A:

I wasn't satisfied with WebView after all so I ended up creating my own image viewing Activity. Further descriptions on how I did it can be found in this post on google groups.

legr3c 2010-06-15 12:18:34

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Android: Easiest way to make a WebView display a Bitmap?

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