How can I capture the whole view into a Bitmap when using crosswalk to display webpage?

Question

I use CrossWalk to display webpage, it works well. I have a feature to capture the whole content as bitmap to save into SDCard, but I cannot found a solution. Using TextureView can only capture a screen size bitmap, anyone has the same issue? BTW, I can capture the whole content using WebView.draw().

Answer 1

Here's some pseudo code that may help. You can get the content height and width from the webview and then you can leverage webview.draw()...so something like the following.

Bitmap  bitmap = Bitmap.createBitmap( webView.getWidth(), webView.getContentHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
webView.draw(canvas);

Then you can output your bitmap file using bitmap.compress and output it to a file output stream

//fos is a FileOutputStream, you can use something else if needed. bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);

The only issue I foresee with this is that your bitmap may clip the content horizontally since WebView doesn't have a method to get the content width. Otherwise I think this should work.

Answer 2

I never using crosswalk before, but I'm guessing the Crosswalk WebView is also descendant from android.view.View. If so, then you could use android view drawing cache. It look like this

yourWebView.setDrawingCacheEnabled(true);
Bitmap bmp = yourWebView.getDrawingCache();

Then as Paul said, save it through FileOutputStream

bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);