绘制屏幕外的WebView为位图 [英] Drawing offscreen WebView to bitmap

问题描述

我想捕捉排出的屏幕在Android的用户带来的WebView的形象，我总是最后一个黑色的图像。这是正确的大小，一切都没有了。

I am trying to capture a image of a webview drawn off screen to the user in android and i always end up with a black image. It is the correct size and everything just not the

下面是code我使用的：

Here is the code I am using:

String theURL = "file:///android_asset/www/pages/page2.html";
        WebView webview = new WebView(ctx);
        webview.loadUrl(theURL);
        Bitmap bm = Bitmap.createBitmap(1000, 1000, Bitmap.Config.ARGB_8888);
        Canvas c = new Canvas(bm);
        webview.draw(c);
        OutputStream stream = null;
        try {
            stream = new FileOutputStream(Environment.getExternalStorageDirectory() +"/page.jpg");
            bm.compress(CompressFormat.JPEG, 80, stream);
            if (stream != null) stream.close();              
            return new PluginResult(PluginResult.Status.OK); 
        } catch (IOException e) {
            return new PluginResult(PluginResult.Status.ERROR, e.toString());
        } finally {
            bm.recycle();
        }       

感谢，如果有人可以提供帮助。

Thanks if anyone can help.

推荐答案

在 webview.loadUrl（theURL）; 启动页面的加载，这需要一段时间。等待你的画web视图在页面加载后，直到前。您可以使用 setWebViewClient（WebViewClient客户端）来建立一个对​​象，以接收通知，当网页加载完毕。

The webview.loadUrl(theURL); starts the loading of the page, that can take a while. Wait before drawing your webview until after the page is loaded. You can use a setWebViewClient(WebViewClient client) to set up an object to receive notice when the page has finished loading.

这篇关于绘制屏幕外的WebView为位图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！