how to save images displayed in webview?

我想将webview中显示的图像保存到本地存储，并且webview应该缓存它显示的图像，如何访问缓存的图像并将它们保存到存储中？

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WebView webView = new WebView(this);
//your image is in webview

Picture picture = webView.capturePicture();
Canvas canvas = new Canvas();
picture.draw(canvas);
Bitmap image = Bitmap.createBitmap(picture.getWidth(),
picture.getHeight(),Config.ARGB_8888);
canvas.drawBitmap(mimage, 0, 0, null);
if(image != null) {
    ByteArrayOutputStream mByteArrayOS = new
    ByteArrayOutputStream();
    image.compress(Bitmap.CompressFormat.JPEG, 90, mByteArrayOS);
    try {
        fos = openFileOutput("image.jpg", MODE_WORLD_WRITEABLE);
        fos.write(mByteArrayOS.toByteArray());
        fos.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

尝试以上从webView捕获图像

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Then you have to set a WebViewClient to your WebView and override shouldOverrideUrlLoading and onLoadResource methods. Let me give you a simple example:

WebView yourWebView; // initialize it as always...
// this is the funny part:
yourWebView.setWebViewClient(yourWebClient);

// somewhere on your code...
WebViewClient yourWebClient = new WebViewClient(){
    // you tell the webclient you want to catch when a url is about to load
    @Override
    public boolean shouldOverrideUrlLoading(WebView  view, String  url){
        return true;
    }
    // here you execute an action when the URL you want is about to load
    @Override
    public void onLoadResource(WebView  view, String  url){
        if( url.equals("http://cnn.com") ){
            // do whatever you want
           //download the image from url and save it whereever you want
        }
    }
}

---

I did used the code from above and it "worked" but it was producing black images only so after a couple of hours here are my corrections, now it writes on the external sd card with no deprecation risks or path issues...

public void captureWV() {
    Picture picture = webview.capturePicture();
    Bitmap image = Bitmap.createBitmap(picture.getWidth(),picture.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(image);
    picture.draw(canvas);
    if (image != null) {
        ByteArrayOutputStream mByteArrayOS = new ByteArrayOutputStream();
        image.compress(Bitmap.CompressFormat.JPEG, 90, mByteArrayOS);
        try {
            File sdCard = Environment.getExternalStorageDirectory();
            File dir = new File(sdCard.getAbsolutePath());
            File file = new File(dir, "filename.jpg");
            FileOutputStream fos = new FileOutputStream(file);
            fos.write(mByteArrayOS.toByteArray());
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

also here is the beginning of my MainActivity

public class MainActivity extends Activity {
private static final String URL = "http://punto.gt"; //your website
WebView webview;
// your code here
}

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