How can I programmatically take a screenshot of a

问题:

I think the title pretty much covers it, but I have a webview in my activity. I've loaded a url into the webview and I'd like to take a screenshot of the full page (whatever is in the viewport and the stuff "below the fold" as well).

I've got code that works to snapshot the viewport, and I know this can be done in iOS by enlarging the webview before snapshotting it. I've tried to use the same technique here:

    WebView browserView = (WebView) findViewById(R.id.browserView);

    //Resize the webview to the height of the webpage
    int pageHeight = browserView.getContentHeight();
    LayoutParams browserParams = browserView.getLayoutParams();
    browserView.setLayoutParams(new LinearLayout.LayoutParams(LayoutParams.FILL_PARENT, pageHeight));

    //Capture the webview as a bitmap
    browserView.setDrawingCacheEnabled(true);
    Bitmap bitmap = Bitmap.createBitmap(browserView.getDrawingCache());
    browserView.setDrawingCacheEnabled(false);

    //Create the filename to use
    String randomFilenamepart = String.valueOf(new SecureRandom().nextInt(1000000));
    String filename = Environment.getExternalStorageDirectory().toString() + "/Screenshot_" + randomFilenamepart + ".jpg";
    File imageFile = new File(filename);
    //Stream the file out to external storage as a JPEG
    OutputStream fout = null;
    try {
        fout = new FileOutputStream(imageFile);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fout);
        fout.flush();
        fout.close();
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        browserView.setLayoutParams(browserParams);
    }

But I'm still only capturing just the viewport. Disregarding things like running out of memory because the page is too large, does anyone know what I'm doing wrong or how I can include the portion outside the viewport?

回答1:

Try this one

     import java.io.FileOutputStream;
     import android.app.Activity;
     import android.graphics.Bitmap;
     import android.graphics.Canvas;
     import android.graphics.Picture;
     import android.os.Bundle;
     import android.view.Menu;
     import android.webkit.WebView;
     import android.webkit.WebViewClient;

      public class MainActivity extends Activity {

WebView w ;
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    w = new WebView(this);
    w.setWebViewClient(new WebViewClient()
    {
            public void onPageFinished(WebView view, String url)
            {
                    Picture picture = view.capturePicture();
                    Bitmap  b = Bitmap.createBitmap( picture.getWidth(),
                    picture.getHeight(), Bitmap.Config.ARGB_8888);
                    Canvas c = new Canvas( b );

                    picture.draw( c );
                    FileOutputStream fos = null;
                    try {

                        fos = new FileOutputStream( "mnt/sdcard/yahoo.jpg" );
                            if ( fos != null )
                            {
                                b.compress(Bitmap.CompressFormat.JPEG, 100, fos);

                                fos.close();
                            }
                        }
                   catch( Exception e )
                   {

                   }
          }
      });

    setContentView(w);
    w.loadUrl("http://search.yahoo.com/search?p=android");
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.activity_main, menu);
    return true;
}

}

Add INTERNET PERMISSION and WRITE_EXTERNAL_STORAGE in AndroidManifest.xml file.

Need to ask permission at run time for file write if app is running on or above Marshmallow.

回答2:

@avinash thakur codes actually works, you just forget to mention to add <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> at Android Manifest file, otherwise, android wont allow your stream to write data / file on device.

cheers.