如何以编程方式截取webview的屏幕截图,捕获整页？

Question

我认为标题几乎涵盖了它,但我的活动中有一个webview.我已经在网页视图中加载了一个网址,我想要整个页面的截图(视口中的内容以及"下方"的内容).

我有代码可以对视口进行快照,我知道这可以通过在快照之前放大webview来在iOS中完成.我试过在这里使用相同的技术:

    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);
    }

但我仍然只捕捉视口.由于页面太大,忽略了内存不足等问题,是否有人知道我做错了什么或者如何在视口外包含部分？

Answer 1

试试这个吧

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;
    }
}

在AndroidManifest.xml文件中添加INTERNET PERMISSION和WRITE_EXTERNAL_STORAGE.

如果应用程序在Marshmallow上或上方运行,则需要在运行时请求权限以进行文件写入.

Answer 2

webview.capturePicture() 已弃用，使用以下方式可以：

Bitmap bitmap = Bitmap.createBitmap(webview.getWidth(), webview.getHeight(), Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
webview.draw(canvas);
return bitmap;