android 在webView里面截图大概有四种方式，具体内容如下
1.获取到DecorView然后将DecorView转换成bitmap然后写入到文件里面.
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View view = getWindow().getDecorView(); Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); view.draw(canvas); Log.d(TAG,"bitmap--"+bitmap); try { String fileName = Environment.getExternalStorageDirectory().getPath()+"/webview_jietu.jpg"; FileOutputStream fos = new FileOutputStream(fileName); //压缩bitmap到输出流中 bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos); fos.close(); Toast.makeText(WebviewFromGetDecorView.this, "截屏成功", Toast.LENGTH_LONG).show(); } catch (Exception e) { Log.e(TAG, e.getMessage()); }finally { if(bitmap!=null) { bitmap.recycle(); }} |
2.使用webViewpicture来实现该功能.(该方法被废弃了因此不建议使用)
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Picture picture = webView.capturePicture(); int width = picture.getWidth(); int height = picture.getHeight(); if (width > 0 && height > 0) { Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); picture.draw(canvas); try { String fileName = Environment.getExternalStorageDirectory().getPath()+"/webview_jietu.jpg"; FileOutputStream fos = new FileOutputStream(fileName); //压缩bitmap到输出流中 bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos); fos.close(); Toast.makeText(WebviewFromCapture.this, "截屏成功", Toast.LENGTH_LONG).show(); bitmap.recycle(); } catch (Exception e) { Log.e(TAG, e.getMessage()); }} |
3.使用webViewDraw来实现.(该方法被废弃了因此不建议使用)
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float scale = webView.getScale(); int webViewHeight = (int) (webView.getContentHeight()*scale+0.5); Bitmap bitmap = Bitmap.createBitmap(webView.getWidth(),webViewHeight, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmap); webView.draw(canvas); try { String fileName = Environment.getExternalStorageDirectory().getPath()+"/webview_jietu.jpg"; FileOutputStream fos = new FileOutputStream(fileName); //压缩bitmap到输出流中 bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos); fos.close(); Toast.makeText(WebviewFromDraw.this, "截屏成功", Toast.LENGTH_LONG).show(); bitmap.recycle(); } catch (Exception e) { Log.e(TAG, e.getMessage());} |
4.使用webViewDrawCache来实现(建议使用).
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Bitmap bitmap = webView.getDrawingCache(); try { String fileName = Environment.getExternalStorageDirectory().getPath() + "/webview_jietu.jpg"; FileOutputStream fos = new FileOutputStream(fileName); //压缩bitmap到输出流中 bitmap.compress(Bitmap.CompressFormat.JPEG, 70, fos); bitmap.recycle(); fos.close(); Toast.makeText(WebviewFromDrawCache.this, "截屏成功", Toast.LENGTH_LONG).show();} catch (Exception e) { Log.e(TAG, e.getMessage()); } finally { bitmap.recycle();} |
注意:
在android5.0及以上版本使用webView进行截长图时,默认是截取可是区域内的内容.因此需要在支撑窗体内容之前加上如下方法.
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if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { WebView.enableSlowWholeDocumentDraw(); } setContentView(R.layout.activity_webview); |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/unreliable_narrator/article/details/75650363
