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.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
|
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)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
|
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).
1
2
3
4
5
6
7
8
9
10
11
12
13
14
|
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.
1
2
3
4
|
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