android webView截图的4种方法

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.

代码语言：javascript复制

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)

代码语言：javascript复制

 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)

代码语言：javascript复制

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).

代码语言：javascript复制

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.

代码语言：javascript复制

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。

webview android

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