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.
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)
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)
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).
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.
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
WebView.enableSlowWholeDocumentDraw();
}
setContentView(R.layout.activity_webview);
