Question

I have a webview. I want to get its drawing cache and and save it as a file in sdcard. I used following code:

WebView wv=new WebView(this);
wv.loadData(rawHtml,"text/html",null); // rawHtml is my html code
wv.buildDrawingCacheEnabled(true);
Bitmap bmp=wv.getDrawingCache(); 

Dont know why wv.getDrawingCache() always returns null.
I have tested my html code using:

setContentView(wv);

Its displaying properly.

Answer 1

Are you using this method immediately in the onCreate()? If yes then you might have to consider overriding the below method,

@Override 
public void onWindowFocusChanged(boolean hasFocus) 
{ 
     // TODO Auto-generated method stub 
     super.onWindowFocusChanged(hasFocus);
    Bitmap bmp=wv.getDrawingCache();
}

This method gets called as soon as your view gets drawn. And this is where you will get a view at all.