how copy drawable in android?
<p>hi i would like copy a drawable in a file with android. My problems are my image file are completely black. I don't know why.</p>

<pre><code>    try{
    Drawable image = getResources().getDrawable(R.drawable.header);
    Bitmap  bitmap = Bitmap.createBitmap( image.getMinimumWidth(), image.getMinimumHeight(), Bitmap.Config.ARGB_8888);  
        File fs = new File(Environment.getExternalStorageDirectory()+"/file/header.png");                                   
        FileOutputStream fos;
        fos = new FileOutputStream(fs);
        Canvas canvas = new Canvas(bitmap);
        image.draw(canvas);
        bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos); 
        //refermer
        fos.flush();
        fos.close(); 
        } catch (IOException e) {
             e.printStackTrace();
        }
</code></pre>
