how to generate and save image of layout in android

1LinearLayout content = findViewById(R.id.rlid);
2content.setDrawingCacheEnabled(true);
3Bitmap bitmap = content.getDrawingCache();
4File file,f;                    
5if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED)) 
6    {  
7         file =new File(android.os.Environment.getExternalStorageDirectory(),"TTImages_cache");
8         if(!file.exists())
9        {
10          file.mkdirs();
11
12         } 
13         f = new File(file.getAbsolutePath()+file.seperator+ "filename"+".png");
14    }
15  FileOutputStream ostream = new FileOutputStream(f);                                   
16  bitmap.compress(CompressFormat.PNG, 10, ostream);
17  ostream.close();
18
19 } 
20 catch (Exception e){
21 e.printStackTrace();
22}
23