android copy sqlite database

copy_sqlite_db

File dbPath = getDatabasePath("taobaoclient.db");
        if (!dbPath.exists()) {
            try	{
            	InputStream is = getAssets().open("databases/taobaoclient.db");
                int size = is.available();
                byte[] buffer = new byte[size];
                is.read(buffer);
                is.close();
                
				FileOutputStream fos = new FileOutputStream(dbPath);
			    fos.write(buffer);
			    fos.close();
			}catch (Exception e){
				Log.e("Fck", e.getMessage());
			}            
        }
        try{
        	db = SQLiteDatabase.openDatabase(dbPath.getAbsolutePath(), null, SQLiteDatabase.OPEN_READWRITE);
        }catch(Exception e){
        	Log.e("fck", e.getMessage());
        }