android获取网络数据

android获取网络数据有字符串、图片、文件对于不同的数据的获取方法如下
字符串：

public String getDataFromServer(String Urlpath) {        String result="";        HttpClient httpclient = new DefaultHttpClient();        HttpGet httpget = new HttpGet(Urlpath);        HttpResponse response;        try {            response = httpclient.execute(httpget);            HttpEntity entity = response.getEntity();            if (entity != null) {            InputStream is = entity.getContent();            InputStreamReader isr = new InputStreamReader(is);            BufferedReader bufferReader = new BufferedReader(isr);            String inputLine = "";            int i=1;            while ((inputLine = bufferReader.readLine()) != null) {                  result += inputLine + "\n";                Log.i("getDataFromServer","inputLine"+i+":"+inputLine);                i=i+1;            }            }        } catch (ClientProtocolException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return result;    }

图片：

public Bitmap getHttpBitmap(final String url) {                try {                    myFileURL = new URL(url);                    HttpURLConnection conn = (HttpURLConnection) myFileURL                            .openConnection();                    conn.setConnectTimeout(6000);                    conn.setDoInput(true);                    conn.setUseCaches(false);                    InputStream is = conn.getInputStream();                    BitmapFactory.Options   opts = new BitmapFactory.Options();                    opts.inJustDecodeBounds=true;                    byte[] data = getBytes(is);                    BitmapFactory.decodeByteArray(data, 0,data.length,opts);                    Log.i("ImageLoader","width="+opts.outWidth+",height="+opts.outHeight);                    opts.inJustDecodeBounds=false;                    opts.inSampleSize=calculateInSampleSize(opts,150,300);                    opts.inPreferredConfig = Bitmap.Config.ARGB_8888;                    bitmap = BitmapFactory.decodeByteArray(data, 0,data.length,opts);                    Log.i("ImageLoader","houwidth="+bitmap.getWidth()+",houheight="+bitmap.getHeight());                } catch (Exception e) {                    e.printStackTrace();                    Log.i("HttpUtils","getHttpBitmap异常");                }finally{                    if(is!=null){                        try {                            is.close();                        } catch (IOException e) {                            e.printStackTrace();                        }                    }                }        return bitmap;    }

文件：

public String DownloadFile(String fileURL, File directory) {        String code = "";        try {            HttpClient httpclient = new DefaultHttpClient();            HttpGet httpget = new HttpGet(fileURL);            HttpResponse response = httpclient.execute(httpget);            HttpEntity entity = response.getEntity();            if (entity != null) {                InputStream instream = entity.getContent();                code = String.valueOf(response.getStatusLine().getStatusCode());                FileOutputStream f = new FileOutputStream(directory);                int l;                byte[] tmp = new byte[2048];                while ((l = instream.read(tmp)) != -1) {                    f.write(tmp, 0, l);                }                f.close();            }        } catch (IOException e) {            e.printStackTrace();            Log.i("HttpUtils","DownloadFile异常");        } finally {        }        return code;    }

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