request response 下载文件

自我感觉,这是所有 网络请求框架的雏形.

根据URL下载APK

if (!URLUtil.isNetworkUrl(strPath)) {        Log.i(this.getClass().getName(), "getDataSource() It's a wrong URL!");        runException = "error";        return "error";    }    InputStream is = null;    FileOutputStream fos = null;    Float apkSize = null;// apk实际大小    try {        //Const.getConst().pageRequestUrl+ "mt/MTCon/downloadHelpFile.json"        URL myURL = new URL(Const.getConst().pageRequestUrl+ "mt/MTCon/downloadHelpFile.json?note=DOWNLOAD_APP");        URLConnection conn = myURL.openConnection();        conn.setConnectTimeout(10000);        conn.connect();        is = conn.getInputStream();        if (is == null) {            throw new RuntimeException("stream is null");        }        apkSize = (float) (17*1024(float) conn.getContentLength());// 下载总大小        String fileEx = strPath.substring(strPath.lastIndexOf(".") + 1, strPath.length())                .toLowerCase();// 下载文件名        String fileNa = strPath.substring(strPath.lastIndexOf("/") + 1,                strPath.lastIndexOf("."));// 下载文件后缀        // 判断SD卡是否存在,存在则存于SDK,不存在写手机内存        boolean hasSD = Environment.getExternalStorageState().equals(                android.os.Environment.MEDIA_MOUNTED);        Log.i("下载文件", "apkSize="+apkSize);        Log.i("下载文件", "hasSD="+hasSD);        // 文件会自动下载保存至“/data/data/[包名]/files/[文件名]        myTempFile = new File("/data/data/" + activity.getPackageName() + "/files/" + fileNa                + "." + fileEx);        //保存到sd卡中//          myTempFile = new File(Environment.getExternalStorageDirectory()+"/dowload/" + fileNa + "." + fileEx);//          Log.i("下载文件", "myTempFile="+myTempFile.getAbsolutePath());        fos = activity.openFileOutput(fileNa + "." + fileEx, Context.MODE_WORLD_WRITEABLE|Context.MODE_WORLD_READABLE);        float alreadySize = (float) 0;// 已下载的大小        byte buf[] = new byte[1024];        do {            int numread = is.read(buf);            if (numread <= 0) {                break;            }            fos.write(buf, 0, numread);            alreadySize = alreadySize + buf.length;            NumberFormat nf = NumberFormat.getPercentInstance();            String proportion = nf.format(alreadySize / apkSize);            // 往UI线程传进度值            publishProgress(Integer.valueOf(proportion.substring(0, proportion.length() - 1)));        } while (isRun);    } catch (Exception e) {        e.printStackTrace();        runException = "error";        return "error";    } finally {        if (is != null) {            try {                is.close();            } catch (IOException e) {            }        }        if (fos != null) {            try {                fos.close();            } catch (IOException e) {            }        }    }    return null;

根据参数,下载文件

    String readContent=null;        DefaultHttpClient httpClient = new DefaultHttpClient();    CookieStore cookiestore = null;    HttpUriRequest request = null;    request = new HttpPost(Const.getConst().pageRequestUrl+ "mt/MTCon/downloadHelpFile.json?note=DOWNLOAD_APP"");    request.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT,            60000);    request.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 60000);    request.setHeader("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");        UrlEncodedFormEntity entity = null;        try {            entity = new UrlEncodedFormEntity(list, "UTF-8");        } catch (UnsupportedEncodingException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        ((HttpPost) request).setEntity(entity);    }    if (cookiestore != null) {        httpClient.setCookieStore(cookiestore);    }    HttpResponse response = null;    try {        response = httpClient.execute(request);    } catch (ClientProtocolException e) {        // TODO Auto-generated catch block        e.printStackTrace();    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }         try{        if (response != null) {                //getResponse                InputStream in=(InputStream) response.getEntity().getContent();                int count = 0;                while (count == 0) {                 count = Integer.parseInt(in.available()+"");//in.available();                }                byte[] bytes = new byte[count];                int readCount = 0; // 已经成功读取的字节的个数                while (readCount <= count) {                 if(readCount == count)break;                 readCount += in.read(bytes, readCount, count - readCount);                }                long length_tmp = 1024*1024*1024;              long index = 0;// start from zero              int readSize;            //  byte[] bytes = new byte[1024];               while ((readSize = in.read(bytes, (int) index, (int) 1024)) != -1) {                  length_tmp -= readSize;                  if (length_tmp == 0) {                      break;                  }                  index = index + readSize;              }              //转换成字符串                System.out.println("2.Get Response Content():\n"+readContent);            }            }catch (Exception e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return null;