android 通过httpclient下载文件并保存

/**
* 下载网络文件
* @param url  请求的文件链接
* @param IsMD5Name  是否MD5加密URL来命名文件名
* @param cachePath 保存的路径
* @return 返回文件的位置path
*/
public static String getDownloadFile2Cache(String url,boolean IsMD5Name,String cachePath)
{
String filePath = null;
try {
HttpGet httpRequest = new HttpGet(url);
HttpClient httpclient = new DefaultHttpClient();
HttpResponse response = (HttpResponse) httpclient.execute(httpRequest);
HttpEntity entity = response.getEntity();
BufferedHttpEntity bufferedHttpEntity = new BufferedHttpEntity(entity);
InputStream is = bufferedHttpEntity.getContent();
String fileName = null;
if(IsMD5Name) //是否以MD5命名下载的文件
{
fileName = MD5Util.To32MD5(url)+url.substring(url.lastIndexOf('.'));
}
else
{
fileName = url.substring(url.lastIndexOf('/')+1);
}
FileOutputStream fos = new FileOutputStream(cachePath+"/"+fileName);
byte buf[] = new byte[1024];
int numread;
while ((numread = is.read(buf)) != -1) {
fos.write(buf, 0, numread);
}
fos.close();
is.close();
filePath = cachePath+"/"+fileName;
} catch (IOException e) {
e.printStackTrace();
}catch (Exception e) {
e.printStackTrace();
}
return filePath;
}