Android读取服务器图片的三种方法

public static Bitmap getImage(String path){      try {     HttpURLConnection conn = (HttpURLConnection) new URL(path).openConnection();     conn.setConnectTimeout(5000);     conn.setRequestMethod("GET");     System.out.println("tdw1");     if(conn.getResponseCode() == 200){       InputStream inputStream = conn.getInputStream();       Bitmap bitmap = BitmapFactory.decodeStream(inputStream);         return bitmap;     }   } catch (Exception e) {     e.printStackTrace();   }   return null; } 

image.setImageBitmap(getImage("路径")); 

public static Bitmap getImage1(String path){        HttpGet get = new HttpGet(path);     HttpClient client = new DefaultHttpClient();     Bitmap pic = null;      try {       HttpResponse response = client.execute(get);       HttpEntity entity = response.getEntity();       InputStream is = entity.getContent();        pic = BitmapFactory.decodeStream(is);  // 关键是这句代   } catch (Exception e) {     e.printStackTrace();   }   return pic; } 

public static Uri getImage2(String path,File cacheDir){     File localFile = new File(cacheDir,MD5.getMD5(path)+path.substring(path.lastIndexOf(".")));     if(localFile.exists()){       return Uri.fromFile(localFile);     }else     {       HttpURLConnection conn;       try {         conn = (HttpURLConnection) new URL(path).openConnection();         conn.setConnectTimeout(5000);         conn.setRequestMethod("GET");         if(conn.getResponseCode() == 200){           System.out.println("tdw");           FileOutputStream outputStream = new FileOutputStream(localFile);           InputStream inputStream = conn.getInputStream();           byte[] buffer = new byte[1024];           int length = 0;           while((length=inputStream.read(buffer))!=-1){             outputStream.write(buffer, 0, length);           }           inputStream.close();           outputStream.close();           return Uri.fromFile(localFile);         }       } catch (Exception e) {         // TODO Auto-generated catch block         e.printStackTrace();       }     }     return null;     } 

image.setImageURI(getImage2(path, cache)); 

cache = new File(Environment.getExternalStorageDirectory(),"cache"); if(!cache.exists()){   cache.mkdirs(); }