android 设置网络请求超时

浏览数：32 / 时间：2015年06月11日

UI界面更新必须在ui线程中不能在ruanable线程中操作ui 可以发送消息利用handler来更新ui
   private void load() {
       LoadDate load = new LoadDate();
       load.execute("http://h.hiphotos.baidu.com/image/w%3D310/sign=1bc9c0da38292df597c3aa148c305ce2/c83d70cf3bc79f3d77fbe1c5b8a1cd11728b2928.jpg");
   }

   class LoadDate extends AsyncTask<String, Integer, Bitmap> {

       @Override
       protected void onPreExecute() {

//           myDialog.setTitle("请稍候");
//           myDialog.setMessage("loading......");
//           myDialog.setCanceledOnTouchOutside(false);
//           myDialog.show();
       }

       @Override
       protected Bitmap doInBackground(String... params) {
           URL myFileUrl = null;
           Bitmap bitmap = null;
           InputStream is = null;
           HttpURLConnection conn = null;


           try {
                    myFileUrl = new URL(params[0]);
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                }
                try {
                    conn = (HttpURLConnection)myFileUrl
                            .openConnection();
                    conn.setDoInput(true);
                    conn.connect();
                    conn.setConnectTimeout(3000);
                    conn.setReadTimeout(3000);
                    is =conn.getInputStream();
                    bitmap =BitmapFactory.decodeStream(is);
                    is.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }finally{
                        try {
                            if(is != null){
                            is.close();
                            }
                            if( conn != null){
                                conn.disconnect();
                            }
                        } catch (IOException e) {
                            // TODO Auto-generated catch block
                            e.printStackTrace();
                        }
                }
                startTime(bitmap);
                return bitmap;

       }

       Handler myHandler=new Handler(){
           public void handleMessage(Message msg) {
               if(msg.what==1){
                   Toast.makeText(MainActivity.this, "连接服务器超时"+msg.obj, 1).show();
               }
           };
       };
       private void startTime( final Bitmap bm) {
           Runnable run=new Runnable() {
               boolean isRun=true;
               long enableTime;
               long startTime=System.currentTimeMillis();
               @Override
               public void run() {
                   System.out.println(bm+"---bm----");
                   while(isRun){
                       enableTime=System.currentTimeMillis()-startTime;
                       if(enableTime>=3000 &&bm==null){
                           Message message = new Message();
                            message.what = 1;
                            message.obj="demo";
                            myHandler.sendMessage(message);
//                           Toast.makeText(MainActivity.this, "连接服务器超时", 1).show();
                           isRun=false;
                       }
                       try{
                                Thread.sleep(50);
                            }catch (Exception e) {
                                System.out.println("计时器线程 sleep ex:"+e.toString());
                            }
                        }
                        System.out.println("计时器线程run..end time:"+enableTime);
                    }
                };
//                Looper.prepare();

                new Thread(run).start();

       }

       @Override
       protected void onPostExecute(Bitmap result) {
           image.setImageBitmap(result);
//           myDialog.cancel();
           System.out.println(result+"---");
       }
   }

}