public interface Callback {  public void onSucc();  public void onFail(String msg); }

////////////////////////

   @Override    public void onClick(View v) {

    this.getServerAppVersion(new Callback() {

     @Override      public void onSucc() {

      new AlertDialog.Builder(MoreVersionActivity.this)         .setTitle("版本更新检测")         .setMessage("检测到新版本，是否下载更新？")         .setPositiveButton("是",           new DialogInterface.OnClickListener() {            @Override            public void onClick(              DialogInterface dialog,              int which) {             MoreVersionActivity.this               .downloadApp();            }           }).setNegativeButton("否", null)         .setCancelable(false).show();

     }

     @Override      public void onFail(String msg) {       // Log.e("FindEventAddActivity", msg);      }

    });

   }

public String getServerAppVersion(final Callback callback) {

  RequestParams params = new RequestParams();

  CommunicationTools.communication(Const.GET_SERVER_APP_VERSION_PATH,     params, new JsonHttpResponseHandler() {      @Override      public void onSuccess(JSONObject data) {       // 是否上传数据成功       try {        String serverVersion = data.getString("versionNo");

       String currentVsersion = MoreVersionActivity.this          .getVersion();

       if (serverVersion != null          && serverVersion.contains("s")) {         serverVersion = serverVersion.replace("s", "");        }

       if (!serverVersion.equals(currentVsersion)) {         callback.onSucc();        } else {         PublicMethods.showToastTopShort(           getApplicationContext(), "已经是最新版本！");        }       } catch (JSONException e) {        PublicMethods.showToastTopShort(          getApplicationContext(), "网络连接失败！");        e.printStackTrace();       }

     }

     @Override      public void onFailure(Throwable arg0) {       PublicMethods.showToastTopShort(         getApplicationContext(), "网络连接失败！");       callback.onFail("服务器连接失败");      }     });

  return null;  }

///////////////////////////////////////////////////

new Thread(new Runnable() {    @Override    public void run() {     Looper.prepare();     try {      URL url = new URL(Const.GET_SERVER_APP_DOWNLOAD_PATH);      HttpURLConnection urlConn = (HttpURLConnection) url        .openConnection();      urlConn.setRequestProperty("Accept-Encoding", "identity");      urlConn.connect();      urlConn.setConnectTimeout(60 * 1000);      InputStream is = urlConn.getInputStream();      Message msg = handler.obtainMessage(0);      msg.obj = urlConn.getContentLength();      msg.sendToTarget();      downFile(is);     } catch (Exception e) {      e.printStackTrace();      // PublicMethods.showToastTopShort(getApplicationContext(),      // "下载失败！");      new AlertDialog.Builder(MoreVersionActivity.this)        .setTitle("提示").setMessage("下载失败，请检查网络是否正常，稍后重试！")        .setPositiveButton("确定", null).setCancelable(false)        .show();     }     Looper.loop();

   }   }).start();

杂乱代码1