毕业论文—android客户端

LogoAcitivty

private void showImg(final float startAlpha, final int drawableId, int delay)    {        new Handler().postDelayed(new Runnable()        {            @Override            public void run()            {                logo_imageView.setImageResource(drawableId);                AlphaAnimation animation = new AlphaAnimation(startAlpha, 1.0f);                animation.setDuration(1000);                logo_imageView.startAnimation(animation);            }        }, delay);}

客户端与服务端交互数据

public static HttpClient getHttpClient()    {        // 创建 HttpParams 以用来设置 HTTP 参数（这一部分不是必需的）        HttpParams httpParams = new BasicHttpParams();        // 设置连接超时和 Socket 超时，以及 Socket 缓存大小        HttpConnectionParams.setConnectionTimeout(httpParams, 5 * 1000);        HttpConnectionParams.setSoTimeout(httpParams, 5 * 1000);        HttpConnectionParams.setSocketBufferSize(httpParams, 8192);        // 设置重定向，缺省为 true        HttpClientParams.setRedirecting(httpParams, true);        // 设置 user agent        String userAgent = "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.2) Gecko/20100115 Firefox/3.6";        HttpProtocolParams.setUserAgent(httpParams, userAgent);        // 创建一个 HttpClient 实例        // 注意 HttpClient httpClient = new HttpClient(); 是Commons HttpClient        // 中的用法，在 Android 1.5 中我们需要使用 Apache 的缺省实现 DefaultHttpClient        HttpClient httpClient = new DefaultHttpClient(httpParams);        return httpClient;    }

post请求

   public static String postRequest(String url, Map<String, String> rawParams)            throws Exception    {        // 创建HttpPost对象。        HttpPost post = new HttpPost(url);        // 如果传递参数个数比较多的话可以对传递的参数进行封装        List<NameValuePair> params = new ArrayList<NameValuePair>();        for (String key : rawParams.keySet())        {            // 封装请求参数            params.add(new BasicNameValuePair(key, rawParams.get(key)));        }        // 设置请求参数        post.setEntity(new UrlEncodedFormEntity(params, "utf-8"));        // 发送POST请求        HttpResponse httpResponse = httpClient.execute(post);        // httpClient.getParams().setParameter(        // CoreConnectionPNames.CONNECTION_TIMEOUT, 60000);        // 如果服务器成功地返回响应        if (httpResponse.getStatusLine().getStatusCode() == 200)        {            // 获取服务器响应字符串            String result = EntityUtils.toString(httpResponse.getEntity());            return result;        }        return null;    }

客户端实际调用postrequest()

final List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();        try        {            JSONArray jsonArray = new JSONArray(URLDecoder.decode(HttpUtil                    .queryStringForPost(LESSON_URL), "UTF-8"));            for (int i = 0; i < jsonArray.length(); i++)            {                HashMap<String, Object> hashMap = new HashMap<String, Object>();                JSONObject jsonObject = jsonArray.getJSONObject(i);                hashMap.put(SQLUtil.ST_LESSONS_LESSON_NAME, jsonObject                        .get(SQLUtil.ST_LESSONS_LESSON_NAME));                list.add(hashMap);            }        }        catch (UnsupportedEncodingException e)        {            e.printStackTrace();        }        catch (JSONException e)        {            e.printStackTrace();        }

登录验证代码实现

private boolean validate()    {        String student_id = et_id.getText().toString().trim();        String student_pwd = et_pwd.getText().toString().trim();        if (student_id.equals(""))        {            et_id.setFocusable(true);            et_id.requestFocus();            Toast                    .makeText(LoginActivity2.this, "亲，帐号为空的噢！",                            Toast.LENGTH_SHORT).show();            return false;        }        else if (student_pwd.equals(""))        {            et_pwd.setFocusable(true);            et_pwd.requestFocus();            Toast.makeText(LoginActivity2.this, "亲，密码可是为空的哦！",                    Toast.LENGTH_SHORT).show();            return false;        }        else        {            return true;        }    }    

试卷和课程主要功能代码实现

 listView.setOnItemClickListener(new OnItemClickListener()        {            @Override            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,                    long arg3)            {                studentTaoti.setTaoti_name(list.get(arg2).get(                        SQLUtil.ST_TAOTIS_TAOTI_NAME).toString());                studentTaoti.setTaoti_score(Integer.parseInt(list.get(arg2)                        .get(SQLUtil.ST_TAOTIS_TAOTI_SCORE).toString()));                studentTaoti.setTaoti_time(Integer.parseInt(list.get(arg2).get(                        SQLUtil.ST_TAOTIS_TAOTI_TIME).toString()));                studentTaoti.setTaoti_descript(list.get(arg2).get(                        SQLUtil.ST_TAOTIS_TAOTI_DESCRIPT).toString());                String url = HttpUtil.BASE_URL + QuestionActivity.QUESTION_URL;                HashMap<String, String> param = new HashMap<String, String>();                param.put(SQLUtil.ST_TAOTIS_TAOTI_NAME, studentTaoti                        .getTaoti_name());                try                {                    JSONArray jsonArray = new JSONArray(URLDecoder.decode(                            HttpUtil.postRequest(url, param), "UTF-8"));                    if (jsonArray.length() != 0)                    {                        Intent intent = new Intent(TaotiActivity.this,                                QuestionActivity.class);                        startActivity(intent);                    }                    else                    {                        Toast.makeText(TaotiActivity.this,                                "亲，" + studentTaoti.getTaoti_name() + "没有题目啊！",                                Toast.LENGTH_SHORT).show();                    }                }                catch (UnsupportedEncodingException e)                {                    e.printStackTrace();                }                catch (JSONException e)                {                    e.printStackTrace();                }                catch (Exception e)                {                    e.printStackTrace();                }            }        });