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Android连接服务器Servlet

　2013-03-03 13:33:45　来源：WEB开发网　　　

核心提示： 登陆页面输入用户名和密码，登陆成功后跳转到主页面，Android连接服务器Servlet，失败时显示错误信息，传递参数时用BasicNameValuePair的List以httpPost.setEntity的方式来做，不能用HttpParams，userName = (EditText) this.findViewB

登陆页面输入用户名和密码，登陆成功后跳转到主页面，失败时显示错误信息。传递参数时用BasicNameValuePair的List以httpPost.setEntity的方式来做，不能用HttpParams。

userName = (EditText) this.findViewById(R.id.editTextUserName);
password = (EditText) this.findViewById(R.id.editTextPassword);
errorMsg = (TextView) this.findViewById(R.id.textViewLoginMsg);
Button loginBtn = (Button) this.findViewById(R.id.btnLogin);
loginBtn.setOnClickListener(new OnClickListener() {


	@Override
	public void onClick(View arg0) {
		String result;
		/* 发送部分 */
		try {
			HttpClient httpClient = new DefaultHttpClient();
			String address = strUrl;
			HttpPost httpPost = new HttpPost(address);
			List<BasicNameValuePair> params = new LinkedList<BasicNameValuePair>();
			params.add(new BasicNameValuePair("username", userName.getText().toString()));
			params.add(new BasicNameValuePair("password", password.getText().toString()));
			httpPost.setEntity(new UrlEncodedFormEntity(params, "utf-8")); //将参数填入POST Entity中
			
			HttpResponse httpResponse = httpClient.execute(httpPost);
			/* 接收 */
			if (httpResponse.getStatusLine().getStatusCode() == 200) {
				result = EntityUtils.toString(httpResponse.getEntity());
				/* json文本解析 */
				JSONTokener jsonParser = new JSONTokener(result);
				
				JSONObject jsonResult = (JSONObject) jsonParser.nextValue();
				String status = jsonResult.getString("loginStatus");
				String outMessage = jsonResult.getString("outMessage");
				if(status.equals("true")){


					Intent i = new Intent(LoginActivity.this, MainActivity.class);
					i.putExtra("username", outMessage);
					startActivityForResult(i, FIRST_REQUEST_CODE);
				} else {
					errorMsg.setVisibility(View.VISIBLE);
					errorMsg.setText(outMessage);
				}
			} else {
				errorMsg.setVisibility(View.VISIBLE);
				errorMsg.setText("网络连接问题。CODE:" + httpResponse.getStatusLine().getStatusCode());
			}
		} catch (JSONException e) {
			e.printStackTrace();
		} catch (UnsupportedEncodingException e) {
			e.printStackTrace();
		} catch (ClientProtocolException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}


	}
});