5.AsyncHttp、post

httpClient

	// 网络访问请求
		new Thread(new Runnable() {

			@Override
			public void run() {
				String url = "http://192.168.1.101:8080/ChatServer/register";
				// 创建 httpClient
				HttpClient client = new DefaultHttpClient();

				// 创建 post请求
				HttpPost post = new HttpPost(url);
				List<NameValuePair> pairs = new ArrayList<NameValuePair>();
				// 配置请求头
				// post.addHeader("", "");

				// 配置请求参数
				pairs.add(new BasicNameValuePair("account", account));
				pairs.add(new BasicNameValuePair("password", password));

				try {
					post.setEntity(new UrlEncodedFormEntity(pairs));
					HttpResponse response = client.execute(post);

					int statusCode = response.getStatusLine().getStatusCode();
					if (statusCode == 200) {
						// 拿到网络的返回结果
						final String result = EntityUtils.toString(response
								.OgetEntity());

						Log.d("result : ", "" + result);
						// 需要在主线线程中做UI操作

						getActivity().runOnUiThread(new Runnable() {

							@Override
							public void run() {
								doResult(result);
							}
						});
					}
				} catch (Exception e) {
					e.printStackTrace();
				}
			}
		}).start();

AsyncHttp

// 创建 访问端
		AsyncHttpClient client = new AsyncHttpClient();

		// 接口地址
		String url = "http://192.168.1.101:8080/ChatServer/register";

		//
		RequestParams params = new RequestParams();
		params.put("account", account);
		params.put("password", password);

		// 调用post方法访问网络
		client.post(context, url, params, new TextHttpResponseHandler() {

			@Override
			public void onSuccess(int statusCode, Header[] headers,
					String responseString) {
				Log.d("success", responseString + "");

				JsonParser parser = new JsonParser();
				JsonElement element = parser.parse(responseString);
				JsonObject root = element.getAsJsonObject();

				JsonPrimitive flagJson = root.getAsJsonPrimitive("flag");
				boolean flag = flagJson.getAsBoolean();

				if (flag) {
					JsonObject dataObject = root.getAsJsonObject("data");
					if (dataObject != null) {
						Account user = new Gson().fromJson(dataObject,
								Account.class);

						Log.d("", user.toString());
					}
				} else {
					JsonPrimitive errorCodeJson = root
							.getAsJsonPrimitive("errorCode");
					JsonPrimitive errorStringJson = root
							.getAsJsonPrimitive("errorString");

					Log.d("", errorCodeJson.getAsInt() + " : "
							+ errorStringJson.getAsString());
				}
			}

			@Override
			public void onFailure(int statusCode, Header[] headers,
					String responseString, Throwable throwable) {
				Log.d("error", responseString + " : " + throwable.getMessage());
			}
		});

由于不需要每个页面访问网络都去写这一段代码，抽取：

回调接口：

public abstract class ObjectCallback<T> {

	private final Class<T> clazz;

	@SuppressWarnings("unchecked")
	public ObjectCallback() {
		ParameterizedType type = (ParameterizedType) this.getClass()
				.getGenericSuperclass();
		clazz = (Class<T>) type.getActualTypeArguments()[0];//获取泛型
	}

	public Class<T> getDataClass() {
		return clazz;
	}

	public abstract void onSuccess(T data);

	public abstract void onFailure(int errorCode, String errorString);
}

HMChatManager 

public class HMChatManager {

	private static HMChatManager instance;
	private Context context;

	public static HMChatManager getInstance(Context context) {
		if (instance == null) {
			synchronized (HMChatManager.class) {
				if (instance == null) {
					instance = new HMChatManager(context);
				}
			}
		}
		return instance;
	}

	private HMChatManager(Context context) {
		this.context = context;
	}

	@SuppressWarnings("rawtypes")
	public HttpFuture sendRequest(String url, final ObjectCallback callback) {
		return sendRequest(url, null, callback);
	}

	@SuppressWarnings("rawtypes")
	public HttpFuture sendRequest(String url, Map<String, String> headers,
			Map<String, String> paramters, final ObjectCallback callback) {
		// 创建 访问端
		AsyncHttpClient client = new AsyncHttpClient();

		// 请求消息头
		if (headers != null) {
			for (Map.Entry<String, String> me : headers.entrySet()) {
				client.addHeader(me.getKey(), me.getValue());
			}
		}

		// 请求参数
		RequestParams params = new RequestParams();
		// params.put("account", account);
		// params.put("password", password);

		if (paramters != null) {
			for (Map.Entry<String, String> me : paramters.entrySet()) {
				params.put(me.getKey(), me.getValue());
			}
		}

		// 调用post方法访问网络
		RequestHandle handle = client.post(context, url, params,
				new TextHttpResponseHandler() {

					@SuppressWarnings("unchecked")
					@Override
					public void onSuccess(int statusCode, Header[] headers,
							String responseString) {
						Log.d("success", responseString + "");

						JsonParser parser = new JsonParser();
						JsonElement element = parser.parse(responseString);
						JsonObject root = element.getAsJsonObject();

						JsonPrimitive flagJson = root
								.getAsJsonPrimitive("flag");
						boolean flag = flagJson.getAsBoolean();

						if (flag) {
							JsonObject dataObject = root
									.getAsJsonObject("data");
							if (dataObject != null) {
								if (callback != null) {
									@SuppressWarnings("unchecked")
									Object obj = new Gson().fromJson(
											dataObject, callback.getDataClass());
									callback.onSuccess(obj);
								}
							}
						} else {
							JsonPrimitive errorCodeJson = root
									.getAsJsonPrimitive("errorCode");
							JsonPrimitive errorStringJson = root
									.getAsJsonPrimitive("errorString");

							Log.d("", errorCodeJson.getAsInt() + " : "
									+ errorStringJson.getAsString());

							if (callback != null) {
								callback.onFailure(errorCodeJson.getAsInt(),
										errorStringJson.getAsString());
							}
						}
					}

					@Override
					public void onFailure(int statusCode, Header[] headers,
							String responseString, Throwable throwable) {
						Log.d("error",
								responseString + " : " + throwable.getMessage());

						if (callback != null) {
							callback.onFailure(HMError.ERROR_SERVER, "服务器连接问题");
						}

					}
				});

		return new HttpFuture(handle);
	}

访问的的时候

String url = "http://192.168.1.101:8080/ChatServer/register";
		Map<String, String> paramters = new HashMap<String, String>();
		paramters.put("account", account);
		paramters.put("password", password);

		future = HMChatManager.getInstance(getActivity()).sendRequest(url,
				paramters, new ObjectCallback<Account>() {

					@Override
					public void onSuccess(Account data) {

						Log.d("onSuccess", data.toString());

						// 数据的存储
						AccountDao dao = new AccountDao(getActivity());
						data.setCurrent(true);

						Account localAccount = dao.getByAccount(data
								.getAccount());
						if (localAccount != null) {
							dao.updateAccount(data);
						} else {
							dao.addAccount(data);
						}

						// 页面跳转
						((LoginActivity) getActivity()).go2FillInfo();
					}

					@Override
					public void onFailure(int errorCode, String errorString) {
						Log.d("onFailure", errorCode + " : " + errorString);

						switch (errorCode) {
						case HMError.ERROR_CLIENT_NET:
							Log.d(TAG, "客户端网络异常");
							ToastUtil.show(getActivity(), "客户端网络异常");
							break;
						case HMError.ERROR_SERVER:
							Log.d(TAG, "服务器异常");
							ToastUtil.show(getActivity(), "服务器异常");
							break;
						case HMError.Register.ACCOUNT_EXIST:
							Log.d(TAG, "用户已经存在");
							ToastUtil.show(getActivity(), "用户已经存在");
							break;
						default:
							break;
						}
					}
				});

 

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