6.后台任务封装

后台任务封装：在没有网络的时候也可以修改用户名、头像等操作

	private void doOk() {
		String text = etName.getText().toString().trim();
		if (TextUtils.isEmpty(text)) {
			ToastUtil.show(getActivity(), "名字不能为空");
			return;
		}
		// 数据更新
		account.setName(text);
		dao.updateAccount(account);
		String url = "http://192.168.1.101:8080/ChatServer/user/name";
		Map<String, String> headers = new HashMap<String, String>();
		headers.put("account", account.getAccount());
		headers.put("token", account.getToken());
		Map<String, String> parameters = new HashMap<String, String>();
		parameters.put("name", text);
		// 1. 将请求加入到后台任务
		// 1) 封装
		NetTask request = new NetTask();
		request.setUrl(url);
		request.setMethod(0);
		request.setHeaders(headers);
		request.setParameters(parameters);
		// 2) 序列化
		String outPath = DirUtil.getTaskDir(getActivity()) + "/"
				+ System.currentTimeMillis();
		try {
			SerializableUtil.write(request, outPath);
		} catch (Exception e) {
			e.printStackTrace();
		}
		// 3) 存储到数据库记录
		BackTask task = new BackTask();
		task.setOwner(account.getAccount());
		task.setPath(outPath);
		task.setState(0);
		new BackTaskDao(getActivity()).addTask(task);
		// 开启服务
		getActivity().startService(
				new Intent(getActivity(), BackgroundService.class));
		// 2. 页面跳转
		Intent intent = new Intent(getActivity(), HomeActivity.class);
		startActivity(intent);
		getActivity().finish();
	}