/**
 * 开启新线程用于登录
 * 并对服务器返回数据进行判断
 * 以及对存储登录信息进行判断
 * error == 0 时服务器判定登录成功
 * 则进行对返回数据的存储以便后面调用
 * 如果存储失败则需要重新登录
 * error == 1 时服务器判定登录失败
 * 需要重新登录
 */
public void Login() {
    mButton.setClickable(false);
    mButton.setText("Loading...");
    final String username = mUserName.getText().toString().trim();
    final String password = mPassWord.getText().toString().trim();

    new Thread() {
        public void run() {
            final String result = NetUtil.loginByGet(username, password);
            if (result != null) {
                try {
                    JSONTokener jsonTokener = new JSONTokener(result);
                    JSONObject jsonObject = (JSONObject) jsonTokener.nextValue();
                    final String message = jsonObject.getString("message");
                    if (jsonObject.getInt("error") == 0) {
                        String token = jsonObject.getString("token");
                        boolean isSaveSuccess = InfoUtil.saveUserInfo(LoginActivity.this,token);
                        if (isSaveSuccess) {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(LoginActivity.this, "登录成功", Toast.LENGTH_SHORT).show();
                                    initIntent(MainActivity.class);
                                    finish();
                                }
                            });
                        }else {
                            runOnUiThread(new Runnable() {
                                @Override
                                public void run() {
                                    Toast.makeText(LoginActivity.this, "保存登录信息失败", Toast.LENGTH_SHORT).show();
                                    mButton.setClickable(true);
                                    mButton.setText("登录");
                                }
                            });
                        }
                    } else if(jsonObject.getInt("error") == 1) {
                        runOnUiThread(new Runnable() {
                            @Override
                            public void run() {
                                Toast.makeText(LoginActivity.this, "" + message,
                                        Toast.LENGTH_SHORT).show();
                                mButton.setClickable(true);
                                mButton.setText("登录");
                            }
                        });
                    }
                }catch (Exception e) {
                    e.printStackTrace();
                }
            } else {
                runOnUiThread(new Runnable() {
                    @Override
                    public void run() {
                        Toast.makeText(LoginActivity.this, "请求失败", Toast.LENGTH_SHORT).show();
                        mButton.setClickable(true);
                        mButton.setText("登录");
                    }
                });
            }
        }
    }.start();
}