Gears Android WIFI/基站定位源代码分析

核心提示：NULL, // required_cookietrue, // disable_browser_cookiespost_body_.get(),&payload,&payload_data,NULL, // was_redirectedNULL, // full_redirect_urlNULL); // error

NULL, // required_cookie

true, // disable_browser_cookies

post_body_.get(),

&payload,

&payload_data,

NULL, // was_redirected

NULL, // full_redirect_url

NULL); // error_message

MutexLock lock(&is_processing_response_mutex_);

// is_aborted_ may be true even if HttpPost succeeded.

if (is_aborted_) {

LOG(("NetworkLocationRequest::Run() : HttpPost request was cancelled. "));

return;

}

if (listener_) {

Position position;

std::string response_body;

if (result) {

// If HttpPost succeeded, payload_data is guaranteed to be non-NULL.

assert(payload_data.get());

if (!payload_data->Length() ||

!BlobToString(payload_data.get(), &response_body)) {

LOG(("NetworkLocationRequest::Run() : Failed to get response body. "));

}

}

解析出位置信息

std::string16 access_token;

GetLocationFromResponse(result, payload.status_code, response_body,

timestamp_, url_, is_reverse_geocode_,

&position, &access_token);

通知位置信息的监听者。

bool server_error =

!result || (payload.status_code >= 500 && payload.status_code < 600);

listener_->LocationResponseAvailable(position, server_error, access_token);

}

}

有人会问，请求是发哪个服务器的?当然是google了，缺省的URL是：

static const char16 *kDefaultLocationProviderUrl =

STRING16(L"https://www.google.com/loc/json");

回过头来，我们再总结一下：

1.WIFI和基站定位过程如下：

2.NetworkLocationProvider和NetworkLocationRequest各有一个线程来异步处理请求。

3.这里的NetworkLocationProvider与android中的NetworkLocationProvider并不是同一个东西，这里是给gears用的，要在android的google