android开发实现微信三方登录

怼烎@ 2022-07-29 10:41 217阅读 0赞

需要了解的知识：OATH2的简单机制。http://www.ruanyifeng.com/blog/2014/05/oauth\_2\_0.html这篇文章写得很清晰（谢谢作者）。

基本流程（从微信官方文档截图）：（说的很详细）

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![Image 1][]

自己理解：首先使用appId在手机客户端向微信开放平台发起请求---->返回code零时票据，让后客户端请求自己的服务器端（code作为参数）---->服务器使用code加上app ID河appSecret(不能放在客户端，容易泄露)向微信开放平台发起请求---->返回access\_token。然后服务器端就可以根据access\_token获取到授权用户的一些信息。

下面是我的代码实现：

第一部分：（客户端）

第一个页面：

/\*\*

\* 发起请求的页面，只有一个按钮

\* @author ylh

\*/

public class YlhActivity extends Activity \{

String APP\_ID = "＊＊＊＊＊＊";//改成你自己的APP\_ID

private IWXAPI api;

private Button btn\_sanfangLogin\_activity\_main;

publicstatic String uuid = null;

@Override

protected void onCreate(Bundle savedInstanceState) \{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity\_main);

btn\_sanfangLogin\_activity\_main = (Button) findViewById(R.id.btn\_sanfangLogin\_activity\_main);

api = WXAPIFactory.createWXAPI(this, APP\_ID);

api.registerApp(APP\_ID);

btn\_sanfangLogin\_activity\_main

.setOnClickListener(new OnClickListener() \{

@Override

public  void onClick(View v) \{

if (!api.isWXAppInstalled()) \{

Toast.makeText(YlhActivity.this, "未安装微信客户端，请先下载",

Toast.LENGTH\_LONG).show();

return;

uuid = UUID.randomUUID().toString();

final SendAuth.Req req = new SendAuth.Req();

req.scope = "snsapi\_userinfo";

req.state = uuid;

System.out.println("state: " \+ uuid);

boolean b = api.sendReq(req);

System.out.println(b);

\});

第二个页面：

/\*\*

\* 授权后，微信客户端调用的页面（ android:exported="true"）

\* @author ylh

\*/

public class WXEntryActivity extends Activity implements IWXAPIEventHandler \{

String APP\_ID = "＊＊＊＊＊";//改成你自己的APP\_ID

private IWXAPI api;

@Override

protected void onCreate(Bundle savedInstanceState) \{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity\_main);

api = WXAPIFactory.createWXAPI(this, APP\_ID);

api.registerApp(APP\_ID);

api.handleIntent(getIntent(), this);

@Override

public  void onReq(BaseReq arg0) \{

System.out.println("onRep");

@Override

public  void onResp(BaseResp resp) \{

System.out.println("onResp");

switch (resp.errCode) \{

case BaseResp.ErrCode.ERR\_OK:

System.out.println("成功");

SendAuth.Resp response = (SendAuth.Resp) resp;

System.out.println(response.state);

if (response.state == null

|| !response.state.equals(YlhActivity.uuid))

return;// 判断请求是否是我的应用的请求

System.out.println(response.code);

System.out.println(response.country);

break;

case BaseResp.ErrCode.ERR\_USER\_CANCEL:

System.out.println("quxiao");

break;

case BaseResp.ErrCode.ERR\_AUTH\_DENIED:

System.out.println("jujue");

break;

default:

break;

第二部分：（服务器端，使用httpClient向微信开放平台发起请求，使用json-lib-2.4-jdk15.jar解析返回的结果）

/\*\*

\* 发起get请求的方法

\* @param urlAddress

\* @return

\*/

public static String doGet(String urlAddress) \{

String getUrl = urlAddress;

HttpGet httpGet = new HttpGet(getUrl);

HttpParams hp = httpGet.getParams();

hp.getParameter("true");

//  hp.

// httpGet.setp

HttpClient hc = HttpClients.createDefault();

try \{

HttpResponse ht = hc.execute(httpGet);

if (ht.getStatusLine().getStatusCode() == HttpStatus.SC\_OK) \{

HttpEntity he = ht.getEntity();

InputStream is = he.getContent();

BufferedReader br = new BufferedReader(new InputStreamReader(is));

String response = "";

String readLine = null;

while ((readLine = br.readLine()) !=  null) \{

// response = br.readLine();

response = response \+ readLine;

is.close();

br.close();

// String str = EntityUtils.toString(he);

System.out.println(response);

returnresponse;

\} else \{

return"error";

\} catch (ClientProtocolException e) \{

//  TODO Auto-generated catch block

e.printStackTrace();

return"exception";

\} catch (IOException e) \{

//  TODO Auto-generated catch block

e.printStackTrace();

return"exception";

下面就调用：

1. 使用客户端传来的code，加上app ID河appSecret(不能放在客户端，容易泄露)向微信开放平台发起请求

doGet("https://api.weixin.qq.com/sns/oauth2/access\_token?grant\_type=authorization\_code&appid=\*\*\*\*\*\*\*\*\*\*\*&secret=\*\*\*\*\*\*\*\*\*\*\*&code=\*\*\*\*\*\*\*\*\*\*\*");（\*\*\*\*\*\*\*\*\*\*\*的地方替换相应的参数）返回access\_token和openid

2. 使用上一步获得的 access\_token和openid 向微信开放平台发起请求，获得用户信息

String resp = doGet("https://api.weixin.qq.com/sns/userinfo?access\_token=\*\*\*\*\*\*\*\*\*\*&openid=\*\*\*\*\*\*\*\*\*\*\*");

JSONObject jObject = JSONObject.fromObject(resp);

String openid = jObject.get("openid").toString();

String nickname = jObject.get("nickname").toString();

String sex = jObject.get("sex").toString();

String language = jObject.get("language").toString();

String city = jObject.get("city").toString();

String province = jObject.get("province").toString();

String country = jObject.get("country").toString();

String headimgurl = jObject.get("headimgurl").toString();

String privilege = jObject.get("privilege").toString();

String unionid = jObject.get("unionid").toString();

System.out.println(openid);

System.out.println(nickname);

System.out.println(sex);

System.out.println(language);

System.out.println(city);

System.out.println(province);

System.out.println(country);

System.out.println(headimgurl);

System.out.println(privilege);

System.out.println(unionid);

注： JSONObject使用的是json-lib-2.4-jdk15.jar解析，依赖的jar包有

commons\-beanuitls\-1.7.0.jar、commons\-collections\-3.2.jar、commons\-lang\-2.4.jar、commons\-logging\-1.2.jar、ezmorph\-1.0.4.jar、json\-lib\-2.4\-jdk15.jar

[Center]: /images/20220728/39dd76724b8e4d3cbe495e771cd937d7.png
[Image 1]: