安卓微信第三方登陆

在微信开放平台注册应用后拿到APPID与Appsecret
官方地址：https://open.weixin.qq.com

1、添加依赖

{  api 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'}

2、添加权限

3、将应用程序注册到微信

public class Application extends android.app.Application {    private IWXAPI api;    @Override    public void onCreate() {        super.onCreate();        api = WXAPIFactory.createWXAPI(this, Constant.WX_APPID, false);        api.registerApp(Constant.WX_APPID);    }}

4、请求code

    private void getWeChatCode() {        if (api == null) {            api = WXAPIFactory.createWXAPI(this, Constant.WX_APPID, false);        }        if (!api.isWXAppInstalled()) {            Toast.makeText(MainActivity.this, "请先安装微信客户端", Toast.LENGTH_SHORT).show();        } else {            SendAuth.Req req = new SendAuth.Req();            req.scope = "snsapi_userinfo";            req.state = "wechat_test_state";            api.sendReq(req);        }    }

5、创建wxapi包并在包下创建WXEntryActivity类实现IWXAPIEventHandler接口

public class WXEntryActivity extends AppCompatActivity implements IWXAPIEventHandler {    private IWXAPI api;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        api = WXAPIFactory.createWXAPI(this, Constant.WX_APPID, false);        api.handleIntent(getIntent(), this);    }    @Override    public void onReq(BaseReq baseReq) {    }    @Override    public void onResp(BaseResp baseResp) {        switch (baseResp.errCode) {            //成功            case BaseResp.ErrCode.ERR_OK:                String code = ((SendAuth.Resp) baseResp).code;                //通过code获取access_token                getAccessToken(code);                finish();                break;            //取消            case BaseResp.ErrCode.ERR_USER_CANCEL:                finish();                break;            //拒绝授权            case BaseResp.ErrCode.ERR_AUTH_DENIED:                finish();                break;            default:                finish();                break;        }    }    /*    * https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code    * */    private void getAccessToken(String code) {        //拼接网络Url        StringBuffer loginUrl = new StringBuffer();        loginUrl.append("https://api.weixin.qq.com/sns/oauth2/access_token")                .append("?appid=")                .append(Constant.WX_APPID)//AppId                .append("&secret=")                .append(Constant.WX_APPSecret)//AppSecret                .append("&code=")                .append(code)                .append("&grant_type=authorization_code");        //网络请求成功之后返回数据        String jsonData = response.body().string();        try {            JSONObject jsonObject = new JSONObject(jsonData);            String access_token = jsonObject.getString("access_token");            String openId = jsonObject.getString("openid");            //获取用户个人信息            getUserInfo(access_token, openId);        } catch (JSONException e) {            e.printStackTrace();        }    }            /*    * https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID    * */    //获取用户个人信息    private void getUserInfo(String access_token, String openid) {        String getUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + access + "&openid=" + openid;                //网络请求成功之后返回数据        String userData = response.body().string();        //将数据存储到本地        SpUtils.putString(WXEntryActivity.this,Constant.USER_INFO,userData);    }}

6、AndroidManifest添加

7、从本地读取用户信息

   @Override    protected void onResume() {        super.onResume();        //从本地数据获取用户信息        String userInfo = SpUtils.getString(MainActivity.this, Constant.USER_INFO, "");        if (!TextUtils.isEmpty(userInfo)) {            try {                JSONObject jsonObject = new JSONObject(userInfo);                String nickname = jsonObject.getString("nickname");                String sex = jsonObject.getString("sex");                String province = jsonObject.getString("province");                String city = jsonObject.getString("city");                String country = jsonObject.getString("country");                String headimgurl = jsonObject.getString("headimgurl");                String privilege = jsonObject.getString("privilege");                String unionid = jsonObject.getString("unionid");            } catch (JSONException e) {                e.printStackTrace();            }        }    }

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