Android进阶之微信扫码登录

遇到新需求要搭建微信扫码登录功能,这篇文章是随着我的编码过程一并写的,希望能够帮助有需求的人和以后再次用到此功能的自己。

首先想到的就是百度各种文章,当然去开发者平台申请AppID和密钥是必不可少的,等注册好发现需要创建应用以及审核(要官网,流程图及其他信息),想着先写一个Demo开发着,还不需要这么麻烦,

通过一篇文章发现微信还有测试账号 -> 微信扫码登录详细操作流程（微信公众平台开发）
那不正中我心怀,根据现有的比较清晰的文章写出了逻辑 -> Android安卓开发集成微信第三方扫描二维码登录-超级无敌具详细

将我申请的测试 AppID 和密钥 投进去之后，在回调的时候一直走不到 onAuthGotQrcode 方法里面去,看 oauth.auth() 获取二维码方法返回的也是 True,每次都直接走到 onAuthFinish 方法里面,这不扯呢,AppID 和 密钥都是申请好的,代码逻辑也是参考了多篇文章,理论上也没啥问题，而且获取方法也返回的 True，但是每次确报以下错误 ->
E/MicroMsg.SDK.GetQRCodeResult: resp errcode = -21
E/MicroMsg.SDK.GetQRCodeTask: onPostExecute, get qrcode fail, OAuthErrCode = OAuthErrCode:-1

遇到问题就解决呗，去文档上找错误码 -21 -1 啥的没找到,mmp,去百度此类错误，发现遇到的人不少，给出解决方案的都没有，但是有一篇文章的错误和我的差不多，也给了解决办法 ->
android 获取微信二维码 DiffDevOAuth.auth

果然没有解决,文档里还有说字段大小写字母错误的，参数名字错误的，这些我都检查过了， 但是通过错误可以看出来就是获取二维码失败了吧，失败的原因有很多，可能我们不是同一个问题导致的

在网上地毯式搜索之后发现了一个可以解释过去的问题 微信还分公众平台和开放平台，公众平台是以小程序为业务线的，我一瞅我这测试账号不就是从 公众平台申请的吗,难不成是这个问题,早晚都得申请应用，那就先申请了吧，这里要注意下，申请的话需要公司信息(可能还要往公司账户打一笔费用验证),正经官网,APP流程图,要提前做好准备,那就等到几天时间，等正经id和密钥出来再说吧，

过了差不多三四天，应用审核通过了，但是要申请开通微信登录，需要进行开发者资质认证，审核费用三百块，还要填写企业各种信息，营业执照，信用代码啥的

生成密钥还需要绑定了管理员银行卡的微信扫码验证

差不多经历了四五天，终于拿到了AppID 和密码，也开通了微信登录权限， 激动人心的时刻到了，我把正经的数据塞到那套逻辑里，二维码正常显示出来了！获取用户数据也是正常的！

总结：
微信公众平台申请的测试 AppID 和密钥 不能用于微信开放平台的操作，比如APP扫码登录，支付等

接下来我将我的源码贴出来(本人以下代码正常运行,如有需要只需替换 appID、appsecret即可，其他逻辑亲测可用)，尽量写了详细的注释，或者通过上面我贴的链接也可以的

导入依赖比不可少

    implementation 'com.squareup.okhttp3:okhttp:3.12.0'implementation 'com.google.code.gson:gson:2.8.9'//微信登录implementation 'com.tencent.mm.opensdk:wechat-sdk-android:+'

需要的实体类先建好

GetAccessTokenBean

public class GetAccessTokenBean {String access_token;int expires_in;
}

GetTicketBean

public class GetTicketBean {int errcode;String errmsg;String ticket;int expires_in;
}

UserData

public class UserData {private String access_token;private int expires_in;private String refresh_token;private String openid;private String scope;private String unionid;public void setAccess_token(String access_token) {this.access_token = access_token;}public String getAccess_token() {return access_token;}public void setExpires_in(int expires_in) {this.expires_in = expires_in;}public int getExpires_in() {return expires_in;}public void setRefresh_token(String refresh_token) {this.refresh_token = refresh_token;}public String getRefresh_token() {return refresh_token;}public void setOpenid(String openid) {this.openid = openid;}public String getOpenid() {return openid;}public void setScope(String scope) {this.scope = scope;}public String getScope() {return scope;}public void setUnionid(String unionid) {this.unionid = unionid;}public String getUnionid() {return unionid;}
}

UserInfo

public class UserInfo {private String openid;private String nickname;private int sex;private String language;private String city;private String province;private String country;private String headimgurl;private List<String> privilege;private String unionid;public void setOpenid(String openid) {this.openid = openid;}public String getOpenid() {return openid;}public void setNickname(String nickname) {this.nickname = nickname;}public String getNickname() {return nickname;}public void setSex(int sex) {this.sex = sex;}public int getSex() {return sex;}public void setLanguage(String language) {this.language = language;}public String getLanguage() {return language;}public void setCity(String city) {this.city = city;}public String getCity() {return city;}public void setProvince(String province) {this.province = province;}public String getProvince() {return province;}public void setCountry(String country) {this.country = country;}public String getCountry() {return country;}public void setHeadimgurl(String headimgurl) {this.headimgurl = headimgurl;}public String getHeadimgurl() {return headimgurl;}public void setPrivilege(List<String> privilege) {this.privilege = privilege;}public List<String> getPrivilege() {return privilege;}public void setUnionid(String unionid) {this.unionid = unionid;}public String getUnionid() {return unionid;}}

EncryptUtils

public class EncryptUtils {public static String getSHA(String info) {byte[] digesta = null;try {// 得到一个SHA-1的消息摘要MessageDigest alga = MessageDigest.getInstance("SHA-1");// 添加要进行计算摘要的信息alga.update(info.getBytes());// 得到该摘要digesta = alga.digest();} catch (NoSuchAlgorithmException e) {e.printStackTrace();}// 将摘要转为字符串String rs = byte2hex(digesta);return rs;}private static String byte2hex(byte[] b) {String hs = "";String stmp = "";for (byte aB : b) {stmp = (Integer.toHexString(aB & 0XFF));if (stmp.length() == 1) {hs = hs + "0" + stmp;} else {hs = hs + stmp;}}return hs;}
}

获取二维码

public class MainActivity extends AppCompatActivity implements OAuthListener {//图片控件，用于显示二维码private ImageView ivQrCode;//获取微信二维码需要用到的对象IDiffDevOAuth oauth = null;//时间转换格式private final String TIME_FORMAT = "yyyyMMddHHmmss";//开放平台创建应用产生的AppIDprivate final String appID = "xxxxxxxxxxxxxxx";//开放平台创建应用产生的密钥private final String appsecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxx";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);//初始化获取二维码的对象oauth = DiffDevOAuthFactory.getDiffDevOAuth();//获取图片控件对象ivQrCode = findViewById(R.id.iv_qr_code);//开始获取数据(第一步)getAccessToken();}private void getAccessToken() {//第一步请求OkHttpClient client = new OkHttpClient();Request.Builder builder = new Request.Builder();String getAccessToken = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=" + appID + "&secret=" + appsecret;Request request1 = builder.get().url(getAccessToken).build();client.newCall(request1).enqueue(new Callback() {@Overridepublic void onFailure(@NonNull Call call, @NonNull IOException e) {}@Overridepublic void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {ResponseBody mBean = response.body();if (mBean != null){String res = mBean.string();//请求成功时返回的东西GetAccessTokenBean mData = new Gson().fromJson(res,GetAccessTokenBean.class);if (mData.access_token != null && !"".equals(mData.access_token)){//拿到第一步数据，开始第二步getTicket(mData.access_token);}}}});}private void getTicket(String l){//第二步网络请求OkHttpClient client = new OkHttpClient();Request.Builder builder = new Request.Builder();Request request1 = builder.get().url("https://api.weixin.qq.com/cgi-bin/ticket/getticket?access_token=" + l + "&type=2").build();client.newCall(request1).enqueue(new Callback() {@Overridepublic void onFailure(@NonNull Call call, @NonNull IOException e) {}@Overridepublic void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {ResponseBody mBean = response.body();if (mBean != null){//拿到数据进行数据组合String res = mBean.string();//请求成功时返回的东西GetTicketBean mData = new Gson().fromJson(res,GetTicketBean.class);if (mData.ticket != null){StringBuilder str  = new StringBuilder();Random random = new Random();for (int i = 0; i < 8; i++){str.append(random.nextInt(10));}String noncestr = str.toString();String timeStamp = new SimpleDateFormat(TIME_FORMAT).format(new Date());String string1 = java.lang.String.format("appid=%s&noncestr=%s&sdk_ticket=%s&timestamp=%s", appID, noncestr, mData.ticket, timeStamp);String sha = EncryptUtils.getSHA(string1);//开始进行第三步sign(noncestr,timeStamp,sha);}}}});}private void sign(String noncestr,String timeStamp,String sha){if (oauth != null){oauth.removeAllListeners();oauth.stopAuth();oauth.detach();//第四步，获取二维码，获取到的二维码从回调(onAuthGotQrcode)里面显示Boolean s = oauth.auth(appID,"snsapi_userinfo",noncestr,timeStamp,sha,this);}}private void getUserData(String c){//开始第五步OkHttpClient client = new OkHttpClient();Request.Builder builder = new Request.Builder();Request request1 = builder.get().url("https://api.weixin.qq.com/sns/oauth2/access_token?appid="+ appID+"&secret=" + appsecret + "&code=" +c+ "&grant_type=authorization_code").build();client.newCall(request1).enqueue(new Callback() {@Overridepublic void onFailure(@NonNull Call call, @NonNull IOException e) {}@Overridepublic void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {ResponseBody mBean = response.body();if (mBean != null){String res = mBean.string();//请求成功时返回的东西UserData mData = new Gson().fromJson(res,UserData.class);if (mData.getOpenid() != null && !Objects.equals(mData.getOpenid(), "") &&mData.getAccess_token() != null && !Objects.equals(mData.getAccess_token(), "")){//拿到数据，最后一步获取用户信息getUserInfo(mData.getOpenid(),mData.getAccess_token());}}}});}private void getUserInfo(String openID, String aToken){//获取用户信息OkHttpClient client = new OkHttpClient();Request.Builder builder = new Request.Builder();Request request1 = builder.get().url("https://api.weixin.qq.com/sns/userinfo?access_token=" +aToken+"&openid=" + openID).build();client.newCall(request1).enqueue(new Callback() {@Overridepublic void onFailure(@NonNull Call call, @NonNull IOException e) {}@Overridepublic void onResponse(@NonNull Call call, @NonNull Response response) throws IOException {ResponseBody mBean = response.body();if (mBean != null){String res = mBean.string();//请求成功时返回的东西UserInfo mData = new Gson().fromJson(res,UserInfo.class);}}});}@Overridepublic void onAuthGotQrcode(String s, byte[] bytes) {//获取二维码图片。并显示出来，用户扫码二维码之后从回调(onAuthFinish)显示Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);if (ivQrCode != null){ivQrCode.setImageBitmap(bmp);}}@Overridepublic void onQrcodeScanned() {}@Overridepublic void onAuthFinish(OAuthErrCode oAuthErrCode, String s) {//用户授权成功之后可以从这里拿到数据，或者错误信息//获取用户信息 第五步getUserData(s);}
}

activity_main

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"xmlns:app="http://schemas.android.com/apk/res-auto"xmlns:tools="http://schemas.android.com/tools"android:layout_width="match_parent"android:layout_height="match_parent"tools:context=".MainActivity"><ImageViewandroid:id="@+id/iv_qr_code"app:layout_constraintTop_toTopOf="parent"app:layout_constraintBottom_toBottomOf="parent"app:layout_constraintStart_toStartOf="parent"app:layout_constraintEnd_toEndOf="parent"android:layout_width="200px"android:layout_height="200px"/></androidx.constraintlayout.widget.ConstraintLayout>