微信官方文档api:https://developers.weixin.qq.com/doc/oplatform/mobile_app/wechat_login/development_guide.html
1.申请你的 appid
只有审核通过的应用才能进行开发。
2.下载 sdk 及 api 文档
android studio 环境下：
在 build.gradle 文件中，添加如下依赖即可：
dependencies {
implementation ‘com.tencent.mm.opensdk:wechat-sdk-android:6.8.0'
}
3.将app注册到微信
iwxapi msgapi = wxapifactory.createwxapi(loginactivity.this, constant.appid, true);
if (msgapi.iswxappinstalled()) {
// 将应用的appid注册到微信
msgapi.registerapp(constant.appid);
//建议动态监听微信启动广播进行注册到微信
registerreceiver(new broadcastreceiver() {
@override
public void onreceive(context context, intent intent) {
// 将该app注册到微信
msgapi.registerapp(constant.appid);
}
}, new intentfilter(constantsapi.action_refresh_wxapp));
final req req = new req();
req.scope = "snsapi_userinfo"; //获取用户个人信息则填写 snsapi_userinfo
req.state = "mvwl-"; //可根据项目填写
msgapi.sendreq(req);
} else {
toast.maketext(loginactivity.this, "请安装微信客户端后进行此操作").show();
return;
}
4.创建wxentryactivity，在androidmainifest.xml中添加wxentryactivity
public class wxentryactivity extends wxcallbackactivity implements iwxapieventhandler {
public static final string wxlogin_action = "com.mvw.test.wxlogin";
private iwxapi iwxapi;
@override
protected void oncreate(bundle savedinstancestate) {
super.oncreate(savedinstancestate);
iwxapi = wxapifactory.createwxapi(this, "自己项目appid", true);
try {
intent intent = getintent();
iwxapi.handleintent(intent, this);
} catch (exception e) {
e.printstacktrace();
}
}
@override
protected void onnewintent(intent intent) {
super.onnewintent(intent);
setintent(intent);
iwxapi.handleintent(intent, this);
}
// 微信发送请求到第三方应用时，会回调到该方法
@override
public void onreq(basereq basereq) {
switch (basereq.gettype()) {
case constantsapi.command_getmessage_from_wx:
break;
case constantsapi.command_showmessage_from_wx:
break;
default:
break;
}
}
@override
public void onresp(baseresp baseresp) {
intent intent = new intent(wxlogin_action);
//登录回调
log.i("微信", "onresp: "+ baseresp.errcode);
switch (baseresp.errcode){
case baseresp.errcode.err_ok:
string code = ((sendauth.resp) baseresp).code;
intent.putextra("wx_login", code);
intent.putextra("error_code", 0);
break;
//用户拒绝授权
case baseresp.errcode.err_auth_denied:
intent.putextra("error_code", -4);
break;
//用户取消授权
case baseresp.errcode.err_user_cancel:
intent.putextra("error_code", -2);
break;
}
sendbroadcast(intent); //使用了广播
finish();
}
}
<activity
android:configchanges="keyboardhidden|orientation|screensize"
android:exported="true"
android:name=".wxapi.wxentryactivity"
android:theme="@android:style/theme.translucent.notitlebar" />
5.接收微信返回参数code,根据code获取access_token,获取用户个人信息
下面是完整的使用列子。
package com.mvw.test.activity;
import android.annotation.suppresslint;
import android.app.activity;
import android.app.alertdialog;
import android.content.broadcastreceiver;
import android.content.context;
import android.content.intent;
import android.content.intentfilter;
import android.graphics.drawable.colordrawable;
import android.net.uri;
import android.os.bundle;
import android.support.annotation.nullable;
import android.text.html;
import android.text.textutils;
import android.util.log;
import android.view.gravity;
import android.view.view;
import android.widget.checkbox;
import android.widget.compoundbutton;
import android.widget.compoundbutton.oncheckedchangelistener;
import android.widget.edittext;
import android.widget.imageview;
import android.widget.textview;
import android.widget.toast;
import com.google.gson.gson;test
import com.google.gson.gsonbuilder;
import com.mvw.test.r;
import com.mvw.test.wxapi.wxentryactivity;
import com.test.netlibrary.okhttputils;
import com.test.netlibrary.callback.stringcallback;
import com.orhanobut.logger.logger;
import com.tencent.mm.opensdk.constants.constantsapi;
import com.tencent.mm.opensdk.modelmsg.sendauth.req;
import com.tencent.mm.opensdk.openapi.iwxapi;
import com.tencent.mm.opensdk.openapi.wxapifactory;
import com.umeng.socialize.platformconfig;
import java.util.hashmap;
import java.util.map;
import okhttp3.call;
import okhttp3.mediatype;
import org.json.jsonexception;
import org.json.jsonobject;
/**
* 登录
*/
public class loginactivity extends activity implements view.onclicklistener {
private string weixin_access_token_key = "wx_access_token_key"; //微信access_token
private string weixin_openid_key = "wx_openid_key"; //微信openid
private string weixin_refresh_token_key = "wx_refresh_token_key";//微信refresh_token
private string weixin_unionid = "wx_unionid_key";//微信unionid
private activity activity;
private iwxapi msgapi;
private wxloginreceiver wxloginreceiver;
private boolean flag=false;
@override
protected void oncreate(@nullable bundle savedinstancestate) {
super.oncreate(savedinstancestate);
setcontentview(r.layout.activity_login);
activity = this;
initview();
}
private void initview() {
imageview iv_wechat = (imageview) findviewbyid(r.id.iv_wechat);
iv_wechat.setonclicklistener(this);
}
@override
public void onclick(view v) {
switch (v.getid()) {
case r.id.iv_wechat:
registerwechat();
break;
}
}
//注册广播
@override
protected void onresume() {
super.onresume();
flag = true;
if (wxloginreceiver == null) {
intentfilter wxintent = new intentfilter(wxentryactivity.wxlogin_action);
wxloginreceiver = new wxloginreceiver();
registerreceiver(wxloginreceiver, wxintent);
}
}
/**
* 微信登录成功接收广播
* shareutilservice 封装的sharedpreferences存储方法
*/
class wxloginreceiver extends broadcastreceiver {
@override
public void onreceive(context context, intent intent) {
string code = intent.getstringextra("wx_login");
int error_code = intent.getintextra("error_code", -1);
if (textutils.equals(intent.getaction(), wxentryactivity.wxlogin_action)) {
switch (error_code) {
case 0:
if (!code.isempty()) {
string accesstoken = shareutilservice.getstring(weixin_access_token_key, "");
string openid = shareutilservice.getstring(weixin_openid_key, "");
if (!"".equals(accesstoken)) {
// 有access_token，判断是否过期有效
isexpireaccesstoken(accesstoken, openid);
} else {
// 没有access_token
getaccesstoken(code);
}
}
break;
case -4: //用户拒绝授权
case -2: //用户取消授权
log.i("微信", "onreceive: " + error_code);
break;
}
}
}
}
/**
* 微信授权登录,请求 code
*/
private void registerwechat() {
shareutilservice.remove(weixin_refresh_token_key);
shareutilservice.remove(weixin_access_token_key);
shareutilservice.remove(weixin_openid_key);
shareutilservice.remove(weixin_unionid);
msgapi = wxapifactory.createwxapi(loginactivity.this, constant.appid, true);
log.i("微信", "registerwechat: " + msgapi.iswxappinstalled());
if (msgapi.iswxappinstalled()) {
// 将应用的appid注册到微信
msgapi.registerapp(constant.appid);
//建议动态监听微信启动广播进行注册到微信
registerreceiver(new broadcastreceiver() {
@override
public void onreceive(context context, intent intent) {
// 将该app注册到微信
msgapi.registerapp("自己项目appid");
}
}, new intentfilter(constantsapi.action_refresh_wxapp));
final req req = new req();
req.scope = "snsapi_userinfo";
req.state = "mvwl-";//根据自己项目需要定义
msgapi.sendreq(req);
} else {
toast.maketext(loginactivity.this, r.string.pay_wx_client_install,
toast.length_short).show();
return;
}
}
/**
* 微信获取accesstoken
* @param code 微信返回的code
*/
private void getaccesstoken(string code) {
map<string, string> map = new hashmap<>();
map.put("appid", "自己项目appid");
map.put("secret", "自己项目appsecret");
map.put("code", code);
map.put("grant_type", "authorization_code");
okhttputils.get().url("https://api.weixin.qq.com/sns/oauth2/access_token?").params(map).build().execute(
new stringcallback() {
@override
public void onerror(call call, exception e, int id) {
log.i("微信获取err", e.getmessage());
}
@override
public void onresponse(string response, int id) {
string access = null;
string openid = null;
try {
jsonobject jsonobject = new jsonobject(response);
access = jsonobject.getstring("access_token");
openid = jsonobject.getstring("openid");
string refresh = jsonobject.getstring("refresh_token");
shareutilservice.setstring(weixin_access_token_key, access);
shareutilservice.setstring(weixin_openid_key, openid);
shareutilservice.setstring(weixin_refresh_token_key, refresh);
getwechatuserinfo(access, openid);
} catch (jsonexception e) {
e.printstacktrace();
}
}
});
}
/**
* 获取用户信息
* @param accesstoken 接口调用凭证
* @param openid 授权用户唯一标识
*/
private void getwechatuserinfo(string accesstoken, string openid) {
map<string, string> map = new hashmap<>();
map.put("access_token", accesstoken);
map.put("openid", openid);
okhttputils.get().url("https://api.weixin.qq.com/sns/userinfo?").params(map).build().execute(
new stringcallback() {
@override
public void onerror(call call, exception e, int id) {
log.i("微信用户信息err", e.getmessage());
}
@override
public void onresponse(string response, int id) {
try {
jsonobject jsonobject = new jsonobject(response);
shareutilservice.setstring("userinfo", response);
string unionid = jsonobject.getstring("unionid");
shareutilservice.setstring(weixin_unionid,unionid);
} catch (jsonexception e) {
e.printstacktrace();
}
}
});
}
/**
* 判断accesstoken是过期
*
* @param accesstoken token
* @param openid 授权用户唯一标识
*/
private void isexpireaccesstoken(final string accesstoken, final string openid) {
map<string, string> map = new hashmap<>();
map.put("access_token", accesstoken);
map.put("openid", openid);
okhttputils.get().url("https://api.weixin.qq.com/sns/auth?").params(map).build().execute(
new stringcallback() {
@override
public void onerror(call call, exception e, int id) {
log.i("微信token过期err", e.getmessage());
}
@override
public void onresponse(string response, int id) {
try {
jsonobject jsonobject = new jsonobject(response);
int errcode = jsonobject.getint("errcode");
if (errcode == 0) {
getwechatuserinfo(accesstoken, openid);
} else {
// 过期了，使用refresh_token来刷新accesstoken
refreshaccesstoken();
}
} catch (jsonexception e) {
e.printstacktrace();
}
}
});
}
/**
* 刷新获取新的access_token
*/
private void refreshaccesstoken() {
// 从本地获取以存储的refresh_token
string refreshtoken = shareutilservice.getstring(weixin_refresh_token_key, "");
if (textutils.isempty(refreshtoken)) {
return;
}
map<string, string> map = new hashmap<>();
map.put("appid", "自己项目的appid“);
map.put("grant_type", "refresh_token");
map.put("refresh_token", refreshtoken);
okhttputils.get().url("https://api.weixin.qq.com/sns/oauth2/refresh_token?").params(map).build().execute(
new stringcallback() {
@override
public void onerror(call call, exception e, int id) {
log.i("微信刷新tokenerror", e.getmessage());
// 重新请求授权
registerwechat();
}
@override
public void onresponse(string response, int id) {
try {
jsonobject jsonobject = new jsonobject(response);
string access = jsonobject.getstring("access_token");
string openid = jsonobject.getstring("openid");
getwechatuserinfo(access, openid);
} catch (jsonexception e) {
e.printstacktrace();
}
}
});
}
@override
protected void ondestroy() {
super.ondestroy();
if(flag){
flag=false;
if (wxloginreceiver != null) {
unregisterreceiver(wxloginreceiver);
}
}
}
}
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