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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