Android集成微信原生登录

https://blog.csdn.net/u014078990/article/details/83752223

1，app build.gradle:

//微信登录
    api 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'

2，权限：

<uses-permission android:name="android.permission.INTERNET" />

<!-- for mta statistics, not necessary-->
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
<uses-permission android:name="android.permission.READ_PHONE_STATE"/>
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

3，新建 WXEntryActivity.java

清单文件中配置：

<activity
            android:name=".wxapi.WXEntryActivity"
            android:label="@string/app_name"
            android:theme="@android:style/Theme.Translucent.NoTitleBar"
            android:exported="true"
            android:taskAffinity="com.junxin.zeropay"
            android:launchMode="singleTask">
        </activity>

 混淆 proguard-rules.pro：

## - - - - - - - - 微信 - - - - - - - - - - - -
-keep class com.tencent.mm.opensdk.** {
    *;
}

-keep class com.tencent.wxop.** {
    *;
}

-keep class com.tencent.mm.sdk.** {
    *;
}

package com.zz.zeropay.wxapi;

import androidx.appcompat.app.AppCompatActivity;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.util.Log;
import android.view.WindowManager;

import com.zz.zeropay.R;
import com.tencent.mm.opensdk.modelbase.BaseReq;
import com.tencent.mm.opensdk.modelbase.BaseResp;
import com.tencent.mm.opensdk.modelmsg.SendAuth;
import com.tencent.mm.opensdk.openapi.IWXAPI;
import com.tencent.mm.opensdk.openapi.IWXAPIEventHandler;
import com.tencent.mm.opensdk.openapi.WXAPIFactory;

import org.json.JSONObject;

import java.io.IOException;

import okhttp3.Call;
import okhttp3.Callback;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;

public class WXEntryActivity extends Activity implements IWXAPIEventHandler {

    private ProgressDialog mProgressDialog;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_wxentry);
        // 隐藏状态栏
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        //接收到分享以及登录的intent传递handleIntent方法，处理结果
        IWXAPI iwxapi = WXAPIFactory.createWXAPI(this, "wx45ccf89d8a0a24a7", false);
        iwxapi.handleIntent(getIntent(), this);

    }

    @Override
    public void onReq(BaseReq baseReq) {

    }

    //请求回调结果处理
    @Override
    public void onResp(BaseResp baseResp) {
        //登录回调
        switch (baseResp.errCode) {
            case BaseResp.ErrCode.ERR_OK:
                String code = ((SendAuth.Resp) baseResp).code;
                //获取accesstoken
                getAccessToken(code);
                Log.d(TAG, code.toString() + "");
                break;
            case BaseResp.ErrCode.ERR_AUTH_DENIED://用户拒绝授权
                Log.d(TAG, "ERR_AUTH_DENIED");
                break;
            case BaseResp.ErrCode.ERR_USER_CANCEL://用户取消
                Log.d(TAG, "ERR_USER_CANCEL");
                break;
            default:
                //this.finish();
                break;
        }
    }

    private void getAccessToken(String code) {
        Log.d(TAG, "微信 code = " + code);
        createProgressDialog();
        //获取授权
        StringBuffer loginUrl = new StringBuffer();
        loginUrl.append("https://api.weixin.qq.com/sns/oauth2/access_token")
                .append("?appid=")
                .append("wx00bb0933b4fdb159")
                .append("&secret=")
                .append("801cb12459e1d0fdb06df216cf91755b")
                .append("&code=")
                .append(code)
                .append("&grant_type=authorization_code");
        Log.d(TAG, loginUrl.toString());

        OkHttpClient okHttpClient = new OkHttpClient();
        final Request request = new Request.Builder()
                .url(loginUrl.toString())
                .get()//默认就是GET请求，可以不写
                .build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.d(TAG, "onFailure: "+e);
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseInfo= response.body().string();
                Log.d("fan12", "onResponse: " +responseInfo);
                String access = null;
                String openId = null;
                try {
                    JSONObject jsonObject = new JSONObject(responseInfo);
                    access = jsonObject.getString("access_token");
                    openId = jsonObject.getString("openid");
                } catch (Exception e) {
                    e.printStackTrace();
                }
                getUserInfo(access, openId);
            }
        });
    }

    private void createProgressDialog() {
        mProgressDialog = new ProgressDialog(this);
        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);//转盘
        mProgressDialog.setCancelable(false);
        mProgressDialog.setCanceledOnTouchOutside(false);
        mProgressDialog.setTitle("提示");
        mProgressDialog.setMessage("登录中，请稍后");
        mProgressDialog.show();
    }

    private void getUserInfo(String access, String openid) {
        String getUserInfoUrl = "https://api.weixin.qq.com/sns/userinfo?access_token=" + access + "&openid=" + openid;
        OkHttpClient okHttpClient = new OkHttpClient();
        final Request request = new Request.Builder()
                .url(getUserInfoUrl)
                .get()//默认就是GET请求，可以不写
                .build();
        Call call = okHttpClient.newCall(request);
        call.enqueue(new Callback() {
            @Override
            public void onFailure(Call call, IOException e) {
                Log.d(TAG, "onFailure: ");
                mProgressDialog.dismiss();
            }

            @Override
            public void onResponse(Call call, Response response) throws IOException {
                String responseInfo = response.body().string();
                Log.d(TAG, "onResponse: " + responseInfo);
                SharedPreferences.Editor editor = getSharedPreferences("userInfo", MODE_PRIVATE).edit();
                editor.putString("responseInfo", responseInfo);
                editor.commit();
                finish();
                mProgressDialog.dismiss();
            }
        });
    }

    String TAG = "zhu";
}

最后在需要的位置直接调用（比如MainActivity.java）：

private void regToWx() {
        // APP_ID 替换为你的应用从官方网站申请到的合法appID
        String APP_ID = "wx00bb0933b4fcb111";

        // IWXAPI 是第三方app和微信通信的openApi接口
        IWXAPI api;
        // 通过WXAPIFactory工厂，获取IWXAPI的实例
        api = WXAPIFactory.createWXAPI(context, APP_ID, true);

        // 将应用的appId注册到微信
        api.registerApp(APP_ID);

        //建议动态监听微信启动广播进行注册到微信
        context.registerReceiver(new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {

                // 将该app注册到微信
                api.registerApp(APP_ID);
            }
        }, new IntentFilter(ConstantsAPI.ACTION_REFRESH_WXAPP));

        if (!api.isWXAppInstalled()) {
            Toast.makeText(context, "您的设备未安装微信客户端", Toast.LENGTH_SHORT).show();
        } else {
            final SendAuth.Req req = new SendAuth.Req();
            req.scope = "snsapi_userinfo";
            req.state = "wechat_sdk_demo_test";
            api.sendReq(req);
        }

    }