Android integrated WeChat login, share text and image url applet

1. Add dependencies

implementation 'com.tencent.mm.opensdk:wechat-sdk-android-without-mta:+'

2. WeChat login and sharing function

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.widget.Toast;

import com.tencent.mm.opensdk.modelmsg.SendAuth;
import com.tencent.mm.opensdk.modelmsg.SendMessageToWX;
import com.tencent.mm.opensdk.modelmsg.WXImageObject;
import com.tencent.mm.opensdk.modelmsg.WXMediaMessage;
import com.tencent.mm.opensdk.modelmsg.WXMiniProgramObject;
import com.tencent.mm.opensdk.modelmsg.WXTextObject;
import com.tencent.mm.opensdk.modelmsg.WXWebpageObject;
import com.tencent.mm.opensdk.openapi.IWXAPI;
import com.tencent.mm.opensdk.openapi.WXAPIFactory;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;


/**
 * Created by zhaoyi on 2018/02/01.
 */

public class WxShareAndLoginUtils {

    public static int WECHAT_FRIEND = 0;  //分享好友
    public static int WECHAT_MOMENT = 1;  //分享朋友圈
    private static IWXAPI iwxapi;

    public static IWXAPI getWXAPI(Context context) {
        if (iwxapi == null) {
            //通过WXAPIFactory创建IWAPI实例
            //Config.APP_ID为微信开放平台上注册申请的应用id
            iwxapi = WXAPIFactory.createWXAPI(context, Config.APP_ID, false);
            //将应用的appid注册到微信
            iwxapi.registerApp(Config.APP_ID);
        }
        return iwxapi;
    }

    /**
     * 微信登录
     */
    public static void WxLogin(Context context) {
        if (!judgeCanGo(context)) {
            return;
        }
        SendAuth.Req req = new SendAuth.Req();
        //授权域 获取用户个人信息则填写snsapi_userinfo
        req.scope = "snsapi_userinfo";
        //用于保持请求和回调的状态 可以任意填写
        req.state = "test_login";
        iwxapi.sendReq(req);
    }

    /**
     * 分享文本至朋友圈
     *
     * @param text  文本内容
     * @param judge 类型选择 好友-WECHAT_FRIEND 朋友圈-WECHAT_MOMENT
     */
    public static void WxTextShare(Context context, String text, int judge) {
        if (!judgeCanGo(context)) {
            return;
        }
        //初始化WXTextObject对象，填写对应分享的文本内容
        WXTextObject textObject = new WXTextObject();
        textObject.text = text;
        //初始化WXMediaMessage消息对象，
        WXMediaMessage message = new WXMediaMessage();
        message.mediaObject = textObject;
        message.description = text;
        //构建一个Req请求对象
        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = String.valueOf(System.currentTimeMillis());   //transaction用于标识请求
        req.message = message;
        req.scene = judge;      //分享类型 好友==0 朋友圈==1
        //发送请求
        iwxapi.sendReq(req);
    }

    /**
     * 分享图片
     *
     * @param bitmap 图片bitmap,建议别超过32k
     * @param judge  类型选择 好友-WECHAT_FRIEND 朋友圈-WECHAT_MOMENT
     */
    public static void WxBitmapShare(Context context, Bitmap bitmap, int judge) {
        if (!judgeCanGo(context)) {
            return;
        }
        WXImageObject wxImageObject = new WXImageObject(bitmap);
        WXMediaMessage message = new WXMediaMessage();
        message.mediaObject = wxImageObject;

        Bitmap thunmpBmp = Bitmap.createScaledBitmap(bitmap, 50, 50, true);
        bitmap.recycle();
        message.thumbData = ImageUtil.bmpToByteArray(thunmpBmp, true);

        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = String.valueOf(System.currentTimeMillis());
        req.message = message;
        req.scene = judge;

        iwxapi.sendReq(req);

    }

    /**
     * 网页分享
     *
     * @param url         地址
     * @param title       标题
     * @param description 描述
     * @param judge       类型选择 好友-WECHAT_FRIEND 朋友圈-WECHAT_MOMENT
     */
    public static void WxUrlShare(Context context, String url, String title, String description, String imgUrl, int judge) {
        if (!judgeCanGo(context)) {
            return;
        }
        Bitmap bitmap = getBitMBitmap(imgUrl);
        WXWebpageObject wxWebpageObject = new WXWebpageObject();
        wxWebpageObject.webpageUrl = url;

        WXMediaMessage wxMediaMessage = new WXMediaMessage(wxWebpageObject);
        wxMediaMessage.title = title;
        wxMediaMessage.description = description;
        Bitmap thunmpBmp = Bitmap.createScaledBitmap(bitmap, 50, 50, true);
        bitmap.recycle();
        wxMediaMessage.thumbData = ImageUtil.bmpToByteArray(thunmpBmp, true);

        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = String.valueOf(System.currentTimeMillis());
        req.message = wxMediaMessage;
        req.scene = judge;

        iwxapi.sendReq(req);
    }

    /**
     * 小程序分享
     *
     * @param bitmap 分享到微信显示的图片
     */
    public static void WxMiniProgramShare(Bitmap bitmap) {

        WXMiniProgramObject miniProgram = new WXMiniProgramObject();
        miniProgram.webpageUrl = "http://www.qq.com";//自定义
        miniProgram.userName = "xxxxxxxxx";//小程序端提供参数
        miniProgram.path = "pages/entry";//小程序端提供参数
        WXMediaMessage mediaMessage = new WXMediaMessage(miniProgram);
        mediaMessage.title = "cgw miniProgram";//自定义
        mediaMessage.description = "this is miniProgram's description";//自定义
        //分享到微信显示的图片
        Bitmap sendBitmap = Bitmap.createScaledBitmap(bitmap, 200, 200, true);
        bitmap.recycle();
        mediaMessage.thumbData = bmpToByteArray(sendBitmap, true);
        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = "";
        req.scene = SendMessageToWX.Req.WXSceneSession;
        req.message = mediaMessage;
        iwxapi.sendReq(req);
    }


    private static boolean judgeCanGo(Context context) {
        getWXAPI(context);
        if (!iwxapi.isWXAppInstalled()) {
            Toast.makeText(context, "请先安装微信应用", Toast.LENGTH_SHORT).show();
            return false;
        }
        return true;
    }


    /**
     * 图片url转bitmap
     */
    private static Bitmap getBitMBitmap(String urlpath) {
        Bitmap map = null;
        try {
            URL url = new URL(urlpath);
            URLConnection conn = url.openConnection();
            conn.connect();
            InputStream in;
            in = conn.getInputStream();
            map = BitmapFactory.decodeStream(in);
            // TODO Auto-generated catch block
        } catch (IOException e) {
            e.printStackTrace();
        }
        return map;
    }

    //图片转byteArray
    private static byte[] bmpToByteArray(final Bitmap bmp, final boolean needRecycle) {
        ByteArrayOutputStream output = new ByteArrayOutputStream();
        bmp.compress(Bitmap.CompressFormat.PNG, 100, output);
        if (needRecycle) {
            bmp.recycle();
        }

        byte[] result = output.toByteArray();
        try {
            output.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return result;
    }
}