微信分享

package com.hmkj.hx_finance_android.util;

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

import com.tencent.mm.opensdk.modelmsg.SendMessageToWX;
import com.tencent.mm.opensdk.modelmsg.WXMediaMessage;
import com.tencent.mm.opensdk.modelmsg.WXWebpageObject;
import com.tencent.mm.opensdk.openapi.IWXAPI;
import com.tencent.mm.opensdk.openapi.WXAPIFactory;


public class WXManager {
    public static final int WEIXIN_SHARE_TYPE_FRENDS = SendMessageToWX.Req.WXSceneTimeline;
    public static final int WEIXIN_SHARE_TYPE_TALK = SendMessageToWX.Req.WXSceneSession;
    public final static String APP_ID="wx4ca167f39b254aa1";
    public static IWXAPI api;
    private Context context;

    public WXManager(Context context){
        this.context=context;
        initWeixin(context);
    }


    /**
     * 向微信註冊APPID
     * @param context
     */
    private void initWeixin(Context context) {
        api = WXAPIFactory.createWXAPI(context, APP_ID,false);
        api.registerApp(APP_ID);
        if(!api.isWXAppInstalled()){
            CommonUtil.showToast(context,"你沒有安裝微信");
        }
    }

    /**
     * 微信 分享
     * @param shareType 分享類型：1好友 WEIXIN_SHARE_TYPE_TALK 2朋友圈 WEIXIN_SHARE_TYPE_FRENDS
     * @param title 標題
     * @param detail 描述
     * @param drawable 圖片
     * @param url 分享的網址
     */
    public void shareToWeixin(int shareType,String title,String detail,int drawable,String url) {


        WXWebpageObject webpage = new WXWebpageObject();
        webpage.webpageUrl = url;//收到分享的好友點擊會跳轉到這個地址裏面去
        WXMediaMessage msg = new WXMediaMessage(webpage);
        msg.title = title;
        msg.description = detail;
        try {
            Bitmap bmp = BitmapFactory.decodeResource(context.getResources(), drawable);
            Bitmap thumbBmp = Bitmap.createScaledBitmap(bmp, 150, 150, true);
            bmp.recycle();
            msg.setThumbImage(thumbBmp);
        } catch (Exception e) {
            e.printStackTrace();
        }
        SendMessageToWX.Req req = new SendMessageToWX.Req();
        req.transaction = String.valueOf(System.currentTimeMillis());
        req.message = msg;
        req.scene = shareType;
        api.sendReq(req);

    }

    private String buildTransaction(final String type) {
        return (type == null) ? String.valueOf(System.currentTimeMillis()) : type + System.currentTimeMillis();
    }

    private  String subStringByByte(String str, int len) {
        String result = null;
        if (str != null) {
            byte[] a = str.getBytes();
            if (a.length <= len) {
                result = str;
            } else if (len > 0) {
                result = new String(a, 0, len);
                int length = result.length();
                if (str.charAt(length - 1) != result.charAt(length - 1)) {
                    if (length < 2) {
                        result = null;
                    } else {
                        result = result.substring(0, length - 1);
                    }
                }
            }
        }
        return result;
    }
}