前言：
每每写博客都在凌晨，逆向这活不好干啊！！！眼看着头秃了，腰包却没有鼓起来。。。
抖音直播间公屏信息解析，说白了就是将抖音直播间公屏上加密的数据小白化，然后直接拉取出来保存在本地，比如某某送了礼物、某某关注了主播、某某说了句什么话、某某分享了直播间等等，这些数据保存在本地后，可进行二次分析，具有一定的价值。
怎么实现：
1、使用jadx反编译apk，或者反编译抖音apk包中对应的某一个dex即可；
2、找到直播间相关文件（函数）；
3、分析关键函数，并抽取关键函数为己用；
4、通过协议方式请求直播间数据（每间隔1秒请求一次），获取返回数据（返回数据是加密过的）；
5、对返回数据进行解密。
jadx:
结果：
1、进入直播间消息：
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2、互动消息：
{"common":{"is_show_msg":true,"method":"WebcastChatMessage","msg_id":6847183653836016397,"room_id":6847101220063021837},"content":"待够半小时了，减一半才对","user":{"avatar_thumb":{"uri":"100x100/tos-cn-i-0813/e358f89f76d44b4b8fb94e2beabcd348","url_list":["https://p9-dy.byteimg.com/img/tos-cn-i-0813/e358f89f76d44b4b8fb94e2beabcd348~c5_100x100.jpeg?from\u003d4010531038","https://p6-dy-ipv6.byteimg.com/img/tos-cn-i-0813/e358f89f76d44b4b8fb94e2beabcd348~c5_100x100.jpeg?from\u003d4010531038","https://p3-dy.byteimg.com/img/tos-cn-i-0813/e358f89f76d44b4b8fb94e2beabcd348~c5_100x100.jpeg?from\u003d4010531038"]},"badge_image_list":[{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p3-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32},{"image_type":7,"uri":"webcast/vcd_aweme_fansclub_7.png","url_list":["http://p1-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_7.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_7.png~tplv-obj.image"]}],"display_id":"590243102","fans_club":{"data":{"anchor_id":101216169856,"available_gift_ids":[],"badge":{"icons":{"2":{"uri":"webcast/vcd_aweme_fansclub_7.png","url_list":["http://p1-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_7.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_7.png~tplv-obj.image"]}},"title":"浩家军"},"club_name":"浩家军","level":7,"user_fans_club_status":"Active"},"prefer_data":{"1":{"anchor_id":101216169856,"available_gift_ids":[],"badge":{"icons":{"2":{"uri":"webcast/vcd_aweme_fansclub_7.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_7.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_7.png~tplv-obj.image"]}},"title":"浩家军"},"club_name":"浩家军","level":7,"user_fans_club_status":"Active"}}},"follow_info":{"follower_count":1,"following_count":59},"gender":2,"id":61011336108,"new_real_time_icons":[],"nickname":"小小小小太阳吖","pay_grade":{"grade_icon_list":[],"level":16,"new_im_icon_with_level":{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p3-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32},"new_live_icon":{"height":12,"image_type":1,"uri":"webcast/aweme_pay_grade_2x_15_19.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image"],"width":12}},"real_time_icons":[],"sec_uid":"MS4wLjABAAAAstlNFvda1TAA3kuzDIzu_sYVO3TE4_Ft_7c3BVE04Tc","short_id":590243102,"top_fans":[],"user_attr":{}}}
3、关注主播消息：
{"action":1,"common":{"display_text":{"default_format":{"color":"#8CE7FF","weight":400},"default_pattern":"{0:user} 关注了主播","key":"room_follow_msg","pieces":[{"type":11,"user_value":{"user":{"avatar_thumb":{"uri":"100x100/2fa2b0007d682105807df","url_list":["https://p9-dy-ipv6.byteimg.com/aweme/100x100/2fa2b0007d682105807df.jpeg?from\u003d4010531038","https://p6-dy-ipv6.byteimg.com/aweme/100x100/2fa2b0007d682105807df.jpeg?from\u003d4010531038","https://p3-dy.byteimg.com/aweme/100x100/2fa2b0007d682105807df.jpeg?from\u003d4010531038"]},"badge_image_list":[{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p9-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32}],"display_id":"hwly1818","fans_club":{"data":{"available_gift_ids":[],"badge":{"icons":{"0":{"url_list":[]}}}},"prefer_data":{}},"follow_info":{"follower_count":120,"following_count":215},"gender":2,"id":109071585746,"new_real_time_icons":[],"nickname":"珠珠看世界","pay_grade":{"grade_icon_list":[],"level":16,"new_im_icon_with_level":{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p9-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32},"new_live_icon":{"height":12,"image_type":1,"uri":"webcast/aweme_pay_grade_2x_15_19.png","url_list":["http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image"],"width":12}},"real_time_icons":[],"sec_uid":"MS4wLjABAAAA7109KnhzwVFBuYhNC_cY5JsyqWN787qX3qgUQpr9NqA","short_id":1843245016,"top_fans":[],"user_attr":{}}}}]},"is_show_msg":true,"method":"WebcastSocialMessage","msg_id":6847185487921367819,"room_id":6847101220063021837},"follow_count":276533,"share_target":"101216169856","user":{"avatar_thumb":{"uri":"100x100/2fa2b0007d682105807df","url_list":["https://p9-dy-ipv6.byteimg.com/aweme/100x100/2fa2b0007d682105807df.jpeg?from\u003d4010531038","https://p6-dy-ipv6.byteimg.com/aweme/100x100/2fa2b0007d682105807df.jpeg?from\u003d4010531038","https://p3-dy.byteimg.com/aweme/100x100/2fa2b0007d682105807df.jpeg?from\u003d4010531038"]},"badge_image_list":[{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p9-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32}],"display_id":"hwly1818","fans_club":{"data":{"available_gift_ids":[],"badge":{"icons":{"0":{"url_list":[]}}}},"prefer_data":{}},"follow_info":{"follower_count":120,"following_count":215},"gender":2,"id":109071585746,"new_real_time_icons":[],"nickname":"珠珠看世界","pay_grade":{"grade_icon_list":[],"level":16,"new_im_icon_with_level":{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p9-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32},"new_live_icon":{"height":12,"image_type":1,"uri":"webcast/aweme_pay_grade_2x_15_19.png","url_list":["http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image"],"width":12}},"real_time_icons":[],"sec_uid":"MS4wLjABAAAA7109KnhzwVFBuYhNC_cY5JsyqWN787qX3qgUQpr9NqA","short_id":1843245016,"top_fans":[],"user_attr":{}}}
4、送礼物消息：
{"combo_count":1,"common":{"create_time":1594234647302,"describe":"袁先生:送给主播 1个粉丝团灯牌","display_text":{"default_format":{"color":"#ffface15","weight":400},"default_pattern":"{0:user} 送出{1:gift} {2:string}","key":"webcast_aweme_gift_send_message","pieces":[{"format":{"color":"#ff8ce7ff","weight":400},"type":11,"user_value":{"user":{"avatar_thumb":{"uri":"100x100/1cab700074a01ee5ab1f2","url_list":["https://p3-dy-ipv6.byteimg.com/aweme/100x100/1cab700074a01ee5ab1f2.jpeg?from\u003d4010531038","https://p1-dy.byteimg.com/aweme/100x100/1cab700074a01ee5ab1f2.jpeg?from\u003d4010531038","https://p29-dy.byteimg.com/aweme/100x100/1cab700074a01ee5ab1f2.jpeg?from\u003d4010531038"]},"badge_image_list":[{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32}],"display_id":"qixin666666","fans_club":{"data":{"anchor_id":101216169856,"available_gift_ids":[],"badge":{"icons":{"2":{"uri":"webcast/vcd_aweme_fansclub_1_lightdown.png","url_list":["http://p1-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_1_lightdown.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_1_lightdown.png~tplv-obj.image"]}},"title":"浩家军"},"club_name":"浩家军","level":1,"user_fans_club_status":"Inactive"},"prefer_data":{"1":{"anchor_id":84064249580,"available_gift_ids":[],"badge":{"icons":{"2":{"uri":"webcast/vcd_aweme_fansclub_10.png","url_list":["http://p3-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_10.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_10.png~tplv-obj.image"]}},"title":"忠哥"},"club_name":"忠哥","level":10,"user_fans_club_status":"Active"}}},"follow_info":{"follower_count":208,"following_count":1638},"gender":1,"id":98130261360,"new_real_time_icons":[],"nickname":"袁先生","pay_grade":{"grade_icon_list":[],"level":16,"new_im_icon_with_level":{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32},"new_live_icon":{"height":12,"image_type":1,"uri":"webcast/aweme_pay_grade_2x_15_19.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image","http://p3-webcast-dycdn.byteimg.com/img/webcast/aweme_pay_grade_2x_15_19.png~tplv-obj.image"],"width":12}},"real_time_icons":[],"sec_uid":"MS4wLjABAAAA61jKrUdA8bYNRf4rKEFzLBEcvLbJvvNgcmCp1oxCxZg","short_id":913977124,"top_fans":[],"user_attr":{}}}},{"gift_value":{"gift_id":685,"name_ref":{"default_pattern":"粉丝团灯牌","key":"live_gift_685"}},"type":12},{"format":{"color":"#ffface15","weight":400},"string_value":"x1","type":1}]},"is_show_msg":true,"method":"WebcastGiftMessage","msg_id":6847180931372075789,"room_id":6847101220063021837},"fan_ticket_count":446900824,"gift_id":685,"group_count":1,"repeat_count":1,"room_fan_ticket_count":4356714,"user":{"avatar_thumb":{"uri":"100x100/1cab700074a01ee5ab1f2","url_list":["https://p3-dy-ipv6.byteimg.com/aweme/100x100/1cab700074a01ee5ab1f2.jpeg?from\u003d4010531038","https://p1-dy.byteimg.com/aweme/100x100/1cab700074a01ee5ab1f2.jpeg?from\u003d4010531038","https://p29-dy.byteimg.com/aweme/100x100/1cab700074a01ee5ab1f2.jpeg?from\u003d4010531038"]},"badge_image_list":[{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image"],"width":32}],"display_id":"qixin666666","fans_club":{"data":{"anchor_id":101216169856,"available_gift_ids":[],"badge":{"icons":{"2":{"uri":"webcast/vcd_aweme_fansclub_1_lightdown.png","url_list":["http://p1-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_1_lightdown.png~tplv-obj.image","http://p9-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_1_lightdown.png~tplv-obj.image"]}},"title":"浩家军"},"club_name":"浩家军","level":1,"user_fans_club_status":"Inactive"},"prefer_data":{"1":{"anchor_id":84064249580,"available_gift_ids":[],"badge":{"icons":{"2":{"uri":"webcast/vcd_aweme_fansclub_10.png","url_list":["http://p3-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_10.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/webcast/vcd_aweme_fansclub_10.png~tplv-obj.image"]}},"title":"忠哥"},"club_name":"忠哥","level":10,"user_fans_club_status":"Active"}}},"follow_info":{"follower_count":208,"following_count":1638},"gender":1,"id":98130261360,"new_real_time_icons":[],"nickname":"袁先生","pay_grade":{"grade_icon_list":[],"level":16,"new_im_icon_with_level":{"height":16,"image_type":1,"uri":"webcast/aweme_honor_level_icon_new_16.png","url_list":["http://p6-webcast-dycdn.byteimg.com/img/webcast/aweme_honor_level_icon_new_16.png~tplv-obj.image","http://p1-webcast-dycdn.byteimg.com/img/web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还有很多其他公屏上的信息可以解析出来，就不一一列举了...
做了一个动图，大伙感受下：
纯协议，无需什么模拟器脚本什么的，是不是很完美！！！
交流合作请加我vx:YY_yhzf