ANR产生的原因及定位分析：
https://juejin.im/entry/597026806fb9a06bcb7fc660
https://blog.csdn.net/alcoholdi/article/details/60144022
内存泄漏 ：
Handler机制：
https://blog.csdn.net/kai_zone/article/details/80163098
事件chua传递机制：
https://blog.csdn.net/kai_zone/article/details/80141949
算法：
https://blog.csdn.net/soullines/article/details/78093668
https://blog.csdn.net/csdn_aiyang/article/details/73108606
https://blog.csdn.net/wojiaotianyong/article/details/72615055
单例模式 ：
https://blog.csdn.net/goodlixueyong/article/details/51935526