The increasing presence of Android privacy leakages poses a significant privacy risk for Android smartphone users.This paper proposes a privacy leakage detection method based on behavior chain

which can achieve the fine-grained location of the source and points of the information leakage.With the WxShall algorithm

we can calculate the accessibility between the leakage source and leakage points

and detect the transfer path of privacy in Android applications.The detections of 1259 Android applications show that the accuracy of this algorithm reaches 95.1% and the complexity accounts for 5.45% of WarShall algorithm.The results of the experiments demonstrate that the method is better than Androgurad and Kirin.