Google has been using a service providing automated scanning of applications submitted to the Android Market. The service scans the market for potentially malicious software without disrupting the user experience or requiring developers to submit to an application approval process. Google found that between the first and second halves of last year, there was a 40 percent decrease in the number of potentially malicious downloads from Android Market, Google says. Google also analyzes new developer accounts to help prevent malicious developers from coming back, the vice of engineering for Android said.”]
Source: https://www.csoonline.com/article/2130726/google-finally-scans-malware-ridden-android-market.html