AdAway is an open source ad blocker for Android using the hosts file.

AttentionDEVICE MUST BE ROOTED FOR THIS APPLICATION
Description
AdAway is a utility used to manage hostfile entries; your phone must be rooted to use this app. AdAway doesn't directly block ads; it limits unwanted ads by blocking servers that distribute those ads to websites. Modifying hostfile entries is also useful in blocking ads on some Android apps.
Requirements
• ROOT
• Read/Write access on system partition
Website with Source code and Issue Tracker
http://code.google.com/p/ad-away
Translations
Help translate AdAway on https://www.transifex.net/projects/p/adaway
Donate
You can donate money to support the development in-app.
Permissions
• Root accessTo write hosts file to system partition
• Internet accessTo download hosts files
• Modify/delete SD card contentTo export lists to SD card
• WakelockWake up phone when AdAway updates in background
• Google Play BillingTo donate via Google Play Store
Keywords
adblock, adblocker, ad blocker, advertisments, advertisment blocker