Since the beginning of the development of Android smartphones, users have searched for the coolest and most difficult pattern locking ideas they can set up on their Android devices to protect their privacy and data. Today I have 20 of the coolest, toughest and best ideas for Android locking patterns that you can use on your device. These pattern-lock ideas are not just hacked proofs, but it’s also very difficult to keep track of the sequence even when someone is looking at your screen while you draw it. Sounds interesting, right? Check out the best protective android lock pattern ideas for your Android devices.