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Is there any way to have the lock-screen unlock as soon as I enter the correct code? For instance, on my iPod touch if I type the 4 digit passcode, it'll unlock as soon as I hit that fourth digit. Is there any equivalent of this on Android? On my Droid X2, I have to enter the PIN and then hit the arrow-like return button.

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up vote 6 down vote accepted

No, because unlike the iphone/ipod touch, the unlock PIN can be longer then 4 digits. Android allows between 4 and 16 digits for the lock screen. Since it is "unknown" what the length of your pin is, you have to press OK to indicate "you are done".

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2  
Ahh. Too bad it just doesn't compare the hashes on each tap. – Kevin Mark Jun 6 '11 at 18:52

Yes, the question is old but remains valid for current time as well, so I'm answering keeping currently relevant Android versions in mind.

If your Android is rooted, has a compatible Xposed Framework1 installed, then provided that your Android can run GravityBox Xposed module, the latter can solve the problem.

Instructions:

  1. Install GravityBox relevant to your Android version, enable the module under Xposed Installer app and reboot the device.
  2. Launch GravityBox, go to Lockscreen tweaks and enable Quick unlock. Once you enable it, the previously grayed out entry named PIN length would become available for tweak. Set it to the length your current PIN/Password consists of.

Changes would take place immediately.

(Click image to enlarge)

IMG:

Official GravityBox versions:


1 Xposed Framework: Android 4.x, Android 5.x and 6.x

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The Cyanogenmod (checked in CM10) lock screen also allows to unlock as soon as you enter the correct code.

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That's a nice feature of CyanogenMod. But the OP doesn't have CyanogenMod installed, so it won't help him specifically. – Stephen Schrauger Oct 22 '14 at 13:27
    
This close to what I was looking for. I updated to CM13 and can no longer find this option. – stvn66 Apr 5 at 20:42

Handcent SMS has a lockscreen with PIN input that also has similar functionality. Entering the correct code auto unlocks when the last correct digit is entered without the need to press OK.

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Some of the alternate lock types unlock immediately.

The built-in Android pattern lock, where you do a "join the dots" between the nine dots displayed on the screen unlocks immediately your finger lifts off the screen (presuming that you've got the pattern right).

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he's talking about the PIN code.. – Power-Inside Jun 7 '11 at 4:25
1  
@Power Clearly yes, and I'm talking about alternates to the PIN code that do what he wants. – GAThrawn Jun 7 '11 at 8:47

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