Set lockscreen to “None” programmatically?

Question

I have the requirement to disable the lock screen and set the lock screen type to \"None\". My device is rooted (can run with SU permission) + can run as a system applicatio

Answer 1

I would like to explore exilit answer. From the source, we finally get into this:

mChooseLockSettingsHelper.utils().clearLock(false);
mChooseLockSettingsHelper.utils().setLockScreenDisabled(disabled);

The utils is the com.android.internal.widget.LockPatternUtils object and we can somehow get it by reflection. Here is the code:

    try{
            Class lockPatternUtilsCls = Class.forName("com.android.internal.widget.LockPatternUtils");
            Constructor lockPatternUtilsConstructor = 
                lockPatternUtilsCls.getConstructor(new Class[]{Context.class});
            Object lockPatternUtils = lockPatternUtilsConstructor.newInstance(MyActivity.this);

            Method clearLockMethod = lockPatternUtils.getClass().getMethod("clearLock", boolean.class);
            Method setLockScreenDisabledMethod = lockPatternUtils.getClass().getMethod("setLockScreenDisabled", boolean.class);

            clearLockMethod.invoke(lockPatternUtils, false);
            setLockScreenDisabledMethod.invoke(lockPatternUtils, true);                 
            Log.d(TAG, "set lock screen to NONE SUC");
    }catch(Exception e){
            Log.e(TAG, "set lock screen to NONE failed", e);
    }

Well my testing app is with signed with platform key and a system app. I think it will be a must.

Updated: Noticed that the methods arguments are changed on Android 6.