android(ICS,JB)에서 Lock Screen 설정 None으로 만들기

JB에서부터는 아래 코드를 적용해서 default가 none으로 설정되지 않습니다.

def_lockscreen_disabled 값을 true로 주시면 코드 수정없이 됩니다.

overlay/frameworks/base/packages/SettingsProvider/res/values/defaults.xml


<?xml version="1.0" encoding="utf-8"?>
<!--
/**
 * Copyright (c) 2009, The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
-->
<resources>
    <bool name="def_accelerometer_rotation">false</bool>
    <bool name="def_lockscreen_disabled">true</bool>
    <integer name="def_screen_off_timeout">604800000</integer>
    <bool name="def_install_non_market_apps">true</bool>
</resources>

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http://codewalkerster.blogspot.com/2011/11/android-lockscreen.html

gingerbread에서는 Screen lock을 PhoneWindowManager.java를 직접 수정하여 없앨 수 있었습니다.

ICS 부터는 아래와 같이 Screen lock - None이란 항목이 있습니다.

그런데 첫 부팅 후 default가 None으로 설정하려고 합니다.

framework/base/core/java/com/android/internal/widget/LockPatternUtils.java

    public boolean isLockScreenDisabled() {
        return !isSecure() && getLong(DISABLE_LOCKSCREEN_KEY, 1) != 0;
        //return !isSecure() && getLong(DISABLE_LOCKSCREEN_KEY, 0) != 0;
    }

    public int getKeyguardStoredPasswordQuality() {

        int quality =

                (int) getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_UNSPECIFIED);

                //(int) getLong(PASSWORD_TYPE_KEY, DevicePolicyManager.PASSWORD_QUALITY_SOMETHING);

        // If the user has chosen to use weak biometric sensor, then return the backup locking

        // method and treat biometric as a special case.

        if (quality == DevicePolicyManager.PASSWORD_QUALITY_BIOMETRIC_WEAK) {

            quality =

                (int) getLong(PASSWORD_TYPE_ALTERNATE_KEY,

                        DevicePolicyManager.PASSWORD_QUALITY_SOMETHING);

        }    

        return quality;

    }