Enable screen lock and Home Key (eclair and older versions)

From: http://rootfs.wordpress.com/2010/07/23/android-enable-home-screen-lock-and-home-key/

 

The lock pattern does not take effect after setting. And the home key does not work.

1. Frameworks/base/policies/phone/COM/Android/Internal/policy/impl/keyguardviewmediator. java.

In private void dokeyguard () routine:

Final Boolean provisioned = mupdatemonitor. isdeviceprovisioned ();

...

If (! Lockedormissing &&! Provisioned ){
If (Debug) log. D (TAG, "dokeyguard: Not showing because device isn' t provisioned"
+ "And the SIM is not locked or missing ");
Return;
}

2. Frameworks/base/policies/phone/COM/Android/Internal/policy/impl/keyguardupdatemonitor. java.

Public Boolean isdeviceprovisioned (){
Return mdeviceprovisioned;
}

In public keyguardupdatemonitor (context) routine:

Mdeviceprovisioned = settings. Secure. getint (
Mcontext. getcontentresolver (), settings. Secure. device_provisioned, 0 )! = 0;

3. Frameworks/base/CORE/Java/Android/provider/settings. Java

Public static final string device_provisioned = secure. device_provisioned;

The default value for device_provisioned is 0, need set it to 1.

Fix 1: (modify the database)

$ ADB Shell

$ CD Data/data/COM. Android. providers. Settings/databases

$ Sqlite3 settings. DB

SQLite>. Tables

SQLite> select * from secure;

SQLite> insert into secure (name, value) values ('device _ provisioned', 1 );

SQLite>. Exit

$

Reboot the phone, lock screen shows up. Note that this modification also enables the home and some other key functions.

Fix 2: (need to rebuild the image)

1. Modify packages/apps/launcher/src/COM/Android/launcher. Java as follows:

1): Add "Import Android. provider. settings;" to the header.

2): Add below line to somewhere of the oncreate () routine:

Settings. Secure. putint (getcontentresolver (), settings. Secure. device_provisioned, 1 );

2. Add write permission in packages/apps/launcher/androidmenifest. xml:

<! -<Uses-Permission Android: Name = "android. Permission. write_settings"/> already exist->
<Uses-Permission Android: Name = "android. Permission. write_secure_settings"/>

Rebuild the image. The lock pattern and Home key function wocould work now.

 

Note: Since Android 2.2 (froyo), a default provision package has been added to the system image. So the issue has gone.