如何通过代码远程解锁Android手机

Question

I have written an application that locks android phone remotely. That is when a special code is sent from server then application locks the phone based on the special code. This is the code I am using.

if (!mDPM.isAdminActive(mDeviceAdminSample)) {
        // try to become active – must happen here in this activity, to get result
        Intent intent = new Intent(DevicePolicyManager.ACTION_ADD_DEVICE_ADMIN);
        intent.putExtra(DevicePolicyManager.EXTRA_DEVICE_ADMIN,mDeviceAdminSample);
        intent.putExtra(DevicePolicyManager.EXTRA_ADD_EXPLANATION,"Admin is added to do security operation.");
        startActivityForResult(intent, 0);
        } else {
        // Already is a device administrator, can do security operations now.
        mDPM.lockNow();
        }

The above code is working and it's locking the phone.

I am able to unlock the phone by entering password from soft keypad. Is there any way to unlock it through code?

My question is how to unlock the phone through code.(This unlocking should be done remotely in the manner I explained for locking)

Answer 1

I believe you cannot override the built-in screen-lock unless you make your own device like Samsung and HTC do. However, by having your customers use your own screen-lock-like app you probably can achieve what you are trying to do.

Answer 2

I do not think your remote unlock goal is achievable.

The way Android is set up, is that many apps may have Device Administrator privilege, and any Device Administrator can issue a lock command, but the unlock has to come from the user.

I can suggest one thing you to simplify this: Your app could try to remove the key lock password, and then the user can use the device without a code simply by sliding a finger on the screen.

Now there is a snag in what I suggested, if your app is not the only device administrator. In that case, some other administrator app could set a minimum password length (or some other password restriction) which would prevent your app from clearing the screen lock password.

If your goal is to help a user that forgot his/her screen lock password, then your server could invent a new password, inform the user what the new password is, and also send the new password to your app and your app could apply the password. The user can then unlock the phone. Do not worry, it is not as complicated as it sounds.

Answer 3

Sorry to write that - There is no way to unlock phone from code. If you find any way to do that - no warranty to work. So there is no way to remote unlock, writing custom lock screens, etc.

Answer 4

You need to use mDPM.resetPassword("", 0)

http://developer.android.com/reference/android/app/admin/DevicePolicyManager.html#resetPassword(java.lang.String , int)

When set password string as "", current password is replaced with empty values & screen lock disappears.

Answer 5

try this

KeyguardManager manager = (KeyguardManager)context.getSystemService(KEYGUARD_SERVICE);
kl = manager.newKeyguardLock("my-remote-app");
kl.disableKeyguard();

//for reenabling keyguard on exit (if you need)

onDestroy() {
kl.reenableKeyguard();
}

this works <=ICS. This is a deprecated api, they suggested you to use the flags from WindowManager for similar effect. Although I failed to generate the similar effect using the WindowManger.

Hope this helps,

Answer 6

Please note that I'm not an Android developer, but:

If you look at this , it looks like you can ask the WindowManager to dismiss the key guard if you have the right permission, even if you're in "secure lock" mode.

Answer 7

据我所知，我们无法以编程方式解锁受密码保护的手机。

Answer 8

One solution would be to write a "custom lockscreen". Sure, it's not the easiest way, but it would work as you can do everything you want with your own lockscreen. If you are considering that solution, feel free to contact me, I'll give you some useful links. Cheers!