【實用工具app】Trusted WiFi Networks|最夯免費app-綠色工廠好玩App

Do you want your screen to be securily locked by a PIN, but not want to enter the PIN everytime when you are in a trusted environment like for example your home or at your parents house? If so, then this app does exactly what you want. It by default locks your screen with a PIN of your choice and automatically unlocks it whenever you connect to a trusted WiFi network. Upon leaving the trusted WiFi network, your screen will automatically be locked again with your PIN.

If you find issues (see the issue list below!) or having requests, please contact me! Also instead of rating 1 star, please give some usefull feedback so I can try to improve the app.

Features

- Mark the WiFi networks (in environments) you feel safe as "trusted". The app will automatically unlock your screen whenever you connect to one of those WiFi networks

- Set a PIN of your choice that is used to lock the screen

- As an extra safe guard you can have the app ask for your PIN one more time before it unlocks your screen when connecting to a trusted WiFi network

- Set the time the app must wait to lock your screen. This can be extremely handy for example when you are connected to an unstable network which causes reconnects on a regular basis. In that case you don't want your screen being locked/unlocked in a short amount of time. It is recommended to set the value to at least 10 seconds, but tests with different kind of devices show that values between 15 to 20 seconds are evaluated as more user friendly. But in the end, you can choose whatever fits you best

Permissions

The permissions for this app have been carefully selected and kept at an absolute minimum required level (e.g. to keep your PIN safe and secured on your device):

- Runs in the background and automatically starts when the device boots

- View network (e.g. WiFi) connection states. This permission does not allow the app to communicate using the network

- Set the PIN and lock the screen using the Device Administrator permission

Tips

- When connected to a trusted network, set the current lockscreen to 'swipe' or 'none' (if you want). This avoids showing the keypad when presenting the lockscreen, eventhough there is no lock active.

Notes

- The PIN is kept in a secure storage on your device and can only be accessed by the app. The PIN is only used by the app to lock/unlock your screen. Period. The minimum set of permissions do not allow the app to communicate with anything other than the user (through interaction).

- If you want to remove the app, you first have to disable the administrator permission. This can be done in the settings of the app.

- It is not recommended to change the PIN of your screen outside of the app or select a different lock screen. If you changed the PIN outside the app, you have to put the same PIN in the app.

- If you have an app installed/running that applies a password policy, then Trusted WiFi Networks might not work.

Known issues

- A few specific devices (e.g. Samsung Galaxy S1) incorrectly show that SD card encryption is enabled as a Device Administrator permission. This is device specific and is the responsibility of the manufacturer of the device. So I can not solve this, but to be clear: the app doesn't request this permission and also doesn't need it

- Android 5.0: when connecting to a trusted network, the lockscreen is not removed when another app has set a policy that specifies that the lockscreen must be protected by a password. The keypad is shown in that case, but you can just press enter on the keypad and it will pass. I am trying to look for a solution