I am making a screen lock app. In this app when user listen call then screen turn off and screen lock activate due to proximity sensor.
I have done many tries with different angles but failed.
Now I want to disable proximity sensor with the help of code in my app.
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I need to detect whether lockScreen is on or off on android phone.
This is not exactly about lock type. Android Phone security settings allow user to set PIN or graphic pattern screen lock type. A lot of devices show lockScreen BEFORE user can enter PIN or pattern.
So we have three actions to-do to start work with launcher or apps:
Press screen turn on/off hardware button on device
Swipe on screen to go though lockscreen
enter unlock combination (pin or pattern)
Some devices don't show lockscreen so than we have:
Press screen turn on/off hardware button on device
enter unlock combination (pin or pattern)
lock screen
enter pattern screen
Often user can turn lockscreen on of off by choosing creen lock options. Theese options in most cases called None and Swipe
I have spent an hour to know out how to determine whether lockscreen is on or off using official android API but FAILed.
If there is no absolutely stable solution for all lockable android devices - so may be there possibility to determine if lockscreen is on (just 'on' - without 'off') on MOST devices.
is there a sensor in android to detect a tap on the device? I have a service and I want to detect when the user touches the phone. He can touch(tap) the screen, back or any other part of the device and it will trigger a function within my service. Is that possible? For example, if I have the device in my pocket, and I want my service to call a certain function when the user tap the phone from outside his pocket. Thanks.
You can use the accelerometer. The accelerometer detects a force on the device, and a tap would cause a force. The trick would be filtering out other forces, such as bouncing when walking.
I am trying to make an application to switch on the screen when the hand is placed close to proximity sensor. However, the proximity sensor shuts down as soon as the screen is switched off. How do I prevent this?
You should write a service that registers for sensor input and uses onSensorChanged() . This way you can still listen to the event when the screen is turned off and the activity is paused.
However in Marshmallow and Nougat you have doze mode, which means the service will most probably stop running after the screen is off for a long time. I think they didn't specify behaviour for sensor change in their documentation, I'd love to hear what happens.
It's possible to simulate, for instance, events for android accelerometer?
Imagine the following scenario:
I have an app that at some point, if detect a X value from accelerometer, show a dialog with a question to the UI.
I want to make a test for it. To do so, I want to simulate a shake with that X value programatically, and check if the dialog appears.
I already know Sensor Simulator, but there is a way to send a value for accelerometer or other sensor and receive that changes with SensorEventListener?
Thanks in advance,
It's impossible. Because sensor event is triggered by hardware, android system get the data from hardware and don't provide interface to change the data or to trigger an sensor event. So we can't simulate a sensor event programatically. Using Sensor Simulator, or you can change the source code of android framework.
i'm making a program that disables your wifi when you lock your screen
but i can't find an object the holds that kind of information (wether it's locked or not)
In most Android phones Wifi is turned off a few minutes after the screen is locked.
This setting can also be controlled by the user in Settings->Wireless Netowrks->WiFi->Advanced.
Anyway, if you want to tell when the screen is locked, register to receive the ACTION_SCREEN_OFF broadcast intent.