Avoiding the removal from the memory of an Android application.

If an application is closed it will not be providing the functionalities it was designed for. It is possible that the application was removed to clean the memory. Depending the model of your telephone there are diferent methods to prevent the application to be removed from the memory. The most common is modify the "App battery usage" section of the settings of your telephone for this application. In this section there are commonly three options "Unrestricted", "Optimized" and "Restricted", select the "Unrestricted" option, sometimes this will be enough to make application work appropiately. If an error message continues appearing, there are some models which provide a way to "lock" an application on the memory, this is activated in the window select list (press the square on the button of the screen), above the application there will be the image of a lock maybe inside of a menu, if you close the lock the application will not be closed and it will be providing the content for the device.