Hide status bar with overlaying black bar

Question

I have written an Android 7.0 application which collects sensor data in the background (using a background service). While the sensor recording is running I would like to hide the status bar (i.e. the Wifi symbol, clock etc.).

I thought about adding a black bar over the status bar while the background service is running. How can this be done?

Answer 1

you may hide the status bar via setSystemUiVisibility()

View decorView = getWindow().getDecorView();
int uiOptions = View.SYSTEM_UI_FLAG_FULLSCREEN;
decorView.setSystemUiVisibility(uiOptions);

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edit Please disregard this answer as this will only work for foreground application. For background application, as far as my limited knowledge, there is no way to set System-wide UI invisible.