How to turn on and off the screen using adb command?

Question

I use KEYCODE_POWER to turn my root phone on and off. The bellow command is used in both cases and turns off the screen.

adb shell input keyevent KEYCODE_POWER

However, I want to use it in some cases: turn it on and off. I have two functions: turning functions on and off. If the screen is off and I call the enable function, it will turn on the screen. if the screen is already on, the enable function will do nothing. Otherwise, if the screen is on, I will call the shutdown function and it will turn off.

I tried to check the status of the screen, but it does not work. In fact, updating the state of the screen is so slow compared to processing the phone. I also use another method, but these methods make the screen wake up without sleep.

final Window win = getWindow();
    win.addFlags( WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED |
            WindowManager.LayoutParams.FLAG_DISMISS_KEYGUARD |
            WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON |
            WindowManager.LayoutParams.FLAG_TURN_SCREEN_ON |
            WindowManager.LayoutParams.FLAG_ALLOW_LOCK_WHILE_SCREEN_ON ); 

The second way:

PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.SCREEN_BRIGHT_WAKE_LOCK | PowerManager.ACQUIRE_CAUSES_WAKEUP, "tag");
wl.acquire();

Answer 1

- adb 26

26 - .

: http://adbshell.com/commands

Answer 2

input_method - adb shell dumpsys input_method.
4.x, mScreenOn.
5 , mInteractive mActive.

Answer 3

script / . script:

result="$(adb shell dumpsys input_method | grep -c "mScreenOn=true")"

if [ "$result" == 1 ]; then
    echo "Screen is already on."

else
    echo "Turning screen on."
    adb shell input keyevent 26
fi