Add a Screen Wake‑Up Reminder to UiAutomator Tests

When running UiAutomator tests, it is easy to forget to check the test report after execution. To avoid this, the author proposes a simple reminder that uses screen on/off signals instead of sound or vibration, which are not available in UiAutomator 1 without an auxiliary APK.

Screen‑based reminder implementation

public void warningTester() throws RemoteException {
    UiDevice.getInstance().sleep(); // turn screen off
    sleep(1200); // pause briefly
    if (UiDevice.getInstance().isScreenOn()) { // screen is already on
        return; // exit if no reminder needed
    } else {
        UiDevice.getInstance().wakeUp(); // wake the screen
        warningTester(); // recurse to ensure reminder
    }
}

The method first forces the device to sleep, waits a short period, then checks whether the screen is on. If the screen remains off, it wakes the device and recursively calls itself, creating a visible reminder for the tester.

Optional screen‑brightness adjustment

public static void setScreenLightTo250() {
    execCmd("adb -s " + NEXUS5DEVICESID + " shell settings put system screen_brightness 250");
}

This helper method demonstrates how to set the screen brightness to a specific level (value 250) using an ADB shell command, which can be combined with the reminder logic to ensure the screen is visible after waking.