如果API级别为4，如何检测屏幕是打开还是关闭？

Question

I am wondering to know how to detect screen dim or brightness on Android 1.6.

I've found a solution on API Level 7. It is easy to develop :

PowerManager pm = (PowerManager)
getSystemService(Context.POWER_SERVICE);
boolean isScreenOn = pm.isScreenOn();

But I need a solution for Android 1.x.

Can you suggest me ?

Thanks.

Answer 1

对于屏幕开关状态，您可以尝试使用ACTION_SCREEN_ON和ACTION_SCREEN_OFF Intent ，如本博客文章所示： http ： //thinkandroid.wordpress.com/2010/01/24/handling-screen-off-and-screen-上意图/

Answer 2

The approach with the ACTION_SCREEN_ON did not work for me. After some different solutions this code finally solved the problem for me:

/**
 * Is the screen of the device on.
 * @param context the context
 * @return true when (at least one) screen is on
 */
public boolean isScreenOn(Context context) {
    if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT_WATCH) {
        DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
        boolean screenOn = false;
        for (Display display : dm.getDisplays()) {
            if (display.getState() != Display.STATE_OFF) {
                screenOn = true;
            }
        }
        return screenOn;
    } else {
        PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
        //noinspection deprecation
        return pm.isScreenOn();
    }
}