屏幕亮度设置.docVIP

Android的屏幕亮度好像在2.1+的时候提供了自动调节的功能，所以，如果当开启自动调节功能的时候， 我们进行调节好像是没有一点作用的，这点让我很是无语，结果只有进行判断，看是否开启了屏幕亮度的自动调节功能。 /** ???? * 判断是否开启了自动亮度调节 ???? * ???? * @param aContext ???? * @return ???? */ ??? public static boolean isAutoBrightness(ContentResolver aContentResolver) { ??????? boolean automicBrightness = false; ??????? try { ??????????? automicBrightness = Settings.System.getInt(aContentResolver, ???????????????????Settings.System.SCREEN_BRIGHTNESS_MODE) == Settings.System.SCREEN_BRIGHTNESS_MODE_AUTOMATIC; ??????? } catch (SettingNotFoundException e) { ??????????? e.printStackTrace(); ??????? } ??????? return automicBrightness; ??? } 然后就是要觉得当前的亮度了，这个就比较纠结了： /** ???? * 获取屏幕的亮度 ???? * ???? * @param activity ???? * @return ???? */ ??? public static int getScreenBrightness(Activity activity) { ??????? int nowBrightnessValue = 0; ??????? ContentResolver resolver = activity.getContentResolver(); ??????? try { ??????????? nowBrightnessValue = android.provider.Settings.System.getInt( ??????????????????? resolver, Settings.System.SCREEN_BRIGHTNESS); ??????? } catch (Exception e) { ??????????? e.printStackTrace(); ??????? } ??????? return nowBrightnessValue; ??? } 那如何修改屏幕的亮度呢？ /** ???? * 设置亮度 ???? * ???? * @param activity ???? * @param brightness ???? */ ??? public static void setBrightness(Activity activity, int brightness) { ??????? // Settings.System.putInt(activity.getContentResolver(), ??????? // Settings.System.SCREEN_BRIGHTNESS_MODE, ??????? // Settings.System.SCREEN_BRIGHTNESS_MODE_MANUAL); ??????? WindowManager.LayoutParams lp = activity.getWindow().getAttributes(); ??????? lp.screenBrightness = Float.valueOf(brightness) * (1f / 255f); ??????? activity.getWindow().setAttributes(lp); ??? } 那么，能设置了，但是为什么还是会出现，设置了，没反映呢？ 嘿嘿，那是因为，开启了自动调节功能了，那如何关闭呢？这才是最重要的： /** ???? * 停止自动亮度调节 ???? * ???? * @param activity ???? */ ??? public static void stopAutoBrightness(Activity activity) { ??????? Settings.System.put