Signed-off-by: rtc <rtc@qq.com>

src/Notes-master/src/net/micode/notes/ui/AlarmAlertActivity.java

@@ -91,10 +91,13 @@ public class AlarmAlertActivity extends Activity implements OnClickListener, OnD
             finish();// 结束当前Activity
         }
     }
-
+    /**
+     * 判断屏幕是否处于亮状态。
+     * @return true表示屏幕处于亮屏状态，false表示屏幕处于关闭状态
+     */
     private boolean isScreenOn() {
         PowerManager pm = (PowerManager) getSystemService(Context.POWER_SERVICE);
-        return pm.isScreenOn();
+        return pm.isScreenOn(); // 返回屏幕是否处于亮屏状态
     }
 
     private void playAlarmSound() {