因為專案用到推送功能，所以需求是知道使用者是否開啟了通知欄的許可權，並且提供滑動按鈕進行跳轉以便使用者進行關閉或者開啟。

1.獲取通知欄許可權是否開啟：

/**
 * 獲取通知欄許可權是否開啟
 * 
 */

public class NotificationsUtils {
   private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
   private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

   @SuppressLint
 
("NewApi")
   public static boolean isNotificationEnabled(Context context) {

      AppOpsManager mAppOps = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
      ApplicationInfo appInfo = context.getApplicationInfo();
      String pkg = context.getApplicationContext().getPackageName();
      int
 
 uid = appInfo.uid;

      Class appOpsClass = null;
      /* Context.APP_OPS_MANAGER */
      try {
         appOpsClass = Class.forName(AppOpsManager.class.getName());
         Method checkOpNoThrowMethod = appOpsClass.getMethod(CHECK_OP_NO_THROW, Integer.TYPE, Integer.TYPE,
               String.class);
         Field opPostNotificationValue = appOpsClass.getDeclaredField(OP_POST_NOTIFICATION);

         int
 
 value = (Integer) opPostNotificationValue.get(Integer.class);
         return ((Integer) checkOpNoThrowMethod.invoke(mAppOps, value, uid, pkg) == AppOpsManager.MODE_ALLOWED);

      } catch (ClassNotFoundException e) {
         e.printStackTrace();
      } catch (NoSuchMethodException e) {
         e.printStackTrace();
      } catch (NoSuchFieldException e) {
         e.printStackTrace();
      } catch (InvocationTargetException e) {
         e.printStackTrace();
      } catch (IllegalAccessException e) {
         e.printStackTrace();
      }
      return false;
   }
}

2.進入系統設定介面

protected void requestPermission(int requestCode) {
   // TODO Auto-generated method stub
   // 6.0以上系統才可以判斷許可權
   // 進入設定系統應用許可權介面
      Intent intent = new Intent(Settings.ACTION_SETTINGS);
      startActivity(intent)；
}