Android应用获取通知栏权限是否开启--以及跳转到系统设置界面

1.获取通知栏权限是否开启：

/** * 获取通知栏权限是否开启 * */

    /**
     * 获取通知栏权限是否开启
     *
     */

    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.进入系统设置界面

protected void requestPermission(int requestCode) {
   // TODO Auto-generated method stub
   // 6.0以上系统才可以判断权限

   if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.BASE) {
      // 进入设置系统应用权限界面
      Intent intent = new Intent(Settings.ACTION_SETTINGS);
      startActivity(intent);
      return;
   } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {// 运行系统在5.x环境使用
      // 进入设置系统应用权限界面
      Intent intent = new Intent(Settings.ACTION_SETTINGS);
      startActivity(intent);
      return;
   }
   return;
}