android应用获取通知栏权限

android应用获取手机是否有通知栏的权限：

package com.jibo.health.views;

import android.app.AppOpsManager;
import android.content.Context;
import android.content.pm.ApplicationInfo;

import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
*/
public class NotificationsUtils {

private static final String CHECK_OP_NO_THROW = "checkOpNoThrow";
private static final String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

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 = (int) opPostNotificationValue.get(Integer.class);

        return (
                (int) 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;
}

}