//检查系统是否关闭app应用的通知权限
private boolean isNotificationEnabled(Context context) {

    String CHECK_OP_NO_THROW = "checkOpNoThrow";
    String OP_POST_NOTIFICATION = "OP_POST_NOTIFICATION";

    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;
}

//跳转到app详情页面开启权限
public static final String SETTINGS_ACTION =
            "android.settings.APPLICATION_DETAILS_SETTINGS";
    private void goToSet(){
        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);//进入设置页面
            Intent intent = new Intent()
                    .setAction(SETTINGS_ACTION)
                    .setData(Uri.fromParts("package",
                            getApplicationContext().getPackageName(), null));
            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);
            Intent intent = new Intent()
                    .setAction(SETTINGS_ACTION)
                    .setData(Uri.fromParts("package",
                            getApplicationContext().getPackageName(), null));
            startActivity(intent);
            return;
        }
    }