4.4以下并没有提过从app跳转到应用通知设置页面的Action，可考虑跳转到应用详情页面,下面是直接跳转到应用通知设置的代码：

if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {

Intent intent = new Intent();

intent.setAction("android.settings.APP_NOTIFICATION_SETTINGS");

intent.putExtra("app_package", getActivity().getPackageName());

intent.putExtra("app_uid", getActivity().getApplicationInfo().uid);

startActivity(intent);

} else if (android.os.Build.VERSION.SDK_INT == Build.VERSION_CODES.KITKAT) {

Intent intent = new Intent();

intent.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);

intent.addCategory(Intent.CATEGORY_DEFAULT);

intent.setData(Uri.parse("package:" + getActivity().getPackageName()));

startActivity(intent);

}

跳转到应用详情页面的代码如下：

Intent localIntent = new Intent();

localIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

if (Build.VERSION.SDK_INT >= 9) {

localIntent.setAction("android.settings.APPLICATION_DETAILS_SETTINGS");

localIntent.setData(Uri.fromParts("package", getActivity().getPackageName(), null));

} else if (Build.VERSION.SDK_INT <= 8) {

localIntent.setAction(Intent.ACTION_VIEW);

localIntent.setClassName("com.android.settings", "com.android.settings.InstalledAppDetails");

localIntent.putExtra("com.android.settings.ApplicationPkgName", getActivity().getPackageName());

}

startActivity(localIntent);

对于检测app是否开启通知，同样是针对4.4以上的系统才有效:

NotificationManagerCompat manager = NotificationManagerCompat.from(App.getInstance().getContext());

boolean isOpened = manager.areNotificationsEnabled();

4.4以下调用该方法并不会出错，只是全部返回true,默认开启状态