1、判断是否打开

NotificationManagerCompat notification = NotificationManagerCompat.from(this);boolean isEnabled = notification.areNotificationsEnabled();

2、跳转系统设置

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;}

跳转应用系统设置

public static final String SETTINGS_ACTION =        "android.settings.APPLICATION_DETAILS_SETTINGS";

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.BASE) {            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) {            Intent intent = new Intent()                    .setAction(SETTINGS_ACTION)                    .setData(Uri.fromParts("package",                            getApplicationContext().getPackageName(), null));            startActivity(intent);            return;        }