Android -如何通过编程设置FCM发送的未来推送通知的通知声音

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

<application ...>
    ...
    <meta-data
        android:name="com.google.firebase.messaging.default_notification_channel_id"
        android:value="@string/default_notification_channel_id" />
    ...
</application>

<string name="default_notification_channel_id">default_channel_id</string>

import android.media.RingtoneManager;
import android.net.Uri;

...

// 获取自定义通知声音的URI
Uri soundUri = Uri.parse("android.resource://" + getPackageName() + "/raw/notification_sound");

// 设置通知声音
NotificationCompat.Builder builder = new NotificationCompat.Builder(this, getString(R.string.default_notification_channel_id))
        .setSound(soundUri, RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION));