AndroidApp/ForegroundService.java

package com.example.myapplication.Service;

import android.app.Notification;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.Service;
import android.content.Intent;
import android.os.Build;
import android.os.IBinder;

import androidx.annotation.Nullable;
import androidx.core.app.NotificationCompat;

import com.example.myapplication.R;

public class ForegroundService extends Service {
    @Override
    public void onCreate() {
        super.onCreate();
        startForeground(1, createNotification());
    }

    @Nullable
    @Override
    public IBinder onBind(Intent intent) {
        return null;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        return START_STICKY;
    }



    private Notification createNotification() {
        NotificationChannel channel = null;
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
            channel = new NotificationChannel(
                    "channel_id",
                    "Foreground Service",
                    NotificationManager.IMPORTANCE_LOW
            );
            NotificationManager manager = getSystemService(NotificationManager.class);
            manager.createNotificationChannel(channel);
        }

        return new NotificationCompat.Builder(this, "channel_id")
                .setContentTitle("录音服务运行中")
                .setContentText("悬浮球正在运行")
                .setSmallIcon(R.drawable.ic_mic_off)
                .build();
    }
}