如何让我的应用程序永远运行，即使在后台也是如此

Question

我制作了一个具有语音识别功能的应用程序，所以当我按下主页按钮时它会停止录制，但我希望它也能在后台运行。我已经尝试过这段代码，但我不知道在你这里放什么。

public class YourService extends Service {

    private static final int NOTIF_ID = 1;
    private static final String NOTIF_CHANNEL_ID = "Channel_Id";

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

    @Override
    public int onStartCommand(Intent intent, int flags, int startId){

        // do your jobs here

        startForeground();

        return super.onStartCommand(intent, flags, startId);
    }

    private void startForeground() {
        Intent notificationIntent = new Intent(this, MainActivity.class);

        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                notificationIntent, 0);

        startForeground(NOTIF_ID, new NotificationCompat.Builder(this, 
                NOTIF_CHANNEL_ID) // don't forget create a notification channel first
                .setOngoing(true)
                .setSmallIcon(R.drawable.ic_notification)
                .setContentTitle(getString(R.string.app_name))
                .setContentText("Service is running background")
                .setContentIntent(pendingIntent)
                .build());         
    }
}

我必须把我的整个主要活动都放在这个里面还是我必须放什么？

Answer 1

我认为你应该在这里使用线程。例如，我想运行一个应用程序，并希望它在后台不断打印一些东西。它看起来像这样：

public class BackgroundProcess implements Runnable {

    public boolean resume;

    public void stop() {
        resume = false;
    }

    public BackgroundProcess() {
        resume = true;
    }

    // code that will be run as a thread must be inside the run() function;
    @Override
    public void run() {
        while(resume) {
            System.out.println("Are we there yet?");
        }
    }
}

public class MainApp {
    public static void main(String[] args) {
    BackgroundProcess bp = new BackgroundProcess();
    bp.start(); // starts the thread
    }
}

在 Java 中创建线程有两种方法。您可以阅读以下内容https://www.javatpoint.com/creating-thread