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我们正在创建内部应用程序，该应用程序需要具有不可杀死或非常长的 websocket 连接。我怎样才能做到这一点？我让它在前台服务中工作，禁用电池优化等，但它似乎不起作用。我尝试了所有标准选项。

命令adb shell dumpsys deviceidle whitelist +PACKAGE 似乎也没有帮助。

生根手机并将应用程序设置为系统应用程序有帮助吗？是否有企业自定义 ROM 可以控制电池优化和其他内容？

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1 回答 1

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您应该使用带有部分唤醒锁的前台服务，以防止手机进入休眠状态。下面是一个实现唤醒锁的前台服务类示例：

public class ICService extends Service {
    
    private static final int ID = 1;                        // The id of the notification
    
    private NotificationCompat.Builder builder;
    private NotificationManager mNotificationManager;
    private PowerManager.WakeLock wakeLock;                 // PARTIAL_WAKELOCK
    
    /**
     * Returns the instance of the service
     */
    public class LocalBinder extends Binder {
        public ICService getServiceInstance(){
            return ICService.this;
        }
    }
    private final IBinder mBinder = new LocalBinder();      // IBinder
    
    @Override
    public void onCreate() {
        super.onCreate();
        // PARTIAL_WAKELOCK
        PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
        wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK,"INSERT_YOUR_APP_NAME:wakelock");
    }
    
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        startForeground(ID, getNotification());
        return START_NOT_STICKY;
    }
    
    @SuppressLint("WakelockTimeout")
    @Override
    public IBinder onBind(Intent intent) {
        if (wakeLock != null && !wakeLock.isHeld()) {
            wakeLock.acquire();
        }
        return mBinder;
    }
    
    @Override
    public void onDestroy() {
        // PARTIAL_WAKELOCK
        if (wakeLock != null && wakeLock.isHeld()) {
            wakeLock.release();
        }
        super.onDestroy();
    }

    private Notification getNotification() {
        final String CHANNEL_ID = "YOUR_SERVICE_CHANNEL";

        builder = new NotificationCompat.Builder(this, CHANNEL_ID);
        //builder.setSmallIcon(R.drawable.ic_notification_24dp)
        builder.setSmallIcon(R.mipmap.YOUR_RESOURCE_ICON)
            .setColor(getResources().getColor(R.color.colorPrimaryLight))
            .setContentTitle(getString(R.string.app_name))
            .setShowWhen(false)
            .setPriority(NotificationCompat.PRIORITY_LOW)
            .setCategory(NotificationCompat.CATEGORY_SERVICE)
            .setOngoing(true)
            .setVisibility(NotificationCompat.VISIBILITY_PUBLIC)
            .setContentText(composeContentText());

        final Intent startIntent = new Intent(getApplicationContext(), ICActivity.class);
        startIntent.setAction(Intent.ACTION_MAIN);
        startIntent.addCategory(Intent.CATEGORY_LAUNCHER);
        startIntent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT);
        PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 1, startIntent, 0);
        builder.setContentIntent(contentIntent);
        return builder.build();
    }
}

显然，您还必须为您的应用禁用电池优化。您可以在此处浏览此服务的实际工作示例（但用于 GPS）。

于 2021-09-27T13:07:14.463 回答