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java - Android后台服务错误: Can't create handler inside thread that has not called

转载 作者:行者123 更新时间:2023-12-01 18:35:31 25 4
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这是我的任务:我需要运行 2 个后台服务。一个用于通过 ksoap 将我的移动数据同步到服务器。另一个服务我需要将我的 GPS 位置发送到服务器。所以我写了这段代码。但是当我添加 gpsTimer 部分时,它在加载应用程序时出现以下错误。请帮助我解决这个问题。,或者告诉我任何其他方法来实现这种情况。

这是我的代码

public class BackgroundService extends Service {

private Timer timer;
private Timer gpsTimer;

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

public void onCreate() {
super.onCreate();
timer = new Timer("BackgroundServiceTimer");
timer.schedule(syncTask, 1000L, 60 * 1000L);

gpsTimer = new Timer("GPSServiceTimer");
gpsTimer.schedule(syncTaskGps, 1000L, 10 * 1000L);

}

public void onDestroy() {
super.onDestroy();
timer.cancel();
timer = null;

gpsTimer.cancel();
gpsTimer = null;
}

public void onLowMemory() {
super.onLowMemory();
stopService(new Intent(com.lk.lankabell.android.activity.BackgroundService.class.getName()));

}

private TimerTask syncTaskGps = new TimerTask() {
public void run() {
Log.w("GPS Tracker", "Tracker going to run"+new Date());
LocationManager mlocManager =(LocationManager)getSystemService(Context.LOCATION_SERVICE);
LocationListener mlocListener = new MyLocationListener();
mlocManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, 0, 0, mlocListener);
}
};
private TimerTask syncTask = new TimerTask() {
public void run() {
if (isOnline() == true) {
Log.w("Method 2", "setUpdateCardAcceptTag");
setUpdateCardAcceptTag();
Log.w("Method 3", "getCardBulkSerialData");
getCardBulkSerialData();
Log.w("Method 12", "updateStockDataFromRemote");
updateStockDataFromRemote();
Log.w("Method 5", "SetRemarksData");
SetRemarksData();
Log.w("Method 6", "SetCardSaleData");
SetCardSaleData();
Log.w("Method 7", "synchMerchants");
synchMerchants();
Log.w("Method 9", "getUpdatedCities");
getUpdatedCities();
Log.w("Method 10", "getNotifications");
getNotifications();
Log.w("Method 11", "getNextSerialDetails");
getNextSerialDetails();
Log.w("Method 12", "getNextSerialDetails");
//synchLocations();
Log.w("Method 13", "synchLocations");

}
}
};

这是我的错误:

java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

enter image description here

最佳答案

使用Handler代替Timer/TimerTask

public class MyService extends Service {
private Handler mTimer = new Handler();
private Runnable mTask = new Runnable() {
@Override
public void run() {
//DO SOMETHING HERE
mTimer.postDelayed(this, interval*1000L);
}
};

private int interval = 60; // 60 seconds

public void onCreate() {
mTimer.postDelayed(mTask, interval*1000L); //start the timer for the first time
}

public void onDestroy() {
if(mTimer != null) {
mTimer.removeCallbacks(mTask); //cancel the timer
}
}
}

通过使用Handler,你有一个优势,你可以随时重置间隔,例如首先你希望它每5秒运行一次,而不是用户决定每1秒运行一次,只需更改间隔变量并调用mTimer.postDelayed再次。

关于java - Android后台服务错误: Can't create handler inside thread that has not called,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22193259/

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