應用程序崩潰與：無法創建內螺紋處理程序尚未調用Looper.prepare（）

Question

我有一個的AsyncTask將調用

public static String getRequestURL(String urlName) { 
    String url = ""; 
    if(GetUserLocation.userLocation == null){ 
     GetUserLocation gul = new GetUserLocation(); 

     LocationResult lResult = new LocationResult() { 

      @Override 
      public void gotLocation(Location location) { 
       if(location != null) { 
        GetUserLocation.userLocation = location; 
       } 

      } 
     }; 

     gul.getLocation(NLocateApplication.context, lResult); 
     long timeOfLoad = Calendar.getInstance().getTimeInMillis(); 

     while(GetUserLocation.userLocation == null 
       && Calendar.getInstance().getTimeInMillis() - timeOfLoad < 30000) { 

     } 
     Log.d("ServiceHelper.getRequestURL", "userlocation NULL"); 
    } 

    url += ServiceHelpers.BASE_URL.toString() + urlName + "?" 
      + "lattitude=" + GetUserLocation.userLocation.getLatitude() 
      + "&longitude=" + GetUserLocation.userLocation.getLongitude() 
      + "&type=" + Build.MANUFACTURER.toUpperCase() + "-" + Build.MODEL.replaceAll("\\s", "_") 
      + "&uuid=" + NLocateApplication.UUID; 

    return url; 
} 

在doInBackground方法的方法。 GetUserLocation類將嘗試獲取用戶位置。但有時我得到Can't create handler inside thread that has not called Looper.prepare()錯誤和應用程序崩潰。

如何解決這個問題？任何幫助將不勝感激。

＃logcat的

java.lang.RuntimeException: An error occured while executing doInBackground() at android.os.AsyncTask$3.done(AsyncTask.java:299) at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273) at java.util.concurrent.FutureTask.setException(FutureTask.java:124) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307) at java.util.concurrent.FutureTask.run(FutureTask.java:137) at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:230) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569) at java.lang.Thread.run(Thread.java:856) Caused by: java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare() at android.os.Handler.<init>(Handler.java:121) at android.app.Activity.<init>(Activity.java:772) at com.nepways.nlocate.location.GetUserLocation.<init>(GetUserLocation.java:16) at com.nepways.nlocate.helpers.ServiceHelpers.getRequestURL(ServiceHelpers.java:60) at com.nepways.nlocate.tasks.LocationsTask.getDataFromService(LocationsTask.java:127) at com.nepways.nlocate.tasks.LocationsTask.doInBackground(LocationsTask.java:78) at com.nepways.nlocate.tasks.LocationsTask.doInBackground(LocationsTask.java:1) at android.os.AsyncTask$2.call(AsyncTask.java:287) at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305) ... 5 more

GetUserLocation.java

public class GetUserLocation { 

private static final long MINIMUM_DISTANCE_CHANGE_FOR_UPDATES = 1; 
private static final long MINIMUM_TIME_BETWEEN_UPDATES = 30000; 

Timer timer1; 

LocationManager locationManager = null; 
LocationResult locationResult; 
boolean gpsEnabled = false; 
boolean networkEnabled = false; 
public static Location userLocation = null; 

public boolean getLocation(Context context, LocationResult result) { 
    locationResult = result; 

    if (locationManager == null) { 
     locationManager = (LocationManager) context.getSystemService(Context.LOCATION_SERVICE); 
    } 

    // exceptions will be thrown if provider is not permitted. 
    try { 
     gpsEnabled = locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER); 
    } catch (Exception ex) { 

    } 

    try { 
     networkEnabled = locationManager.isProviderEnabled(LocationManager.NETWORK_PROVIDER); 
    } catch (Exception ex) { 
    } 

    // don't start listeners if no provider is enabled 
    if (!gpsEnabled && !networkEnabled) 
     return false; 

    if (gpsEnabled) { 
     locationManager.removeUpdates(locationListenerGps); 
     locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 
       MINIMUM_TIME_BETWEEN_UPDATES, 
       MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, 
       locationListenerGps); 
    } 

    if (networkEnabled) { 
     locationManager.removeUpdates(locationListenerNetwork); 
     locationManager.requestLocationUpdates(LocationManager.NETWORK_PROVIDER, 
       MINIMUM_TIME_BETWEEN_UPDATES, 
       MINIMUM_DISTANCE_CHANGE_FOR_UPDATES, 
       locationListenerNetwork); 
    } 

    timer1 = new Timer(); 
    timer1.schedule(new GetLastLocation(), 30000); 

    return true; 
} 

LocationListener locationListenerGps = new LocationListener() { 


    @Override 
    public void onLocationChanged(Location location) { 
     timer1.cancel(); 

     locationResult.gotLocation(location); 
     locationManager.removeUpdates(this); 
     locationManager.removeUpdates(locationListenerNetwork); 
    } 

    @Override 
    public void onProviderDisabled(String provider) { 
    } 

    @Override 
    public void onProviderEnabled(String provider) { 
    } 

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
    } 
}; 

LocationListener locationListenerNetwork = new LocationListener() { 
    @Override 
    public void onLocationChanged(Location location) { 
     timer1.cancel(); 

     locationResult.gotLocation(location); 
     locationManager.removeUpdates(this); 
     locationManager.removeUpdates(locationListenerGps); 
    } 

    @Override 
    public void onProviderDisabled(String provider) { 
    } 

    @Override 
    public void onProviderEnabled(String provider) { 
    } 

    @Override 
    public void onStatusChanged(String provider, int status, Bundle extras) { 
    } 
}; 

class GetLastLocation extends TimerTask { 
    @Override 
    public void run() { 

     locationManager.removeUpdates(locationListenerGps); 
     locationManager.removeUpdates(locationListenerNetwork); 

     Location networkLocation = null, gpsLocation = null; 
     if (gpsEnabled) { 
      //t = Calendar.getInstance().getTimeInMillis(); 
      gpsLocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); 
     } 

     if (networkEnabled) { 
      networkLocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER); 
     } 

     // if there are both values use the latest one 
     if (gpsLocation != null && networkLocation != null) { 

      if (gpsLocation.getTime() > networkLocation.getTime()) 
       locationResult.gotLocation(gpsLocation); 
      else 
       locationResult.gotLocation(networkLocation); 

      return; 
     } 

     if (gpsLocation != null) { 
      locationResult.gotLocation(gpsLocation); 
      return; 
     } 

     if (networkLocation != null) { 
      locationResult.gotLocation(networkLocation); 
      return; 
     } 

     locationResult.gotLocation(null); 
    } 
} 

public static abstract class LocationResult { 
    public abstract void gotLocation(Location location); 
} 

public void removeUpdates() { 
    if(timer1!=null) { 
     timer1.cancel(); 
    } 
    locationManager.removeUpdates(locationListenerGps); 
    locationManager.removeUpdates(locationListenerNetwork); 
    userLocation = null; 
    locationResult.gotLocation(null); 
} 

public Timer getTimer() { 
    return this.timer1; 
}} 

Answer 1

無法創建內螺紋處理程序尚未調用 Looper.prepare（）錯誤和應用程序崩潰。

最有可能你正在執行一些動作UI從非原產地（而不是UI）線程，但從背景/工作線程，這是不允許的。修復它應該可以解決你的問題。