位置者地位GPS強制關閉

嗨，我開發了一款應用找到最好的位置，並將其短信到一個號碼。其工作正常與網絡位置，但是當我想定位與GPS或標準類它的成爲力量關閉！其如此友善的幫助我tnx。位置者地位GPS強制關閉

package ir.M410.toolkit; 

import android.app.Service; 
import android.content.Intent; 
import android.location.Criteria; 
import android.location.Location; 
import android.location.LocationListener; 
import android.location.LocationManager; 
import android.os.Bundle; 
import android.os.IBinder; 
import android.telephony.SmsManager; 
import android.util.Log; 



public class LocationFinder extends Service implements LocationListener{ 

double lat ,lon ; 
@Override 
public IBinder onBind(Intent arg0) { 
    return null; 
     } 

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    // We want this service to continue running until it is explicitly 
    // stopped, so return sticky. 


    LocationManager mlocationManager = (LocationManager)  getSystemService(LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 
    criteria.setAccuracy(Criteria.ACCURACY_FINE); 
    criteria.setPowerRequirement(Criteria.POWER_MEDIUM); 
    String locationprovider = mlocationManager.getBestProvider(criteria, true); 
    Location mlocation = mlocationManager.getLastKnownLocation(locationprovider); 


     lat = mlocation.getLatitude(); 
     lon = mlocation.getLongitude(); 

     Log.i("Geo_Location", "Latitude: " + lat + ", Longitude: " + lon); 

     SmsManager sms = SmsManager.getDefault(); 
     sms.sendTextMessage("+11231233213", null,"https://maps.google.com/maps?q="+lat+","+lon, null, null); 



     // SmsManager sms = SmsManager.getDefault(); 
    //sms.sendTextMessage(MainActivity.senderNum, null," "+"lat:"+lat+" "+"lon:"+lon, null, null); 
//stopSelf(); 
      return START_NOT_STICKY; 
} 

@Override 
public void onLocationChanged(Location location) { 
    // TODO Auto-generated method stub 

    lat= location.getLatitude(); 
    lon =location.getLongitude(); 

    Log.i("Geo_Location", "Latitude: " + lat + ", Longitude: " + lon); 
    // stopSelf(); 
} 

@Override 
public void onProviderDisabled(String provider) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onProviderEnabled(String provider) { 
    // TODO Auto-generated method stub 

} 

@Override 
public void onStatusChanged(String provider, int status, Bundle extras) { 
    // TODO Auto-generated method stub 

} 


@Override 
public void onDestroy() { 
    super.onDestroy(); 

} 
}

，這是我的清單：

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
package="ir.M410.toolkit" 
android:versionCode="1" 
android:versionName="1.0" > 

<uses-sdk 
    android:minSdkVersion="8" 
    android:targetSdkVersion="17" /> 

<uses-permission android:name="android.permission.RECEIVE_SMS" > 
</uses-permission> 
<uses-permission android:name="android.permission.READ_SMS" > 
</uses-permission> 
<uses-permission android:name="android.permission.SEND_SMS" > 
</uses-permission> 
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" > 
</uses-permission> 
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" > 
</uses-permission> 
<uses-permission android:name="android.permission.CALL_PHONE" /> 

<application 
    android:allowBackup="true" 
    android:icon="@drawable/ic_launcher" 
    android:label="@string/app_name" 
    android:theme="@style/AppTheme" > 
    <receiver android:name="ir.M410.toolkit.Broadcast_Receiver" > 
     <intent-filter android:priority="2147483647" > 
      <action android:name="android.intent.action.PHONE_STATE" /> 
      <action android:name="android.provider.Telephony.SMS_RECEIVED" /> 
      <action android:name="ir.M410.toolkit.android.action.broadcast" /> 
     </intent-filter> 
    </receiver> 

    <service android:name="ir.M410.toolkit.LocationFinder" /> 

    <activity 
     android:name="ir.M410.toolkit.PasswordCheck" 
     android:label="@string/app_name" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

      <category android:name="android.intent.category.LAUNCHER" /> 
     </intent-filter> 
    </activity> 
    <activity 
     android:name="ir.M410.toolkit.MainActivity" 
     android:label="@string/title_activity_main" 
     android:screenOrientation="portrait" > 
    </activity> 
    <activity 
     android:name="ir.M410.toolkit.Teturial" 
     android:label="@string/title_activity_teturial" > 
    </activity> 
    <activity 
     android:name="ir.M410.toolkit.CallDivertActivity" 
     android:label="@string/title_activity_call_divert" > 
    </activity> 
</application> 

</manifest>

[編輯]這裏是logcat的定義：

10-14 19:58:37.823: E/AndroidRuntime(2685): FATAL EXCEPTION: main 
10-14 19:58:37.823: E/AndroidRuntime(2685): java.lang.RuntimeException: Unable to start service [email protected] with Intent { cmp=ir.M410.toolkit/.LocationFinder }: java.lang.NullPointerException 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3260) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.app.ActivityThread.access$3600(ActivityThread.java:135) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2205) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.os.Handler.dispatchMessage(Handler.java:99) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.os.Looper.loop(Looper.java:143) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.app.ActivityThread.main(ActivityThread.java:4914) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at java.lang.reflect.Method.invokeNative(Native Method) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at java.lang.reflect.Method.invoke(Method.java:521) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at dalvik.system.NativeStart.main(Native Method) 
10-14 19:58:37.823: E/AndroidRuntime(2685): Caused by: java.lang.NullPointerException 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at ir.M410.toolkit.LocationFinder.onStartCommand(LocationFinder.java:38) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:3246) 
10-14 19:58:37.823: E/AndroidRuntime(2685):  ... 10 more

[編輯]代碼來檢查不能爲null：

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    // We want this service to continue running until it is explicitly 
    // stopped, so return sticky. 


    LocationManager mlocationManager = (LocationManager) getSystemService(LOCATION_SERVICE); 
    Criteria criteria = new Criteria(); 
    criteria.setAccuracy(Criteria.ACCURACY_FINE); 
    criteria.setPowerRequirement(Criteria.POWER_MEDIUM); 
    String locationprovider = mlocationManager.getBestProvider(criteria, true); 
    if(mlocationManager.getLastKnownLocation(locationprovider)!=null){ 
    Location mlocation = mlocationManager.getLastKnownLocation(locationprovider); 


     lat = mlocation.getLatitude(); 
     lon = mlocation.getLongitude(); 

     Log.i("Geo_Location", "Latitude: " + lat + ", Longitude: " + lon); 

     SmsManager sms = SmsManager.getDefault(); 
     sms.sendTextMessage("+11231233213", null,"https://maps.google.com/maps?q="+lat+","+lon, null, null); 

    }

和它的好，並沒有得到武力關閉但沒有收到數據，它始終爲空！

來源

2013-10-14 M410

什麼是堆棧跟蹤說 – tyczj

在onSTartCommand（）已知的位置，檢查它是否爲空。還提供輸出/堆棧跟蹤在logcat中 –

編輯我的職務，並添加logcat的 – M410

我有這樣的使用，你可以儘快的有效位置可以打開GPS和接收回調實現我自己的GPSTracker類的版本從http://www.androidhive.info/2012/07/android-gps-location-manager-tutorial/

。這可能需要一段時間，取決於設備的位置，但會提供更加精確和可靠的位置。

我的執行，你可以做這樣的事情：

private GPSTracker gps; 
private FirstFixListener firstFixListener; 
private LocationUpdateListener locationUpdateListener; 

private void sendGPStoSMS() { 
    gps = GPSTracker.getInstance(context); 
    firstFixListener = new MyFirstFixListener(); 
    locationUpdateListener = new MyLocationUpdateListener(); 
    gps.startUsingGPS(firstFixListener, locationUpdateListener); 

} 

private class MyFirstFixListener implements FirstFixListener { 

    @Override 
    public void onFirsFixChanged(boolean hasGPSfix) { 
     if (hasGPSfix == true) { 
      Location position = gps.getLocation(); 
      // send SMS with position 

      // stop the gps and unregister callbacks 
      gps.stopUsingGPS(firstFixListener, locationUpdateListener); 
     } 

    } 

} 

private class MyLocationUpdateListener implements LocationUpdateListener { 

    @Override 
    public void onLocationChanged(Location location) { 
     // hand you each new location from the GPS 
     // you do not need this as you only want to send a single position 

    } 

}

這裏是我的執行GPSTracker的：在使用前最後

public class GPSTracker extends Service implements LocationListener { 

private static final String TAG = "GPSTracker"; 

/** 
* Register to receive callback on first fix status 
* 
* @author Morten 
* 
*/ 
public interface FirstFixListener { 

    /** 
    * Is called whenever gps register a change in first-fix availability 
    * This is valuable to prevent sending invalid locations to the server. 
    * 
    * @param hasGPSfix 
    */ 
    public void onFirsFixChanged(boolean hasGPSfix); 
} 

/** 
* Register to receive all location updates 
* 
* @author Morten 
* 
*/ 
public interface LocationUpdateListener { 
    /** 
    * Is called every single time the GPS unit register a new location 
    * The location param will never be null, however, it can be outdated if hasGPSfix is not true. 
    * 
    * @param location 
    */ 
    public void onLocationChanged(Location location); 
} 

private Context mContext; 

// flag for GPS status 
private List<FirstFixListener> firstFixListeners; 
private List<LocationUpdateListener> locationUpdateListeners; 
boolean isGPSFix = false; 
boolean isGPSEnabled = false; 
private GPSFixListener gpsListener; 

// flag for GPS status 
boolean canGetLocation = false; 

Location location; // location 
double latitude; // latitude 
double longitude; // longitude 
long mLastLocationMillis; 

private boolean logLocationChanges; 

// Declaring a Location Manager 
protected LocationManager locationManager; 

/** removed again as we need multiple instances with different callbacks **/ 
private static GPSTracker instance; 

public static GPSTracker getInstance(Context context) { 
    if (instance != null) { 
     return instance; 
    } 
    return instance = new GPSTracker(context); 
} 

private GPSTracker(Context context) { 
    this.mContext = context; 
    gpsListener = new GPSFixListener(); 
    firstFixListeners = new ArrayList<GPSTracker.FirstFixListener>(); 
    locationUpdateListeners = new ArrayList<GPSTracker.LocationUpdateListener>(); 
} 

public boolean hasGPSFirstFix() { 
    return isGPSFix; 
} 

private void addFirstFixListener(FirstFixListener firstFixListener) { 
    this.firstFixListeners.add(firstFixListener); 
} 

private void addLocationUpdateListener(
     LocationUpdateListener locationUpdateListener) { 
    this.locationUpdateListeners.add(locationUpdateListener); 
} 

private void removeFirstFixListener(FirstFixListener firstFixListener) { 
    this.firstFixListeners.remove(firstFixListener); 
} 

private void removeLocationUpdateListener(
     LocationUpdateListener locationUpdateListener) { 
    this.locationUpdateListeners.remove(locationUpdateListener); 
} 

public void setLogLocationChanges(boolean logLocationChanges) { 
    this.logLocationChanges = logLocationChanges; 
} 

public Location getLocation() { 
    return location; 
} 

private Location startLocationListener() { 
    canGetLocation = false; 

    try { 
     locationManager = (LocationManager) mContext 
       .getSystemService(Service.LOCATION_SERVICE); 

     // getting GPS status 
     isGPSEnabled = locationManager 
       .isProviderEnabled(LocationManager.GPS_PROVIDER); 

     if (isGPSEnabled) { 
      if (location == null) { 
       locationManager.requestLocationUpdates(
         LocationManager.GPS_PROVIDER, 0, 0, this); 
       locationManager.addGpsStatusListener(gpsListener); 
       if (locationManager != null) { 
        location = locationManager 
          .getLastKnownLocation(LocationManager.GPS_PROVIDER); 
        if (location != null) { 
         latitude = location.getLatitude(); 
         longitude = location.getLongitude(); 
        } 
       } 
      } 
     } else { 
      showSettingsAlert(); 
     } 

    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

    return location; 
} 

public void stopUsingGPS(FirstFixListener firstFixListener, 
     LocationUpdateListener locationUpdateListener) { 
    if (firstFixListener != null) 
     removeFirstFixListener(firstFixListener); 
    if (locationUpdateListener != null) 
     removeLocationUpdateListener(locationUpdateListener); 

    stopUsingGPS(); 
} 

/** 
* Stop using GPS listener Calling this function will stop using GPS in your 
* app 
* */ 
public void stopUsingGPS() { 
    Log.d("DEBUG", "GPS stop"); 
    if (locationManager != null) { 
     locationManager.removeUpdates(GPSTracker.this); 
     location = null; 

     if (gpsListener != null) { 
      locationManager.removeGpsStatusListener(gpsListener); 
     } 

    } 
    isGPSFix = false; 
    location = null; 
} 

public void startUsingGPS(FirstFixListener firstFixListener, 
     LocationUpdateListener locationUpdateListener) { 
    Log.d("DEBUG", "GPS start"); 
    if (firstFixListener != null) 
     addFirstFixListener(firstFixListener); 
    if (locationUpdateListener != null) 
     addLocationUpdateListener(locationUpdateListener); 

    startLocationListener(); 
} 

/** 
* Function to get latitude 
* */ 
public double getLatitude() { 
    if (location != null) { 
     latitude = location.getLatitude(); 
    } else { 
     Log.e("GPSTracker", "getLatitude location is null"); 
    } 

    // return latitude 
    return latitude; 
} 

/** 
* Function to get longitude 
* */ 
public double getLongitude() { 
    if (location != null) { 
     longitude = location.getLongitude(); 
    } else { 
     Log.e("GPSTracker", "getLongitude location is null"); 
    } 

    // return longitude 
    return longitude; 
} 

/** 
* Function to check GPS/wifi enabled 
* 
* @return boolean 
* */ 
public boolean canGetLocation() { 
    return this.canGetLocation; 
} 

/** 
* Function to show settings alert dialog On pressing Settings button will 
* lauch Settings Options 
* */ 
public void showSettingsAlert() { 
    AlertDialog.Builder alertDialog = new AlertDialog.Builder(mContext); 

    // Setting Dialog Title 
    alertDialog.setTitle("GPS settings"); 

    // Setting Dialog Message 
    alertDialog 
      .setMessage("GPS is not enabled. Do you want to go to settings menu?"); 

    // On pressing Settings button 
    alertDialog.setPositiveButton("Settings", 
      new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int which) { 
        Intent intent = new Intent(
          Settings.ACTION_LOCATION_SOURCE_SETTINGS); 
        mContext.startActivity(intent); 
       } 
      }); 

    // on pressing cancel button 
    alertDialog.setNegativeButton("Cancel", 
      new DialogInterface.OnClickListener() { 
       public void onClick(DialogInterface dialog, int which) { 
        dialog.cancel(); 
       } 
      }); 

    // Showing Alert Message 
    alertDialog.show(); 
} 

@Override 
public void onLocationChanged(Location location) { 
    if (location == null) 
     return; 

    this.location = location; 



    mLastLocationMillis = SystemClock.elapsedRealtime(); 
    canGetLocation = true; 
    if (isGPSFix) { 


     if (locationUpdateListeners != null) { 
      for (LocationUpdateListener listener : locationUpdateListeners) { 
       listener.onLocationChanged(location); 
      } 
     } 
    } 

} 

@Override 
public void onProviderDisabled(String provider) { 
    canGetLocation = false; 
} 

@Override 
public void onProviderEnabled(String provider) { 

} 

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

@Override 
public IBinder onBind(Intent arg0) { 
    return null; 
} 

private boolean wasGPSFix = false; 

// http://stackoverflow.com/questions/2021176/how-can-i-check-the-current-status-of-the-gps-receiver 
// answer from soundmaven 
private class GPSFixListener implements GpsStatus.Listener { 
    public void onGpsStatusChanged(int event) { 
     switch (event) { 
     case GpsStatus.GPS_EVENT_SATELLITE_STATUS: 
      isGPSFix = (SystemClock.elapsedRealtime() - mLastLocationMillis) < 3000; 

      if (isGPSFix != wasGPSFix) { // only notify on changes 
       wasGPSFix = isGPSFix; 
       for (FirstFixListener listener : firstFixListeners) { 
        listener.onFirsFixChanged(isGPSFix); 
       } 
      } 

      break; 
     case GpsStatus.GPS_EVENT_FIRST_FIX: 
      // Do something. 



      break; 
     } 
    } 
} 
}

來源

2013-10-14 18:30:44 cYrixmorten

我使用的位置更新並解決它TNX – M410

您的歡迎，偉大的你得到它的工作:) – cYrixmorten

如何使用此代碼？ –

位置者地位GPS強制關閉

回答

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