Question

我正在尝试获取我的GPS位置，并使用textview（tv2）更新它位于活动的顶部。我的活动显示了摄像机视图并捕获GPS共存，并且必须在textview上写入它们。它也得到了指南针＆amp;加速度计数据，但现在不是问题。

有些事情是错误的，因为我无法捕获GPS数据...但我不明白什么是错的。如果我从头开始创建一个新项目并粘贴GPS位置请求代码，它就会得到正确的代码，但是在这个应用程序中，我无法获得GPS位置......使用相同的代码。出了什么问题？

对于cameraView我正在使用本指南中编写的默认cameraView代码：http://www.devx.com/wireless/article/42482/1954

这是我的主要课程：

public class AugmentedRealitySampleActivity extends Activity implements Runnable{
private CustomCameraView cv=null;
private TextView tv1;
private TextView tv2;
private TextView tv3;
private TextView tv4;
private TextView tv5;
private TextView tv6;
public static SensorManager sensorMan;

//variables para obtener mi posicion:
LocationManager mLocationManager;
Location mLocation;
MyLocationListener mLocationListener;
Location currentLocation = null;

private float direction; //compass
//private Location curLocation; //gps
public volatile float inclination; //accelerometer

double lat=-1;
double lon=-1;

public void onCreate(Bundle savedInstanceState) 
{   
       //try{
       super.onCreate(savedInstanceState);
       cv = new CustomCameraView(this.getApplicationContext());
       FrameLayout rl = new FrameLayout(this.getApplicationContext());
       LinearLayout ll= new LinearLayout(this.getApplicationContext());
       ll.setOrientation(LinearLayout.VERTICAL);

       setContentView(rl);
       rl.addView(cv);
       rl.addView(ll);
       //} catch(Exception e){}

       tv1=new TextView(getApplicationContext());
       tv2=new TextView(getApplicationContext());
       tv3=new TextView(getApplicationContext());
       tv4=new TextView(getApplicationContext());
       tv5=new TextView(getApplicationContext());
       tv6=new TextView(getApplicationContext());

       tv1.setBackgroundColor(Color.BLACK);
       tv2.setBackgroundColor(Color.BLACK);
       //tv3.setBackgroundColor(Color.BLACK);
       //tv4.setBackgroundColor(Color.BLACK);
       //tv5.setBackgroundColor(Color.BLACK);
       //tv6.setBackgroundColor(Color.BLACK);

       ll.addView(tv1);
       ll.addView(tv2);
       ll.addView(tv3);
       ll.addView(tv4);
       ll.addView(tv5);
       ll.addView(tv6);

       sensorMan = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
       sensorMan.registerListener(Compasslistener, sensorMan.getDefaultSensor(SensorManager.SENSOR_ORIENTATION), SensorManager.SENSOR_DELAY_FASTEST);
       sensorMan.registerListener(Accelerometerlistener, sensorMan.getDefaultSensor(Sensor.TYPE_ACCELEROMETER),  SensorManager.SENSOR_DELAY_FASTEST);

       //LocationManager locMan;
       //locMan = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
       //locMan.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100, 0, gpsListener);
       //getLatitude(); getLongitude(); bearingTo(); distanceTo();
       tv1.setText("Test1");
       tv2.setText("Test2");
       tv3.setText("Test3");
       tv4.setText("Test4"); 
       tv5.setText("Test5");
       tv6.setText("Test6");

       Thread thread = new Thread(this);
       thread.start();
}

////////////////////////////////////////////////
//COMPASS:
////////////////////////////////////////////////    
SensorEventListener Compasslistener = new SensorEventListener()
{           
    public void onAccuracyChanged(Sensor arg0, int accuracy){ }
    public void onSensorChanged(SensorEvent evt)
    {
        float vals[] = evt.values;   
        direction = vals[0];
        tv1.setText("Direction= " + direction);
    }
};

////////////////////////////////////////////////
//ACCELEROMETER:
////////////////////////////////////////////////    
private SensorEventListener Accelerometerlistener = new SensorEventListener()
{
    public volatile float direction = (float) 0;
    //public volatile float rollingZ = (float)0;
    public volatile float kFilteringFactor = (float)0.05;
    public float aboveOrBelow = (float)0;
    public void onAccuracyChanged(Sensor arg0, int arg1){}
    public void onSensorChanged(SensorEvent evt)
    {
        float vals[] = evt.values;

        if(evt.sensor.getType() == Sensor.TYPE_ORIENTATION)
        {
            float rawDirection = vals[0];
            direction =(float) ((rawDirection * kFilteringFactor) + (direction * (1.0 - kFilteringFactor)));
            inclination = (float) ((vals[2] * kFilteringFactor) + (inclination * (1.0 - kFilteringFactor)));

            if(aboveOrBelow > 0)
                inclination = inclination * -1;

            if(evt.sensor.getType() == Sensor.TYPE_ACCELEROMETER)
                aboveOrBelow = (float) ((vals[2] * kFilteringFactor) + (aboveOrBelow * (1.0 - kFilteringFactor)));

            tv3.setText("Inclination= " + inclination);
            tv4.setText("Direction2= " + direction);
            tv5.setText("kFilteringFactor= " + kFilteringFactor);
            tv6.setText("aboveOrBelow= " + aboveOrBelow);
      }
   }
};

////////////////////////////////////////////////////////////////////////
//Métodos del Hilo que obtiene la posicion GPS del usuario periodicamente.
///////////////////////////////////////////////////////////////////////
public void run() {
    mLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
    if (mLocationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) 
    {
        Looper.prepare();
        mLocationListener = new MyLocationListener();
        try{
            mLocationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 200, 0, mLocationListener);
        }catch(Exception e){}
        //try { 
        //  wait(100);  
        //}catch (InterruptedException e) {}
        Looper.loop();
    }
}
private class MyLocationListener implements LocationListener 
{
    public void onLocationChanged(Location loc) {
        if (loc != null) {
            try{
            currentLocation = loc;
            handler.sendEmptyMessage(0);
            }catch(Exception e){}
        }
    }
    public void onProviderDisabled(String provider) {      }
    public void onProviderEnabled(String provider) {      }
    public void onStatusChanged(String provider, int status, Bundle extras) {     }
}
private Handler handler = new Handler() {
    public void handleMessage(Message msg) {
        if (currentLocation!=null) 
        {
            lat=currentLocation.getLatitude();
            lon=currentLocation.getLongitude();
            if (lat==-1 && lon ==-1) /// si no existe ninguna posicion GPS anterior en el telefono, no hago nada
            {

            }
            else //// si existe alguna posicion anterior (es decir, si el GPS del telefono ha sido activado al menos alguna vez en su vida util)
            {  
                tv2.setText("Location= "+lat+" "+lon);
            }
        }
    }
};

}

Answer 1

您是否已获得AndroidManifest的许可？

像：

<android.permission.ACCESS_COARSE_LOCATION" />
<android.permission.ACCESS_FINE_LOCATION" />

或在android开发者文档中查看更多权限： http://developer.android.com/reference/android/Manifest.permission.html

Answer 2

我认为这是手机的某种错误，加速度计，指南针和GPS同时使用时无法正常工作

为什么我无法获得GPS位置？

2 个答案: