どのように私は<code>App</code>を作成してい

Question

アンドロイド

でGoogleマップ上の現在の位置と現在位置マーカを更新します。私は、私は、ユーザーの現在の場所で実行する必要があります別のロケーションこの現在のマーカーに一つの場所を移動するとGoogle Mapにcurrent locationで私current location markerを更新したいです。

...教えてしなさい、私は別の場所にある場所を移動すると、私の現在のマーカーが現在の場所に移動する必要があります

public class MainActivity extends AppCompatActivity implements OnMapReadyCallback, ConnectionCallbacks, OnConnectionFailedListener,LocationListener { 

GoogleMap mMap; 
SupportMapFragment mFragment; 
GoogleApiClient mGoogleApiClient; 
LatLng latLng; 
Marker CurrentMarker; 
LocationRequest mLocationRequest; 
Location mLastLocation; 
boolean firstRun = true; 
private Boolean exit = false; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    /* Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar);*/ 

     if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) { 
      checkLocationPermission(); 
     } 

     mFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map); 
     mFragment.getMapAsync(this); 
} 

//for location permission marshmalow 
public static final int MY_PERMISSIONS_REQUEST_LOCATION = 99; 
public boolean checkLocationPermission() { 
    if(ContextCompat.checkSelfPermission(this,Manifest.permission.ACCESS_FINE_LOCATION) 
      != PackageManager.PERMISSION_GRANTED){ 

     if(ActivityCompat.shouldShowRequestPermissionRationale(this, 
       Manifest.permission.ACCESS_FINE_LOCATION)){ 

      ActivityCompat.requestPermissions(this, 
        new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 
        MY_PERMISSIONS_REQUEST_LOCATION); 
     }else { 
      ActivityCompat.requestPermissions(this, 
        new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, 
        MY_PERMISSIONS_REQUEST_LOCATION); 
     } 
     return false; 
    }else{ 
     return true; 
    } 

} 

@Override 
public void onConnectionFailed(ConnectionResult connectionResult) { 
    Toast.makeText(this,"onConnectionFailed",Toast.LENGTH_SHORT).show(); 

} 

@Override 
public void onMapReady(GoogleMap googleMap) { 
    mMap = googleMap; 
    mMap.getUiSettings().setMyLocationButtonEnabled(false); 

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.M){ 
     if (ContextCompat.checkSelfPermission(this, 
       Manifest.permission.ACCESS_FINE_LOCATION) 
       ==PackageManager.PERMISSION_GRANTED){ 
      buildGoogleApiClient(); 
      mMap.setMyLocationEnabled(true); 

     } 
    } 
    else { 
     buildGoogleApiClient(); 
     mMap.setMyLocationEnabled(true); 
    } 

} 

protected synchronized void buildGoogleApiClient() { 
    mGoogleApiClient = new GoogleApiClient.Builder(this) 
      .addConnectionCallbacks(this) 
      .addOnConnectionFailedListener(this) 
      .addApi(LocationServices.API) 
      .build(); 
    mGoogleApiClient.connect(); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.menu_main, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 

    } 

    return super.onOptionsItemSelected(item); 
} 

@Override 
public void onConnected(Bundle bundle) { 

    mLocationRequest = new LocationRequest(); 
    // mLocationRequest.setInterval(1000); 
    // mLocationRequest.setFastestInterval(1000); 
    mLocationRequest.setPriority(LocationRequest.PRIORITY_BALANCED_POWER_ACCURACY); 

    if (ContextCompat.checkSelfPermission(this, 
      Manifest.permission.ACCESS_FINE_LOCATION)==PackageManager.PERMISSION_GRANTED){ 
     LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient, mLocationRequest,this); 
    } 

} 

@Override 
public void onConnectionSuspended(int i) { 
    Toast.makeText(this,"onConnectionSuspended",Toast.LENGTH_SHORT).show(); 

} 

@Override 
public void onLocationChanged(Location location) { 
    mLastLocation = location; 
    if(CurrentMarker != null){ 
     CurrentMarker.remove(); 
    } 

    LatLng latLng = new LatLng(location.getLatitude(),location.getLongitude()); 
    MarkerOptions markerOption = new MarkerOptions(); 
    markerOption.position(latLng); 
    markerOption.title("Current Position"); 
    markerOption.icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_MAGENTA)); 
    CurrentMarker = mMap.addMarker(markerOption); 
    Toast.makeText(this,"Location changed",Toast.LENGTH_SHORT).show(); 
    CameraPosition cameraPosition = new CameraPosition.Builder().target(latLng).zoom(13).build(); 
    mMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition)); 


    if(mGoogleApiClient != null){ 
     LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient,this); 
    } 
} 

// handle pemission after the allow the location of app.. 

@Override 
public void onRequestPermissionsResult(int requestCode, 
             String permissions[], int[] grantResult){ 
    switch (requestCode){ 
     case MY_PERMISSIONS_REQUEST_LOCATION: { 

      if(grantResult.length > 0 
        && grantResult[0] == PackageManager.PERMISSION_GRANTED){ 
       if(ContextCompat.checkSelfPermission(this, 
         Manifest.permission.ACCESS_FINE_LOCATION) 
         == PackageManager.PERMISSION_GRANTED) { 
        if(mGoogleApiClient == null){ 
         buildGoogleApiClient(); 
        } 
        mMap.setMyLocationEnabled(true); 
       } 

      }else { 
       Toast.makeText(this, "permisison denied", Toast.LENGTH_LONG).show(); 
      } 
      return; 
     } 
    } 
} 
} 

...私の次のソースコードを使用して、これを更新する方法を教えてください

おかげ

Answer 1

クリアマップ毎時間と場所は、各time.Tryを変更した場合、これは

@Override 
public void onLocationChanged(Location location) { 

    map.clear(); 

    MarkerOptions mp = new MarkerOptions(); 

    mp.position(new LatLng(location.getLatitude(), location.getLongitude())); 

    mp.title("my position"); 

    map.addMarker(mp); 

    map.animateCamera(CameraUpdateFactory.newLatLngZoom(
    new LatLng(location.getLatitude(), location.getLongitude()), 16)); 

    } 

をコード - 新しいマーカーを追加

Answer 2

次のように試してみてください。）

private class Mylocationlistener implements LocationListener { 

    private boolean zoomed = false; 
    private boolean firstPass = true; 

    @Override 
    public void onLocationChanged(Location location) { 

    if (location != null) { 
     // ---Get current location latitude, longitude--- 

     Log.d("LOCATION CHANGED", location.getLatitude() + ""); 
     Log.d("LOCATION CHANGED", location.getLongitude() + ""); 
     currentLocation = new LatLng(location.getLatitude(), location.getLongitude()); 
     currentLatLng = new LatLng(location.getLatitude(), location.getLongitude()); 
     Marker currentLocationMarker = mMap.addMarker(new MarkerOptions().position(currentLocation).title("Current Location")); 
     // Move the camera instantly to hamburg with a zoom of 15. 
     mMap.moveCamera(CameraUpdateFactory.newLatLngZoom(currentLatLng, 15)); 
     // Zoom in, animating the camera. 
     if (!zoomed) { 
      mMap.animateCamera(CameraUpdateFactory.zoomTo(12), 2000, null); 
      zoomed = true; 
     }          
     if (!firstPass){ 
      currentLocationMarker.remove(); 
     } 
     firstPass = false; 
     Toast.makeText(MapViewActivity.this,"Latitude = "+ 
       location.getLatitude() + "" +"Longitude = "+ location.getLongitude(), 
       Toast.LENGTH_LONG).show(); 

    } 
} 

ORこの

MarkerOptions a = new MarkerOptions() 
a.position(LatLng); 
Marker m = map.addMarker(a); 
m.setPosition(LatLng);