Question

在我的mapview中，在SingleTapUp中使用了geocding。每当使用mapview的缩放控件时，也会调用singleTapUp。任何克服这种情况的建议。

我的主要方法中的代码

 public static TextView info;
 private MapController mapController;
private MapView mapView;
public LocationManager orgManager;
private MyOverlays itemizedoverlay, blackmarker;
public boolean gps_enabled = false;
public boolean network_enabled = false;
public Criteria c;
public String bestProvider;

public double orginLongitude, orginLatitude, destLongtitude, destLatitude,
currLatitude, currLongtitude, lat, lon;
public boolean isLongPress= false, GPSfix = false;

Location originLocation = new Location("source");
Location currLocation = new Location("current");
Location destinationLocation = new Location("destination");
Location fixlocation= new Location("fix");

NotificationManager nm;
Vibrator v;
MediaPlayer mp = new MediaPlayer();

private TextToSpeech myTTS;
private int MY_DATA_CHECK_CODE = 0;
private List<Overlay> mapOverlays;
private Projection projection;

GestureDetector gestureScanner;
long lastGesture = System.currentTimeMillis();

GeoPoint markerPoint = null;
private int count = 0;
MyLocationOverlay mo;

public GeoPoint source;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.map_layout);

    info = (TextView) findViewById(R.id.infopane);
    mapView = (MapView) findViewById(R.id.mapView);
    //Button myloc = (Button)findViewById(R.id.myloc);

    info.setText("Please Tap on the Map");

    orgManager = (LocationManager) this
            .getSystemService(Context.LOCATION_SERVICE);

    mapView.setBuiltInZoomControls(true);
    mapView.setSatellite(true);
    markerPoint = null;
    mapController = mapView.getController();
    mapController.setZoom(16); // Zoom 1 is world view
    mapView.invalidate();

    mo = new MyLocationOverlay(MapClass.this, mapView);
    mapView.getOverlays().add(mo);

    mapOverlays = mapView.getOverlays();
    projection = mapView.getProjection();

    Drawable drawable = this.getResources()
            .getDrawable(R.drawable.mark_red);
    Drawable black_marker = this.getResources().getDrawable(
            R.drawable.marker_black);
    itemizedoverlay = new MyOverlays(drawable);
    blackmarker = new MyOverlays(black_marker);


    try {
        gps_enabled = orgManager.isProviderEnabled(LocationManager.GPS_PROVIDER);
        Log.i("success", "Gps:" + String.valueOf(gps_enabled)+ "N/w:" + String.valueOf(network_enabled) );
    } catch (Exception ex) {

        Log.i("sample", "sample");
    }

    if (!gps_enabled) {
        Log.i("failure", "Gps:" + String.valueOf(gps_enabled)+ "N/W:" + String.valueOf(network_enabled) );
        final AlertDialog.Builder builder = new AlertDialog.Builder(MapClass.this);
        builder.setTitle("Attention!");
        builder.setMessage("Sorry, location is not determined. Please open app after enabling GPS & wireless networks").setCancelable(false).setPositiveButton("OK", new OnClickListener() {

            public void onClick(DialogInterface dialog, int which) {
                // TODO Auto-generated method stub
                startActivity(new Intent(
                        android.provider.Settings.ACTION_LOCATION_SOURCE_SETTINGS));
                finish();

            }
        });

        AlertDialog alert = builder.create();  
        alert.show();  
    }



    if(gps_enabled){

        orgManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, this);
        fixlocation = orgManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);

        Log.i("fix", String.valueOf(fixlocation.getLatitude() + fixlocation.getLongitude()));

        if (fixlocation!=null){
            originLocation.setLatitude(fixlocation.getLatitude());
            originLocation.setLongitude(fixlocation.getLongitude());
            Log.i("origin fix", String.valueOf(originLocation.getLatitude() + originLocation.getLongitude()));
            GPSfix = true;
        }else Toast.makeText(MapClass.this, "", Toast.LENGTH_SHORT).show(); 
    }

    if (GPSfix) {

        // double a = originLocation.getLatitude();
        // double b = originLocation.getLongitude();

        source = new GeoPoint(
                (int) ((fixlocation.getLatitude()) * 1E6),
                (int) ((fixlocation.getLongitude()) * 1E6));
        mapController.animateTo(source);
        mapView.getMapCenter();
        createMarker();
        Toast.makeText( MapClass.this," Source GPS Values Latitude: "
                + fixlocation.getLatitude() + " Longitude: "
                + fixlocation.getLongitude(), Toast.LENGTH_SHORT).show();

    }
    else Toast.makeText(MapClass.this, "Wait for GPS", Toast.LENGTH_SHORT).show();

    gestureScanner = new GestureDetector(this, this);


}

手势扫描程序方法中的代码。

onLongPress

@Override
public void onLongPress(final MotionEvent e) {
    // TODO Auto-generated method stuMapClass Toast.makeText(MapClass.this,
    // "LongPress", Toast.LENGTH_SHORT)

    AlertDialog.Builder alertDialog = new AlertDialog.Builder(MapClass.this);

    // Setting Dialog Title
    alertDialog.setTitle("Alert!!");

    // Setting Dialog Message
    alertDialog.setMessage("Do you want to select this as destination");

    // Setting Positive "Yes" Button
    alertDialog.setPositiveButton("YES",
            new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            // Write your code here to execute after dialog

            String add = "";

            GeoPoint geopoint = mapView.getProjection().fromPixels(
                    (int) e.getX(), (int) e.getY());
            // latitude
            lat = geopoint.getLatitudeE6() / 1E6;
            // longitude
            lon = geopoint.getLongitudeE6() / 1E6;

            Geocoder geoCoder = new Geocoder(getBaseContext(),
                    Locale.getDefault());
            try {
                List<Address> addresses = geoCoder.getFromLocation(
                        geopoint.getLatitudeE6() / 1E6,
                        geopoint.getLongitudeE6() / 1E6, 1);

                if (addresses.size() > 0) {
                    for (int i = 0; i < addresses.get(0)
                            .getMaxAddressLineIndex(); i++)
                        add += addresses.get(0).getAddressLine(i)
                        + "\n";
                }

                Toast.makeText(getBaseContext(), add,
                        Toast.LENGTH_SHORT).show();
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }

            mapOverlays.add(new MyOverlay((originLocation
                    .getLatitude()),
                    (originLocation.getLongitude()), lat, lon));

            destinationLocation.setLatitude(lat);
            destinationLocation.setLongitude(lon);

            String distance = Float.toString((originLocation
                    .distanceTo(destinationLocation) / 1000));
            createblack();
            count++;

            Toast.makeText(getBaseContext(), distance + "kms",
                    Toast.LENGTH_SHORT).show();

            info.setText("Selected destination is " + "\n" + add
                    + "\n" + " The journey distance is " + distance
                    + " Kms ");

            mapView.postInvalidate();
            isLongPress = true;

            mapController.animateTo(source);
            mapView.getMapCenter();



        }



        private void createblack() {
            // TODO Auto-generated method stub
            GeoPoint p = new GeoPoint((int) (lat * 1E6),
                    (int) (lon * 1E6));
            OverlayItem overlayitem = new OverlayItem(p,
                    "Destination", "");
            blackmarker.addOverlay(overlayitem);
            mapView.getOverlays().add(blackmarker);
        }
    });
    // Setting Negative "NO" Button
    alertDialog.setNegativeButton("NO",
            new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            // Write your code here to execute after dialog
            Toast.makeText(getApplicationContext(),
                    "You clicked on NO", Toast.LENGTH_SHORT).show();
            dialog.cancel();
        }
    });



    // Showing Alert Message
    alertDialog.show();




}

OnsingeTapup

@覆盖

public boolean onSingleTapUp（MotionEvent arg0）{ // TODO自动生成的方法存根

        Log.i("SingleTap", arg0.toString());

        GeoPoint geopoint = mapView.getProjection().fromPixels(
                (int) arg0.getX(), (int) arg0.getY());

        Geocoder geoCoder = new Geocoder(getBaseContext(), Locale.getDefault());
        try {
            List<Address> addresses = geoCoder.getFromLocation(
                    geopoint.getLatitudeE6() / 1E6,
                    geopoint.getLongitudeE6() / 1E6, 1);

            String add = "";
            if (addresses.size() > 0) {
                for (int i = 0; i < addresses.get(0).getMaxAddressLineIndex(); i++)
                    add += addresses.get(0).getAddressLine(i) + "\n";
            }

            if (count == 0) {

                info.setText("The location you have selected is" + "\n" + add
                        + "\n" + "To confirm it longpress the location");
            } else
                Toast.makeText(getBaseContext(), add, Toast.LENGTH_SHORT)
                .show();
        } catch (IOException ioe2) {
            ioe2.printStackTrace();
        }
        return true;
    }

另外使用Overlay Class来放置标记..

Answer 1

调试代码有点困难，因为缺少重要部分，但我建议看一下类似StackOverflow问题的以下答案：

https://stackoverflow.com/a/2990749/376016

用于识别MapView上的手势的建议解决方案是创建仅处理触摸事件并将其作为第一个叠加层插入的自定义叠加。使用这种方法，我能够创建一个小型测试应用程序，它使用了大部分代码并正确地忽略了MapView上的缩放手势。

按下mapview的内置缩放控件时会调用SingleTapUp

1 个答案: