Android的 - 牵制位置单击列表视图项时映射？

Question

我有一个包含几个出租车公司的列表视图。当上了出租车名称的用户点击，它显示了一个alertdialog箱要求他们要么书，显示地图或取消。什么即时试图实现的是，当用户点击显示地图，它抓住从一个字符串数组已经设定的位置，然后点在地图上。我不希望它找到我的当前位置为呢。这是可能的吗？我已经有一个MapView设置这在目前只是点从教程的随机位置设置。

这是我的代码两者：

    ListTaxi Class : 

             class Taxi {
    private String taxiName;
    private String taxiAddress;
    private String taxiDist;

    public String getName() {
        return taxiName;
    }

    public void setName(String name) {
        taxiName = name;
    }

    public String getAddress() {
        return taxiAddress;
    }

    public void setAddress(String address) {
        taxiAddress = address;
    }
    public String getDist() {
        return taxiDist;
    }
    public void setDist(String dist){
        taxiDist = dist;
    }
    public Taxi(String name, String address, String dist) {
        taxiName = name;
        taxiAddress = address;
        taxiDist = dist;
    }
}

public class TaxiAdapter extends ArrayAdapter<Taxi> {
    private ArrayList<Taxi> items;
    private TaxiViewHolder taxiHolder;

    private class TaxiViewHolder {
        TextView name;
        TextView address; 
        TextView dist;
    }

    public TaxiAdapter(Context context, int tvResId, ArrayList<Taxi> items) {
        super(context, tvResId, items);
        this.items = items;
    }

    @Override
    public View getView(int pos, View convertView, ViewGroup parent) {
        View v = convertView;
        if (v == null) {
            LayoutInflater vi = (LayoutInflater)getSystemService(LAYOUT_INFLATER_SERVICE);
            v = vi.inflate(R.layout.taxi_list_item, null);
            taxiHolder = new TaxiViewHolder();
            taxiHolder.name = (TextView)v.findViewById(R.id.taxi_name);
            taxiHolder.address = (TextView)v.findViewById(R.id.taxi_address);
            taxiHolder.dist = (TextView)v.findViewById(R.id.taxi_dist);
            v.setTag(taxiHolder);
        } else taxiHolder = (TaxiViewHolder)v.getTag(); 

        Taxi taxi = items.get(pos);

        if (taxi != null) {
            taxiHolder.name.setText(taxi.getName());
            taxiHolder.address.setText(taxi.getAddress());
            taxiHolder.dist.setText(taxi.getDist());
        }

        return v;
    }
}

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

    final String[] taxiNames = getResources().getStringArray(R.array.taxi_name_array);
    final String[] taxiAddresses = getResources().getStringArray(R.array.taxi_address_array);
    final String[] taxiDist = getResources().getStringArray(R.array.taxi_array_dist);
    ArrayList<Taxi> taxiList = new ArrayList<Taxi>();

    for (int i = 0; i < taxiNames.length; i++) {
        taxiList.add(new Taxi(taxiNames[i], taxiAddresses[i], taxiDist[i]));

    }


    setListAdapter(new TaxiAdapter(this, R.layout.taxi_list_item, taxiList));  

    final ListView lv = getListView();
    lv.setTextFilterEnabled(true);

        lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> a, View v, final int position, long id)
        {       

            final int selectedPosition = position;
            AlertDialog.Builder adb=new AlertDialog.Builder(ListTaxi.this); 
             adb.setTitle("Taxi Booking");
             adb.setMessage("You Have Selected: "+taxiNames[selectedPosition]); 
             adb.setPositiveButton("Book", new DialogInterface.OnClickListener() {
                 public void onClick(DialogInterface dialog, int id) {
                     Intent intent = new Intent(ListTaxi.this, Booking.class);
                     intent.putExtra("booking",  taxiNames[selectedPosition]);
                     intent.putExtra("address",  taxiAddresses[selectedPosition]);
                     intent.putExtra("distance", taxiDist[selectedPosition]);
                     startActivity(intent);
                 }
             });
             adb.setNeutralButton("Show Map", new DialogInterface.OnClickListener() {
                 public void onClick(DialogInterface dialog, int id) {
                     Intent intent = new Intent(ListTaxi.this, Map.class);
                     startActivity(intent);
                 }
             });

             adb.setNegativeButton("Cancel", null); 
             adb.show();
         }
     });     
}

}

和我的地图类是：                 / **  *  * / 包com.taxime;

    public class Map extends MapActivity{
LinearLayout linearLayout;
MapView mapView;
List<Overlay> mapOverlays;
Drawable drawable;
ItemizedOverlay itemizedOverlay;


public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mapviews);

        mapView = (MapView) findViewById(R.id.mapView);
        mapView.setBuiltInZoomControls(true);



        mapOverlays = mapView.getOverlays();
        drawable = this.getResources().getDrawable(R.drawable.androidmarker);
        itemizedOverlay = new ItemizedOverlay(drawable);

        Intent intent = getIntent();
        if (intent != null) {
            if (Intent.ACTION_VIEW.equals(intent.getAction())) {
                if (intent.getData() != null) {
                    int selectedPosition = Integer.parseInt(intent.getData().getHost());
                    GeoPoint point = new GeoPoint(selectedPosition, selectedPosition);

                    OverlayItem overlayitem = new OverlayItem(point, "", "");
                    itemizedOverlay.addOverlay(overlayitem);
                    mapOverlays.add(itemizedOverlay);

                    //...
                }
            }
        }

另外我的琴弦来自：

    <string-array name="taxi_name_array">
    <item>Barrys Taxi</item>
    <item>Boom Taxi</item>

</string-array>

<string-array name="taxi_address_array">
<item>24 test address, Uxbridge, UB8 2JY</item>
<item>14 test 2 address, Uxbridge, UB91JD</item>
</string-array>
<string-array name = "taxi_array_dist">
<item>0.4 miles</item>
<item>0.8 miles</item>
</string-array>
<string-array name ="location">
<item>(19240000,-99120000)</item>
</string-array>

如果任何人有任何想法，将是真棒。

再次感谢大家

Answer 1

你可以做的是使用意向的数据字段通过，被点击的地图活动的出租车项目的位置。要做到这一点，对于“地图”按钮onClick处理程序中，您使用Intent构造函数，它有四个参数：

adb.setNeutralButton("Show Map", new DialogInterface.OnClickListener() {
    public void onClick(DialogInterface dialog, int id) {
        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse("taxi:" + selectedPosition), ListTaxi.this, Map.class);
        startActivity(intent);
    }
});

然后，地图活动内，可以调用 getIntent 方法来检索启动它的Intent。调用 getData 的意图检索数据字段

全部放在一起，你会像在地图活动的onCreate覆盖以下内容：

Intent intent = getIntent();
if (intent != null) {
    if (Intent.ACTION_VIEW.equals(intent.getAction())) {
        if (intent.getData() != null) {
            int selectedPosition = Integer.parseInt(intent.getData().getHost());
            String[] taxiLocations = getResources().getStringArray(R.array.location);
            String location = taxiLocations[selectedPosition];
            //...
        }
    }
}

Answer 2

您的意思是你有一个地址和所需要的纬度/经度设置地图？像这样也许：

    Geocoder gc = new Geocoder(this.getApplicationContext()) ;
    List<Address> addresses = null ;

    try {
       addresses = gc.getFromLocationName("123 Main St, Peoria IL 61601", 10) ;
    } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
    }

    Address a = addresses.get(0) ;
    double lat = a.getLatitude() ;
    double lon = a.getLongitude() ;

    MapController mc = mapView.getController();

    p = new GeoPoint(
        (int) (lat * 1E6), 
        (int) (lon * 1E6));

    mc.animateTo(p);
    mc.setZoom(18);
    mapView.invalidate();