在操作栏上搜索位置Android

Question

我想询问如何使用操作栏查找位置。我制作的程序如下图所示：

我已经做了一个类来找到位置。但在我调用EditText搜索时，类不起作用。

// An AsyncTask class for accessing the GeoCoding Web Service 
private class GeocoderTask extends AsyncTask<String, Void, List<Address>>{ 

    @Override 
    protected List<Address> doInBackground(String... locationName) { 
     // Creating an instance of Geocoder class 
     Geocoder geocoder = new Geocoder(getBaseContext()); 
     List<Address> addresses = null; 

     try { 
      // Getting a maximum of 3 Address that matches the input text 
      addresses = geocoder.getFromLocationName(locationName[0], 3); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
     return addresses; 
    } 
} 

protected void onPostExecute(List<Address> addresses) { 

    if(addresses==null || addresses.size()==0){ 
     Toast.makeText(getBaseContext(), "No Location found", Toast.LENGTH_SHORT).show(); 
    } 

    // Clears all the existing markers on the map 
    map.clear(); 

    // Adding Markers on Google Map for each matching address 
    for(int i=0;i<addresses.size();i++){ 

     Address address = (Address) addresses.get(i); 

     // Creating an instance of GeoPoint, to display in Google Map 
     latLng = new LatLng(address.getLatitude(), address.getLongitude()); 

     String addressText = String.format("%s, %s", 
     address.getMaxAddressLineIndex() > 0 ? address.getAddressLine(0) : "", 
     address.getCountryName()); 

     markerOptions = new MarkerOptions(); 
     markerOptions.position(latLng); 
     markerOptions.title(addressText); 

     map.addMarker(markerOptions); 

     // Locate the first location 
     if(i==0) 
      map.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng,10)); 
    } 
} 

我不得不将这个类调用到类操作栏菜单中。像这样：

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

    /** Get the action view of the menu item whose id is search */ 
    View v = (View) menu.findItem(R.id.search).getActionView(); 

    /** Get the edit text from the action view */ 
    EditText txtSearch = (EditText) v.findViewById(R.id.txt_search); 

    /** Setting an action listener */ 
    txtSearch.setOnEditorActionListener(new OnEditorActionListener() { 

     @Override 
     public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { 

      // Getting user input location 
      String location = v.getText().toString(); 

      if(location!=null && !location.equals("")){ 
       new GeocoderTask().execute(location); 
      } 

      Toast.makeText(getBaseContext(), "Search : " + v.getText(), Toast.LENGTH_SHORT).show(); 
      return false; 
     } 
    }); 
    return super.onCreateOptionsMenu(menu); 
} 

请帮助那些了解我遇到的问题的人。 :)

Answer 1

String strPlace = etSearch.getText().toString(); 

     Geocoder gc = new Geocoder(getBaseContext(), Locale.getDefault()); 
     List<Address> adrs = null; 
     try{ 
      adrs = gc.getFromLocationName(strPlace,5); 
     }catch(IOException e){ 

     }finally{ 

      if (adrs != null){ 
       if(adrs.size() > 0) 
       { 

        LatLng loc = new LatLng(adrs.get(0).getLatitude(), adrs.get(0).getLongitude()); 

        map.moveCamera(CameraUpdateFactory.newLatLngZoom(loc, 15)); 

        // Zoom in, animating the camera. 
        map.animateCamera(CameraUpdateFactory.zoomTo(13), 2000, null); 
}