android GoogleMap定位（四）

根据输入的名称查询
 
注：地点输入错误的时候会导致程序崩溃，暂没做处理。(可进行提示的)
 
主界面：
Java代码 
package com.hc; 
 
import java.util.List; 
 
import com.google.android.maps.GeoPoint; 
import com.google.android.maps.MapActivity; 
import com.google.android.maps.MapController; 
import com.google.android.maps.MapView; 
import com.google.android.maps.Overlay; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.EditText; 
import android.widget.RadioGroup; 
import android.widget.RadioGroup.OnCheckedChangeListener; 
import android.widget.Toast; 
 
public class AddressActivity extends MapActivity { 
    /** Called when the activity is first created. */ 
    Button locBn; 
    MapView mv; 
    EditText address_value; 
    MapController controller; 
    Bitmap posBitmap; 
 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.address); 
        posBitmap = BitmapFactory.decodeResource(getResources(), 
                R.drawable.icon); 
        mv = (MapView) findViewById(R.id.mv); 
        address_value = (EditText) findViewById(R.id.address_value); 
        // 显示放大缩小控制按钮 
        mv.setBuiltInZoomControls(true); 
        controller = mv.getController(); 
        locBn = (Button) findViewById(R.id.location); 
        locBn.setOnClickListener(new OnClickListener() { 
 
            @Override 
            public void onClick(View v) { 
 
                String address = address_value.getEditableText().toString().trim(); 
                if (address.equals("")) { 
                    Toast.makeText(AddressActivity.this, "输入有效地址", 
                            Toast.LENGTH_LONG).show(); 
                } else { 
                    double[] result=ConvertUtil.getLocationInfo(address); 
                    UpdateMapView(result[0], result[1]); 
                } 
            } 
 
        }); 
        locBn.performClick(); 
    } 
 
    @Override 
    protected boolean isRouteDisplayed() { 
        // TODO Auto-generated method stub 
        return true; 
    } 
 
    private void UpdateMapView(double dlong, double dLat) { 
    GeoPoint gp = new GeoPoint((int)(dLat*1E6), (int)(dlong*1E6)); 
    mv.displayZoomControls(true); 
    controller.animateTo(gp); 
    List<Overlay> ol = mv.getOverlays(); 
    ol.clear(); 
    ol.add(new PosOverLay(gp, posBitmap)); 
    } 
} 
 
处理请求（推荐此处用service，handle来进行处理交互） 
 
package com.hc; 
 
import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStream; 
import java.io.InputStreamReader; 
 
import org.apache.http.HttpEntity; 
import org.apache.http.HttpResponse; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.HttpClient; 
import org.apache.http.client.methods.HttpGet; 
import org.apache.http.impl.client.DefaultHttpClient; 
import org.json.JSONException; 
import org.json.JSONObject; 
 
public class ConvertUtil { 
public static double[] getLocationInfo(String address){ 
    HttpClient client= new DefaultHttpClient(); 
    HttpGet httpGet=new HttpGet("http://maps.google.com/maps/api/geocode/json?address="+address+"ka&sensor=false"); 
    StringBuffer sb =new StringBuffer(); 
    HttpResponse response; 
    try { 
        response = client.execute(httpGet); 
        HttpEntity entity =response.getEntity(); 
InputStream in=entity.getContent(); 
BufferedReader reader = new BufferedReader(new InputStreamReader(in, "UTF-8")); 
//int len = 0;   
//while((len =in.read())!=-1){ 
//  sb.append((char)len); 
//} 
String line=null; 
while ((line = reader.readLine()) != null) { 
 sb.append(line); 
 } 
in.close(); 
reader.close(); 
JSONObject json = new JSONObject(sb.toString()); 
    JSONObject location = json.getJSONArray("results").getJSONObject(0).getJSONObject("geometry").getJSONObject("location"); 
    double x=location.getDouble("lng"); 
    double y = location.getDouble("lat"); 
    return new double[]{x,y}; 
    } catch (ClientProtocolException e) { 
        // TODO Auto-generated catch block 
        e.printStackTrace(); 
    }

补充：移动开发 , Android ,

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