android定位得到城市

android通过百度地图获取经纬度和具体地址。

官方网站上就有Demo，http://developer.baidu.com/map/index.php?title=androidsdk

可以参考，打开定位的demo，把它的

1.jar包导入，

2.在AndroidManifest中

          a.把uses-permission复制进去，

          b.申请key~并复制<meta-data

                android:name="com.baidu.lbsapi.API_KEY"

                android:value="输入你的key" />

          c.因为自己定义了类继承Application，所以在Application处加上

                      android:name="自己定义的类名~"

3.就可以写代码了。

     MainActivity:

public class MainActivity extends Activity{
	private LocationClient mLocationClient;
        //显示城市
	private TextView LocationResult;
        //开始按钮
	private Button startLocation;
	public void init(){
		startLocation = (Button)findViewById(R.id.addfence);
		LocationResult = (TextView)findViewById(R.id.textView1);
	}
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.location);
		init();
		
		mLocationClient = ((LocationApplication)getApplication()).mLocationClient;
                  //调用LocationApplication，获得需要的信息
		 ((LocationApplication)getApplication()).mLocationResult = LocationResult;
		
		startLocation.setOnClickListener(new OnClickListener() {	
			@Override
			public void onClick(View v) {
				// TODO Auto-generated method stub
				InitLocation();
				mLocationClient.start();
		}			
			}
		});
	}
	@Override
	protected void onStop() {
		mLocationClient.stop();
		super.onStop();
	}

	private void InitLocation(){
		LocationClientOption option = new LocationClientOption();
		option.setLocationMode(LocationMode.Hight_Accuracy);//设置定位模式
		//LocationMode.Hight_Accuracy 高精度定位模式下，会同时使用GPS、Wifi和基站定位，返回的是当前条件下精度最好的定位结果
		option.setCoorType("gcj02");//返回的定位结果是百度经纬度，默认值gcj02
		//可选项："gcj02"国策局加密经纬度坐标
		//"bd09ll"百度加密经纬度坐标
		//"bd09"百度加密墨卡托坐标		
		option.setIsNeedAddress(true);//反编译获得具体位置，只有网络定位才可以
		mLocationClient.setLocOption(option);
	}
}

LocationAplication类：

public class LocationApplication extends Application {
	public LocationClient mLocationClient;//定位SDK的核心类
	public MyLocationListener mMyLocationListener;//定义监听类	
	public TextView mLocationResult,logMsg;
	public static String city=null;
	@Override
	public void onCreate() {
		super.onCreate();
		mLocationClient = new LocationClient(this.getApplicationContext());
		mMyLocationListener = new MyLocationListener();
		mLocationClient.registerLocationListener(mMyLocationListener);
	}
	
	/**
	 * 实现实位回调监听
	 */
	public class MyLocationListener implements BDLocationListener {

		@Override
		public void onReceiveLocation(BDLocation location) {
			//Receive Location 			
			if(location.getCity()!=null){
				city=location.getCity();
			}			
			StringBuffer sb = new StringBuffer(256);
			if (location.getLocType() == BDLocation.TypeGpsLocation){//定位结果描述：GPS定位结果
				sb.append(city);//地理位置
			} else if (location.getLocType() == BDLocation.TypeNetWorkLocation){//定位结果描述：网络定位结果
				sb.append(city);
			}
			logMsg(sb.toString());
		}
	}	
	/**
	 * 显示请求字符串
	 * @param str
	 */
	public void logMsg(String str) {
		try {
			if (mLocationResult != null)
				mLocationResult.setText(str);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}