Android定位当前城市的实现_android 城市定位

http://download.csdn.net/detail/u013091087/9405004

以下是一个定位获取当前所在城市的Android·Demo，用真机并且联网才能获取，不然就是奔溃报错，退出。

1、首先拿到相关的jar放到项目的libs中

2、在项目的AndroidManifest清单中添加一个定位服务和相关的权限

<service
            android:name="com.baidu.location.f"
            android:enabled="true"
            android:process=":remote" >
            <intent-filter>
                <action android:name="com.baidu.location.service_v2.2" >
                </action>
            </intent-filter>
        </service>

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
    <uses-permission android:name="android.permission.INTERNET" />
    <uses-permission android:name="android.permission.READ_CONTACTS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
    <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
    <uses-permission android:name="android.permission.READ_PHONE_STATE" />
    <uses-permission android:name="android.permission.READ_LOGS" />
    <uses-permission android:name="android.permission.VIBRATE" />
    <uses-permission android:name="android.permission.WAKE_LOCK" />

3、开撸代码

1）、 布局文件activty_main:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
 
    <Button
        android:id="@+id/btn_location"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="定位" />
 
    <TextView
        android:id="@+id/tv_city"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/btn_location"
        android:layout_marginTop="10dp"
        android:gravity="center"
        android:text="@string/hello_world" />
 
</RelativeLayout>

2）、MyApplication，在AndroidManifest中的application中要注册上去，当打开app时，首先加载该类

该类具体是实现定位功能（发起定位，停止定位，定位相关属性设置，定位成功发送广播到MainActivity中进行处理）

package com.jiaui.locationdemo;
 
import android.app.Application;
import android.content.Intent;
 
import com.baidu.location.BDLocation;
import com.baidu.location.BDLocationListener;
import com.baidu.location.LocationClient;
import com.baidu.location.LocationClientOption;
 
public class MyApplication extends Application {
 
	private static LocationClient mLC = null;
	
	@Override
	public void onCreate() {
		// TODO Auto-generated method stub
		super.onCreate();
		initLocation();
	}
 
	/**
	 * 初始化定位的内容
	 */
	private void initLocation() {
		mLC = new LocationClient(this);
		// 使用eclipse的SHA1值和该Project的包名去百度地图API那里注册一个key
		mLC.setAK("Aiy12UcER9wwkppqaINQZoA0");
		mLC.registerLocationListener(new MyLocationListener());
	}
 
	/**
	 * 发起定位
	 */
	public static void requestLocationInfo() {
		setLocationOption();
		if (mLC != null && !mLC.isStarted())
			mLC.start();
		if (mLC != null && mLC.isStarted())
			mLC.requestLocation();
	}
 
	/**
	 * 停止定位
	 */
	private void stopLocationClient() {
		if (mLC != null && mLC.isStarted())
			mLC.stop();
	}
 
	/**
	 * 设置定位相关参数
	 */
	private static void setLocationOption() {
		LocationClientOption option = new LocationClientOption();
		option.setOpenGps(true);// 打开GPS
		option.setCoorType("bd09ll");// 设置坐标类型
		option.setServiceName("com.baidu.location.service_v2.9");
		option.setPoiExtraInfo(true);
		option.setAddrType("all");// 详细地址
		option.setPoiNumber(10);
		option.disableCache(true);
		option.setPriority(LocationClientOption.NetWorkFirst);
		option.setPriority(LocationClientOption.GpsFirst); // gps
		mLC.setLocOption(option);
	}
 
	private class MyLocationListener implements BDLocationListener {
 
		public void onReceiveLocation(BDLocation location) {
			if (location == null) {
				sendBroadCast("定位失败");
				return;
			}
			sendBroadCast(location.getCity());
		}
 
		public void onReceivePoi(BDLocation poilocation) {
			if (poilocation == null) {
				sendBroadCast("定位失败");
				return;
			}
			sendBroadCast(poilocation.getCity());
		}
	}
 
	/**
	 * 得到结果发送广播
	 * 
	 * @param city
	 */
	private void sendBroadCast(String city) {
		stopLocationClient();// 停止定位
		Intent intent = new Intent(MainActivity.LOCATION_BCR);
		intent.putExtra("city", city);
		sendBroadcast(intent);
	}
 
}

3）、MainActivity，注册广播-初始化组件-监听，操作。

package com.jiaui.locationdemo;
 
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
 
public class MainActivity extends Activity {
 
	private Button mLocationBtn;// 定位按钮
	private TextView mCityNameTv;// 显示当前定位成功的城市
 
	public static final String LOCATION_BCR = "location_bcr";
 
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
 
		registerBroadCastReceiver();
		initView();
		initListen();
 
	}
 
	/**
	 * 初始化组件
	 */
	private void initView() {
		mLocationBtn = (Button) findViewById(R.id.btn_location);
		mCityNameTv = (TextView) findViewById(R.id.tv_city);
	}
 
	/**
	 * 初始化监听
	 */
	private void initListen() {
		mLocationBtn.setOnClickListener(new View.OnClickListener() {
			public void onClick(View v) {
				mCityNameTv.setText("定位中...");
				// 发起定位
				MyApplication.requestLocationInfo();
			}
		});
	}
 
	/**
	 * 初始化广播，重写onReceive，处理接收回来的结果
	 */
	private BroadcastReceiver mLocationBcr = new BroadcastReceiver() {
		public void onReceive(Context context, Intent intent) {
			String city = intent.getStringExtra("city");
			mCityNameTv.setText(city);
		}
	};
 
	/**
	 * 注册广播
	 */
	private void registerBroadCastReceiver() {
		IntentFilter intentToReceiverFilter = new IntentFilter();
		intentToReceiverFilter.addAction(LOCATION_BCR);
		registerReceiver(mLocationBcr, intentToReceiverFilter);
	}
 
	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		unregisterReceiver(mLocationBcr);// 注销广播
	}
}

其中需要给项目申请一个百度key，具体操作如下图：