Android--高德地图自动定位

和其他地图一样，都要先去官网注册成为开发者，然后获取Key。下面直接上代码。

效果图：

package com.example.gaodemap;


import com.amap.api.maps.AMap;
import com.amap.api.maps.CameraUpdate;
import com.amap.api.maps.CameraUpdateFactory;
import com.amap.api.maps.MapView;
import com.amap.api.maps.model.LatLng;
import com.amap.api.maps.model.Marker;
import com.amap.api.maps.model.MarkerOptions;

import android.app.Activity;
import android.content.Context;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.widget.CompoundButton;
import android.widget.ToggleButton;

public class MainActivity extends Activity  {

	private MapView mMapView;
	private AMap aMap;
	private MapView mapView;
	private LocationManager locationManager;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
		
		locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
		
		mMapView = (MapView) findViewById(R.id.map);
		mMapView.onCreate(savedInstanceState);
		init();
		//GPRS提供的定位信息改变
		locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 300, 8, new LocationListener() {
			
			@Override
			public void onStatusChanged(String provider, int status, Bundle extras) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onProviderEnabled(String provider) {
				// 使用GPRS提供的定位信息来更新位置
				updatePosition(locationManager.getLastKnownLocation(provider));
			}
			
			@Override
			public void onProviderDisabled(String provider) {
				// TODO Auto-generated method stub
				
			}
			
			@Override
			public void onLocationChanged(Location location) {
				// TODO Auto-generated method stub
				updatePosition(location);
			}
		});
	
		
		ToggleButton tb = (ToggleButton) findViewById(R.id.tb);
		tb.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener(){

			@Override
			public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
				// TODO Auto-generated method stub
				if(isChecked){
					aMap.setMapType(AMap.MAP_TYPE_SATELLITE);
				}else{
					aMap.setMapType(AMap.MAP_TYPE_NORMAL);
				}
			}
			
		});
	}

	//初始化AMap对象
	private void init(){
		if(aMap == null){
			aMap = mMapView.getMap();
		}
	}
	@Override
	protected void onDestroy() {
		// TODO Auto-generated method stub
		super.onDestroy();
		mMapView.onDestroy();
	}
	@Override
	protected void onPause() {
		// TODO Auto-generated method stub
		super.onPause();
		mMapView.onPause();
	}
	@Override
	protected void onResume() {
		// TODO Auto-generated method stub
		super.onResume();
		mMapView.onResume();
	}
	@Override
	protected void onSaveInstanceState(Bundle outState) {
		// TODO Auto-generated method stub
		super.onSaveInstanceState(outState);
		mMapView.onSaveInstanceState(outState);
	}

	private void updatePosition(Location location){
		LatLng pos = new LatLng(location.getLatitude(), location.getLongitude());
		//创建一个设置经纬度的CameraUpdate
		CameraUpdate cu = CameraUpdateFactory.changeLatLng(pos);
		//更新地图的显示区域
		aMap.moveCamera(cu);
		//清除所有的Marker等覆盖物
		aMap.clear();
		//创建一个MarkerOptions对象
		MarkerOptions markOptions = new MarkerOptions();
		markOptions.position(pos);
		//添加MarkerOptions（实际上是添加Marker）
		Marker marker = aMap.addMarker(markOptions);
	}
	
}

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
     >

    <com.amap.api.maps.MapView
        android:id="@+id/map"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
    </com.amap.api.maps.MapView>

    <ToggleButton 
        android:id="@+id/tb"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="top|right"
        android:textOff="普通地图"
        android:textOn="卫星地图"
        android:checked="false"
        android:background="@android:color/transparent"
        />
    <LinearLayout 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="bottom"
        android:orientation="horizontal"
        >
	    <Button 
	        android:id="@+id/near"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:text="附近"
	  		android:layout_weight="1"
	  		android:background="@android:color/transparent"
	        />
	    <Button 
	        android:id="@+id/route"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:text="路线"
	        android:background="@android:color/transparent"
	        android:layout_weight="1"
	        />
	    <Button 
	        android:id="@+id/my"
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:text="我的"
	        android:background="@android:color/transparent"
	        android:layout_weight="1"
	        />
    </LinearLayout>
</FrameLayout>