android google map 的简单使用

Google map 是android platform中众多应用程序中的一员。

在移动开发中有两种方法使用google map。

第一种是使用web版本的map.实际实现是通过发送链接google 地图网站的intent，启动浏览器访问googlemap.没多大用处。

注意：使用此方法需在AndroidManifest.xml中加入相应的访问权限
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />

第二种就是使用google map jar 包的开发。通过创建MapActivity，并使用MapView来呈现地图。

注意：使用此方法需在AndroidManifest.xml中加入相应的访问权限

<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>

GoogleMap library：

1）MapView:

Mapview是用来显示地图的view。当MapView获得焦点，可以控制地图的移动和缩放。

地图可以以不同的形式来显示出来，如街景模式，卫星模式等，通过setSatellite(boolean) setTraffic(boolean), setStreetView(boolean) 方法。

MapView只能被MapActivity来创建，这是因为mapview需要通过后台的线程来连接网络或者文件系统，而这些线程要由mapActivity来管理。

需要特别说明的一点是，从android 1.5开始，map的zoom采用了built-in机制，可以通过setBuiltInZoomControls(boolean)来设置是否在地图上显示zoom控件。

常用方法：getController() getOverlays() setSatellite(boolean) setTraffic(boolean), setStreetView(boolean) setBuiltInZoomControls(boolean) 等。

2）MapActivity:

MapActivity是一个抽象类，任何想要显示MapView的activity都需要派生自MapActivity。并且必须在其派生类的 onCreate()中，创建一个MapView实例，可以通过new MapView 或者通过layout XML来创建。
3）MapController
控制地图移动，伸缩，以某个GPS坐标为中心，控制MapView中的view，管理Overlay，提供View的基本功能。使用多种地图模式（地图模式（某些城市可实时对交通状况进行更新），卫星模式，街景模式）来查看Google Map。
常用方法：animateTo(GeoPoint point)setCenter(GeoPoint point)setZoom(int zoomLevel) 等。

4）Overlay

Overlay是覆盖到MapView的最上层，可以扩展其ondraw()接口，自定义在MapView中显示一些自己的东西。MapView通过MapView.getOverlays()对Overlay进行管理。

除了Overlay这个基类，Google还扩展了2个比较有用的Overlay

1.MylocationOverlay—集成了Android.location中接收当前坐标的接口，集成SersorManager中CompassSensor的接口

我们只需要enableMyLocation(),enableCompass就可以让我们的程序拥有实时的MyLocation以及Compass 功能（Activity.onResume()中）。

2.ItemlizedOverlay—管理一个OverlayItem链表，用图片等资源在地图上作风格相同的标记。

5)Projection：MapView中GPS坐标与设备坐标的转换（GeoPoint和Point）。
另外：

android.location包下的Geocoder类可以实现街道地址与经纬度之间的转换。

效果图：

注：代理问题不能展示地图。实际可以。

XML Layout:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:background="#EEEEEE"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
    <LinearLayout
    	android:id="@+id/topL"
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:layout_marginTop="10dip"
	    android:gravity="center"
    	android:paddingLeft="10dip"
    >
    <LinearLayout
    	android:orientation="vertical"
	    android:layout_width="wrap_content"
	    android:layout_height="wrap_content"
	    android:gravity="center_vertical"
    >
    <LinearLayout
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
    >
    <TextView
    	android:text="@string/storename"
    	android:width="90dip"
    	android:textColor="#000000"
    	android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    />
    <TextView
    	android:textColor="#000000"
    	android:id="@+id/stoname"
    	android:text="Carrefour"
    	android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    />
    </LinearLayout>
    <LinearLayout
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
    >
    <TextView
    	android:text="@string/tel"
    	android:textColor="#000000"
    	android:width="90dip"
    	android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    />
    <TextView
    	android:id="@+id/tell"
    	android:textColor="#000000"
    	android:text="021-88888888"
    	android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    />
    </LinearLayout>
    </LinearLayout>
    <LinearLayout
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="80dip"
	    android:paddingRight="5dip"
	    android:gravity="right"
    >
    <ImageView
    	android:id="@+id/image"
    	android:src="@drawable/carrefour"
    	android:layout_width="80dip"
    	android:layout_height="70dip"
    	android:paddingRight="5dip"
    />
    </LinearLayout>
    </LinearLayout>
    <LinearLayout
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
    	android:paddingLeft="10dip"
    >
    <TextView
    	android:text="@string/address"
    	android:textColor="#000000"
    	android:width="90dip"
    	android:layout_width="wrap_content"
    	android:layout_height="wrap_content"
    />
    <TextView
    	android:id="@+id/addre"
    	android:text="No. 2860,Central Gaoke Road"
    	android:textColor="#000000"
    	android:layout_width="match_parent"
    	android:layout_height="wrap_content"
    	android:singleLine="false"
    	android:maxLines="3"
    	android:paddingRight="15dip"
    />
    </LinearLayout>
    <LinearLayout
    	android:id="@+id/mediumL"
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="260dip"
	    android:layout_marginLeft="10dip"
	    android:layout_marginRight="10dip"
	    android:layout_marginTop="10dip"
	    android:layout_marginBottom="10dip"
	    android:gravity="center"
    >
	<com.google.android.maps.MapView
 		android:id="@+id/map"
	    android:layout_width="fill_parent"
	    android:layout_height="fill_parent"
	    android:enabled="true"
	    android:clickable="true"
	    android:apiKey="@string/MachaelMapKey"
    />
    </LinearLayout>
    <LinearLayout
    	android:id="@+id/BottomL"
    	android:orientation="horizontal"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:gravity="center"
	    android:layout_marginLeft="10dip"
	    android:layout_marginRight="10dip"
	    android:paddingBottom="5dip"
    >
    <Button
    	android:id ="@+id/btnOK"
    	android:text="OK"
    	android:layout_width="150dip"
    	android:layout_height="35dip"
    />
    <Button
    	android:id ="@+id/btnUpdate"
    	android:text="UPDATE"
    	android:layout_width="150dip"
    	android:layout_height="35dip"
    />
    </LinearLayout>
</LinearLayout>

源代码：

package com.hzsi;

import java.util.ArrayList;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.google.android.maps.GeoPoint;
import com.google.android.maps.ItemizedOverlay;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.MyLocationOverlay;
import com.google.android.maps.OverlayItem;
import com.hzsi.util.ConstantUtil;

public class StoreMapInfo extends MapActivity {
	//log tag
	private static final String TAG = "StoreMapInfo";

	private MapView map = null;
	private MapController mapCon = null;
	private Button btnOK, btnUpdate = null;
	private TextView TVstore, TVTel, TVaddress;
	private ImageView image = null;
	private String city = "No city", storeName = "No store",
			tel = "No tel", address = "No address",
			picturePh = "", userName = "",storeID = "";

	// private LocationManager lm = null;
	// private static String provider = "gps";
	private GeoPoint currentGeoPoint = null;

	/** Called when the activity is first created. */
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.store_map_info);
		this.initViews();
		this.getIntentInfo();
		
		TVaddress.setText(address);
		TVTel.setText(tel);
		TVstore.setText(storeName);

		this.setTitle(city + "-" + storeName);

		map.setTraffic(true);
		map.setStreetView(true);
		map.setSatellite(false);
		map.setBuiltInZoomControls(true);
		GeoPoint geoBeiJing = new GeoPoint((int) 39.95 * 1000000,
				(int) 116.37 * 1000000);
		mapCon = map.getController();
		mapCon.animateTo(geoBeiJing);
		mapCon.setZoom(10);

		this.enableLocation(map);
		this.addShopIcon();
	}
	private void initViews() {
		map = (MapView) this.findViewById(R.id.map);
		btnOK = (Button) this.findViewById(R.id.btnOK);
		btnUpdate = (Button) this.findViewById(R.id.btnUpdate);
		TVstore = (TextView) this.findViewById(R.id.stoname);
		TVTel = (TextView) this.findViewById(R.id.tell);
		TVaddress = (TextView) this.findViewById(R.id.addre);
		image = (ImageView) this.findViewById(R.id.image);
		MyOnClickListener listener = new MyOnClickListener();
		btnOK.setOnClickListener(listener);
		btnUpdate.setOnClickListener(listener);
	}
	private void getIntentInfo(){
		Intent info = this.getIntent();
		city = info.getStringExtra(ConstantUtil.CITYNAMEKEY) == null ? city
				: info.getStringExtra(ConstantUtil.CITYNAMEKEY);
		storeName = info.getStringExtra(ConstantUtil.STORENAMEKEY) == null ? storeName
				: info.getStringExtra(ConstantUtil.STORENAMEKEY);
		tel = info.getStringExtra(ConstantUtil.STORETELKEY) == null ? tel
				: info.getStringExtra(ConstantUtil.STORETELKEY);
		address = info.getStringExtra(ConstantUtil.STOREADDRESSKEY) == null ? address
				: info.getStringExtra(ConstantUtil.STOREADDRESSKEY);
		picturePh = info.getStringExtra(ConstantUtil.STOREPICTUREKEY)==null?picturePh:info.getStringExtra(ConstantUtil.STOREPICTUREKEY);
		Log.e(TAG,picturePh);
		storeID = info.getStringExtra(ConstantUtil.STOREIDKEY)==null?storeID:info.getStringExtra(ConstantUtil.STOREIDKEY);
		userName = info.getStringExtra(ConstantUtil.LOGINSUCCESSNAME);
		this.checkUser();
		this.setImage();
		Log.w(TAG, "city="+city);
		Log.w(TAG, "store="+storeName);
		Log.w(TAG, "tel="+tel);
		Log.w(TAG, "address="+address);
		Log.w(TAG, "pict="+picturePh);
		Log.w(TAG, "user="+userName);
		Log.w(TAG, "storeID="+storeID);
	}
	private void checkUser(){
		if(userName == null){
			AlertDialog.Builder alert = new AlertDialog.Builder(this);
			alert.setTitle(R.string.userNotLogin);
			alert.setMessage(R.string.UserNotLoginMsg);
			alert.setPositiveButton("OK", new DialogInterface.OnClickListener(){

				public void onClick(DialogInterface dialog, int which) {
					Intent intent = new Intent(StoreMapInfo.this,LoginIn.class);
					StoreMapInfo.this.startActivity(intent);
				}
				
			});
		}
	}
	private void setImage() {
			Drawable dImage = Drawable.createFromPath(picturePh);
			if (dImage != null) {
				image.setImageDrawable(dImage);
			} else {
				Toast.makeText(this, "Can't find store picture!", 1000);
			}
	}

	// private void initGPSPosition(){
	// Log.i(TAG,"initnGPSPosition");
	// lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
	// provider = LocationManager.GPS_PROVIDER;
	// locationListener = new MyLocationListener();
	// requestLocationUpdates(6000,10);
	// Location loc = lm.getLastKnownLocation(provider);
	// addShopIcon();
	// if(loc!=null){
	// currentGeoPoint = new
	// GeoPoint((int)loc.getLatitude(),(int)loc.getLongitude());
	// mapCon.animateTo(currentGeoPoint);
	// }
	// }
	private void enableLocation(MapView mapView) {
		MyLocOverlay myLay = new MyLocOverlay(this, mapView);
		myLay.enableMyLocation();
		myLay.enableCompass();
		GeoPoint curGeoPoint = myLay.getMyLocation();
		if (curGeoPoint != null) {
			currentGeoPoint = curGeoPoint;
			mapCon.animateTo(currentGeoPoint);
		}
	}

	private void addShopIcon() {
		GeoPoint geoBeiJing = new GeoPoint((int) 39.95 * 1000000,
				(int) 116.37 * 1000000);
		Drawable shopIcon = this.getResources().getDrawable(R.drawable.shop);
		MyShopOverlay myOverlay = new MyShopOverlay(shopIcon);
		OverlayItem item1 = new OverlayItem(geoBeiJing, storeName, address);
		// item1.setMarker(shopIcon);
		myOverlay.addItem(item1);
		map.getOverlays().add(myOverlay);
		// mapCon.animateTo(geoBeiJing);
	}

	@Override
	protected boolean isRouteDisplayed() {
		return false;
	}

	protected class MyOnClickListener implements OnClickListener {
		public void onClick(View v) {
			if (v == btnOK) {
				Intent intent = new Intent(StoreMapInfo.this,StoreListActivity.class);
				intent.putExtra(
						ConstantUtil.LOGINSUCCESSNAME,userName
						);
				StoreMapInfo.this.startActivity(intent);
			} else if (v == btnUpdate) {
				Intent intent = new Intent(StoreMapInfo.this,StoreUpdateActivity.class);
				intent.putExtra(
						ConstantUtil.LOGINSUCCESSNAME,userName
						);
				intent.putExtra(ConstantUtil.STOREIDKEY, storeID);
				StoreMapInfo.this.startActivity(intent);
			}
		}
	}

	protected class MyShopOverlay extends ItemizedOverlay<OverlayItem> {

		public MyShopOverlay(Drawable defaultMarker) {
			super(boundCenterBottom(defaultMarker));
		}

		private ArrayList<OverlayItem> overlayItems = new ArrayList<OverlayItem>();

		@Override
		protected OverlayItem createItem(int i) {
			return overlayItems.get(i);
		}

		@Override
		public int size() {
			return overlayItems.size();
		}

		public void addItem(OverlayItem item) {
			overlayItems.add(item);
			this.populate();
		}

		// @Override
		// public void draw(Canvas canvas, MapView mapView, boolean shadow) {
		// Projection proj = map.getProjection();
		// for(OverlayItem item:overlayItems){
		// //title
		// String title = item.getTitle();
		// //snippet
		// String snippet = item.getSnippet();
		// //geopoints to pixels
		// Point point = proj.toPixels(item.getPoint(), null);
		// }
		// super.draw(canvas, mapView, shadow);
		// }
	}

	protected class MyLocOverlay extends MyLocationOverlay {

		public MyLocOverlay(Context context, MapView mapView) {
			super(context, mapView);
		}

		@Override
		public synchronized void onLocationChanged(Location location) {
			super.onLocationChanged(location);
			currentGeoPoint = new GeoPoint(
					(int) location.getLatitude() * 1000000, (int) location
							.getLongitude() * 1000000);
		}
	}
}

参考博客：

http://blog.csdn.net/L_serein/archive/2011/01/07/6122136.aspx

http://blog.csdn.net/mtawaken/archive/2010/12/17/6081886.aspx