高德地图-绘制个人历史位置路线

思路：将当前个人位置（经纬度信息）存储到手机数据库（SQLITE）中，然后遍历数据库中的所有位置信息，并绘制到MAP图层上。

1.数据库帮助类:

package com.example.touchpoint;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class MysqliteHelper extends SQLiteOpenHelper{


	private static final String DATABASE_NAME = "my.db";
	private static final int DATABASE_VERSION = 1;
	
	public static final String COLUMN_ID = "_id";	//必须的
	public static final String COLUMN_LATITUDE = "latitude";
	public static final String COLUMN_LONGITUDE = "longitude";
	public static final String COLUMN_UPLOAD_TIME = "upload_time";	//暂时没用
	
	
	public static final String[] allColumns = {COLUMN_ID,COLUMN_LATITUDE,COLUMN_LONGITUDE};
	
	private static final String CREATE_TABLE = "create table if not exists routlist"
											 + "("
											 + COLUMN_ID + " integer primary key autoincrement, "
											 + COLUMN_LATITUDE + " REAL not null, "
											 + COLUMN_LONGITUDE + " REAL not null "
											 + ");";
	
	public MysqliteHelper(Context context) {
		super(context, DATABASE_NAME, null, DATABASE_VERSION);
	}

	@Override
	public void onCreate(SQLiteDatabase db) {
		Log.d("CREATE_TABLE",CREATE_TABLE);
		db.execSQL(CREATE_TABLE);
	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
		db.execSQL("drop table " + CREATE_TABLE);
		onCreate(db);
	}
}

2.数据库DAO

package com.example.touchpoint;

import java.util.ArrayList;
import java.util.List;

import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.util.Log;

public class SqliteDAO {

	private SQLiteDatabase db;
	private MysqliteHelper helper;
	
	public SqliteDAO(Context context) {
		helper = new MysqliteHelper(context);
	}
	
	public void open() {
		db = helper.getWritableDatabase();
	}
	
	public void close() {
		helper.close();
	}
	public void writePositionToDB(double latitude,double longitude) {
		ContentValues values = new ContentValues();
		values.put(MysqliteHelper.COLUMN_LATITUDE, latitude);
		values.put(MysqliteHelper.COLUMN_LONGITUDE, longitude);
		db.insert("routlist", null, values);
	}

	public List<LocationPoint> getAllPoints() {
		List<LocationPoint> points = new ArrayList<LocationPoint>();

		Cursor cursor = db.query("routlist", MysqliteHelper.allColumns, null, null,
				null, null, null);

		cursor.moveToFirst();
		while (!cursor.isAfterLast()) {
			LocationPoint point = cursorToPoint(cursor);
			points.add(point);
			cursor.moveToNext();
		}
		// 记得关闭cursor对象
		cursor.close();
		return points;
	}
	
	private LocationPoint cursorToPoint(Cursor cursor) {
		LocationPoint point = new LocationPoint();
		point.set_id(cursor.getLong(0));
		point.setLatitude(cursor.getDouble(1));
		point.setLongitutde(cursor.getDouble(2));
		Log.d("route",point.toString());
		return point;
	}
}

3.POJO类:

package com.example.touchpoint;

public class LocationPoint {

	private long _id;
	private double latitude;
	private double longitutde;

	public long get_id() {
		return _id;
	}

	public void set_id(long _id) {
		this._id = _id;
	}

	public double getLatitude() {
		return latitude;
	}

	public void setLatitude(double latitude) {
		this.latitude = latitude;
	}

	public double getLongitutde() {
		return longitutde;
	}

	public void setLongitutde(double longitutde) {
		this.longitutde = longitutde;
	}

	@Override
	public String toString() {
		return "LocationPoint [_id=" + _id + ", latitude=" + latitude
				+ ", longitutde=" + longitutde + "]";
	}
}

4.ItemizedOverlay类

package com.example.touchpoint;

import java.util.ArrayList;
import java.util.List;

import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.util.Log;

import com.amap.mapapi.core.GeoPoint;
import com.amap.mapapi.core.OverlayItem;
import com.amap.mapapi.map.ItemizedOverlay;
import com.amap.mapapi.map.MapView;
import com.amap.mapapi.map.Projection;

public class RouteItemizedOverlay extends ItemizedOverlay<OverlayItem>{

	private List<OverlayItem> list = new ArrayList<OverlayItem>();
	
	public RouteItemizedOverlay(Drawable d) {
		super(boundCenterBottom(d));		
	}

	@Override
	protected OverlayItem createItem(int id) {
		return list.get(id);
	}

	@Override
	public int size() {
		return list.size();

	}
	
	@Override
	public void draw(Canvas canvas, MapView mapView, boolean shadow) {


		Projection proj = mapView.getProjection();
		Path path = new Path();
		Paint paint = new Paint();
		paint.setAntiAlias(true);  
        paint.setColor(Color.BLUE);  
        paint.setStyle(Paint.Style.STROKE);  
        paint.setStrokeWidth(3);  
		
		for (int i = 0; i < this.size(); i++) {
			OverlayItem item = (OverlayItem)createItem(i);
			GeoPoint gp = item.getPoint();
			Log.d("aa",gp.getLatitudeE6() +" " + gp.getLongitudeE6());
			Point mPoint = new Point();
			proj.toPixels(gp, mPoint);

			if(i == 0) {
				path.moveTo(mPoint.x, mPoint.y);
				Log.d("path","[" + mPoint.x + "," + mPoint.y+ "]");
			}else{
				path.lineTo(mPoint.x, mPoint.y);
				Log.d("path","[" + mPoint.x + "," + mPoint.y+ "]");
			}
			//canvas.drawText("ca", mPoint.x, mPoint.y, new Paint());
		}
		path.close();

		canvas.drawPath(path, paint);

		super.draw(canvas, mapView, shadow);
	}
	public void addMyRoute(List<LocationPoint> points) {

		for(LocationPoint point : points) {
				GeoPoint gp = new GeoPoint((int)(point.getLatitude()*1E6),(int)(point.getLongitutde()*1E6));
				OverlayItem myItem = new OverlayItem(gp, "title", "snippet");
				list.add(myItem);
				Log.d("add","add an item");
				populate();
		}

	}

}

5.MainActivity类:

package com.example.touchpoint;

import java.util.List;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;

import com.amap.mapapi.core.GeoPoint;
import com.amap.mapapi.location.LocationManagerProxy;
import com.amap.mapapi.location.LocationProviderProxy;
import com.amap.mapapi.map.MapActivity;
import com.amap.mapapi.map.MapController;
import com.amap.mapapi.map.MapView;
import com.amap.mapapi.map.MyLocationOverlay;
import com.amap.mapapi.map.Overlay;
import com.amap.mapapi.map.Projection;

public class MainActivity extends MapActivity implements LocationListener {

	private MapView mMapView;

	private MapController controller;

	private List<Overlay> mapOverlayList;

	private LocationManagerProxy locationProxy;

	private SqliteDAO dao;

	private RouteItemizedOverlay routeOverlay;
	
	private MyOverlay overlay;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);

		mMapView = (MapView) findViewById(R.id.main_mapView);
		mMapView.setBuiltInZoomControls(true); // 开启缩放控件

		mMapView.setSatellite(true); // 设置为卫星模式

		controller = mMapView.getController();

		controller.setZoom(3);

		mapOverlayList = mMapView.getOverlays();

		locationProxy = LocationManagerProxy.getInstance(this);

		Drawable d = getResources().getDrawable(R.drawable.new_func_dot);

		routeOverlay = new RouteItemizedOverlay(d);

		dao = new SqliteDAO(this);

	}

	@Override
	protected void onPause() {
		locationProxy.removeUpdates(this);
		dao.close();
		super.onPause();
	}

	@Override
	protected void onResume() {
		locationProxy.requestLocationUpdates(
				LocationProviderProxy.MapABCNetwork, 0, 0, this);
		dao.open();
		super.onResume();
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		getMenuInflater().inflate(R.menu.activity_main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		switch (item.getItemId()) {
		case R.id.showroute:
			showRoutlist();
			break;
		case R.id.closeroute:
			break;
		default:
			break;
		}
		return super.onOptionsItemSelected(item);
	}

	private void showRoutlist() {
		mapOverlayList.remove(overlay);
		locationProxy.removeUpdates(this); // 取消位置监听（数据库不会有更新)

		routeOverlay.addMyRoute(dao.getAllPoints());

		mapOverlayList.add(routeOverlay);
	}

	public void closeRoute() {
		mapOverlayList.clear(); // 清空路线
		Location last = locationProxy
				.getLastKnownLocation(LocationProviderProxy.MapABCNetwork);

		mapOverlayList.add(new MyOverlay(this, new GeoPoint((int) (last
				.getLatitude() * 1E6), (int) (last.getLongitude() * 1E6))));
		locationProxy.requestLocationUpdates(LocationManagerProxy.GPS_PROVIDER,
				0, 0, this); // 开始监听位置变化
	}

	public void onLocationChanged(Location location) {
		mapOverlayList.clear();
		if (location != null) {
			double latitude = location.getLatitude();
			double longitude = location.getLongitude();

			dao.writePositionToDB(latitude, longitude); // 写进数据库

			GeoPoint gp = new GeoPoint((int) (latitude * 1E6),
					(int) (longitude * 1E6));
		    overlay = new MyOverlay(this, gp);
			mapOverlayList.add(overlay);
		}
	}

	public void onStatusChanged(String provider, int status, Bundle extras) {

	}

	public void onProviderEnabled(String provider) {

	}

	public void onProviderDisabled(String provider) {

	}

}

class MyOverlay extends Overlay {

	private Context mContext;
	private GeoPoint gp;
	private Bitmap bitmap;

	public MyOverlay(Context mContext, GeoPoint gp) {
		this.mContext = mContext;
		this.gp = gp;
		bitmap = BitmapFactory.decodeResource(mContext.getResources(),
				R.drawable.new_func_dot);
	}

	@Override
	public void draw(Canvas canvas, MapView mapView, boolean shadow) {
		Projection proj = mapView.getProjection();
		Point mPoint = proj.toPixels(gp, null);
		canvas.drawBitmap(bitmap, mPoint.x, mPoint.y, null);
		super.draw(canvas, mapView, shadow);
	}

}

用到的图片:

项目文件在：http://download.csdn.net/detail/czjuttsw/4861690