天地图在Android上的简单应用

2019-11-08 00:12:25

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天地图是由国家地理信息测绘局出的，以jar包的形式提供各种地图服务和数据，如地图展示、标注、定位等等。下面介绍几种简单的用法。一、集成步奏 1、导入jar包将API文件tiandituapi.jar拷贝到工程根目录下，并在工程属性->java Build Path->Libraries中选择”Add External JARs”， tiandituapi.jar，确定后返回，这样您就可以在您的程序中使用API了。 2、添加权限在AndroidManiFest文件中添加以下权限

<uses-permission android:name="android.permission.access_NETWORK_STATE" /> <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.CALL_PHONE" /> <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" /> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

3、在xml文件中添加地图显示组件。

<com.tianditu.android.maps.MapView android:id="@+id/map_tian_location_map" android:layout_width="match_parent" android:layout_height="match_parent" />

4、在Activity的onCreate方法中初始化地图。

MapView mMapView = (MapView) findViewById(map_tian_location_map); //设置启用内置的缩放控件 mMapView.setBuiltInZoomControls(true); //得到mMapView的控制权,可以用它控制和驱动平移和缩放 MapController mMapController = mMapView.getController(); //用给定的经纬度构造一个GeoPoint，单位是微度 (度 * 1E6) GeoPoint point = new GeoPoint((int) (39.915 * 1E6), (int) (116.404 * 1E6)); //设置地图中心点 mMapController.setCenter(point); //设置地图zoom级别 mMapController.setZoom(12);

这样就可以显示地图了，其他详细的功能实现参考官方API：http://lbs.tianditu.com/api-new/mobile/guide.html#map3

二、其他功能实现。 1、在地图上添加覆盖物点

package com.yongnuo.mccms.utils;import android.content.Context;import android.graphics.drawable.Drawable;import android.view.KeyEvent;import com.tianditu.android.maps.GeoPoint;import com.tianditu.android.maps.ItemizedOverlay;import com.tianditu.android.maps.MapView;import com.tianditu.android.maps.OverlayItem;import com.yongnuo.mccms.entity.Parts;import com.yongnuo.mccms.ui.activity.PartsInfoActivity;import java.util.ArrayList;import java.util.List;public class DrawPointUtils extends ItemizedOverlay<OverlayItem> { PRivate Context mContext; private MapView mMapView; private ArrayList<Parts> mPointList; private ArrayList<OverlayItem> gpList = new ArrayList<OverlayItem>(); private Drawable mDrawable; private List<Parts> mCovers; public DrawPointUtils(Drawable drawable, Context context, MapView mapview, ArrayList<Parts> list, List<Parts> covers) { super(drawable); mContext = context; mMapView = mapview; mPointList = list; mDrawable = drawable; mCovers = covers; for (int i = 0; i < list.size(); i++) { Parts p = list.get(i); double lon = Double.valueOf(p.getLongitude()); double lat = Double.valueOf(p.getLatitude()); GeoPoint gp = new GeoPoint((int) (lat * 1E6), (int) (lon * 1E6)); gpList.add(new OverlayItem(gp, "T" + i, "point" + i)); } populate(); if (gpList != null && gpList.size() > 0) { mMapView.getController().setCenter(gpList.get(0).getPoint()); } } @Override protected boolean onTap(int arg0) { super.onTap(arg0); IntentUtils.startActivity(mContext, PartsInfoActivity.ACTION_FLAG_PATRS,mCovers.get(arg0), PartsInfoActivity.class); return true; } @Override protected OverlayItem createItem(int arg0) { if (gpList != null) { return gpList.get(arg0); } return null; } @Override public int size() { if (gpList != null) { return gpList.size(); } return 0; } public void addItem(OverlayItem overlayItem) { overlayItem.setMarker(mDrawable); gpList.add(overlayItem); } @Override public boolean onKeyUp(int keyCode, KeyEvent arg1, MapView arg2) { if (keyCode == KeyEvent.KEYCODE_BACK) System.exit(0); return super.onKeyUp(keyCode, arg1, arg2); }}

2、在地图上根据点画出一条线

package com.yongnuo.mcms.utils;import android.content.Context;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.Paint.Style;import android.graphics.Path;import android.graphics.Point;import com.tianditu.android.maps.GeoPoint;import com.tianditu.android.maps.MapView;import com.tianditu.android.maps.Overlay;import com.tianditu.android.maps.Projection;import java.util.ArrayList;public class DrawLineUtil { private ArrayList<GeoPoint> mGeoPointList; private MapView mMapView; private Context mContext; public DrawLineUtil(Context context, ArrayList<GeoPoint> list, MapView mapView) { mContext = context; mGeoPointList = list; mMapView = mapView; if(list != null && list.size() > 0){ DrawOverlay mDrivingOverlay = new DrawOverlay(context); mMapView.getOverlays().add(mDrivingOverlay); mMapView.getController().animateTo(list.get(list.size() - 1)); mMapView.postInvalidate(); } } class DrawOverlay extends Overlay { public DrawOverlay(Context context) { } @Override public void draw(Canvas canvas, MapView mapView, boolean shadow) { super.draw(canvas, mapView, shadow); ArrayList<Point> PL = new ArrayList<Point>(); Point[] pointScr = convertPoints(mapView.getProjection(),mGeoPointList); Paint paint = new Paint(); paint.setAntiAlias(true); paint.setStrokeWidth(5); paint.setStyle(Style.STROKE); paint.setColor(Color.RED); Path path = new Path(); path.moveTo(pointScr[0].x, pointScr[0].y); Point point = null; Projection projection = mapView.getProjection(); for (int i = 1; i < pointScr.length; i++) { path.lineTo(pointScr[i].x, pointScr[i].y); point = new Point(); projection.toPixels(mGeoPointList.get(i), point); PL.add(point); } canvas.drawPath(path, paint); path.reset();// Drawable mDrawableStart = (Drawable) mContext.getResources().getDrawable(R.mipmap.icon_route_start);// Drawable mDrawableEnd = (Drawable) mContext.getResources().getDrawable(R.mipmap.icon_route_end);// //起点// int wid = mDrawableStart.getIntrinsicWidth();// int height = mDrawableStart.getIntrinsicHeight();// if(PL != null && PL.size() > 0){// mDrawableStart.setBounds(PL.get(0).x - wid / 2, PL.get(0).y - height, PL.get(0).x + wid / 2,PL.get(0).y);// mDrawableStart.draw(canvas);// }//// //终点// wid = mDrawableEnd.getIntrinsicWidth();// height = mDrawableEnd.getIntrinsicHeight();// if(PL != null && PL.size() > 0){// Point endPoint = PL.get(PL.size() - 1);// mDrawableEnd.setBounds(endPoint.x - wid / 2, endPoint.y - height, endPoint.x + wid / 2, endPoint.y);// mDrawableEnd.draw(canvas);// } } private Point[] convertPoints(Projection prj, ArrayList<GeoPoint> points) { Point[] ptsRet = new Point[points.size()]; for (int i = 0; i < ptsRet.length; i++) { ptsRet[i] = prj.toPixels(points.get(i), null); } return ptsRet; } }}

3、使用方法

画点使用方法Marker marker = getResources().getDrawable(R.mipmap.ic_pointblack);List<Points> mPointList = new ArrayList<Points>();mMapView.getOverlays().add(new DrawPointUtils(marker, this, mMapView, mPointList, covers));画线使用方法ArrayList<GeoPoint> list = new ArrayList<GeoPoint>();new DrawLineUtil(this,list,mMapView);

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