[zip文件] Android Google Map 源码_轨迹回放 优化版本

/* * Copyright (C) 2007 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.ostrichmyself; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.graphics.Path; import android.graphics.Point; import android.os.Bundle; import android.os.Handler; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import com.google.android.maps.GeoPoint; import com.google.android.maps.MapActivity; import com.google.android.maps.MapController; import com.google.android.maps.MapView; import com.google.android.maps.Overlay; import com.google.android.maps.Projection; /** * 注意:记得修改Map APK Key * @author tiant5 * */ public class TraceMap extends MapActivity { private Handler timeHandler = new Handler(); private Button traceBegin; private MapView mapView; //WholeLineOverLay 的出台是为了播放完毕后删除之前的PlayOverLay, 避免总是重画 private WholeLineOverLay wholeLineOverLay; private GeoPoint[] pointArr; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); super.onCreate(savedInstanceState); setContentView(R.layout.trace_mapview); mapView = (MapView) findViewById(R.id.map); traceBegin = (Button) findViewById(R.id.traceBtn); traceBegin.setOnClickListener(new TraceBeginListener()); mapView.setClickable(true); mapView.setBuiltInZoomControls(true); MapController mapController = mapView.getController(); // mapView.setTraffic(true);// 交通图 // mapView.setSatellite(true);//卫星图 // mapView.setStreetView(true);//街景 pointArr = new GeoPoint[9]; mapController.setZoom(15);// 初始放大倍数 pointArr[0] = new GeoPoint(28238389, 113085616); pointArr[1] = new GeoPoint(28240846, 113085530); pointArr[2] = new GeoPoint(28245647, 113085659); pointArr[3] = new GeoPoint(28245610, 113092225); pointArr[4] = new GeoPoint(28245496, 113096817); pointArr[5] = new GeoPoint(28245458, 113102653); pointArr[6] = new GeoPoint(28241413, 113102782); pointArr[7] = new GeoPoint(28234683, 113102911); pointArr[8] = new GeoPoint(28233511, 113096774); wholeLineOverLay = new WholeLineOverLay(pointArr); mapController.animateTo(pointArr[4]); } class TraceBeginListener implements OnClickListener { public void onClick(View arg0) { /** * 另起线程, 实现动态描绘 */ final PlayOverLay playOverLay = new PlayOverLay(pointArr); synchronized(mapView.getOverlays()) { //有两个线程操作, 避免同步带来的问题 mapView.getOverlays().remove(wholeLineOverLay); mapView.getOverlays().add(playOverLay); } new Thread() { public void run() { for (int i = 0; i < pointArr.length - 1; i++) { //更新界面的动作需要放在Handler中处理, 否则无法移动界面 final int index = i; timeHandler.post(new Runnable() { public void run() { playOverLay.nextIndex(index); //失效, 引发对OverLay的调用 mapView.invalidate(); } }); try { Thread.sleep(500); } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } synchronized(mapView.getOverlays()) { ////有两个线程操作, 避免同步带来的问题 mapView.getOverlays().remove(playOverLay); mapView.getOverlays().add(wholeLineOverLay); } } }.start(); //整个图像 } } @Override protected boolean isRouteDisplayed() { return false; } //两点连起来, 就是一个线段 class PlayOverLay extends Overlay { private int currentIndex = -1; private GeoPoint[] pointArr; private Path path; public PlayOverLay(GeoPoint[] pointArr) { this.pointArr = pointArr; path = new Path(); } public void nextIndex(int nextIndex) { currentIndex = nextIndex; } public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { // TODO Auto-generated method stub super.draw(canvas, mapView, shadow); // 画笔 Paint paint = new Paint(); paint.setColor(Color.GREEN); paint.setDither(true); paint.setStyle(Paint.Style.STROKE); paint.setStrokeJoin(Paint.Join.ROUND); paint.setStrokeCap(Paint.Cap.ROUND); paint.setStrokeWidth(4); Projection projection = mapView.getProjection(); if (currentIndex == -1 || currentIndex + 1 >= pointArr.length) { return false; } GeoPoint first = pointArr[currentIndex]; GeoPoint second = pointArr[currentIndex + 1]; Point p1 = new Point(); projection.toPixels(first, p1); path.moveTo(p1.x, p1.y); Point p2 = new Point(); projection.toPixels(second, p2); path.lineTo(p2.x, p2.y); canvas.drawPath(path, paint);// 画出路径 return true; } } //两点连起来, 就是一个线段 class WholeLineOverLay extends Overlay { private GeoPoint[] pointArr; public WholeLineOverLay(GeoPoint[] pointArr) { this.pointArr = pointArr; } public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) { // TODO Auto-generated method stub super.draw(canvas, mapView, shadow); // 画笔 Paint paint = new Paint(); paint.setColor(Color.GREEN); paint.setDither(true); paint.setStyle(Paint.Style.STROKE); paint.setStrokeJoin(Paint.Join.ROUND); paint.setStrokeCap(Paint.Cap.ROUND); paint.setStrokeWidth(4); Projection projection = mapView.getProjection(); Path path = new Path(); for (int i = 0; i < pointArr.length -1; i++) { GeoPoint first = pointArr[i]; GeoPoint second = pointArr[i + 1]; Point p1 = new Point(); projection.toPixels(first, p1); path.moveTo(p1.x, p1.y); Point p2 = new Point(); projection.toPixels(second, p2); path.lineTo(p2.x, p2.y); } canvas.drawPath(path, paint);// 画出路径 return true; } } }