我现在正在开发 GPS 跟踪器，对此我知之甚少。我有一些与我的应用程序整体相关的问题。
- 当我们点击覆盖项目时如何创建气泡？我正在为地图视图创建一个类地图，为覆盖项创建另一个类......在我的类地图中，我使用广播接收器来接收不断变化的 GPS 坐标......这是一个好兆头吗？
- 我要创建 GPS 跟踪器应用程序，我的应用程序结构应该是什么？（我们创建它的方式是为了简单并具有更多显示热点的功能，朋友......）
问问题
1370 次
1 回答
1
嗨结帐此帖子答案以在谷歌地图中显示信息窗口/气泡
Its duplicate answer
我在下面提供的链接中的代码也相同：
public class MapLocationOverlay extends Overlay {
private boolean isNameAddHold=true;
private Bitmap bitmap,bitCross,bitMoreInformation;
int testX,testY,count=0;
int infoWindowOffsetX,infoWindowOffsetY;
public String name,address,argName,argAddress,argid;
// Store these as global instances so we don't keep reloading every time
private Bitmap bubbleIcon, shadowIcon;
private MapLocationViewer mapLocationViewer;
double toLat, toLng;
private Paint innerPaint, borderPaint, textPaint;
private boolean isRemovePriorPopup=false;
private boolean temp=true,first=true, firstDraw = true;
public boolean tempDefaule=true;
public MoreInformation myMoreInformation;
public PantryLocation location;
// The currently selected Map Location...if any is selected. This tracks whether an information
// window should be displayed & where...i.e. whether a user 'clicked' on a known map location
private PantryLocation selectedMapLocation;
public MapLocationOverlay(MapLocationViewer mapLocationViewer,PantryLocation arglocation) {
this.mapLocationViewer = mapLocationViewer;
location=arglocation;
bubbleIcon = BitmapFactory.decodeResource(mapLocationViewer.getResources(),R.drawable.bubble);
shadowIcon = BitmapFactory.decodeResource(mapLocationViewer.getResources(),R.drawable.shadow);
bitmap = BitmapFactory.decodeResource(mapLocationViewer.getResources(),R.drawable.infowindow);
bitCross = BitmapFactory.decodeResource(mapLocationViewer.getResources(),R.drawable.crass);
bitMoreInformation = BitmapFactory.decodeResource(mapLocationViewer.getResources(),R.drawable.more_informations_new);
}
@Override
public boolean onTouchEvent(MotionEvent e, MapView mapView) {
// TODO Auto-generated method stub
if (e.getAction() == 0)
{
this.tempDefaule=false;
}
if (e.getAction() == 1)
{
this.tempDefaule=false;
}
if (e.getAction() == 2)
{
this.tempDefaule=false;
}
return super.onTouchEvent(e, mapView);
}
@Override
public boolean onTap(GeoPoint p, MapView mapView) {
//this.tempDefaule=false;
// Store whether prior popup was displayed so we can call invalidate() & remove it if necessary.
// Next test whether a new popup should be displayed
selectedMapLocation = getHitMapLocation(mapView,p);
mapView.invalidate();
// Lastly return true if we handled this onTap()
return selectedMapLocation != null;
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
drawMapLocations(canvas, mapView, shadow);
//this.tempDefaule=false;
drawInfoWindow(canvas, mapView, shadow);
//this.tempDefaule=false;
}
/**
* Test whether an information balloon should be displayed or a prior balloon hidden.
*/
private PantryLocation getHitMapLocation(MapView mapView, GeoPoint tapPoint) {
// Track which MapLocation was hit...if any
PantryLocation hitMapLocation = null;
RectF hitTestRecr = new RectF();
Point screenCoords = new Point();
ArrayList<PantryLocation> iterator =mapLocationViewer.getMapLocations();
for(int i=0;i<iterator.size();i++) {
PantryLocation testLocation = iterator.get(i);
// Translate the MapLocation's lat/long coordinates to screen coordinates
mapView.getProjection().toPixels(testLocation.getPoint(), screenCoords);
// Create a 'hit' testing Rectangle w/size and coordinates of our icon
// Set the 'hit' testing Rectangle with the size and coordinates of our on screen icon
hitTestRecr.set(-bubbleIcon.getWidth()/2,-bubbleIcon.getHeight(),bubbleIcon.getWidth()/2,0);
hitTestRecr.offset(screenCoords.x,screenCoords.y);
// Finally test for a match between our 'hit' Rectangle and the location clicked by the user
mapView.getProjection().toPixels(tapPoint, screenCoords);
//hitMapLocation = testLocation;
if (hitTestRecr.contains(screenCoords.x,screenCoords.y)) {
hitMapLocation = testLocation;
first = true;
isNameAddHold = true;
break;
}
}
testX=(int)screenCoords.x;
testY=(int)screenCoords.y;
// Lastly clear the newMouseSelection as it has now been processed
tapPoint = null;
if(hitMapLocation==null && selectedMapLocation!=null)
return selectedMapLocation;
return hitMapLocation;
}
private void drawMapLocations(Canvas canvas, MapView mapView, boolean shadow) {
int i=0;count++;
ArrayList<PantryLocation> iterator =mapLocationViewer.getMapLocations();
Point screenCoords = new Point();
for(i=0;i<iterator.size();i++) {
PantryLocation location = iterator.get(i);
mapView.getProjection().toPixels(location.getPoint(), screenCoords);
//mapView.getController().setCenter(location.getPoint());
if (shadow) {
// Only offset the shadow in the y-axis as the shadow is angled so the base is at x=0;
canvas.drawBitmap(shadowIcon, screenCoords.x, screenCoords.y - shadowIcon.getHeight(),null);
} else {
canvas.drawBitmap(bubbleIcon, screenCoords.x - bubbleIcon.getWidth()/2, screenCoords.y - bubbleIcon.getHeight(),null);
}
}
// if(i==iterator.size()){
// this.tempDefaule=false;}
if(tempDefaule==true)
{
PantryLocation location1 = this.location;
//mapView.getProjection().toPixels(location.getPoint(), screenCoords);
Point screenCoord = new Point();
mapView.getController().setCenter(location1.getPoint());
mapView.getController().setZoom(15);
// tempDefaule=false;
//mapView.getController().setCenter(location.getPoint());
}
//tempDefaule=false;
} //mapView.getProjection().toPixels(location.getPoint(), screenCoord);
//canvas.drawBitmap(bubbleIcon, screenCoord.x - bubbleIcon.getWidth()/2, screenCoord.y - bubbleIcon.getHeight(),null);
//mapView.invalidate();
private void drawInfoWindow(Canvas canvas, MapView mapView, boolean shadow) {
//this.tempDefaule=false;
if ( selectedMapLocation != null) {
if ( shadow) {
// Skip painting a shadow in this tutorial
} else {
// First determine the screen coordinates of the selected MapLocation
isRemovePriorPopup=true;
Point selDestinationOffset = new Point();
mapView.getProjection().toPixels(selectedMapLocation.getPoint(), selDestinationOffset);
// Setup the info window with the right size & location
int INFO_WINDOW_WIDTH = 125;
int INFO_WINDOW_HEIGHT = 25;
RectF infoWindowRect = new RectF(0,0,100,20);
RectF closeRect = new RectF(0,0,20,20);
infoWindowOffsetX = selDestinationOffset.x-INFO_WINDOW_WIDTH/2;
infoWindowOffsetY = selDestinationOffset.y-INFO_WINDOW_HEIGHT-bubbleIcon.getHeight();
infoWindowRect.offset(infoWindowOffsetX+95,infoWindowOffsetY-45);
closeRect.offset(infoWindowOffsetX+160,infoWindowOffsetY-90);
Paint myPaintBlack=new Paint();
Paint myPaintWhite=new Paint();
myPaintWhite.setARGB(255, 255, 255, 255);
// Draw inner info window
canvas.drawRoundRect(infoWindowRect, 5, 5, getInnerPaint());
// Draw border for info window
canvas.drawRoundRect(infoWindowRect, 5, 5, getBorderPaint());
// Draw the MapLocation's name
myPaintBlack.setColor(Color.BLACK);
myPaintBlack.setTextSize(20);
canvas.drawBitmap(bitmap, infoWindowOffsetX-50, infoWindowOffsetY-100,getInnerPaint());
if(isNameAddHold)
{
argid=selectedMapLocation.getID();
argName=selectedMapLocation.getName();
name=selectedMapLocation.getName();
toLat = selectedMapLocation.getLatitude();
toLng = selectedMapLocation.getLongitude();
if(name.length()>18)
name=selectedMapLocation.getName().substring(0,18)+"..";
argAddress=selectedMapLocation.getAddress();
address=selectedMapLocation.getAddress();
if(address.length()>30)
address=selectedMapLocation.getAddress().substring(0,30)+"..";
}
canvas.drawText(name,infoWindowOffsetX-45,infoWindowOffsetY-70,myPaintBlack);
myPaintBlack.setTextSize(13);
canvas.drawText(address,infoWindowOffsetX-45,infoWindowOffsetY-55,myPaintBlack);
// Draw inner info window
canvas.drawRoundRect(infoWindowRect, 5, 5, getInnerPaint());
// Draw border for info window
canvas.drawRoundRect(infoWindowRect, 5, 5, getBorderPaint());
// Draw the MapLocation's name
myPaintBlack.setColor(Color.CYAN);
myPaintBlack.setTextSize(11);
//canvas.drawText("Click for more info..",infoWindowOffsetX+105,infoWindowOffsetY-33,myPaintBlack);
canvas.drawBitmap(bitMoreInformation, infoWindowOffsetX+95, infoWindowOffsetY-45,getInnerPaint());
//canvas.drawBitmap(bitCross, infoWindowOffsetX+160, infoWindowOffsetY-90,getInnerPaint());
}
}
if(isRemovePriorPopup)
{
if(((testX>(infoWindowOffsetX+95)&&testX<(infoWindowOffsetX+195)))&&(testY>(infoWindowOffsetY-45)&&testY<(infoWindowOffsetY-25)))
{
if(temp){
try
{
temp=false;
isNameAddHold=false;
isRemovePriorPopup=false;
Context context=mapLocationViewer.cn;
Toast.makeText(context, "Loading...", Toast.LENGTH_SHORT).show();
Intent intent=new Intent(context, MoreInformation.class);
intent.putExtra("Id",argid);
intent.putExtra("Name",argName);
intent.putExtra("Address",argAddress);
intent.putExtra("Latitude",toLat);
intent.putExtra("Longitude",toLng);
context.startActivity(intent);
}
catch (Exception ex)
{
Log.d("Redirected Error :", ex.getMessage());
}
//canvas.drawText("This is for Testing",testX,testY,myPaintBlack);
}}
else if(((testX>(infoWindowOffsetX+160)&&testX<(infoWindowOffsetX+180)))&&(testY>(infoWindowOffsetY-90)&&testY<(infoWindowOffsetY-70)))
{
if(isRemovePriorPopup)
{
isRemovePriorPopup=false;
selectedMapLocation=null;
draw(canvas, mapView, shadow);
// mapLocationViewer.setDZoom();
}
}
}
}
public Paint getInnerPaint() {
if ( innerPaint == null) {
innerPaint = new Paint();
innerPaint.setARGB(225, 75, 75, 75); //gray
innerPaint.setAntiAlias(true);
}
return innerPaint;
}
public Paint getBorderPaint() {
if ( borderPaint == null) {
borderPaint = new Paint();
borderPaint.setARGB(255, 255, 255, 255);
borderPaint.setAntiAlias(true);
borderPaint.setStyle(Style.STROKE);
borderPaint.setStrokeWidth(2);
}
return borderPaint;
}
public Paint getTextPaint() {
if ( textPaint == null) {
textPaint = new Paint();
textPaint.setARGB(255, 255, 255, 255);
textPaint.setAntiAlias(true);
}
return textPaint;
}
}
于 2011-08-03T10:04:52.270 回答