我希望在iPhone中实现滴针动画到标记。问题是引脚没有像他们在这个链接中那样掉落： http://googlegeodevelopers.blogspot.com/2010/12/map-markers-they-move.html 。 我添加了我的示例代码。 请帮助实现动画。
public class MyMapAnimation extends MapActivity {
private MapView map = null;
private MyLocationOverlay me = null;
ImageView imageView = null;
Projection proj = null;
private Drawable marker;
private ArrayList<OverlayItem> itemsArrayList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Log.i("NooYawk","onCreate");
itemsArrayList = new ArrayList<OverlayItem>();
itemsArrayList.add(new OverlayItem(getPoint(40.748963847316034,
-73.96807193756104), "UN", "United Nations"));
itemsArrayList.add(new OverlayItem(getPoint(40.76866299974387,
-73.98268461227417), "Lincoln Center",
"Home of Jazz at Lincoln Center"));
itemsArrayList.add(new OverlayItem(getPoint(40.765136435316755,
-73.97989511489868), "Carnegie Hall",
"Where you go with practice, practice, practice"));
itemsArrayList.add(new OverlayItem(getPoint(40.70686417491799,
-74.01572942733765), "The Downtown Club",
"Original home of the Heisman Trophy"));
map = (MapView) findViewById(R.id.map);
map.getController().setCenter(getPoint(40.748963847316034,
-73.96807193756104));
/* map.getController().setCenter(
getPoint(40.748963847316034, -73.96807193756104));*/
map.getController().setZoom(12);
map.setBuiltInZoomControls(true);
marker = getResources().getDrawable(R.drawable.marker);
proj = map.getProjection();
imageView = new ImageView(this);
imageView.setBackgroundResource(R.drawable.marker);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),
marker.getIntrinsicHeight());
map.getOverlays().add(new SitesOverlay(marker));
me = new MyLocationOverlay(this, map);
map.getOverlays().add(me);
/*
* map.getController().animateTo( getPoint(40.748963847316034,
* -73.96807193756104));
*/
}
@Override
public void onResume() {
super.onResume();
me.enableCompass();
Log.i("NooYawk","onResume");
}
@Override
public void onPause() {
super.onPause();
Log.i("NooYawk","onPause");
me.disableCompass();
}
@Override
protected boolean isRouteDisplayed() {
Log.i("NooYawk","isRouteDisplayed");
return (false);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_S) {
map.setSatellite(!map.isSatellite());
return (true);
} else if (keyCode == KeyEvent.KEYCODE_Z) {
map.displayZoomControls(true);
return (true);
}
return (super.onKeyDown(keyCode, event));
}
private GeoPoint getPoint(double lat, double lon) {
Log.i("NooYawk","getPoint");
return (new GeoPoint((int) (lat * 1000000.0), (int) (lon * 1000000.0)));
}
private class SitesOverlay extends ItemizedOverlay<OverlayItem> {
private List<OverlayItem> items = new ArrayList<OverlayItem>();
private Drawable marker = null;
private OverlayItem inDrag = null;
private ImageView dragImage = null;
private int xDragImageOffset = 0;
private int yDragImageOffset = 0;
private int xDragTouchOffset = 0;
private int yDragTouchOffset = 0;
Point p = new Point(0, 0);
private RelativeLayout relativeLayout;
private ArrayList<ImageView> imageViewArrayList;
public SitesOverlay(Drawable marker) {
super(marker);
this.marker = marker;
Log.i("NooYawk","SitesOverlay");
dragImage = (ImageView) findViewById(R.id.drag);
Log.d("POint",
""
+ (map.getProjection().toPixels(
getPoint(40.748963847316034,
-73.96807193756104), p).x)
+ ","
+ (map.getProjection().toPixels(
getPoint(40.748963847316034,
-73.96807193756104), p).y));
TranslateAnimation translateAnimation = null;
imageViewArrayList = new ArrayList<ImageView>();
for (OverlayItem currentOverlayItem : itemsArrayList) {
Log.i("NooYawk","currentOverlayItem");
imageView = new ImageView(NooYawk.this);
imageView.setBackgroundResource(R.drawable.marker);
relativeLayout = (RelativeLayout) findViewById(R.id.rl_map_main);
RelativeLayout.LayoutParams param = new RelativeLayout.LayoutParams(
LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
param.leftMargin = getWindowManager().getDefaultDisplay()
.getWidth() / 2;
param.topMargin = 0;
relativeLayout.addView(imageView, param);
imageViewArrayList.add(imageView);
}
int count = 0;
Log.i("x for translate before animation",
(map.getProjection().toPixels(
itemsArrayList.get(0).getPoint(), p).x)+"");
for (ImageView currentImageView : imageViewArrayList) {
Log.i("NooYawk","currentImageView");
translateAnimation = new TranslateAnimation((map
.getProjection().toPixels(
itemsArrayList.get(count).getPoint(), p).x),
(map.getProjection().toPixels(
itemsArrayList.get(count).getPoint(), p).x), 0,
(map.getProjection().toPixels(
itemsArrayList.get(count).getPoint(), p).y));
translateAnimation.setDuration(2000);
currentImageView.startAnimation(translateAnimation);
count++;
}
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Log.i("NooYawk","run");
// relativeLayout.removeView(imageView);
for (ImageView currentImageView : imageViewArrayList) {
Log.i("NooYawk","thread : currentImageView");
currentImageView.setVisibility(View.INVISIBLE);
}
setItemValues();
populate();
Log.i("x for translate after animation",
(map.getProjection().toPixels(
itemsArrayList.get(0).getPoint(), p).x)+"");
}
}, translateAnimation.getDuration());
}
private void setItemValues() {
int count = 0;
Log.i("NooYawk","setItemVAlues");
for (OverlayItem currentOverlayItem : itemsArrayList) {
items.add(currentOverlayItem);
Log.i("items ", items.get(count).getPoint()+"");
count++;
}
}
@Override
protected OverlayItem createItem(int i) {
Log.i("NooYawk","createitem");
return (items.get(i));
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
// items.get(0)
Log.i("NooYawk","draw");
boundCenterBottom(marker);
}
@Override
public int size() {
Log.i("NooYawk","size");
return (items.size());
}
}
}
答案 0 :(得分：3)
我发布的核心概念是将mapView中的drop pin动画与iPhopne一起发布。 同样可以与叠加层集成....
Drawable drawableImage = this.getResources().getDrawable(R.drawable.marker);
myCustomOverlay = new CustomOverlay(drawableImage, mapView);
initGeoPoint = new GeoPoint((int) (latitudeArray[i] * 1E6),(int) (longitudeArray[i] * 1E6));
OverlayItem overlayItem = new OverlayItem(initGeoPoint,getLocationAddress(latitudeArray[i], longitudeArray[i]),"xyz");
myCustomOverlay.addOverlay(overlayItem);
mapOverlays.add(myCustomOverlay);
RelativeLayout v = (RelativeLayout) View.inflate(getApplicationContext(),R.layout.marker_layout, null);
ImageView markerView = (ImageView) v.findViewById(R.id.marker_img_view);
AnimationSet animation = new AnimationSet(true);
TranslateAnimation translateAnimation = new TranslateAnimation(0.0f, 0.0f, -400.0f, 0.0f);
translateAnimation.setDuration(1000);
animation.addAnimation(translateAnimation);
markerView.startAnimation(animation);
mapView.addView(v,
new MapView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT,ViewGroup.LayoutParams.FILL_PARENT),
new GeoPoint((int) (latitude * 1E6),(int) (longitude * 1E6)),
MapView.LayoutParams.BOTTOM_CENTER));
mapView.invalidate();
marker_layout如下：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ImageView
android:id="@+id/marker_img_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:src="@drawable/marker" />
</RelativeLayout>
重叠类###########
public class CustomOverlay extends BalloonItemizedOverlay<OverlayItem> {
private ArrayList<OverlayItem> m_overlays = new ArrayList<OverlayItem>();
private Context c;
public CustomOverlay(Drawable defaultMarker, MapView mapView) {
super(boundCenter(defaultMarker), mapView);
c = mapView.getContext();
}
public void addOverlay(OverlayItem overlay) {
m_overlays.add(overlay);
populate();
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
if (!shadow) {
super.draw(canvas, mapView, false);
}
}
public void removeOverlay(OverlayItem overlay) {
m_overlays.remove(overlay);
populate();
}
@Override
protected OverlayItem createItem(int i) {
return m_overlays.get(i);
}
@Override
public int size() {
return m_overlays.size();
}
@Override
protected boolean onBalloonTap(int index, OverlayItem item) {
Toast.makeText(
c,
"onBalloonTap for overlay index " + index + " Item"
+ item.getTitle(), Toast.LENGTH_LONG).show();
String id = "";
return true;
}
}
答案 1 :(得分：1)
在MapView上设置动画项目的最佳方法是不使用视图，而是为叠加层设置动画。
这是我用来处理动画地图标记的类，以复制你在iPhone上获得的漂亮效果的行为。在这种情况下，我正在添加标记来指示企业，因此它所说的“商业”只是指标记。此代码尚未在许多设备上进行过测试。我知道投影类可能存在一些可能导致问题的问题，因此不要将此代码视为稳定并进行相应处理。
import java.util.ArrayList;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Point;
import android.os.AsyncTask;
import android.widget.AdapterView.OnItemClickListener;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;
public class MarkerOverlay extends Overlay {
private ArrayList<Business> mOverlays = new ArrayList<Business>();
private Bitmap mBitmapMarker;
private Bitmap mBitmapShadow;
DropMarkersTask animateMarkers;
OnItemClickListener itemClickedListener;
public MarkerOverlay(Bitmap defaultMarker) {
mBitmapMarker = defaultMarker;
// Create shadow bitmap. Basically a black version of the image
mBitmapShadow = defaultMarker.copy(Bitmap.Config.ARGB_8888, true);
for(int x = 0;x < mBitmapShadow.getWidth();x++)
for(int y = 0;y < mBitmapShadow.getHeight();y++)
if(mBitmapShadow.getPixel(x, y) != Color.TRANSPARENT) // This is a little lazy but it works
mBitmapShadow.setPixel(x, y, Color.BLACK);
}
public void setOnItemClickListener(OnItemClickListener clickListener) {
this.itemClickedListener = clickListener;
}
public void addBusiness(Business overlay) {
for(Business business : mOverlays) {
if(overlay.getPoint().getLatitudeE6() == business.getPoint().getLatitudeE6() &&
overlay.getPoint().getLongitudeE6() == overlay.getPoint().getLongitudeE6()) {
// Don't add any markers which exist at exactly the same location, chances are it's the same marker
return;
} else if (overlay.getPoint().getLatitudeE6() > business.getPoint().getLatitudeE6()) {
// This is so all the markers are listed top to bottom
mOverlays.add(mOverlays.indexOf(business), overlay);
return;
}
}
mOverlays.add(overlay);
}
public Business getItem(int position) {
return mOverlays.get(position);
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
Projection projection = mapView.getProjection();
boolean animationRequired = false;
// Find the bounds in which the markers must reside to be displayed
GeoPoint bottomLeft = projection.fromPixels(- mBitmapMarker.getWidth() / 2, mapView.getHeight() + mBitmapMarker.getHeight());
GeoPoint topRight = projection.fromPixels(mapView.getWidth() + mBitmapMarker.getWidth() / 2, 0);
for(Business business : mOverlays) {
// Check to ensure the marker is inside the bounds
if(business.getPoint().getLatitudeE6() > bottomLeft.getLatitudeE6() && business.getPoint().getLatitudeE6() < topRight.getLatitudeE6()
&& business.getPoint().getLongitudeE6() > bottomLeft.getLongitudeE6() && business.getPoint().getLongitudeE6() < topRight.getLongitudeE6()) {
if(business.isNewPoint()) {
business.setOffset(mapView.getHeight());
business.setOldPoint();
}
Point pt = new Point();
projection.toPixels(business.getPoint() ,pt);
if(shadow) {
// Set the location of the shadow according to the offset so it appears to come in from the top right
pt.x = pt.x + (mBitmapMarker.getWidth() / 4) + ((int)business.getOffset() / 2);
pt.y = pt.y - (mBitmapMarker.getHeight() / 2) - ((int)business.getOffset() / 2);
// Skew the shadow and set the location
Matrix matrix = new Matrix();
matrix.preSkew(-0.8f, 0f);
matrix.preScale(1f, 0.5f);
matrix.postTranslate(pt.x, pt.y);
// Change transparency according to the offset
Paint paint = new Paint();
paint.setAlpha((int)(((mapView.getHeight() - business.getOffset()) / mapView.getHeight()) * 100));
// Draw it
canvas.drawBitmap(mBitmapShadow, matrix, paint);
} else {
// Set the position according to the offset
pt.x = pt.x - (mBitmapMarker.getWidth() / 2);
pt.y = pt.y - mBitmapMarker.getHeight() - (int)business.getOffset();
canvas.drawBitmap(mBitmapMarker, (float)pt.x, (float)pt.y, null);
if(business.getOffset() > 0) {
animationRequired = true;
}
}
}
}
// Start the animation task if it hasn't already been started
if(animationRequired && (animateMarkers == null || animateMarkers.getStatus() != AsyncTask.Status.RUNNING)) {
animateMarkers = new DropMarkersTask();
animateMarkers.execute(mapView);
}
}
@Override
public boolean onTap(GeoPoint point, MapView map) {
if(itemClickedListener == null) {
return false;
}
Projection projection = map.getProjection();
int imageWidth = mBitmapMarker.getWidth();
int imageHeight = mBitmapMarker.getHeight();
// Find the point on the screen which has been clicked
Point clickPoint = new Point();
projection.toPixels(point, clickPoint);
// Go backwards through the businesses and find out if the location falls within their marker
for(int i = mOverlays.size() - 1; i >= 0; i--) {
Business business = mOverlays.get(i);
Point businessPoint = new Point();
projection.toPixels(business.getPoint(), businessPoint);
if(businessPoint.x > 0 && businessPoint.x < map.getWidth() &&
businessPoint.y > 0 && businessPoint.y < map.getHeight()) {
// Point is visible, so may clicked
int left = businessPoint.x - (imageWidth / 2);
int right = businessPoint.x + (imageWidth / 2);
int top = businessPoint.y - imageHeight;
int bottom = businessPoint.y;
if(clickPoint.x >= left && clickPoint.x <= right && clickPoint.y >= top && clickPoint.y <= bottom) { // Item has been clicked
// Adapter will be null as this isn't one. We will return the map
// in the view for consistency but most importantly the index of the item
itemClickedListener.onItemClick(null, map, i, 0);
return true;
}
}
}
return false;
}
class DropMarkersTask extends AsyncTask<MapView, Void, Void> {
MapView mapView;
@Override
protected Void doInBackground(MapView... mapViews) {
mapView = mapViews[0];
boolean mapUpdate = true;
try {
while(mapUpdate) {
Projection projection = mapView.getProjection();
GeoPoint bottomLeft = projection.fromPixels(- mBitmapMarker.getWidth() / 2, mapView.getHeight() + mBitmapMarker.getHeight());
GeoPoint topRight = projection.fromPixels(mapView.getWidth() + mBitmapMarker.getWidth() / 2, 0);
mapUpdate = false;
// Any visible markers with an offset higher than zero must be falling and therefore must be moved.
for(Business business : mOverlays) {
if(business.getPoint().getLatitudeE6() > bottomLeft.getLatitudeE6() && business.getPoint().getLatitudeE6() < topRight.getLatitudeE6()
&& business.getPoint().getLongitudeE6() > bottomLeft.getLongitudeE6() && business.getPoint().getLongitudeE6() < topRight.getLongitudeE6()) {
if(business.getOffset() > 0) {
// A nice Quadratic fall curve.
double currentY = Math.sqrt(mapView.getHeight() - business.getOffset());
currentY = currentY + 0.5;
double dropDistance = Math.pow(currentY, 2);
double newOffset = mapView.getHeight() - dropDistance;
if(newOffset < 0) { // Marker can't have an offset less than zero
newOffset = 0;
}
business.setOffset(newOffset);
mapUpdate = true;
}
}
}
if(mapUpdate) {
this.publishProgress();
Thread.sleep(20);
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onProgressUpdate(Void... unused) {
mapView.postInvalidate();
}
}
}
设置叠加层（最有可能在你的onCreate方法中）：
mapBusinesses = (EventMapView)findViewById(R.id.mapBusinesses);
mapOverlays = mapBusinesses.getOverlays();
Bitmap drawable = BitmapFactory.decodeResource(this.getResources(), R.drawable.map_pin);
businessMarkerOverlay = new MarkerOverlay(drawable);
businessMarkerOverlay.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {
Business business = businessMarkerOverlay.getItem(position);
AlertDialog.Builder dialog = new AlertDialog.Builder(MainActivity.class);
dialog.setTitle(business.getBusiness());
dialog.show();
}
});
mapOverlays.add(businessMarkerOverlay);
添加新标记： 不要忘记在地图上调用postInvalidate，以便在地图闲置时启动第一次绘制。
businessMarkerOverlay.addBusiness(business);
mapBusinesses.postInvalidate();
最后，这是我用于Business对象的类：
public class Business {
private String _business;
private int _businessId;
private GeoPoint _point;
private boolean _newPoint;
private double _offset;
public Business(GeoPoint point, String business, int businessId) {
_point = point;
_business = business;
_businessId = businessId;
_newPoint = true;
}
public int getBusinessId() { return _businessId; }
public String getBusiness() { return _business; }
public GeoPoint getPoint() { return _point; }
public boolean isNewPoint() { return _newPoint; }
public double getOffset() { return _offset; }
public void setOldPoint() { _newPoint = false; }
public void setOffset(double offset) { _offset = offset; }
}
答案 2 :(得分：1)
斯科特。我喜欢你的例子，但你的计算有点偏离。
这是应该的样子。
import java.util.ArrayList;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.Rect;
import android.os.AsyncTask;
import android.widget.AdapterView.OnItemClickListener;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import com.google.android.maps.Projection;
public class MarkerOverlay extends Overlay {
private ArrayList<Business> mOverlays = new ArrayList<Business>();
private Bitmap mBitmapMarker;
private Bitmap mBitmapShadow;
DropMarkersTask animateMarkers;
OnItemClickListener itemClickedListener;
public MarkerOverlay(Bitmap defaultMarker) {
mBitmapMarker = defaultMarker;
// Create shadow bitmap. Basically a black version of the image
mBitmapShadow = defaultMarker.copy(Bitmap.Config.ARGB_8888, true);
for(int x = 0;x < mBitmapShadow.getWidth();x++)
for(int y = 0;y < mBitmapShadow.getHeight();y++)
if(mBitmapShadow.getPixel(x, y) != Color.TRANSPARENT) // This is a little lazy but it works
mBitmapShadow.setPixel(x, y, Color.BLACK);
}
public void setOnItemClickListener(OnItemClickListener clickListener) {
this.itemClickedListener = clickListener;
}
public void addBusiness(Business overlay) {
for(Business business : mOverlays) {
if(overlay.getPoint().getLatitudeE6() == business.getPoint().getLatitudeE6() &&
overlay.getPoint().getLongitudeE6() == overlay.getPoint().getLongitudeE6()) {
// Don't add any markers which exist at exactly the same location, chances are it's the same marker
return;
} else if (overlay.getPoint().getLatitudeE6() > business.getPoint().getLatitudeE6()) {
// This is so all the markers are listed top to bottom
mOverlays.add(mOverlays.indexOf(business), overlay);
return;
}
}
mOverlays.add(overlay);
}
public Business getItem(int position) {
return mOverlays.get(position);
}
public static Rect getMapDrawingRect(MapView mapView, Bitmap marker) {
Rect mapDrawRect = new Rect();
mapView.getDrawingRect(mapDrawRect);
mapDrawRect.left = mapDrawRect.left - marker.getWidth(); // full marker width to include shadow
mapDrawRect.right = mapDrawRect.right + marker.getWidth()/2;
mapDrawRect.bottom = mapDrawRect.bottom + marker.getHeight(); // full height of marker
return mapDrawRect;
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, shadow);
Projection projection = mapView.getProjection();
boolean animationRequired = false;
Rect mapDrawRect = getMapDrawingRect(mapView, mBitmapMarker);
for(Business business : mOverlays) {
Point outPoint = new Point();
projection.toPixels(business.getPoint(), outPoint);
if (!mapDrawRect.contains(outPoint.x, outPoint.y)) {
continue;
}
if(business.isNewPoint()) {
business.setOffset(mapView.getHeight());
business.setOldPoint();
}
Point pt = new Point();
projection.toPixels(business.getPoint() ,pt);
if(shadow) {
// Set the location of the shadow according to the offset so it appears to come in from the top right
pt.x = pt.x + (mBitmapMarker.getWidth() / 4) + ((int)business.getOffset() / 2);
pt.y = pt.y - (mBitmapMarker.getHeight() / 2) - ((int)business.getOffset() / 2);
// Skew the shadow and set the location
Matrix matrix = new Matrix();
matrix.preSkew(-0.8f, 0f);
matrix.preScale(1f, 0.5f);
matrix.postTranslate(pt.x, pt.y);
// Change transparency according to the offset
Paint paint = new Paint();
paint.setAlpha((int)(((mapView.getHeight() - business.getOffset()) / mapView.getHeight()) * 100));
// Draw it
canvas.drawBitmap(mBitmapShadow, matrix, paint);
} else {
// Set the position according to the offset
pt.x = pt.x - (mBitmapMarker.getWidth() / 2);
pt.y = pt.y - mBitmapMarker.getHeight() - (int)business.getOffset();
canvas.drawBitmap(mBitmapMarker, (float)pt.x, (float)pt.y, null);
if(business.getOffset() > 0) {
animationRequired = true;
}
}
}
// Start the animation task if it hasn't already been started
if(animationRequired && (animateMarkers == null || animateMarkers.getStatus() != AsyncTask.Status.RUNNING)) {
animateMarkers = new DropMarkersTask();
animateMarkers.execute(mapView);
}
}
@Override
public boolean onTap(GeoPoint point, MapView map) {
if(itemClickedListener == null) {
return false;
}
Projection projection = map.getProjection();
int imageWidth = mBitmapMarker.getWidth();
int imageHeight = mBitmapMarker.getHeight();
// Find the point on the screen which has been clicked
Point clickPoint = new Point();
projection.toPixels(point, clickPoint);
// Go backwards through the businesses and find out if the location falls within their marker
for(int i = mOverlays.size() - 1; i >= 0; i--) {
Business business = mOverlays.get(i);
Point businessPoint = new Point();
projection.toPixels(business.getPoint(), businessPoint);
if(businessPoint.x > 0 && businessPoint.x < map.getWidth() &&
businessPoint.y > 0 && businessPoint.y < map.getHeight()) {
// Point is visible, so may clicked
int left = businessPoint.x - (imageWidth / 2);
int right = businessPoint.x + (imageWidth / 2);
int top = businessPoint.y - imageHeight;
int bottom = businessPoint.y;
if(clickPoint.x >= left && clickPoint.x <= right && clickPoint.y >= top && clickPoint.y <= bottom) { // Item has been clicked
// Adapter will be null as this isn't one. We will return the map
// in the view for consistency but most importantly the index of the item
itemClickedListener.onItemClick(null, map, i, 0);
return true;
}
}
}
return false;
}
class DropMarkersTask extends AsyncTask<MapView, Void, Void> {
MapView mapView;
@Override
protected Void doInBackground(MapView... mapViews) {
mapView = mapViews[0];
boolean mapUpdate = true;
try {
while(mapUpdate) {
Projection projection = mapView.getProjection();
Rect mapDrawRect = getMapDrawingRect(mapView, mBitmapMarker);
mapUpdate = false;
// Any visible markers with an offset higher than zero must be falling and therefore must be moved.
for(Business business : mOverlays) {
Point outPoint = new Point();
projection.toPixels(business.getPoint(), outPoint);
if (!mapDrawRect.contains(outPoint.x, outPoint.y)) {
continue;
}
if(business.getOffset() > 0) {
// A nice Quadratic fall curve.
double currentY = Math.sqrt(mapView.getHeight() - business.getOffset());
currentY = currentY + 0.5;
double dropDistance = Math.pow(currentY, 2);
double newOffset = mapView.getHeight() - dropDistance;
if(newOffset < 0) { // Marker can't have an offset less than zero
newOffset = 0;
}
business.setOffset(newOffset);
mapUpdate = true;
}
}
if(mapUpdate) {
this.publishProgress();
Thread.sleep(10);
}
}
} catch (InterruptedException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onProgressUpdate(Void... unused) {
mapView.postInvalidate();
}
}
}