【发布时间】：2011-02-01 20:53:04
【问题描述】：
有点奇怪的帖子，因为这是我之前发布的内容，以为已经解决但没有！
我有一种情况，我需要为每个标记使用自定义 Drawable，我需要的效果是将标记旋转一定的度数，并且可能完全走错了路。
作为开始，我使用了优秀的知识共享，因为它确实有效，并且只有在我添加后才会中断！
https://github.com/commonsguy/cw-advandroid/tree/master/Maps/NooYawkAsync
上一篇文章和代码在这里
Android Maps NullPointerException ItemizedOverlay
如果有人能推荐一种更好、更稳定的方法来获得旋转的 Drawable 并让我走上正确的道路，那就太好了。
从我的代码中可以看出，我没有在叠加层中设置 Drawable，而是在另一个对象中执行此操作，并怀疑这就是它崩溃的原因！
目前我通过这样做来设置我的 Drawable...
public Drawable getRotatedIcon(String string) {
Drawable marker = null;
Double tempHeading = Double.valueOf(string);
long intHeading = Math.round(tempHeading / 10);
int resID = getResources().getIdentifier(
"icon_rotate_" + Long.toString(intHeading), "drawable",
"com.test.testapp");
marker = getResources().getDrawable(resID);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),marker.getIntrinsicHeight());
return marker;
}
然后我用这个来创建它...
if (sites != null){
sites.clearItems();
}else{
sites = new SitesOverlay();
}
for (int i = 0; i < getMainOverlayArray().size(); i++) {
tempOver = getMainOverlayArray().get(i);
tempOver.setMarker(getRotatedIcon(tempOver.getcourse()));
if (tempOver != null){
sites.addItem(tempOver);
}
}
sites.finishedLoading();
还有我的 SitesOverlay 类...
private class SitesOverlay extends ItemizedOverlay<pfOverlayItem> {
private List<pfOverlayItem> items = new ArrayList<pfOverlayItem>();
private PopupPanel panel=new PopupPanel(R.layout.popup);
private MapLocation selectedMapLocation;
private static final int CIRCLERADIUS = 2;
private ArrayList<pfOverlayItem> mOverlays = new ArrayList<pfOverlayItem>();
public SitesOverlay() {
super(null);
populate();
}
public void finishedLoading(){
populate();
}
@Override
protected pfOverlayItem createItem(int i) {
return (items.get(i));
}
public void addItem(OverlayItem overlay) {
overlay.setMarker(boundCenter(overlay.getMarker(0)));
items.add((pfOverlayItem) overlay);
}
public void clearItems(){
runOnUiThread(new Runnable() {
public void run() {
items.clear();
myMapView.invalidate();
}
});
}
public void clear() {
mOverlays.clear();
myMapView.removeAllViews();
setLastFocusedIndex(-1);
populate();
}
@Override
public void draw(Canvas canvas, MapView mapView, boolean shadow) {
super.draw(canvas, mapView, false);
try {
if (getMainOverlayArray().size() != 0){
pfOverlayItem tempOver = null;
for (int i = 0; i < getMainOverlayArray().size(); i++) {
tempOver = getMainOverlayArray().get(i);
boolean isMatch = false;
//Log.i("Selected Name",selectedName);
if (tempOver.getTitle().equals(selectedName))
{
isMatch = true;
}
if (isMatch){
Projection projection = mapView.getProjection();
Point point = new Point();
projection.toPixels(tempOver.getPoint(), point);
Paint background = new Paint();
background.setColor(Color.WHITE);
background.setAlpha(150);
RectF rect = new RectF();
rect.set(point.x - 50, point.y +15,
point.x + 90, point.y + 50);
canvas.drawRoundRect(rect, 5, 5, background);
Paint text = new Paint();
text.setAntiAlias(true);
text.setColor(Color.BLUE);
text.setTextSize(14);
text.setTypeface(Typeface.MONOSPACE);
canvas.drawText(tempOver.getTitle() + " " + tempOver.getcallsign(), point.x -50 , point.y + 30, text);
canvas.drawText(tempOver.getdestination() + " " + tempOver.getdraft(), point.x -50 , point.y + 45, text);
}
}
}
}catch (Exception e){
Log.e("Error", "Problem drawing view", e);
e.printStackTrace();
}
}
@Override
protected boolean onTap(int i) {
pfOverlayItem item = getItem(i);
if (selectedName.equals(item.getTitle())){
try{
Intent myIntent = new Intent(TestApp.this, DetailActivity.class);
myIntent.putExtra( "int", i);
myIntent.putExtra( "string", selectedName );
PlaneFinderMain.this.startActivity(myIntent);
}catch (Exception e){
Log.e("Error", "Cannot launch", e);
}
}
currentadshex = item.getmmsi();
new GetRouteTask(item.getmmsi()).execute();
selectedItem = i;
selectedName = item.getTitle();
selectedPlanePoint = item.getPoint();
GeoPoint geo=item.getPoint();
Point pt=myMapView.getProjection().toPixels(geo, null);
View view=panel.getView();
((TextView)view.findViewById(R.id.reg)).setText(item.getTitle());
((TextView)view.findViewById(R.id.callsign)).setText(item.getcallsign());
((TextView)view.findViewById(R.id.dest)).setText(item.getdestination());
((TextView)view.findViewById(R.id.draft)).setText(item.getdraft());
return (true);
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView) {
if (event.getAction() == MotionEvent.ACTION_DOWN){
if (selectedPlanePoint != null){
Projection projection = mapView.getProjection();
Point point = new Point();
projection.toPixels(selectedPlanePoint, point);
Point pointHit = new Point();
pointHit.x=(int)event.getX();
pointHit.y=(int)event.getY();
if ((point.x - pointHit.x) >-100 && (point.x - pointHit.x) <70 && (point.y - pointHit.y) < -25 && (point.y - pointHit.y) > -95){
try{
Intent myIntent = new Intent(TestApp.this, DetailActivity.class);
myIntent.putExtra( "int", selectedItem);
myIntent.putExtra( "string", selectedName );
TestApp.this.startActivity(myIntent);
}catch (Exception e){
Log.e("Error", "Cannot launch", e);
}
}else{
}
}
}
return false;
}
@Override
public int size() {
return (items.size());
}
public void addOverlay(OverlayItem o){
setLastFocusedIndex(-1);
populate();
}
}
【问题讨论】：
标签： android drawable itemizedoverlay