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嗨，所有我想导入一些源代码来测试显示在谷歌地图上的引脚，并拖动它们。虽然导入到Eclipse是成功的，我可以在我的设备上运行它们的地图不显示..是关于api的关键问题吗？我是否需要生成新的API键来显示它们？我被困任何人可以帮助..android无法显示谷歌地图
在这里，我已经导入项目
也在这里第二个链接的源代码。
public class rescue extends MapActivity {
private LocationManager myLocationManager;
private LocationListener myLocationListener;
private MapView myMapView;
private MapController myMapController;
private String provider;
private MyLocationOverlay me=null;
private int defaultLat =(int)(51.51216124955517);
private int defaultLong =(int)(-0.1373291015625);
private GeoPoint defaultGeoPint = new GeoPoint(defaultLat,defaultLong);
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rescue);
setCurrentLocation();
}
@Override
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
private void setCurrentLocation()
{
myMapView = (MapView)findViewById(R.id.rescueMapView);
myMapView.setTraffic(true);
///myMapView.setBuiltInZoomControls(true);
myMapController = myMapView.getController();
myMapController.setZoom(16); //Fixed Zoom Level
myLocationManager = (LocationManager)getSystemService(Context.LOCATION_SERVICE);
myLocationListener = new MyLocationListener();
try
{
Criteria criteria = new Criteria();
provider = myLocationManager.getBestProvider(criteria, false);
Location location = myLocationManager.getLastKnownLocation(provider);
myLocationManager.requestLocationUpdates(
provider,
0,
0,
myLocationListener);
Location lastLocation = myLocationManager.getLastKnownLocation(provider);
if(lastLocation != null)
{
int lastLocLat =(int)(lastLocation.getLatitude()*1000000);
int lastLocLong =(int)(lastLocation.getLongitude()*1000000);
//Get the current location in start-up
GeoPoint initGeoPoint = new GeoPoint(lastLocLat,lastLocLong);
CenterLocatio(initGeoPoint);
}
else
{
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("Location Services Disabled")
.setMessage("The location service on the device are disabled, your location is not able to be found, please call AXA uding the button below to be rescued")
.setCancelable(false)
.setPositiveButton("Drop pin", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
//do things
CenterLocatio(defaultGeoPint);
}
});
builder.create().show();
}
}
catch (Exception e)
{
// TODO: handle exception
Context context = getApplicationContext();
String toasttext = e.getMessage();
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, toasttext, duration);
toast.show();
}
}
private void CenterLocatio(GeoPoint centerGeoPoint)
{
myMapView.getOverlays().clear();
myMapController.animateTo(centerGeoPoint);
Drawable marker=getResources().getDrawable(R.drawable.marker);
marker.setBounds(0, 0, marker.getIntrinsicWidth(),
marker.getIntrinsicHeight());
int lat = centerGeoPoint.getLatitudeE6();
int lon = centerGeoPoint.getLongitudeE6();
double lat1 = centerGeoPoint.getLatitudeE6()/1E6;
double lon1 = centerGeoPoint.getLongitudeE6()/1E6;
ArrayList<Double> passing = new ArrayList<Double>();
passing.add(lat1);
passing.add(lon1);
Context context = getApplicationContext();
ReverseGeocodeLookupTask task = new ReverseGeocodeLookupTask();
task.applicationContext = context;
task.activityContext = rescue.this;
task.execute(passing);
myMapView.getOverlays().add(new SitesOverlay(marker,lat, lon));
me=new MyLocationOverlay(this, myMapView);
myMapView.getOverlays().add(me);
};
private class MyLocationListener implements LocationListener{
@Override
public void onLocationChanged(Location argLocation) {
// TODO Auto-generated method stub
GeoPoint myGeoPoint = new GeoPoint(
(int)(argLocation.getLatitude()*1000000),
(int)(argLocation.getLongitude()*1000000));
//CenterLocatio(myGeoPoint);
}
public void onProviderDisabled(String provider) {
// TODO Auto-generated method stub
}
public void onProviderEnabled(String provider) {
// TODO Auto-generated method stub
}
public void onStatusChanged(String provider,
int status, Bundle extras) {
// TODO Auto-generated method stub
}
}
private GeoPoint getPoint(int lat, int lon) {
return(new GeoPoint(lat, lon));
/*
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;
public SitesOverlay(Drawable marker, int lat, int longitude) {
super(marker);
this.marker=marker;
dragImage=(ImageView)findViewById(R.id.drag);
xDragImageOffset=dragImage.getDrawable().getIntrinsicWidth()/2;
yDragImageOffset=dragImage.getDrawable().getIntrinsicHeight();
items.add(new OverlayItem(getPoint(lat,
longitude),
"UN", "United Nations"));
/*
items.add(new OverlayItem(getPoint(40.76866299974387,
-73.98268461227417),
"Lincoln Center",
"Home of Jazz at Lincoln Center"));
*/
populate();
}
@Override
protected OverlayItem createItem(int i) {
return(items.get(i));
}
@Override
public void draw(Canvas canvas, MapView mapView,
boolean shadow) {
super.draw(canvas, mapView, shadow);
boundCenterBottom(marker);
}
@Override
public int size() {
return(items.size());
}
@Override
public boolean onTouchEvent(MotionEvent event, MapView mapView) {
final int action=event.getAction();
final int x=(int)event.getX();
final int y=(int)event.getY();
boolean result=false;
if (action==MotionEvent.ACTION_DOWN) {
for (OverlayItem item : items) {
Point p=new Point(0,0);
myMapView.getProjection().toPixels(item.getPoint(), p);
if (hitTest(item, marker, x-p.x, y-p.y)) {
result=true;
inDrag=item;
items.remove(inDrag);
populate();
xDragTouchOffset=0;
yDragTouchOffset=0;
setDragImagePosition(p.x, p.y);
dragImage.setVisibility(View.VISIBLE);
xDragTouchOffset=x-p.x;
yDragTouchOffset=y-p.y;
break;
}
}
}
else if (action==MotionEvent.ACTION_MOVE && inDrag!=null) {
setDragImagePosition(x, y);
result=true;
}
else if (action==MotionEvent.ACTION_UP && inDrag!=null) {
dragImage.setVisibility(View.GONE);
GeoPoint pt=myMapView.getProjection().fromPixels(x-xDragTouchOffset,
y-yDragTouchOffset);
String title = inDrag.getTitle();
OverlayItem toDrop=new OverlayItem(pt, title,
inDrag.getSnippet());
items.add(toDrop);
populate();
double lat = pt.getLatitudeE6()/1E6;
double lon = pt.getLongitudeE6()/1E6;
ArrayList<Double> passing = new ArrayList<Double>();
passing.add(lat);
passing.add(lon);
Context context = getApplicationContext();
ReverseGeocodeLookupTask task = new ReverseGeocodeLookupTask();
task.applicationContext = context;
task.activityContext = rescue.this;
task.execute(passing);
//CenterLocatio(pt);
inDrag=null;
result=true;
}
return(result || super.onTouchEvent(event, mapView));
}
private void setDragImagePosition(int x, int y) {
RelativeLayout.LayoutParams lp=
(RelativeLayout.LayoutParams)dragImage.getLayoutParams();
lp.setMargins(x-xDragImageOffset-xDragTouchOffset,
y-yDragImageOffset-yDragTouchOffset, 0, 0);
dragImage.setLayoutParams(lp);
}
}
public class ReverseGeocodeLookupTask extends AsyncTask <ArrayList<Double>, Void, String>
{
private ProgressDialog dialog;
protected Context applicationContext;
protected Context activityContext;
@Override
protected void onPreExecute()
{
this.dialog = ProgressDialog.show(activityContext, "Please wait",
"Requesting location", true);
}
protected String doInBackground(ArrayList<Double>... params)
{
String foundAddress = "";
String localityName = "";
ArrayList<Double> passed = params[0];
double lat = passed.get(0);
double lon = passed.get(1);
try
{
List<Address> addresses = new Geocoder(applicationContext,Locale.getDefault()).getFromLocation(lat,lon, 1);
if (addresses.size() > 0)
{
String addressLine = "";
for(Integer i = 0; i < addresses.get(0).getMaxAddressLineIndex(); i++)
{
if(!addressLine.equals(""))
{
addressLine+= ", ";
}
addressLine+= addresses.get(0).getAddressLine(i);
}
if(addressLine!="")
{
foundAddress+= addressLine;
}
}
}
catch (Exception e) {
}
finally
{
}
return foundAddress;
}
@Override
protected void onPostExecute(String result)
{
this.dialog.cancel();
showToast(result);
}
}
public void showToast(String message)
{
Context context = getApplicationContext();
String toasttext = message;
int duration = Toast.LENGTH_SHORT;
Toast toast = Toast.makeText(context, toasttext, duration);
toast.show();
}
}
感谢想法
这里是布局的xml
<?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"
android:orientation="vertical" android:id="@+id/rescue_rel_layout"
android:gravity="top" android:background="#fff">
<RelativeLayout android:layout_width="fill_parent"
android:layout_height="45dp" android:id="@+id/rescue_top_control_bar"
android:background="#FFFFFF" android:gravity="center_vertical">
<TextView android:id="@+id/rescueText"
android:layout_width="wrap_content"
android:layout_height="55dp"
android:text="Where are you ?"
android:gravity="center_vertical|center_horizontal"
android:textSize="20dp"
android:textStyle="bold"
android:textColor="#1D0073"
android:layout_weight="1.0"
android:layout_centerInParent="true"
/>
</RelativeLayout>
<LinearLayout android:id="@+id/LinearLayout01"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:layout_below="@id/rescue_top_control_bar"
android:orientation="vertical">
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff0000"
>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff0000"
android:layout_weight="1"
>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff0000"
android:layout_weight="1"
>
<com.google.android.maps.MapView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:foregroundGravity="top"
android:apiKey=""
android:clickable="true"
android:layout_weight="1"
android:id="@+id/rescueMapView"
/>
<ImageView android:id="@+id/drag"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/marker_up"
android:visibility="gone"
/>
</RelativeLayout>
<LinearLayout
android:id="@+id/loader"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#000"
android:layout_alignParentBottom="true"
android:visibility="invisible"
>
</LinearLayout>
</RelativeLayout>
</RelativeLayout>
</LinearLayout>
您是否收到任何错误？仅发布相关代码。 – GrIsHu
上面的代码是我正在使用的代码..没有任何其他错误..除地图本身之外的所有内容都显示 – regeme
类型安全：ArrayList的通用数组是为可变参数参数创建的。本地变量位置永远不会被读取。本地变量myGeoPoint永远不会被读取。局部变量localityName永远不会被读取..这些是我得到的一些警告.. –
regeme