我想要做的是有一個地圖,包含ButtonField字段的點擊有兩個標準的開放,用戶必須指定位置,然後圖像必須被添加到該位置,否則該圖像必須被添加到用戶當前位置。錯誤的位置:的getLocation()方法不能從事件線程調用
我有是將兩個指標分析到如果問題在一個線程/新線程,甚至在FieldChangeListener聲明。
總是收到的錯誤是:
在錯誤的位置:javax.microedition.location.LocationException: 的getLocation()方法不能CAL [0.0]從事件線程[0.0]
導致在錯誤的位置:的getLocation()方法不能從事件 線程調用
我的代碼:
FieldChangeListener Listener = new FieldChangeListener() {
public void fieldChanged(Field field, int context) {
ButtonField buttonClicked = (ButtonField) field;
if ((buttonClicked.getLabel()).equals("Push")) {
CustomMapField mMapField;
Coordinates mCoordinates;
BlackBerryCriteria blackBerryCriteria = null;
BlackBerryLocation blackBerryLocation = null;
BlackBerryLocationProvider blackBerryLocationProvider = null;
double Doublelat = 0.0;
double Doublelng = 0.0;
blackBerryCriteria = new BlackBerryCriteria();
if(GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_CELLSITE)){
blackBerryCriteria.setMode(GPSInfo.GPS_MODE_CELLSITE);
}else if(GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_ASSIST)){
blackBerryCriteria.setMode(GPSInfo.GPS_MODE_ASSIST);
}else if(GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_AUTONOMOUS)){
blackBerryCriteria.setMode(GPSInfo.GPS_MODE_AUTONOMOUS);
}else{
blackBerryCriteria.setCostAllowed(true);
blackBerryCriteria.setPreferredPowerConsumption(Criteria.POWER_USAGE_LOW);
} try {
blackBerryLocationProvider = (BlackBerryLocationProvider) BlackBerryLocationProvider.getInstance(blackBerryCriteria);
blackBerryLocation = (BlackBerryLocation) blackBerryLocationProvider.getLocation(60);
QualifiedCoordinates qualifiedCoordinates = blackBerryLocation.getQualifiedCoordinates();
Doublelat = qualifiedCoordinates.getLatitude();
Doublelng = qualifiedCoordinates.getLongitude();
mCoordinates = new Coordinates(Doublelat, Doublelng, 0);
mMapField = new CustomMapField();
mMapField.mIcon = Bitmap.getBitmapResource("coin_silver.png");
mMapField.moveTo(mCoordinates);
mMapField.setZoom(1);
add(mMapField);
}catch(Exception e){
System.out.println("Debug 5");
System.out.println("Error in location :"+e.toString());
System.out.println("Error in location :"+e.getMessage());
}
}
}
};
public class CustomMapField extends MapField {
Bitmap mIcon;
XYRect mDest;
public void moveTo(Coordinates coordinates) {
super.moveTo(coordinates);
mDest = null;
}
protected void paint(Graphics graphics) {
super.paint(graphics);
if (null != mIcon) {
if (null == mDest) {
XYPoint fieldOut = new XYPoint();
convertWorldToField(getCoordinates(), fieldOut);
int imgW = mIcon.getWidth();
int imgH = mIcon.getHeight();
mDest = new XYRect(fieldOut.x - imgW/2,
fieldOut.y - imgH, imgW, imgH);
}
graphics.drawBitmap(mDest, mIcon, 0, 0);
}
}
}
錯誤與下面的行add(mMapField);
Doublelat = qualifiedCoordinates.getLatitude();
Doublelng = qualifiedCoordinates.getLongitude();
mCoordinates = new Coordinates(Doublelat, Doublelng, 0);
mMapField = new CustomMapField();
mMapField.mIcon=Bitmap.getBitmapResource("coin_silver.png");
mMapField.moveTo(mCoordinates);
mMapField.setZoom(1);
add(mMapField);
/*MapView mapView = new MapView();
mapView.setLatitude(finalintlat);
mapView.setLongitude(finalintlng);
mapView.setZoom(10);
MapsArguments mapsArgs = new MapsArguments(mapView);
Invoke.invokeApplication(Invoke.APP_TYPE_MAPS, mapsArgs);
請詳細告訴我具體怎麼做,請舉一個例子,我不能understan如何爲「mMapField」是一個自定義的MapField可及「MapView類」是一類MapView的(請參見上面我的代碼片段)
請幫助急用!
謝謝
只要讓我知道,你的應用程序沒有獲取位置時響應..? –