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私の場所を使用緯度経度とDB緯度経度計算距離。しかし、常にエラー "アプリケーションAndroidGoogleMaps（プロセスcom.androidhive.googlemaps）が予期せず停止しました。もう一度やり直してください。私の場所を使用緯度経度とDB緯度経度計算距離
public class AndroidGoogleMapsActivity extends MapActivity {
public int mm[][]= new int[100][100];
double[][] rtdist= new double[50][2];
double[][] okdist= new double[50][2];
public GeoPoint[] endpp = new GeoPoint[100];
private static String KEY_SUCCESS = "success";
private MyLocationOverlay mylayer;
private MapController mapController;
private MapView mapView;
protected GeoPoint geoPoint;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
findViews();
setupMap();
}
private void findViews() {
mapView = (MapView) findViewById(R.id.mapView);
mapController = mapView.getController();
mapView.setBuiltInZoomControls(true);
}
private void setupMap() {
List<Overlay> overlays = mapView.getOverlays();
mylayer = new MyLocationOverlay(this, mapView);
mylayer.runOnFirstFix(new Runnable() {
public void run() {
// Zoom in to current location
mapView.setTraffic(true);
mapController.setZoom(17);
mapController.animateTo(mylayer.getMyLocation());
}
});
overlays.add(mylayer);
GeoPoint startpp = mylayer.getMyLocation();
String b="SELECT lat,lng FROM markers";
UserFunctions userFunction = new UserFunctions();
JSONObject json = userFunction.execqlcmd(b);
try {
if (json.getString(KEY_SUCCESS) != null)
{
String res = json.getString(KEY_SUCCESS);
if(Integer.parseInt(res) == 1)
{
for(int i=0 ; i<100 ; i++) {
JSONObject json_row = json.getJSONObject("r"+i);
mm[i][0]=(int)(Double.parseDouble(json_row.getString("c0")) * 1E6) ;
mm[i][1]=(int)(Double.parseDouble(json_row.getString("c1")) * 1E6) ;
endpp[i] =new GeoPoint(mm[i][0], mm[i][1]);
MapController mc = mapView.getController();
DistanceCalculator caldist= new DistanceCalculator(6371);
for(int j = 0; j < 2; j++)
{
rtdist[j][0]=1;
rtdist[j][1]=caldist.CalculationByDistance(startpp, endpp[j]);
//startpp The location of the phone is
//endpp DB's lat lng
//To judge the results of this array is in line with the distance required by the user
if(rtdist[j][1]<=50)
{
okdist[j][0]=rtdist[j][0]; //The amount of store
okdist[j][0]=rtdist[j][1]; //Store the distance
}
}
mc.animateTo(geoPoint);
mc.setZoom(15);
mapView.invalidate();
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.mark_red);
AddItemizedOverlay itemizedOverlay =
new AddItemizedOverlay(drawable, this);
OverlayItem overlayitem = new OverlayItem(geoPoint, "Hello", "Sample Overlay item");
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
}}}}
catch (JSONException e) {
e.printStackTrace();
}
}
@Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
mylayer.enableMyLocation();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
mylayer.disableMyLocation();
}
@Override
protected boolean isRouteDisplayed() {
return false;
}
public class DistanceCalculator {
private double Radius;
// R = earth's radius (mean radius = 6,371km)
// Constructor
DistanceCalculator(double R) {
Radius = R;
}
public double CalculationByDistance(GeoPoint startpp, GeoPoint endpp) {
double lat1 = startpp.getLatitudeE6()/1E6;
double lat2 = endpp.getLatitudeE6()/1E6;
double lon1 = startpp.getLongitudeE6()/1E6;
double lon2 = endpp.getLongitudeE6()/1E6;
double dLat = Math.toRadians(lat2-lat1);
double dLon = Math.toRadians(lon2-lon1);
double a = Math.sin(dLat/2) * Math.sin(dLat/2) +
Math.cos(Math.toRadians(lat1)) * Math.cos(Math.toRadians(lat2)) *
Math.sin(dLon/2) * Math.sin(dLon/2);
double c = 2 * Math.asin(Math.sqrt(a));
return Radius * c;
}
}
}
LogCat：あなたは2つの地点間の距離を計算する場合
05-13 14:49:44.703: D/dalvikvm(303): GC_FOR_MALLOC freed 4358 objects/275032 bytes in 316ms
05-13 14:49:44.903: D/dalvikvm(303): GC_FOR_MALLOC freed 10567 objects/641664 bytes in 58ms
05-13 14:49:45.063: D/dalvikvm(303): GC_FOR_MALLOC freed 4727 objects/310440 bytes in 45ms
05-13 14:49:45.243: D/dalvikvm(303): GC_FOR_MALLOC freed 6480 objects/394584 bytes in 48ms
05-13 14:49:45.443: D/dalvikvm(303): GC_FOR_MALLOC freed 7949 objects/616640 bytes in 51ms
05-13 14:49:45.623: D/dalvikvm(303): GC_FOR_MALLOC freed 6072 objects/370040 bytes in 51ms
05-13 14:49:45.813: D/dalvikvm(303): GC_FOR_MALLOC freed 4449 objects/354128 bytes in 62ms
05-13 14:49:45.823: I/dalvikvm-heap(303): Grow heap (frag case) to 3.048MB for 87396-byte allocation
05-13 14:49:45.884: D/dalvikvm(303): GC_FOR_MALLOC freed 45 objects/2392 bytes in 66ms
05-13 14:49:45.953: D/dalvikvm(303): GC_FOR_MALLOC freed 2 objects/80 bytes in 67ms
05-13 14:49:45.953: I/dalvikvm-heap(303): Grow heap (frag case) to 3.129MB for 87396-byte allocation
05-13 14:49:46.013: D/dalvikvm(303): GC_FOR_MALLOC freed 0 objects/0 bytes in 58ms
05-13 14:49:46.273: E/JSON(303): {"tag":"exesqlcmd","success":1,"error":0,"rownum":2,"colnum":2,"r0":{"c0":"23.973728","c1":"121.583641"},"r1":{"c0":"23.973827","c1":"121.585625"}}
05-13 14:49:46.293: D/AndroidRuntime(303): Shutting down VM
05-13 14:49:46.293: W/dalvikvm(303): threadid=1: thread exiting with uncaught exception (group=0x4001d800)
05-13 14:49:46.313: E/AndroidRuntime(303): FATAL EXCEPTION: main
05-13 14:49:46.313: E/AndroidRuntime(303): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.androidhive.googlemaps/com.androidhive.googlemaps.AndroidGoogleMapsActivity}: java.lang.NullPointerException
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2663)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.os.Handler.dispatchMessage(Handler.java:99)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.os.Looper.loop(Looper.java:123)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.main(ActivityThread.java:4627)
05-13 14:49:46.313: E/AndroidRuntime(303): at java.lang.reflect.Method.invokeNative(Native Method)
05-13 14:49:46.313: E/AndroidRuntime(303): at java.lang.reflect.Method.invoke(Method.java:521)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-13 14:49:46.313: E/AndroidRuntime(303): at dalvik.system.NativeStart.main(Native Method)
05-13 14:49:46.313: E/AndroidRuntime(303): Caused by: java.lang.NullPointerException
05-13 14:49:46.313: E/AndroidRuntime(303): at com.androidhive.googlemaps.AndroidGoogleMapsActivity$DistanceCalculator.CalculationByDistance(AndroidGoogleMapsActivity.java:178)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.androidhive.googlemaps.AndroidGoogleMapsActivity.setupMap(AndroidGoogleMapsActivity.java:106)
05-13 14:49:46.313: E/AndroidRuntime(303): at com.androidhive.googlemaps.AndroidGoogleMapsActivity.onCreate(AndroidGoogleMapsActivity.java:41)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-13 14:49:46.313: E/AndroidRuntime(303): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2627)
05-13 14:49:46.313: E/AndroidRuntime(303): ... 11 more
calculationByDistanceは（、）それは私がこのhttp://www.codecodex.com/wiki/Calculate_distance_between_two_points_on_a_globe –
を資産計上している理由の方法で私はそれはそれはそれは私が変更小文字 – user1176220
参照だ –