i'm trying to code an app that displays the current device position on a map. When i try to install it onto the device it says it cant find the class that is my main activity. it also says that dalvikvm can't resolve it the class' superclass, which is clearly MapActivity. Any ideas? thanks.
import java.util.List;
import com.google.android.maps.GeoPoint;
import com.google.android.maps.MapActivity;
import com.google.android.maps.MapController;
import com.google.android.maps.MapView;
import com.google.android.maps.Overlay;
import android.app.Activity;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Point;
import android.graphics.drawable.Drawable;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ZoomControls;
public class WcFinderActivity extends MapActivity implements LocationListener {
/** Called when the activity is first created. */
EditText txted = null;
Button btnSimple = null;
MapView gMapView = null;
MapController mc = null;
Drawable defaultMarker = null;
GeoPoint p = null;
double latitude = 18.9599990845, longitude = 72.819999694;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Creating TextBox displying Lat, Long
txted = (EditText) findViewById(R.id.id1);
String currentLocation = "Lat: " + latitude + " Lng: " + longitude;
txted.setText(currentLocation);
// Creating and initializing Map
gMapView = (MapView) findViewById(R.id.myGMap);
p = new GeoPoint((int) (latitude * 1000000), (int) (longitude * 1000000));
gMapView.setSatellite(true);
mc = gMapView.getController();
mc.setCenter(p);
mc.setZoom(14);
// Add a location mark
MyLocationOverlay myLocationOverlay = new MyLocationOverlay();
List<Overlay> list = gMapView.getOverlays();
list.add(myLocationOverlay);
// Adding zoom controls to Map
ZoomControls zoomControls = (ZoomControls) gMapView.getZoomControls();
zoomControls.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT));
gMapView.addView(zoomControls);
gMapView.displayZoomControls(true);
// Getting locationManager and reflecting changes over map if distance travel by
// user is greater than 500m from current location.
LocationManager lm = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000L, 500.0f, this);
}
/* This method is called when use position will get changed */
public void onLocationChanged(Location location) {
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
String currentLocation = "Lat: " + lat + " Lng: " + lng;
txted.setText(currentLocation);
p = new GeoPoint((int) lat * 1000000, (int) lng * 1000000);
mc.animateTo(p);
}
}
public void onProviderDisabled(String provider) {
// required for interface, not used
}
public void onProviderEnabled(String provider) {
// required for interface, not used
}
public void onStatusChanged(String provider, int status, Bundle extras) {
// required for interface, not used
}
protected boolean isRouteDisplayed() {
// TODO Auto-generated method stub
return false;
}
/* User can zoom in/out using keys provided on keypad */
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_I) {
gMapView.getController().setZoom(gMapView.getZoomLevel() + 1);
return true;
} else if (keyCode == KeyEvent.KEYCODE_O) {
gMapView.getController().setZoom(gMapView.getZoomLevel() - 1);
return true;
} else if (keyCode == KeyEvent.KEYCODE_S) {
gMapView.setSatellite(true);
return true;
} else if (keyCode == KeyEvent.KEYCODE_T) {
gMapView.setTraffic(true);
return true;
}
return false;
}
/* Class overload draw method which actually plot a marker,text etc. on Map */
protected class MyLocationOverlay extends com.google.android.maps.Overlay {
@Override
public boolean draw(Canvas canvas, MapView mapView, boolean shadow, long when) {
Paint paint = new Paint();
super.draw(canvas, mapView, shadow);
// Converts lat/lng-Point to OUR coordinates on the screen.
Point myScreenCoords = new Point();
mapView.getProjection().toPixels(p, myScreenCoords);
paint.setStrokeWidth(1);
paint.setARGB(255, 255, 255, 255);
paint.setStyle(Paint.Style.STROKE);
Bitmap bmp = BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher);
canvas.drawBitmap(bmp, myScreenCoords.x, myScreenCoords.y, paint);
canvas.drawText("I am here...", myScreenCoords.x, myScreenCoords.y, paint);
return true;
}
}
}
01-18 15:04:07.223: W/dalvikvm(3554): Unable to resolve superclass of Lcom/tecmark/WcFinderActivity; (23) 01-18 15:04:07.238: W/dalvikvm(3554): Link of class 'Lcom/tecmark/WcFinderActivity;' failed 01-18 15:04:07.238: D/AndroidRuntime(3554): Shutting down VM 01-18 15:04:07.238: W/dalvikvm(3554): threadid=3: thread exiting with uncaught exception (group=0x4001b180) 01-18 15:04:07.238: E/AndroidRuntime(3554): Uncaught handler: thread main exiting due to uncaught exception 01-18 15:04:07.278: E/AndroidRuntime(3554): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.tecmark/com.tecmark.WcFinderActivity}: java.lang.ClassNotFoundException: com.tecmark.WcFinderActivity in loader dalvik.system.PathClassLoader@43e57a18 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2417) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.ActivityThread.access$2200(ActivityThread.java:119) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.os.Handler.dispatchMessage(Handler.java:99) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.os.Looper.loop(Looper.java:123) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.ActivityThread.main(ActivityThread.java:4363) 01-18 15:04:07.278: E/AndroidRuntime(3554): at java.lang.reflect.Method.invokeNative(Native Method) 01-18 15:04:07.278: E/AndroidRuntime(3554): at java.lang.reflect.Method.invoke(Method.java:521) 01-18 15:04:07.278: E/AndroidRuntime(3554): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 01-18 15:04:07.278: E/AndroidRuntime(3554): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 01-18 15:04:07.278: E/AndroidRuntime(3554): at dalvik.system.NativeStart.main(Native Method) 01-18 15:04:07.278: E/AndroidRuntime(3554): Caused by: java.lang.ClassNotFoundException: com.tecmark.WcFinderActivity in loader dalvik.system.PathClassLoader@43e57a18 01-18 15:04:07.278: E/AndroidRuntime(3554): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243) 01-18 15:04:07.278: E/AndroidRuntime(3554): at java.lang.ClassLoader.loadClass(ClassLoader.java:573) 01-18 15:04:07.278: E/AndroidRuntime(3554): at java.lang.ClassLoader.loadClass(ClassLoader.java:532) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.Instrumentation.newActivity(Instrumentation.java:1021) 01-18 15:04:07.278: E/AndroidRuntime(3554): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2409) 01-18 15:04:07.278: E/AndroidRuntime(3554): ... 11 more
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<?xml version="1.0" ?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.tecmark"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="7" />
<uses-permission android:name="android.permission.INTERNET"></uses-permission>
<uses-library android:name="com.google.android.maps" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"></uses-permission>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"></uses-permission>
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:name=".WcFinderActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
