I've modified the code a bit since the last time, and now it crashes
at runtime.
I've got the log-cat and code below.
Any suggestions, or links to a tutoiral on how to go about debugging
would be appreciated.
Thanks,
Declan
package com.wissen.android;
import java.util.List;
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.hardware.SensorManager;
import android.location.Location;
import android.location.LocationListener;
import android.location.LocationManager;
import android.os.Bundle;
import android.os.Vibrator;
import android.util.Config;
import android.util.Log;
import android.view.KeyEvent;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.ZoomControls;
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;
public class Hello 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 = 0.0, longitude = 0.0;
// for current location
double desLat, desLong;// for current destination
private SensorManager mSensorManager;
private float[] mValues;
private static final String TAG = "Compass";
// for compasse
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// makes the field with text
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);
}
public void onSensorChanged(int sensor, float[] values) {
if (Config.LOGD) Log.d(TAG, "sensorChanged (" + values[0] + ",
" + values[1] + ", " + values[2] + ")");{
mValues = values;
//Doesn't work, should appear if this section is called,
never called?
String currentLocation = "Got magnetic
==================================";
txted.setText(currentLocation);
int i=90;
if (mValues != null) {
if(mValues[0]<i+3&mValues[0]>i-3)
{
Vibrator vibrator =
(Vibrator)getSystemService
(Context.VIBRATOR_SERVICE);
vibrator.vibrate((long) 300.0);
}
}
//Code needed to make a compasse vibrate, I should be
from baring
methad
Vibrator vibrator = (Vibrator)getSystemService
(Context.VIBRATOR_SERVICE);
vibrator.vibrate((long) 300.0);
}
}
/* 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);
Vibrator vibrator = (Vibrator)getSystemService
(Context.VIBRATOR_SERVICE);
vibrator.vibrate((long) 300.0);
}
}
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.marker);
canvas.drawBitmap(bmp, myScreenCoords.x,
myScreenCoords.y, paint);
canvas.drawText("I am here...", myScreenCoords.x,
myScreenCoords.y,
paint);
return true;
}
}
}
08-12 15:39:02.892: ERROR/AndroidRuntime(548): Uncaught handler:
thread main exiting due to uncaught exception
08-12 15:39:02.912: ERROR/AndroidRuntime(548):
java.lang.RuntimeException: Unable to start activity ComponentInfo
{com.example.North/com.example.North.North}:
java.lang.ClassCastException: com.example.North.North
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2268)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:
2284)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.ActivityThread.access$1800(ActivityThread.java:112)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.ActivityThread$H.handleMessage(ActivityThread.java:1692)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.os.Handler.dispatchMessage(Handler.java:99)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.os.Looper.loop(Looper.java:123)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.ActivityThread.main(ActivityThread.java:3948)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
java.lang.reflect.Method.invokeNative(Native Method)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
java.lang.reflect.Method.invoke(Method.java:521)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run
(ZygoteInit.java:782)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
com.android.internal.os.ZygoteInit.main(ZygoteInit.java:540)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
dalvik.system.NativeStart.main(Native Method)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): Caused by:
java.lang.ClassCastException: com.example.North.North
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
com.example.North.North.onCreate(North.java:61)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:
1123)
08-12 15:39:02.912: ERROR/AndroidRuntime(548): at
android.app.ActivityThread.performLaunchActivity(ActivityThread.java:
2231)
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