Hi all, I have an MapView app downloaded from internet, when I tested
it on the simulator, everything is fine, but when I installed it on my
phone, the app stopped unexpectedly. Here is the code
public class CurrentLocationWithMap extends MapActivity {
MapView map;
MapController ctrlMap;
Button inBtn;
Button outBtn;
ToggleButton switchMap;
@Override
protected boolean isRouteDisplayed() {
return false;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
map = (MapView)findViewById(R.id.myMapView);
List<Overlay> overlays = map.getOverlays();
MyLocationOverlay myLocation = new
MyLocationOverlay(this,map);
myLocation.enableMyLocation();
overlays.add(myLocation);
ctrlMap = map.getController();
inBtn = (Button)findViewById(R.id.in);
outBtn = (Button)findViewById(R.id.out);
switchMap = (ToggleButton)findViewById(R.id.switchMap);
OnClickListener listener = new OnClickListener() {
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.in:
ctrlMap.zoomIn();
break;
case R.id.out:
ctrlMap.zoomOut();
break;
default:
break;
}
}
};
inBtn.setOnClickListener(listener);
outBtn.setOnClickListener(listener);
//=======================================
switchMap.setOnCheckedChangeListener(new
OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton cBtn, boolean
isChecked) {
if (isChecked == true) {
map.setSatellite(true);
} else {
map.setSatellite(false);
}
}
});
LocationManager locationManager;
String context = Context.LOCATION_SERVICE;
locationManager = (LocationManager)getSystemService(context);
//String provider = LocationManager.GPS_PROVIDER;
Criteria criteria = new Criteria();
criteria.setAccuracy(Criteria.ACCURACY_FINE);
criteria.setAltitudeRequired(false);
criteria.setBearingRequired(false);
criteria.setCostAllowed(true);
criteria.setPowerRequirement(Criteria.POWER_LOW);
String provider = locationManager.getBestProvider(criteria,
true);
Location location =
locationManager.getLastKnownLocation(provider);
updateWithNewLocation(location);
locationManager.requestLocationUpdates(provider, 2000, 10,
locationListener);
}
private final LocationListener locationListener = new
LocationListener() {
public void onLocationChanged(Location location) {
updateWithNewLocation(location);
}
public void onProviderDisabled(String provider){
updateWithNewLocation(null);
}
public void onProviderEnabled(String provider){ }
public void onStatusChanged(String provider, int status,
Bundle extras){ }
};
private void updateWithNewLocation(Location location) {
String latLongString;
TextView myLocationText;
myLocationText = (TextView)findViewById(R.id.myLocationText);
if (location != null) {
double lat = location.getLatitude();
double lng = location.getLongitude();
latLongString = "Latitude:" + lat + "\nLongtitude:" + lng;
ctrlMap.animateTo(new GeoPoint((int)(lat*1E6),(int)
(lng*1E6)));
} else {
latLongString = "Position not found";
}
myLocationText.setText("Current location:\n" +
latLongString);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/
android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:id="@+id/myLocationText"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<LinearLayout
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<Button
android:id="@+id/in"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Zoom in" />
<Button
android:id="@+id/out"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:text="Zoom out" />
</LinearLayout>
<ToggleButton
android:id="@+id/switchMap"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textOff="satelliteoff"
android:textOn="satellite on"/>
<com.google.android.maps.MapView
android:id="@+id/myMapView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:clickable="true"
android:apiKey="0sHYAwyCrlo-VN0Au3pKZnNg6XqNUc8xf1hyyEQ"
/>
</LinearLayout>
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