I'm getting an error in my Android application. The application worked perfectly and then when I was building the apk I realised my Google Maps API key wasn't going to work for multiple users, so I made a new one following the Google tutorial. Now when I install my app I get a force close - could someone help me ?
This is the logcat:
`03-20 15:42:45.209 3906-3906/project.sharethefare E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: project.sharethefare, PID: 3906
java.lang.RuntimeException: Unable to start activity ComponentInfo{project.sharethefare/project.sharethefare.CurrentLocation}: java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.maps.GoogleMap com.google.android.gms.maps.SupportMapFragment.getMap()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2658)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2725)
at android.app.ActivityThread.access$900(ActivityThread.java:172)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5834)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.google.android.gms.maps.GoogleMap com.google.android.gms.maps.SupportMapFragment.getMap()' on a null object reference
at project.sharethefare.CurrentLocation.setUpMapIfNeeded(CurrentLocation.java:55)
at project.sharethefare.CurrentLocation.onCreate(CurrentLocation.java:25)
at android.app.Activity.performCreate(Activity.java:6221)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2611)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2725)
at android.app.ActivityThread.access$900(ActivityThread.java:172)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1422)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:5834)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1388)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1183)
`
This is the class:
public class CurrentLocation extends FragmentActivity {
private GoogleMap mMap; // Might be null if Google Play services APK is not available.
//________________________________________________________________________________________
@Override
protected void onCreate(Bundle savedInstanceState) { //auto generated
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_current_location);
setUpMapIfNeeded(); //part of google maps api
mMap.setMyLocationEnabled(true); //creates a new HomeScreen
}
@Override
protected void onResume() { //Auto Generated
super.onResume();
setUpMapIfNeeded(); //set up map if not already created
}
/**
* Sets up the map if it is possible to do so (i.e., the Google Play services APK is correctly
* installed) and the map has not already been instantiated.. This will ensure that we only ever
* call {@link #setUpMap()} once when {@link #mMap} is not null.
* <p/>
* If it isn't installed {@link SupportMapFragment} (and
* {@link com.google.android.gms.maps.MapView MapView}) will show a prompt for the user to
* install/update the Google Play services APK on their device.
* <p/>
* A user can return to this FragmentActivity after following the prompt and correctly
* installing/updating/enabling the Google Play services. Since the FragmentActivity may not
* have been completely destroyed during this process (it is likely that it would only be
* stopped or paused), {@link #onCreate(Bundle)} may not be called again so we should call this
* method in {@link #onResume()} to guarantee that it will be called.
*/
private void setUpMapIfNeeded() {
// Do a null check to confirm that we have not already instantiated the map.
if (mMap == null) {
// Try to obtain the map from the SupportMapFragment.
mMap = ((SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.curLocMap))
.getMap();
// Check if we were successful in obtaining the map.
if (mMap != null) {
setUpMap();
}
}
}
/**
* This is where we can add markers or lines, add listeners or move the camera. In this case, we
* just add a marker near Africa.
* <p/>
* This should only be called once and when we are sure that {@link #mMap} is not null.
*/
//call the method to continuously check current location
private void setUpMap() {
mMap.setOnMyLocationChangeListener(myLocationChangeListener);
}
//called above. Used to constantly update the users position on the map
private GoogleMap.OnMyLocationChangeListener myLocationChangeListener = new GoogleMap.OnMyLocationChangeListener() {
@Override
public void onMyLocationChange(Location location) {
//create a new latitude and longitude point
LatLng loc = new LatLng(location.getLatitude(), location.getLongitude());
//make global variables on home screen == to current location
HomeScreen.curLat = location.getLatitude();
HomeScreen.curLong = location.getLongitude();
HomeScreen.curLocSet = true;
//animate the camera to zoom in on position when found
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(loc, 16.0f));
}
};
public void backToHome(View view){ // called when button clicked. returns to homeScreen activity
Intent intent = new Intent(CurrentLocation.this,HomeScreen.class);
startActivity(intent);
}
}
Any help would be greatly appreciated. Thanks in advance
