opening another activity from the map overlay dialogs

I am trying to create a map application and I need to do something similar to what Google Maps does. I want to open show a list of locations and when user taps on them I want to show a dialog.

I was able to do it till here. But now when the user clicks on the dialog that opened I want to show another acttivity with the details of that item that they clicked on.

I tried to start a new intent but it gives me an error.

Here is what I am doing

private void drawPopupWindow(Canvas canvas,int index, MapView mapView, boolean shadow) {

        OverlayItem item = mOverlays.get(index);
        GeoPoint geoPoint = item.getPoint();

        LayoutInflater inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        LinearLayout dialogLayout = (LinearLayout)inflater.inflate(R.layout.location_dialog, null);
        LayoutParams mapDialogParams = new LayoutParams(
                ViewGroup.LayoutParams.WRAP_CONTENT, 
                ViewGroup.LayoutParams.WRAP_CONTENT, 
                geoPoint, -1, -22, 
                LayoutParams.BOTTOM_CENTER);
        mapView.addView(dialogLayout, mapDialogParams);

        dialogLayout.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                Intent detailIntent = new Intent(mContext, ItemDetailView.class);
                mContext.startActivity(detailIntent); // I passed the context from mapActivity
            }
        });     

    }

Here is the stack trace

> E/AndroidRuntime( 4985):
> java.lang.RuntimeException: Unable to
> start activity
> ComponentInfo{com.achie.test.mapssample/com.achie.test.mapssample.ItemDetailView}:
> android.view.InflateException: Binary
> XML file line #2: Error inflating
> class <unknown> E/AndroidRuntime(
> 4985):    at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.access$2200(ActivityThread.java:119)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
> E/AndroidRuntime( 4985):  at
> android.os.Handler.dispatchMessage(Handler.java:99)
> E/AndroidRuntime( 4985):  at
> android.os.Looper.loop(Looper.java:123)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.main(ActivityThread.java:4363)
> E/AndroidRuntime( 4985):  at
> java.lang.reflect.Method.invokeNative(Native
> Method) E/AndroidRuntime( 4985):  at
> java.lang.reflect.Method.invoke(Method.java:521)
> E/AndroidRuntime( 4985):  at
> com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
> E/AndroidRuntime( 4985):  at
> com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
> E/AndroidRuntime( 4985):  at
> dalvik.system.NativeStart.main(Native
> Method) E/AndroidRuntime( 4985):
> Caused by:
> android.view.InflateException: Binary
> XML file line #2: Error inflating
> class <unknown> E/AndroidRuntime(
> 4985):    at
> android.view.LayoutInflater.createView(LayoutInflater.java:513)
> E/Android开发者_Python百科Runtime( 4985):  at
> android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.inflate(LayoutInflater.java:385)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.inflate(LayoutInflater.java:320)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.inflate(LayoutInflater.java:276)
> E/AndroidRuntime( 4985):  at
> com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
> E/AndroidRuntime( 4985):  at
> android.app.Activity.setContentView(Activity.java:1622)
> E/AndroidRuntime( 4985):  at
> com.achie.test.mapssample.ItemDetailView.onCreate(ItemDetailView.java:11)
> E/AndroidRuntime( 4985):  at
> android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
> E/AndroidRuntime( 4985):  at
> android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
> E/AndroidRuntime( 4985):  ... 11 more
> E/AndroidRuntime( 4985): Caused by:
> java.lang.reflect.InvocationTargetException
> E/AndroidRuntime( 4985):  at
> com.google.android.maps.MapView.<init>(MapView.java:238)
> E/AndroidRuntime( 4985):  at
> java.lang.reflect.Constructor.constructNative(Native
> Method) E/AndroidRuntime( 4985):  at
> java.lang.reflect.Constructor.newInstance(Constructor.java:446)
> E/AndroidRuntime( 4985):  at
> android.view.LayoutInflater.createView(LayoutInflater.java:500)
> E/AndroidRuntime( 4985):  ... 20 more
> E/AndroidRuntime( 4985): Caused by:
> java.lang.IllegalArgumentException:
> MapViews can only be created inside
> instances of MapActivity.
> E/AndroidRuntime( 4985):  at
> com.google.android.maps.MapView.<init>(MapView.java:282)
> E/AndroidRuntime( 4985):  at
> com.google.android.maps.MapView.<init>(MapView.java:255)
> E/AndroidRuntime( 4985):  ... 24 more

Why am I getting this error and how can I resolve this and open a new activity?

Also where can I find the source code for the google maps on android?

Thank you.

As the stack trace tells you, "MapViews can only be created inside instances of MapActivity." You are attempting to create a MapView outside of a MapActivity. Change your code to avoid doing this, and you will clear up this error.