Problem inflating MapView

I'm going through the documentation at Hello, MapView to add a MapView to my Activity.

When I launch my Activity, I get an inflation error on the MapView.

Here is the MapView in my layout xml:

<com.google.android.maps.MapView
    android:id="@+id/mymap"
    android:layout_width="fill_parent"
    android:layout_height="200dip"
    android:clickable="true"
    android:apiKey="withheld"
    />

Here is the code in my MapActivity (the class is named ActivityDetails and extends MapActivity) class:

    MapView mMap;
    mMap = (MapView) findViewById(R.id.mymap);
    mMap.setBuiltInZoomControls(true);

Here is the error:

06-10 09:15:24.277: ERROR/AndroidRuntime(228): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.my.app/com.my.app.activity.ActivityDetails}: android.view.InflateException: Binary XML file line #35: Error inflating class com.google.android.maps.MapView
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.ActivityThread.access$2200(ActivityThread.java:119)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.os.Handler.dispatchMessage(Handler.java:99)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.os.Looper.loop(Looper.java:123)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.ActivityThread.main(ActivityThread.java:4363)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at java.lang.reflect.Method.invokeNative(Native Method)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at java.lang.reflect.Method.invoke(Method.java:521)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at dalvik.system.NativeStart.main(Native Method)
06-10 09:15:24.277: ERROR/AndroidRuntime(228): Caused by: android.view.InflateException: Binary XML file line #35: Error inflating class com.google.android.maps.MapView
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.createView(LayoutInflater.java:513)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:565)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:618)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.rInflate(LayoutInflater.java:621)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.inflate(LayoutInflater.java:407)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.inflate(LayoutInflater.java:320)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.inflate(LayoutInflater.java:276)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.android.internal.policy.impl.PhoneWindow.setContentView(PhoneWindow.java:198)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.Activity.setContentView(Activity.java:1622)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.my.app.activity.ActivityDetails.onCreate(ActivityDetails.java:128)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     ... 11 more
06-10 09:15:24.277: ERROR/AndroidRuntime(228): Caused by: java.lang.reflect.InvocationTargetException
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.google.android.maps.MapView.<init>(MapView.java:237)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at java.lang.reflect.Constructor.constructNative(Native Method)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at java.lang.reflect.Constructor.newInstance(Constructor.java:446)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at android.view.LayoutInflater.createView(LayoutInflater.java:500)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     ... 23 more
06-10 09:15:24.277: ERROR/AndroidRuntime(228): Caused by: java.lang.NullPointerException
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.google.android.maps.MapActivity.setupMapView(MapActivity.java:183)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.google.android.maps.MapView.<init>(MapView.java:279)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     at com.google.android.maps.MapView.<init>(MapView.java:254)
06-10 09:15:24.277: ERROR/AndroidRuntime(228):     ... 27 more

As far as I can tell, I've done everything correct as described in the documentation. I've 开发者_开发问答set my build target to Google APIs, I've added the uses-library tag to my Manifest, I'm running in an emulator with the Google API target...

The problem was I was calling super.onCreate() after setContentView() in the MapActivity.

You are using the wrong xml for your MapView

The class extending the MapActivity should call setContentView() with the xml containing stuff like this

<?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">
  <com.google.android.maps.MapView
    android:id="@+id/racemap"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:layout_x="0px"
    android:enabled="true"
    android:clickable="true"
    android:apiKey="blahblahblah" />
</LinearLayout>

So instead of using layout_details.xml use layout.xml

Insert this on your xml declaration of the MapView

xmlns:android="http://schemas.android.com/apk/res/android"