我开发的应用需要使用Google地图来显示城市周边的地方。因为谷歌地图V2适用于12级及以上的API，或者我告诉过，我使用了如下的SupportMapFramgment。
activity_map_view.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/rectangle" >
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentTop="true"
android:layout_above="@+id/button_layout"
android:layout_marginLeft="15dp"
android:layout_marginRight="15dp"
android:layout_marginTop = "7dp"
android:layout_marginBottom="7dp"
android:background="@drawable/background"
android:orientation="vertical"
android:paddingBottom="1dp"
android:paddingTop="1dp" >
<fragment
android:id="@+id/map_list"
android:name="com.google.android.gms.maps.SupportMapFragment"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
</fragment>
</LinearLayout>
<LinearLayout
android:id="@+id/button_layout"
android:layout_width="fill_parent"
android:layout_height="45dp"
android:layout_alignParentBottom="true"
android:layout_marginLeft="50dp"
android:layout_marginRight="50dp"
android:layout_marginTop= "7dp"
android:layout_marginBottom= "7dp"
android:orientation="horizontal"
android:weightSum="100" >
<ImageButton
android:id="@+id/btn_sugested"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_marginBottom="3dp"
android:layout_marginLeft="3dp"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:layout_marginRight="2dp"
android:layout_weight="50"
android:background="@android:color/transparent"
android:onClick="sugestedBussiness"
android:src="@drawable/te_sugjeruar_p" />
<ImageButton
android:id="@+id/btn_all"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:adjustViewBounds="true"
android:scaleType="fitCenter"
android:layout_marginBottom="3dp"
android:layout_marginLeft="2dp"
android:layout_marginRight="3dp"
android:layout_weight="50"
android:background="@android:color/transparent"
android:onClick="allBussiness"
android:src="@drawable/te_gjithe" />
</LinearLayout>
</RelativeLayout>
MapViewActivity.java
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_map_view);
............
if (android.os.Build.VERSION.SDK_INT > 14) {
getActionBar().setHomeButtonEnabled(true);
}
setMapFeatures();
}
.
.
.
.
.
private void initilizeMap() {
if (googleMap == null) {
googleMap = ((SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map_list)).getMap();
// check if map is created successfully or not
if (googleMap == null) {
Toast.makeText(getApplicationContext(),
"Sorry! unable to create maps", Toast.LENGTH_SHORT)
.show();
}
}
}
.
.
.
.
..
private void setMapFeatures() {
// Loading map
initilizeMap();
// Changing map type
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
// Showing / hiding your current location
googleMap.setMyLocationEnabled(true);
// Enable / Disable zooming controls
googleMap.getUiSettings().setZoomControlsEnabled(true);
// Enable / Disable my location button
googleMap.getUiSettings().setMyLocationButtonEnabled(true);
// Enable / Disable Compass icon
googleMap.getUiSettings().setCompassEnabled(true);
// Enable / Disable Rotate gesture
googleMap.getUiSettings().setRotateGesturesEnabled(true);
// Enable / Disable zooming functionality
googleMap.getUiSettings().setZoomGesturesEnabled(true);
GeoLocationH myGPS = new GeoLocationH(MapViewActivity.this);
if (myGPS.canGetLocation()) {
myGPS.getLocation();
myGPS.UpdateMyLocation();
sourcePosition = new LatLng(MyLocationH.getMyLatitude(),
MyLocationH.getMyLongitude());
}
CameraPosition cameraPosition = new CameraPosition.Builder()
.target(sourcePosition).zoom(Utils.CAMERA_ZOOMING).build();
googleMap.animateCamera(CameraUpdateFactory
.newCameraPosition(cameraPosition));
}
......
当我在8-10级的设备中运行应用程序时，它会给我下面的错误堆栈
05-29 13:24:57.547: W/GooglePlayServicesUtil(3792): Google Play services is missing.
05-29 13:24:57.555: W/GooglePlayServicesUtil(3792): Google Play services is missing.
05-29 13:24:57.571: W/GooglePlayServicesUtil(3792): Google Play services is missing.
05-29 13:24:57.571: W/GooglePlayServicesUtil(3792): Google Play services is missing.
05-29 13:24:57.579: W/GooglePlayServicesUtil(3792): Google Play services is missing.
05-29 13:24:57.610: W/GooglePlayServicesUtil(3792): Google Play services is missing.
05-29 13:24:57.618: D/AndroidRuntime(3792): Shutting down VM
05-29 13:24:57.618: W/dalvikvm(3792): threadid=1: thread exiting with uncaught exception (group=0x40018578)
05-29 13:24:57.618: E/AndroidRuntime(3792): FATAL EXCEPTION: main
05-29 13:24:57.618: E/AndroidRuntime(3792): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.dev.apk.myikubinfo/com.dev.apk.myikubinfo.MapViewActivity}: java.lang.NullPointerException
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.ActivityThread.access$1500(ActivityThread.java:117)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.os.Handler.dispatchMessage(Handler.java:99)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.os.Looper.loop(Looper.java:130)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.ActivityThread.main(ActivityThread.java:3687)
05-29 13:24:57.618: E/AndroidRuntime(3792): at java.lang.reflect.Method.invokeNative(Native Method)
05-29 13:24:57.618: E/AndroidRuntime(3792): at java.lang.reflect.Method.invoke(Method.java:507)
05-29 13:24:57.618: E/AndroidRuntime(3792): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
05-29 13:24:57.618: E/AndroidRuntime(3792): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
05-29 13:24:57.618: E/AndroidRuntime(3792): at dalvik.system.NativeStart.main(Native Method)
05-29 13:24:57.618: E/AndroidRuntime(3792): Caused by: java.lang.NullPointerException
05-29 13:24:57.618: E/AndroidRuntime(3792): at com.dev.apk.myikubinfo.MapViewActivity.setMapFeatures(MapViewActivity.java:290)
05-29 13:24:57.618: E/AndroidRuntime(3792): at com.dev.apk.myikubinfo.MapViewActivity.onCreate(MapViewActivity.java:114)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
05-29 13:24:57.618: E/AndroidRuntime(3792): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
05-29 13:24:57.618: E/AndroidRuntime(3792): ... 11 more
从错误堆栈中我得到的消息是错误是在这行代码中创建的：
// Changing map type
googleMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);
请有人帮我这个。
答案 0 :(得分：0)
W/GooglePlayServicesUtil(3792): Google Play services is missing.
您的测试环境没有Google Play服务，因此您无法使用Maps V2显示Google地图。请使用具有Google Play服务的设备再试一次。或者，follow the instructions to add code to detect this case并帮助用户安装Google Play服务（如果适用于他们的设备）。