"IBitmapDescriptorFactory未初始化"错误

Question

我正在尝试在Google Maps Android API v2中使用自定义图标获取标记.我刚刚更改了Google提供的一个示例.我.icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow))在方法中添加了RawMapViewDemoActivitysetUpMap().

private void setUpMapIfNeeded() {
    if (mMap == null) {
        mMap = ((MapView) findViewById(R.id.map)).getMap();
        if (mMap != null) {
            setUpMap();
        }
    }
}

private void setUpMap() {
    mMap.addMarker(new MarkerOptions()
        .position(new LatLng(0, 0))
        .title("Marker")
        .icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow)));
}

但我总是得到"IBitmapDescriptorFactory未初始化".

12-18 15:40:54.356: E/AndroidRuntime(12591): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mapdemo/com.example.mapdemo.RawMapViewDemoActivity}: java.lang.NullPointerException: IBitmapDescriptorFactory is not initialized
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.ActivityThread.access$600(ActivityThread.java:130)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.os.Handler.dispatchMessage(Handler.java:99)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.os.Looper.loop(Looper.java:137)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.ActivityThread.main(ActivityThread.java:4745)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at java.lang.reflect.Method.invokeNative(Native Method)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at java.lang.reflect.Method.invoke(Method.java:511)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at dalvik.system.NativeStart.main(Native Method)
12-18 15:40:54.356: E/AndroidRuntime(12591): Caused by: java.lang.NullPointerException: IBitmapDescriptorFactory is not initialized
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.google.android.gms.internal.at.a(Unknown Source)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.google.android.gms.maps.model.BitmapDescriptorFactory.d(Unknown Source)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.google.android.gms.maps.model.BitmapDescriptorFactory.fromResource(Unknown Source)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.example.mapdemo.RawMapViewDemoActivity.setUpMap(RawMapViewDemoActivity.java:67)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.example.mapdemo.RawMapViewDemoActivity.setUpMapIfNeeded(RawMapViewDemoActivity.java:58)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at com.example.mapdemo.RawMapViewDemoActivity.onCreate(RawMapViewDemoActivity.java:43)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.Activity.performCreate(Activity.java:5008)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1079)
12-18 15:40:54.356: E/AndroidRuntime(12591):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2023)
12-18 15:40:54.356: E/AndroidRuntime(12591):    ... 11 more

在BitmapDescriptorFactory中它说:

在使用此类中的任何方法之前,必须执行以下操作之一以确保初始化此类:

• 等待GoogleMap从您添加到应用程序的MapFragment或MapView中可用.您可以通过调用getMap()方法并检查返回的对象是否为null来验证GoogleMap是否可用.

• 调用MapsInitializer.initialize(Context).只要不抛出com.google.android.gms.common.GooglePlayServicesNotAvailableException GooglePlayServicesNotAvailableException,就会正确初始化此类.

我做了第一个,但仍然得到这个错误.有什么建议？

Answer 1

打电话MapsInitializer.initialize(getApplicationContext())给onCreate()

Answer 2

请致电以下 onCreate()

try {
        MapsInitializer.initialize(getApplicationContext());
    } catch (GooglePlayServicesNotAvailableException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

Answer 3

移动您的代码称为'onMapReady()',这是GoogleMaps API提供的回调.

它会工作!