java显示3D地形地图盒v10 Android
我正在尝试使用安卓 v10的新地图盒,特别是新的3d地形功能。所有的例子都在Kotlin中,我遵循了下面的在线指南,但我一直遇到相同的错误消息
在线示例:
mapboxMap.loadStyle(
styleExtension = style(Style.SATELLITE_STREETS) {
+rasterDemSource("TERRAIN_SOURCE") {
url("mapbox://mapbox.mapbox-terrain-dem-v1")
}
+terrain("TERRAIN_SOURCE") {
exaggeration(1.1)
}
)
以下是我正在使用的代码:
public class MainActivity extends AppCompatActivity {
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mapView = findViewById(R.id.mapView);
//mapView.getMapboxMap().loadStyleUri(Style.OUTDOORS);
MapboxMap mapboxMap = mapView.getMapboxMap();
StyleContract.StyleExtension styleExtension = new StyleContract.StyleExtension() {
@NonNull
@Override
public String getStyleUri() {
return Style.SATELLITE;
}
@NonNull
@Override
public List<StyleContract.StyleSourceExtension> getSources() {
RasterDemSource rasterDemSource = new RasterDemSource(new RasterDemSource.Builder("TERRAIN_SOURCE"));
rasterDemSource.url("mapbox://mapbox.mapbox-terrain-v2");
List<StyleContract.StyleSourceExtension> ex = new ArrayList<StyleContract.StyleSourceExtension>();
ex.add(rasterDemSource);
return ex;
}
@NonNull
@Override
public List<StyleContract.StyleImageExtension> getImages() {
return null;
}
@NonNull
@Override
public List<Pair<StyleContract.StyleLayerExtension, LayerPosition>> getLayers() {
return null;
}
@Nullable
@Override
public StyleContract.StyleLightExtension getLight() {
return null;
}
@Nullable
@Override
public StyleContract.StyleTerrainExtension getTerrain() {
Terrain terrain = new Terrain("TERRAIN_SOURCE");
terrain.exaggeration(1.1);
return null;
}
};
mapboxMap.loadStyle(styleExtension);
}
}
我一直收到以下错误代码:
2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err: java.lang.NullPointerException: Attempt to invoke interface method 'java.util.Iterator java.lang.Iterable.iterator()' on a null object reference 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err: at com.mapbox.maps.MapboxMap.onFinishLoadingStyleExtension$sdk_release(MapboxMap.kt:1349) 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err: at com.mapbox.maps.MapboxMap$loadStyle$1.onStyleLoaded(MapboxMap.kt:163) 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err: at com.mapbox.maps.MapboxMap$initializeStyleLoad$1.onStyleLoaded(MapboxMap.kt:214) 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err: at com.mapbox.maps.StyleObserver.onStyleLoaded(StyleObserver.kt:58) 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err: at com.mapbox.maps.NativeObserver.notify(NativeObserver.kt:61) 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err:
at 安卓.os.MessageQueue.nativePollOnce(Native Method) 2021-11-02 17:21:39.439 23646-23646/com.example.myapplication W/System.err:
at 安卓.os.MessageQueue.next(MessageQueue.java:335) 2021-11-02 17:21:39.440 23646-23646/com.example.myapplication W/System.err:
at 安卓.os.Looper.loop(Looper.java:206) 2021-11-02 17:21:39.440 23646-23646/com.example.myapplication W/System.err: at 安卓.app.ActivityThread.main(ActivityThread.java:8633) 2021-11-02 17:21:39.440 23646-23646/com.example.myapplication W/System.err:
at java.lang.reflect.Method.invoke(Native Method) 2021-11-02 17:21:39.440 23646-23646/com.example.myapplication W/System.err:
at com.安卓.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602) 2021-11-02 17:21:39.440 23646-23646/com.example.myapplication W/System.err: at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:1130) 2021-11-02 17:21:39.446 23646-23646/com.example.myapplication E/libc++abi: terminating with uncaught exception of type jni::PendingJavaException 2021-11-02 17:21:39.447 23646-23646/com.example.myapplication A/libc: Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 23646 (e.myapplication), pid 23646 (e.myapplication)
# 1 楼答案
事实证明,我使用的样式扩展不正确,以下内容现在可以使用了:
# 2 楼答案
与其这样,不如尝试使用
希望它对我有帮助,因为它对我来说完美无瑕