Android 如何从谷歌地图标记获取视图？

我想将showcaseview添加到android地图上的标记中！？ showcase库将视图作为参数。 如何从标记获取视图

我正在尝试这个代码

new GuideView.Builder(this)
    .setTitle("Guide Title Text")
    .setContentText("Guide Description Text\n .....Guide Description Text\n .....Guide Description Text .....")
    .setGravity(Gravity.auto) //optional
    .setDismissType(DismissType.anywhere) //optional - default DismissType.targetView
    .setTargetView(view)
    .setContentTextSize(12)//optional
    .setTitleTextSize(14)//optional
    .build()
    .show();

它将视图作为setTargetView中的参数，而不是标记对象

这是我想用的图书馆

---

标记

不是视图，您无法从中获取

视图

。但无论如何，您可以创建虚拟透明

视图

，并以编程方式将其放置在所选标记上，然后通过

setTargetView

方法将其传递到ShowCaseView库。因此，您需要在

MapFragment

或

MapView

周围使用根视图，例如

RelativeLayout

（

activity\u main.xml

）：

然后，在例如

MainActivity

中，您需要获取根布局和充气虚拟透明视图，当选择标记时（例如单击），您应该获取所选

标记的当前屏幕坐标，并将虚拟透明视图正好放在其上方。对于
RelativeLayout
可以通过
setLeft（）
对于
x
-坐标和
setTop（）
对于
y
-坐标（当然，您需要根据
标记调整偏移量）。诸如此类：

public class MainActivity extends AppCompatActivity {

    private static final String MAP_VIEW_BUNDLE_KEY = "MapViewBundleKey";
    static final LatLng KYIV = new LatLng(50.450311, 30.523730);

    private GoogleMap mGoogleMap;
    private RelativeLayout mMapViewRoot;
    private MapView mGoogleMapView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Bundle mapViewBundle = null;
        if (savedInstanceState != null) {
            mapViewBundle = savedInstanceState.getBundle(MAP_VIEW_BUNDLE_KEY);
        }

        mMapViewRoot = (RelativeLayout) findViewById(R.id.mapview_root);
        // dummy transparent view
        final View transparentView = View.inflate(getApplicationContext(), R.layout.transparent_view, mMapViewRoot);

        mGoogleMapView = (MapView) findViewById(R.id.mapview);
        mGoogleMapView.onCreate(mapViewBundle);
        mGoogleMapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap googleMap) {
                mGoogleMap = googleMap;
                mGoogleMap.addMarker(new MarkerOptions().position(KYIV).title("Kyiv"));
                mGoogleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
                    @Override
                    public boolean onMarkerClick(Marker marker) {
                        // get screen coordinates of the marker
                        Projection projection = mGoogleMap.getProjection();
                        Point viewPosition = projection.toScreenLocation(marker.getPosition());

                        // place dummy transparent view over the marker
                        transparentView.setLeft(viewPosition.x);
                        transparentView.setTop(viewPosition.y);
                        return false;
                    }
                });

                mGoogleMap.animateCamera(CameraUpdateFactory.newLatLng(KYIV));

                ...

            }
        });

    }
...

当然，这只是想法的一个例子，您应该改进标记大小、锚定等代码

<?xml version="1.0" encoding="utf-8"?>
<View
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="20dp"  <- adjust size programmatically or set to default size of Marker
    android:layout_height="30dp"
    android:layout_centerInParent="true"
    android:background="@android:color/transparent">
</View>

public class MainActivity extends AppCompatActivity {

    private static final String MAP_VIEW_BUNDLE_KEY = "MapViewBundleKey";
    static final LatLng KYIV = new LatLng(50.450311, 30.523730);

    private GoogleMap mGoogleMap;
    private RelativeLayout mMapViewRoot;
    private MapView mGoogleMapView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        Bundle mapViewBundle = null;
        if (savedInstanceState != null) {
            mapViewBundle = savedInstanceState.getBundle(MAP_VIEW_BUNDLE_KEY);
        }

        mMapViewRoot = (RelativeLayout) findViewById(R.id.mapview_root);
        // dummy transparent view
        final View transparentView = View.inflate(getApplicationContext(), R.layout.transparent_view, mMapViewRoot);

        mGoogleMapView = (MapView) findViewById(R.id.mapview);
        mGoogleMapView.onCreate(mapViewBundle);
        mGoogleMapView.getMapAsync(new OnMapReadyCallback() {
            @Override
            public void onMapReady(GoogleMap googleMap) {
                mGoogleMap = googleMap;
                mGoogleMap.addMarker(new MarkerOptions().position(KYIV).title("Kyiv"));
                mGoogleMap.setOnMarkerClickListener(new GoogleMap.OnMarkerClickListener() {
                    @Override
                    public boolean onMarkerClick(Marker marker) {
                        // get screen coordinates of the marker
                        Projection projection = mGoogleMap.getProjection();
                        Point viewPosition = projection.toScreenLocation(marker.getPosition());

                        // place dummy transparent view over the marker
                        transparentView.setLeft(viewPosition.x);
                        transparentView.setTop(viewPosition.y);
                        return false;
                    }
                });

                mGoogleMap.animateCamera(CameraUpdateFactory.newLatLng(KYIV));

                ...

            }
        });

    }
...