如何通过双击在地图上添加标记并获取坐标[android]

Question

我想通过双击在谷歌地图上添加标记。我知道 googlemap.OnMapClickListener 但它在单击时添加了一个标记。我在谷歌地图中找到了一个关于处理双击的帖子，但我无法添加另一个类的标记。

MapFragment.java：

        @Override
        public View onCreateView(LayoutInflater inflater, final ViewGroup container,
                                 Bundle savedInstanceState) {
            // Inflate the layout for this fragment
            View view = inflater.inflate(R.layout.fragment_map, container, false);

            mMapView = (MapView) view.findViewById(R.id.mapView);
            mMapView.onCreate(savedInstanceState);

            mMapView.onResume(); // needed to get the map to display immediately

            try {
                MapsInitializer.initialize(getActivity().getApplicationContext());
            } catch (Exception e) {
                e.printStackTrace();
            }

            mMapView.getMapAsync(new OnMapReadyCallback() {
                @Override
                public void onMapReady(GoogleMap mMap) {
                    googleMap = mMap;

                    if (latitude != null && longitude != null) {
                        // For showing a move to my location button
                        if (ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(getActivity(), Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED)
                        {
                            return;
                        }
                        googleMap.setMyLocationEnabled(true);

                        // For dropping a marker at a point on the Map
                        final LatLng coordinates = new LatLng(latitude, longitude);

                        // For zooming automatically to the location of the marker
                        cameraPosition = new CameraPosition.Builder().target(coordinates).zoom(15).build();
                        googleMap.animateCamera(CameraUpdateFactory.newCameraPosition(cameraPosition));

                        googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
                            @Override
                            public void onMapClick(final LatLng coordinates){

                            **//adds marker on single tap & get coordinates**//

                            }
                        });

                    }

                }

            });

            return view;
        }

@Override
public boolean onDoubleTap(MotionEvent e) {

    return true; 
}

// Here will be some autogenerated methods too

地图片段.xml：

    <?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">

    <azizbekyan.andranik.map.OnDoubleTap
        android:id="@+id/mapView"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:enabled="true"
        android:clickable="true"
        android:apiKey="YOUR_API_KEY" />        
</LinearLayout>

OnDoubleTap.java：

    public class OnDoubleTap extends MapView {

  private long lastTouchTime = -1;

  public OnDoubleTap(Context context, AttributeSet attrs) {
    super(context, attrs);
  }

  @Override
  public boolean onInterceptTouchEvent(MotionEvent ev) {
    if (ev.getAction() == MotionEvent.ACTION_DOWN) {
      long thisTime = System.currentTimeMillis();
      if (thisTime - lastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {
        //** Double tap control here **//

        lastTouchTime = -1;
      } else {
        // Too slow 
        lastTouchTime = thisTime;
      }
    }
    return super.onInterceptTouchEvent(ev);
  }
}

现在如何通过双击在谷歌地图上添加标记并从另一个班级获取坐标？任何帮助将不胜感激。

Answer 1

尝试实现 rajan ks answer 并将这一行添加到您的“onMapReady”方法中

googleMap.getUiSettings().setZoomControlsEnabled(false);

这将禁用谷歌地图双击手势来放大地图

Answer 2

为此，您可以使用基于社区 wiki 的 this answer 的方法：您需要在自定义 TouchableWrapper 视图中拦截触摸并管理启用/禁用缩放手势：

public class TouchableWrapper extends FrameLayout {

    private GoogleMap mGoogleMap = null;
    private long mLastTouchTime = -1;

    public TouchableWrapper(Context context) {
        super(context);
    }

    public void setGoogleMap(GoogleMap googleMap) {
        mGoogleMap = googleMap;
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {

        switch (event.getAction() & MotionEvent.ACTION_MASK) {

            case MotionEvent.ACTION_DOWN:
                mGoogleMap.getUiSettings().setZoomGesturesEnabled(false);
                long thisTime = System.currentTimeMillis();
                if (thisTime - mLastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {

                    if (mGoogleMap != null) {
                        mGoogleMap.addMarker(new MarkerOptions()
                                .position(mGoogleMap.getProjection().fromScreenLocation(new Point((int)event.getX(), (int)event.getY())))
                                .title("DblTapped"));
                    }
                    mLastTouchTime = -1;
                } else {
                    mLastTouchTime = thisTime;
                    mGoogleMap.getUiSettings().setZoomGesturesEnabled(true);
                }
                break;
        }
        return super.dispatchTouchEvent(event);
    }
}

而不是创建自定义 MapFragment，它可以交换原始视图和可触摸视图：

public class MultiTouchMapFragment extends MapFragment {
    public View mOriginalContentView;
    public TouchableWrapper mTouchView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup parent, Bundle savedInstanceState) {
        mOriginalContentView = super.onCreateView(inflater, parent, savedInstanceState);
        mTouchView = new TouchableWrapper(getActivity());
        mTouchView.addView(mOriginalContentView);
        return mTouchView;
    }

    @Override
    public View getView() {
        return mOriginalContentView;
    }
}

并在MainActivity中使用它：

public class MainActivity extends AppCompatActivity implements OnMapReadyCallback {

    private GoogleMap mGoogleMap;
    private MultiTouchMapFragment mMapFragment;

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

        mMapFragment = (MultiTouchMapFragment) getFragmentManager()
                .findFragmentById(R.id.map_fragment);
        mMapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        mGoogleMap = googleMap;
        mMapFragment.mTouchView.setGoogleMap(mGoogleMap);
    }

}

activity_mail.xml 在哪里：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="<your_package_name>.MainActivity">

    <fragment
        android:id="@+id/map_fragment"
        android:name="<your_package_name>.MultiTouchMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>

</RelativeLayout>

这一切都成功了。

Answer 3

你可以使用googleMap.setonMapClickListener 来实现它

在片段内声明全局变量

private long lastTouchTime = -1;

将片段内的侦听器更新为

googleMap.setOnMapClickListener(new GoogleMap.OnMapClickListener() {
    @Override
    public void onMapClick(final LatLng coordinates){
        long thisTime = System.currentTimeMillis();
        if (thisTime - lastTouchTime < ViewConfiguration.getDoubleTapTimeout()) {
            //** Double tapped , write logic to add Map **//
            lastTouchTime = -1;
        } else {
            lastTouchTime = thisTime;
        }
    }
});