android - 如何在android中移动谷歌地图缩放控制位置？

Question

我设法启动并运行了谷歌地图。问题是我正在开发的应用程序的当前设计与谷歌地图中的缩放控件重叠。如何将此缩放控件移动到另一个位置？

Answer 1

我找到了两种移动 GoogleMap 缩放控件的方法。第一个在@Numan1617 的回答中提到，使用 setPadding() 函数:

googleMap.setPadding(left, top, right, bottom);

当屏幕底部有 Google AdView 横幅时，这对于确保缩放控件可见非常有用。像这样:

googleMap.setPadding(0,0,0,adViewLayout.getHeight());

这会将左下角的 Google 名称、缩放控件和工具栏(当您触摸 map 上的标记时从右向左滑动)移动到包含您的 AdView 的布局上方。否则，这些 UI 控件可能完全或部分位于 AdView 之后。

但是如果您想要比这更好的控制怎么办？喜欢将缩放控件一直移动到角落吗？所以我深入研究并想出这种方法:获取包含缩放控件的 View 对象并为其设置新的 LayoutParams。

我还想移动指南针和工具栏，所以我在这里也包含了这些代码。

注意:GoogleMap UI 控件设置了文本标签，可以方便地访问它们。我包含了所有我能找到的 UI 控件文本标签。

在包含布局的缩放控件上似乎没有方便的标记，因此我必须获取其中一个放大/缩小控件，然后获取它的父 View (实际上是 ViewGroup)。我发现它包含RelativeLayout.LayoutParams，这意味着它的封闭布局是一个RelativeLayout。

在 DisplayMapFragment.java 中:

package <blah>;

import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RelativeLayout;

import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;

public class DisplayMapFragment implements OnMapReadyCallback {
    private static final String TAG = DisplayMapFragment.class.getSimpleName();

    private static final String GOOGLEMAP_COMPASS = "GoogleMapCompass";                   // [4]
    private static final String GOOGLEMAP_TOOLBAR = "GoogleMapToolbar";                   // [3]
    private static final String GOOGLEMAP_ZOOMIN_BUTTON = "GoogleMapZoomInButton";        // [2]child[0]
    private static final String GOOGLEMAP_ZOOMOUT_BUTTON = "GoogleMapZoomOutButton";      // [2]child[1]
    private static final String GOOGLEMAP_MYLOCATION_BUTTON = "GoogleMapMyLocationButton";// [0]

    private View mapView = null;

    public DisplayMapFragment() {
        // Required empty public constructor
    }

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

        Log.d(TAG, "onCreateView()");

        SupportMapFragment mapFragment = (SupportMapFragment) getChildFragmentManager().findFragmentById(R.id.map);

        mapFragment.setRetainInstance(true);

        mapFragment.getMapAsync(this);  // map calls my onMapReady()

        mapView = mapFragment.getView();

        return view;
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        Log.d(TAG, "onMapReady()");

        // move the compass to top center
        moveCompass(mapView,-1,4,-1,-1,true,false);

        // move toolbar to right center
        moveToolbar(mapView,-1,-1,4,-1,false,true);

        // move zoom controls to bottom right
        moveZoomControls(mapView, -1,-1,4,4,false,false);
    }

    /**
     * Move the View according to the passed params.  A -1 means to skip that one.
     *
     * NOTE:  this expects the view to be inside a RelativeLayout.
     *
     * @param view - a valid view
     * @param left - the distance from the left side
     * @param top - the distance from the top
     * @param right - the distance from the right side
     * @param bottom - the distance from the bottom
     * @param horizontal - boolean, center horizontally if true
     * @param vertical - boolean, center vertically if true
     */
    private void moveView(View view, int left, int top, int right, int bottom, boolean horizontal, boolean vertical) {
        try {
            assert view != null;

            // replace existing layout params
            RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.WRAP_CONTENT,
                    RelativeLayout.LayoutParams.WRAP_CONTENT);

            if (left >= 0) {
                rlp.addRule(RelativeLayout.ALIGN_PARENT_START, RelativeLayout.TRUE);
                rlp.addRule(RelativeLayout.ALIGN_PARENT_LEFT, RelativeLayout.TRUE);
            }

            if (top >= 0) {
                rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, RelativeLayout.TRUE);
            }

            if (right >= 0) {
                rlp.addRule(RelativeLayout.ALIGN_PARENT_END, RelativeLayout.TRUE);
                rlp.addRule(RelativeLayout.ALIGN_PARENT_RIGHT, RelativeLayout.TRUE);
            }

            if (bottom >= 0) {
                rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
            }

            if (horizontal) {
                rlp.addRule(RelativeLayout.CENTER_HORIZONTAL, RelativeLayout.TRUE);
            }

            if (vertical) {
                rlp.addRule(RelativeLayout.CENTER_VERTICAL, RelativeLayout.TRUE);
            }

            rlp.setMargins(left, top, right, bottom);

            view.setLayoutParams(rlp);
        } catch (Exception ex) {
            Log.e(TAG, "moveView() - failed: " + ex.getLocalizedMessage());
            ex.printStackTrace();
        }
    }

    private void moveCompass(View mapView, int left, int top, int right, int bottom, boolean horizontal, boolean vertical) {

        assert mapView != null;

        View compass = mapView.findViewWithTag(GOOGLEMAP_COMPASS);

        if (compass != null) {
            moveView(compass,left,top,right,bottom,horizontal,vertical);
        }
    }

    private void moveToolbar(View mapView, int left, int top, int right, int bottom, boolean horizontal, boolean vertical) {

        assert mapView != null;

        View toolbar = mapView.findViewWithTag(GOOGLEMAP_TOOLBAR);

        if (toolbar != null) {
            moveView(toolbar,left,top,right,bottom,horizontal,vertical);
        }
    }

    private void moveZoomControls(View mapView, int left, int top, int right, int bottom, boolean horizontal, boolean vertical) {

        assert mapView != null;

        View zoomIn = mapView.findViewWithTag(GOOGLEMAP_ZOOMIN_BUTTON);

        // we need the parent view of the zoomin/zoomout buttons - it didn't have a tag
        // so we must get the parent reference of one of the zoom buttons
        View zoomInOut = (View) zoomIn.getParent();

        if (zoomInOut != null) {
            moveView(zoomInOut,left,top,right,bottom,horizontal,vertical);
        }
    }
}