我有另一种方法来做同样的事情，效果很好。为了在屏幕上显示所有标记，我们需要一个中长和缩放级别。这里是一个函数，它会给你两个，需要所有标记的Latlng对象作为输入。

 public Pair<LatLng, Integer> getCenterWithZoomLevel(LatLng... l) {
    float max = 0;

    if (l == null || l.length == 0) {
        return null;
    }
    LatLngBounds.Builder b = new LatLngBounds.Builder();
    for (int count = 0; count < l.length; count++) {
        if (l[count] == null) {
            continue;
        }
        b.include(l[count]);
    }

    LatLng center = b.build().getCenter();

    float distance = 0;
    for (int count = 0; count < l.length; count++) {
        if (l[count] == null) {
            continue;
        }
        distance = distance(center, l[count]);
        if (distance > max) {
            max = distance;
        }
    }

    double scale = max / 1000;
    int zoom = ((int) (16 - Math.log(scale) / Math.log(2)));
    return new Pair<LatLng, Integer>(center, zoom);
}

这个函数返回Pair对象，你可以像这样使用它

getCenterWithZoomLevel(l1,l2,l3..); mGoogleMap.moveCamera (CameraUpdateFactory.newLatLngZoom(一对。首先,pair.second));

你可以不用填充来让标记远离屏幕边界，你可以通过-1来调整缩放。

这会有帮助的。从谷歌api演示

private List<Marker> markerList = new ArrayList<>();
Marker marker = mGoogleMap.addMarker(new MarkerOptions().position(geoLatLng)
                .title(title));
markerList.add(marker);
    // Pan to see all markers in view.
    // Cannot zoom to bounds until the map has a size.
    final View mapView = getSupportFragmentManager().findFragmentById(R.id.map).getView();
    if (mapView!=null) {
        if (mapView.getViewTreeObserver().isAlive()) {
            mapView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
                @SuppressWarnings("deprecation") // We use the new method when supported
                @SuppressLint("NewApi") // We check which build version we are using.
                @Override
                public void onGlobalLayout() {
                    //Calculate the markers to get their position
                    LatLngBounds.Builder b = new LatLngBounds.Builder();
                    for (Marker m : markerList) {
                        b.include(m.getPosition());
                    }
                    // also include current location to include in the view
                    b.include(new LatLng(mLocation.getLatitude(),mLocation.getLongitude()));

                    LatLngBounds bounds = b.build();
                    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
                        mapView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
                    } else {
                        mapView.getViewTreeObserver().removeOnGlobalLayoutListener(this);
                    }
                    mGoogleMap.moveCamera(CameraUpdateFactory.newLatLngBounds(bounds, 50));
                }
            });
        }
    }

清楚的信息看这个url。 https://github.com/googlemaps/android-samples/blob/master/ApiDemos/app/src/main/java/com/example/mapdemo/MarkerDemoActivity.java

   //For adding a marker in Google map
        MarkerOptions mp = new MarkerOptions();
        mp.position(new LatLng(Double.parseDouble(latitude), Double.parseDouble(longitude)));
        mp.snippet(strAddress);
        map.addMarker(mp);

        try {

            b = new LatLngBounds.Builder();

            if (MapDetailsList.list != null && MapDetailsList.list.size() > 0) {

                for (int i = 0; i < MapDetailsList.list.size(); i++) {

                    b.include(new LatLng(Double.parseDouble(MapDetailsList.list.get(i).getLatitude()),
                            Double.parseDouble(MapDetailsList.list.get(i).getLongitude())));

                }
                LatLngBounds bounds = b.build();

                DisplayMetrics displayMetrics = getResources().getDisplayMetrics();
                int width = displayMetrics.widthPixels;
                int height = displayMetrics.heightPixels;

                // Change the padding as per needed
                CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width-200, height-200, 5);
                // map.setCenter(bounds.getCenter());

                map.animateCamera(cu);

            }

        } catch (Exception e) {

        }

http://i64.tinypic.com/2qjybh4.png

http://i63.tinypic.com/flzwus.png

http://i63.tinypic.com/112g5fm.png

我有类似的问题，使用以下代码解决了这个问题:

CameraUpdateFactory。newLatLngBounds(bounds, 200,200,5)通常在我的情况下，位置差异不超过两个相邻城市。

缩放以适应地图谷歌地图v2上的所有标记

谷歌地图V2

以下解决方案适用于Android棉花糖6 (API 23, API 24, API 25, API 26, API 27, API 28)。它也适用于Xamarin。

LatLngBounds.Builder builder = new LatLngBounds.Builder();

//the include method will calculate the min and max bound.
builder.include(marker1.getPosition());
builder.include(marker2.getPosition());
builder.include(marker3.getPosition());
builder.include(marker4.getPosition());

LatLngBounds bounds = builder.build();

int width = getResources().getDisplayMetrics().widthPixels;
int height = getResources().getDisplayMetrics().heightPixels;
int padding = (int) (width * 0.10); // offset from edges of the map 10% of screen

CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, width, height, padding);

mMap.animateCamera(cu);

对我来说很好。

从这段代码中，我在地图屏幕上显示特定缩放的多个标记。

//声明变量

private LatLngBounds bounds;
private LatLngBounds.Builder builder;

//添加多个标记点的方法

private void drawMarker(LatLng point, String text) {

        MarkerOptions markerOptions = new MarkerOptions();
        markerOptions.position(point).title(text).icon(BitmapDescriptorFactory.fromResource(R.drawable.icon));
        mMap.addMarker(markerOptions);
        builder.include(markerOptions.getPosition());

    }

//用于在地图上添加多个可见标记

@Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;
        builder = new LatLngBounds.Builder();
    for (int i = 0; i < locationList.size(); i++) {

        drawMarker(new LatLng(Double.parseDouble(locationList.get(i).getLatitude()), Double.parseDouble(locationList.get(i).getLongitude())), locationList.get(i).getNo());

     }
     bounds = builder.build();
     CameraUpdate cu = CameraUpdateFactory.newLatLngBounds(bounds, 0);
     mMap.animateCamera(cu);