Android Google Maps v2：如何使用多行代码段添加标记？

Question 1

有人知道如何在Google Maps标记中添加多行代码段吗？那是我添加标记的代码：

map.getMap().addMarker(new MarkerOptions()
    .position(latLng()).snippet(snippetText)
    .title(header).icon(icon));

我希望代码段看起来像这样：

| HEADER |
|foo     |
|bar     |

但是，当我尝试将snippetText设置为“ foo \ n bar”时，我看到的只是，foo bar而且我不知道如何使其变为多行。你能帮助我吗？

Question 2

看来您需要创建自己的“信息窗口”内容才能完成该工作：

创建InfoWindowAdapter该替代的实现，getInfoContents()以返回要放入InfoWindow框架中的内容
呼叫setInfoWindowAdapter()您GoogleMap，传递您的实例InfoWindowAdapter

此示例项目演示了该技术。使用"foo\nbar"正确的换行符替换我的代码片段。但是，更有可能的是，您只会想出一种避免使用换行符的布局，并TextView在所需的视觉效果中为每行提供单独的小部件。

Question 3

我已经完成了最简单的方法，如下所示：

private GoogleMap mMap;

虽然添加标记在谷歌地图：

LatLng mLatLng = new LatLng(YourLatitude, YourLongitude);

mMap.addMarker(new MarkerOptions().position(mLatLng).title("My Title").snippet("My Snippet"+"\n"+"1st Line Text"+"\n"+"2nd Line Text"+"\n"+"3rd Line Text").icon(BitmapDescriptorFactory.defaultMarker(BitmapDescriptorFactory.HUE_RED)));

之后，在Google Map上放置InfoWindow 适配器的以下代码：

mMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {

      @Override
      public View getInfoWindow(Marker arg0) {
         return null;
      }

      @Override
      public View getInfoContents(Marker marker) {

        LinearLayout info = new LinearLayout(mContext);
        info.setOrientation(LinearLayout.VERTICAL);

        TextView title = new TextView(mContext);
        title.setTextColor(Color.BLACK);
        title.setGravity(Gravity.CENTER);
        title.setTypeface(null, Typeface.BOLD);
        title.setText(marker.getTitle());

        TextView snippet = new TextView(mContext);
        snippet.setTextColor(Color.GRAY);
        snippet.setText(marker.getSnippet());

        info.addView(title);
        info.addView(snippet);

      return info;
    }
});

希望对您有帮助。

Question 4

建立在了Hiren Patel的答案安德鲁小号建议：

 mMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {

        @Override
        public View getInfoWindow(Marker arg0) {
            return null;
        }

        @Override
        public View getInfoContents(Marker marker) {

            Context context = getApplicationContext(); //or getActivity(), YourActivity.this, etc.

            LinearLayout info = new LinearLayout(context);
            info.setOrientation(LinearLayout.VERTICAL);

            TextView title = new TextView(context);
            title.setTextColor(Color.BLACK);
            title.setGravity(Gravity.CENTER);
            title.setTypeface(null, Typeface.BOLD);
            title.setText(marker.getTitle());

            TextView snippet = new TextView(context);
            snippet.setTextColor(Color.GRAY);
            snippet.setText(marker.getSnippet());

            info.addView(title);
            info.addView(snippet);

            return info;
        }
    });

Question 5

基于Hiren Patel解决方案。此代码创建一个TextViewfrom布局，而不是从零开始。一个显着的区别是：如果您有集群，则在单击集群时不会看到空白标签。

override fun onMapReady(googleMap: GoogleMap) {
    this.googleMap = googleMap
    ...

    // Use this anonymous class or implement GoogleMap.InfoWindowAdapter.
    googleMap.setInfoWindowAdapter(object : GoogleMap.InfoWindowAdapter {
        override fun getInfoContents(marker: Marker): View? {
            return null
        }

        override fun getInfoWindow(marker: Marker): View? =
            if (marker.title == null)
                null
            else {
                val inflater = LayoutInflater.from(context)
                val view = inflater.inflate(R.layout.layout_marker, null, false)
                view.label.text = marker.title
    
                view
            }
    })

layout_marker.xml：

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/label"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:paddingLeft="5dp"
    android:paddingRight="5dp"
    android:paddingTop="4dp"
    android:paddingBottom="4dp"
    android:textColor="$f0f0f0"
    android:textSize="12sp"
    tools:text="Marker"
    android:background="#00aaee"
    />

Question 6

相同的代码，但在Kotlin中：

    mMap?.setInfoWindowAdapter(object : InfoWindowAdapter {
        override fun getInfoWindow(arg0: Marker): View? {
            return null
        }
        
        override fun getInfoContents(marker: Marker): View {
            val info = LinearLayout(applicationContext)
            info.orientation = LinearLayout.VERTICAL
            val title = TextView(applicationContext)
            title.setTextColor(Color.BLACK)
            title.gravity = Gravity.CENTER
            title.setTypeface(null, Typeface.BOLD)
            title.text = marker.title
            val snippet = TextView(applicationContext)
            snippet.setTextColor(Color.GRAY)
            snippet.text = marker.snippet
            info.addView(title)
            info.addView(snippet)
            return info
        }
    })

Question 7

mMap.setOnMapClickListener（new GoogleMap.OnMapClickListener（）{

        @Override
        public void onMapClick(LatLng point) {

            // Already two locations
            if (markerPoints.size() > 1) {
                markerPoints.clear();
                mMap.clear();
            }

            // Adding new item to the ArrayList
            markerPoints.add(point);

            // Creating MarkerOptions
            MarkerOptions options = new MarkerOptions();

            // Setting the position of the marker

            options.position(point);
            if (markerPoints.size() == 1) {
                options.icon(BitmapDescriptorFactory.fromResource(R.mipmap.markerss)).title("Qtrip").snippet("Balance:\nEta:\nName:");
                options.getInfoWindowAnchorV();
            } else if (markerPoints.size() == 2) {
                options.icon(BitmapDescriptorFactory.fromResource(R.mipmap.markerss)).title("Qtrip").snippet("End");
            }
            mMap.setInfoWindowAdapter(new GoogleMap.InfoWindowAdapter() {

                @Override
                public View getInfoWindow(Marker arg0) {
                    return null;
                }

                @Override
                public View getInfoContents(Marker marker) {

                    Context context = getApplicationContext(); //or getActivity(), YourActivity.this, etc.

                    LinearLayout info = new LinearLayout(context);
                    info.setOrientation(LinearLayout.VERTICAL);

                    TextView title = new TextView(context);
                    title.setTextColor(Color.BLACK);
                    title.setGravity(Gravity.CENTER);
                    title.setTypeface(null, Typeface.BOLD);
                    title.setText(marker.getTitle());

                    TextView snippet = new TextView(context);
                    snippet.setTextColor(Color.GRAY);
                    snippet.setText(marker.getSnippet());

                    info.addView(title);
                    info.addView(snippet);

                    return info;
                }
            });
            mMap.addMarker(options);