谷歌地图中的自定义标记在android与矢量资产图标

时间：2017-02-21 11:08:38

标签： android google-maps-markers google-maps-android-api-2

我们如何使用矢量资源文件实现地图标记图标，google以这样的方式显示它，以编程方式显示：

map

更新：

map.addMarker(new MarkerOptions()
    .position(latLng)
    .icon(BitmapDescriptorFactory.fromResource(R.drawable.your_vector_asset))
    .title(title);

这在处理矢量资产时不起作用。提出问题的主要原因。上述代码出错：

  

java.lang.IllegalArgumentException：无法解码图像。提供的图像必须是位图。

9 个答案:

答案 0 :(得分：56)

您可以使用此方法：

private BitmapDescriptor bitmapDescriptorFromVector(Context context, int vectorResId) {
        Drawable vectorDrawable = ContextCompat.getDrawable(context, vectorResId);
        vectorDrawable.setBounds(0, 0, vectorDrawable.getIntrinsicWidth(), vectorDrawable.getIntrinsicHeight());
        Bitmap bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(), vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        vectorDrawable.draw(canvas);
        return BitmapDescriptorFactory.fromBitmap(bitmap);
}

所以你的代码看起来像是：

map.addMarker(new MarkerOptions()
                .position(latLng)
                .icon(bitmapDescriptorFromVector(getActivity(), R.drawable.your_vector_asset))
                .title(title);

答案 1 :(得分：12)

我一直在寻找完全相同的要求，看到这个问题一开始让我开心，但和@Shuddh一样，我对给定的答案不满意。

为了简化我的故事，我使用以下代码来满足此要求：

private BitmapDescriptor bitmapDescriptorFromVector(Context context, @DrawableRes  int vectorDrawableResourceId) {
    Drawable background = ContextCompat.getDrawable(context, R.drawable.ic_map_pin_filled_blue_48dp);
    background.setBounds(0, 0, background.getIntrinsicWidth(), background.getIntrinsicHeight());
    Drawable vectorDrawable = ContextCompat.getDrawable(context, vectorDrawableResourceId);
    vectorDrawable.setBounds(40, 20, vectorDrawable.getIntrinsicWidth() + 40, vectorDrawable.getIntrinsicHeight() + 20);
    Bitmap bitmap = Bitmap.createBitmap(background.getIntrinsicWidth(), background.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    background.draw(canvas);
    vectorDrawable.draw(canvas);
    return BitmapDescriptorFactory.fromBitmap(bitmap);
}

和一个用法示例：

.icon(bitmapDescriptorFromVector(this, R.drawable.ic_car_white_24dp));

注意：您可能希望对矢量使用不同的边界，我的矢量大小为24dp，我使用了48dp的png图像（蓝色部分，也可以是矢量）作为背景。

更新：根据请求添加屏幕截图。

Screenshot for end result

答案 2 :(得分：5)

这是科特林爱好者的代码;）

private fun bitMapFromVector(vectorResID:Int):BitmapDescriptor {
    val vectorDrawable=ContextCompat.getDrawable(context!!,vectorResID)
    vectorDrawable!!.setBounds(0,0,vectorDrawable!!.intrinsicWidth,vectorDrawable.intrinsicHeight)
    val bitmap=Bitmap.createBitmap(vectorDrawable.intrinsicWidth,vectorDrawable.intrinsicHeight,Bitmap.Config.ARGB_8888)
    val canvas=Canvas(bitmap)
    vectorDrawable.draw(canvas)
    return BitmapDescriptorFactory.fromBitmap(bitmap)
}

答案 3 :(得分：1)

可能会有点迟到，但这适用于Google Maps v2：

public static BitmapDescriptor getBitmapFromVector(@NonNull Context context,
                                                   @DrawableRes int vectorResourceId,
                                                   @ColorInt int tintColor) {

    Drawable vectorDrawable = ResourcesCompat.getDrawable(
            context.getResources(), vectorResourceId, null);
    if (vectorDrawable == null) {
        Log.e(TAG, "Requested vector resource was not found");
        return BitmapDescriptorFactory.defaultMarker();
    }
    Bitmap bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(),
            vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    vectorDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
    DrawableCompat.setTint(vectorDrawable, tintColor);
    vectorDrawable.draw(canvas);
    return BitmapDescriptorFactory.fromBitmap(bitmap);
}

初始化为： 

locationMarkerIcon = LayoutUtils.getBitmapFromVector(ctx, R.drawable.ic_location_marker,
                ContextCompat.getColor(ctx, R.color.marker_color));

<强>用法： 

googleMap.addMarker(MarkerOptions().icon(getMarkerIcon()).position(latLng));

注意：getMarkerIcon()只返回初始化的非null locationMarkerIcon成员变量。

<强>截图：

enter image description here

答案 4 :(得分：0)

将矢量资源转换为位图对象并使用BitmapDescriptorFactory.fromBitmap(bitmap) 

   Bitmap bitmap = getBitmapFromVectorDrawable(getContext(),R.drawable.ic_pin);
   BitmapDescriptor descriptor =BitmapDescriptorFactory.fromBitmap(bitmap);
   MarkerOptions markerOptions = new MarkerOptions();
   markerOptions.icon(descriptor);

位图转换器： 

 public static Bitmap getBitmapFromVectorDrawable(Context context, int drawableId) {
        Drawable drawable =  AppCompatResources.getDrawable(context, drawableId)
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
            drawable = (DrawableCompat.wrap(drawable)).mutate();
        }

        Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(),
                drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);

        return bitmap;
    }

答案 5 :(得分：0)

如果有人在Kotlin中寻找东西，这是适合您的方法：

  private fun  bitmapDescriptorFromVector(context: Context, vectorResId:Int):BitmapDescriptor {
            var vectorDrawable = ContextCompat.getDrawable(context, vectorResId);
            vectorDrawable!!.setBounds(0, 0, vectorDrawable.getIntrinsicWidth(), vectorDrawable.getIntrinsicHeight());
            var bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(), vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
            var canvas =  Canvas(bitmap);
            vectorDrawable.draw(canvas);
            return BitmapDescriptorFactory.fromBitmap(bitmap);
}

上述方法会将您的矢量图标转换为bitmapdescritor 

map.addMarker(new MarkerOptions()
                .position(latLng)
                .icon(bitmapDescriptorFromVector(getActivity(), R.drawable.your_vector_asset))
                .title(title)

这是一个为您的地图设置标记的工具，感谢Leo Droidcoder从他的回答中得到的回报，我将其转换为Kotlin

答案 6 :(得分：0)

在Kotlin中：我使用以下代码在Marker上显示SVG图像。在这里，我没有使用背景色/ SVG。

fun getBitmapDescriptorFromVector(context: Context, @DrawableRes vectorDrawableResourceId: Int): BitmapDescriptor? {

    val vectorDrawable = ContextCompat.getDrawable(context, vectorDrawableResourceId)
    val bitmap = Bitmap.createBitmap(vectorDrawable!!.intrinsicWidth, vectorDrawable.intrinsicHeight, Bitmap.Config.ARGB_8888)
    val canvas = Canvas(bitmap)
    vectorDrawable.setBounds(0, 0, canvas.width, canvas.height)
    vectorDrawable.draw(canvas)

    return BitmapDescriptorFactory.fromBitmap(bitmap)
}

以这种方式使用：

googleMap?.addMarker(MarkerOptions().position(LatLng(it.latitude!!, it.longitude!!))
            .title(it.airLineDetails))?.setIcon(
            getBitmapDescriptorFromVector(requireContext(), R.drawable.ic_flight_blue))

屏幕截图：

答案 7 :(得分：-1)

试试这个

MarkerOptions op = new MarkerOptions();
op.position(src_latlng);
Marker origin_marker = googleMap.addMarker(op);

Bitmap bitmap = getBitmap(this,R.drawable.ic_map_marker);
origin_marker.setIcon(BitmapDescriptorFactory.fromBitmap(bitmap));

getBitmap 

public Bitmap getBitmap(Context context, int drawableId) {
   Drawable drawable = ContextCompat.getDrawable(context, drawableId);
   if (drawable instanceof BitmapDrawable) {
       return BitmapFactory.decodeResource(context.getResources(), drawableId);
   } else if (drawable instanceof VectorDrawable) {
       return getBitmap((VectorDrawable) drawable);
   } else {
       throw new IllegalArgumentException("unsupported drawable type");
   }
}

ic_map_marker.xml 

<vector android:height="32dp" android:viewportHeight="512.0"
    android:viewportWidth="512.0" android:width="32dp" xmlns:android="http://schemas.android.com/apk/res/android">
    <path android:fillColor="#f32f00" android:pathData="M288,284.8V480l-64,32V284.8c10.3,2.1 21,3.3 32,3.3S277.7,286.9 288,284.8zM384,128c0,70.7 -57.3,128 -128,128c-70.7,0 -128,-57.3 -128,-128S185.3,0 256,0C326.7,0 384,57.3 384,128zM256,64c0,-17.7 -14.3,-32 -32,-32s-32,14.3 -32,32s14.3,32 32,32S256,81.7 256,64z"/>
</vector>

答案 8 :(得分：-1)

对于Kotlin用户。请检查下面的代码。我发现Fragment类。

class MapPinFragment : Fragment() {

    private lateinit var googleMap1: GoogleMap

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        return inflater.inflate(R.layout.fragment_map_pin, container, false)
    }

    override fun onActivityCreated(savedInstanceState: Bundle?) {
        super.onActivityCreated(savedInstanceState)
        mapView.onCreate(savedInstanceState)
        mapView.onResume()

    }

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)


        mapView.getMapAsync { googleMap ->
            googleMap1 = googleMap as GoogleMap
            addCustomMarker()
        }

    }

    private fun addCustomMarker() {
        Log.d("addCustomMarker", "addCustomMarker()")
        if (googleMap1 == null) {
            return
        }
        // adding a marker on map with image from  drawable
        googleMap1.addMarker(
            MarkerOptions()
                .position(LatLng(23.0225 , 72.5714))
                .icon(BitmapDescriptorFactory.fromBitmap(getMarkerBitmapFromView()))
        )
    }

    override fun onDestroy() {
        super.onDestroy()
        if (mapView != null)
            mapView.onDestroy()
    }
    override fun onLowMemory() {
        super.onLowMemory()
        mapView.onLowMemory()
    }

    private fun getMarkerBitmapFromView(): Bitmap? {
        val customMarkerView: View? = layoutInflater.inflate(R.layout.view_custom_marker, null)
//        val markerImageView: ImageView =
//            customMarkerView.findViewById<View>(R.id.profile_image) as ImageView
        customMarkerView?.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED );
        customMarkerView?.layout(0, 0, customMarkerView.measuredWidth, customMarkerView.measuredHeight);
        customMarkerView?.buildDrawingCache();
        val returnedBitmap = Bitmap.createBitmap(
            customMarkerView!!.measuredWidth, customMarkerView.measuredHeight,
            Bitmap.Config.ARGB_8888
        )
        val canvas = Canvas(returnedBitmap)
        canvas.drawColor(Color.WHITE, PorterDuff.Mode.SRC_IN)
        val drawable = customMarkerView.background

        drawable?.draw(canvas);
        customMarkerView.draw(canvas);
        return returnedBitmap;

    }




}
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