Custom marker in google maps in android with vecto

问题:

How can we achieve a map marker icon with vector asset file, the way google shows it like this, programatically:

Update:

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

this doesnot work when dealing with vector assets. The main reason to ask the question. The error with the above code:

java.lang.IllegalArgumentException: Failed to decode image. The provided image must be a Bitmap.

回答1:

I was looking for exact same requirement, and seeing this question made me happy at first, but same as @Shuddh I wasn't happy with the given answers.

To make my story short, I am using following code for this requirement:

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);
}

and a usage example:

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

Note: you may wish to use different bounding for your vectors, my vectors were 24dp in size and I've used a 48dp png image(blue-part, which can be a vector too) as background.

UPDATE: Adding screenshot as it was requested.

回答2:

You can use this method:

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);
}

So your code will look like:

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

回答3:

Might be a bit late to the game but this works great with 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);
}

Initialized as:

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

Usage:

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

Note: getMarkerIcon() just returns the initialized non null locationMarkerIcon member variable.

Screenshot:

回答4:

Try this

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>