如何在Google Maps V2 Android 中指定Marker 上图标的大小

Question

In may app i use Map from Google Maps V2 and in this map i am trying to add markers each Marker with an icon, but the marker is taking the size of the icon which is making the icon looks flue. How can i specify the size of the marker in dp so that i can control how it looks like on the map

Answer 1

Currently it's not possible to specify a marker size using MarkerOptions , so your only option is to rescale your Bitmap before setting it as your marker icon.

Creating the scaled Bitmap:

int height = 100;
int width = 100;
BitmapDrawable bitmapdraw = (BitmapDrawable)getResources().getDrawable(R.mipmap.marker);
Bitmap b = bitmapdraw.getBitmap();
Bitmap smallMarker = Bitmap.createScaledBitmap(b, width, height, false);

Using smallMarker as the marker icon:

map.addMarker(new MarkerOptions()
        .position(POSITION)
        .title("Your title")
        .icon(BitmapDescriptorFactory.fromBitmap(smallMarker))
);

Answer 2

The accepted answer is outdated ( Resources::getDrawable has been deprecated since API level 22). Here's an updated version:

int height = 100;
int width = 100;
Bitmap b = BitmapFactory.decodeResource(getResources(), R.drawable. marker);
Bitmap smallMarker = Bitmap.createScaledBitmap(b, width, height, false);
BitmapDescriptor smallMarkerIcon = BitmapDescriptorFactory.fromBitmap(smallMarker);

and then apply it in MarkerOption

.icon(smallMarkerIcon)

Answer 3

Kotlin version I used 0- 9 answer and used it with kotlin

fun generateHomeMarker(context: Context): MarkerOptions {
    return MarkerOptions()
        .icon(BitmapDescriptorFactory.fromBitmap(generateSmallIcon(context)))
}

fun generateSmallIcon(context: Context): Bitmap {
    val height = 100
    val width = 100
    val bitmap = BitmapFactory.decodeResource(context.resources, R.drawable.logo)
    return Bitmap.createScaledBitmap(bitmap, width, height, false)
}

Answer 4

我想你可以在这个问题上寻找答案，它已经解释了如何通过创建动态位图来创建具有给定宽度和高度的自定义标记。

Answer 5

Drawable circleDrawable = getResources().getDrawable(R.mipmap.primarysplitter);
bitmapDescriptor = getMarkerIconFromDrawable(circleDrawable);

private BitmapDescriptor getMarkerIconFromDrawable(Drawable drawable) {
    Canvas canvas = new Canvas();
    Bitmap bitmap = Bitmap.createBitmap(drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
    canvas.setBitmap(bitmap);
    drawable.setBounds(0, 0, (int)getResources().getDimension(R.dimen._30sdp), (int)getResources().getDimension(R.dimen._30sdp));
    drawable.draw(canvas);
    return BitmapDescriptorFactory.fromBitmap(bitmap);
}