Kotlin，Android Studio 中的自定义 .svg 谷歌地图标记

Question

我想使用 .svg 文件作为地图标记。在 MapsActivity.kt 我写道：

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

...还有这个：

mMap.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney").icon(bitmapDescriptorFromVector(getActivity(), R.drawable.marker3)))

最后的“marker3”被创建为新的矢量资产。运行时出现此错误：

C:.....\MyApplication3\app\src\main\java\com\example\myapplication3\MapsActivity.kt: (58, 115): 不能使用提供的参数调用以下函数： public open fun getActivity(p0: Context!, p1: Int, @NonNull p2: Intent, p3: Int, @Nullable p4: Bundle?): PendingIntent！在 android.app.PendingIntent 中定义 public open fun getActivity(p0: Context!, p1: Int, p2: Intent!, p3: Int): PendingIntent!在 android.app.PendingIntent 中定义

请帮忙！

完整的 MapsActivity.kt：

   package com.example.myapplication3

import android.app.PendingIntent.getActivity
import android.content.Context
import android.graphics.Bitmap
import android.graphics.Canvas
import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity
import androidx.core.content.ContextCompat
import com.google.android.gms.maps.CameraUpdateFactory
import com.google.android.gms.maps.GoogleMap
import com.google.android.gms.maps.OnMapReadyCallback
import com.google.android.gms.maps.SupportMapFragment
import com.google.android.gms.maps.model.BitmapDescriptor
import com.google.android.gms.maps.model.BitmapDescriptorFactory
import com.google.android.gms.maps.model.LatLng
import com.google.android.gms.maps.model.MarkerOptions


class MapsActivity : AppCompatActivity(), OnMapReadyCallback {

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

private lateinit var mMap: GoogleMap

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_maps)
    // Obtain the SupportMapFragment and get notified when the map is ready to be used.
    val mapFragment = supportFragmentManager
        .findFragmentById(R.id.map) as SupportMapFragment
    mapFragment.getMapAsync(this)
}
 */


override fun onMapReady(googleMap: GoogleMap) {
    mMap = googleMap

    // Add a marker in Sydney and move the camera
    val sydney = LatLng(-34.0, 151.0)
    mMap.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney").icon(bitmapDescriptorFromVector(getActivity(), R.drawable.marker3)))
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney))
}

}

Answer 1

您的MapsActivity 应该显示编译时错误，因为您对getActivity() 的调用是错误的。而不是使用getActivity()，而是使用this，因为它在Activity内部。检查以下：

mMap.addMarker(MarkerOptions().position(sydney).title("Marker in Sydney").icon(bitmapDescriptorFromVector(this, R.drawable. marker3)))