描画可能ファイルを使用せずに、地図上の下向きの

Question

want marker like in the image. i have made a custom marker with a circular image but unable to add the ring around the circular image pointing down programmatically.

private GoogleMap mMap; 

@Override 
protected void onCreate(Bundle savedInstanceState) 
{ 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_maps); 
    // Obtain the SupportMapFragment and get notified when the map is ready to be used. 
    SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager() 
      .findFragmentById(R.id.map); 
    mapFragment.getMapAsync(this); 

} 


/** 
* Manipulates the map once available. 
* This callback is triggered when the map is ready to be used. 
* This is where we can add markers or lines, add listeners or move the camera. In this case, 
* we just add a marker near Sydney, Australia. 
* If Google Play services is not installed on the device, the user will be prompted to install 
* it inside the SupportMapFragment. This method will only be triggered once the user has 
* installed Google Play services and returned to the app. 
*/ 
@Override 
public void onMapReady(GoogleMap googleMap) 
{ 
    mMap = googleMap; 

    Bitmap scaled = Bitmap.createScaledBitmap(BitmapFactory.decodeResource(getResources(), 
      R.drawable.ab), 120, 120, true); 

    Bitmap image=getCircularBitmap(scaled); 

//キャンバス // canvas1.drawBitmap（スケーリングし、0,0、色）を変更します。

// Add a marker in Sydney and move the camera 
    LatLng sydney = new LatLng(-34, 151); 
    MarkerOptions markerOptions = new MarkerOptions(); 
    markerOptions.position(sydney); 
    markerOptions.icon(BitmapDescriptorFactory.fromBitmap(image)); 

    mMap.addMarker(markerOptions); 
    mMap.moveCamera(CameraUpdateFactory.newLatLng(sydney)); 
} 

public Bitmap getCircularBitmap(Bitmap bitmap) 
{ 
    Bitmap output; 

    if (bitmap.getWidth() > bitmap.getHeight()) { 
     output = Bitmap.createBitmap(bitmap.getHeight(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); 
    } else { 
     output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getWidth(), Bitmap.Config.ARGB_8888); 
    } 

    Canvas canvas = new Canvas(output); 

    final int color = 0xff424242; 
    final Paint paint = new Paint(); 

    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 

    float r = 0; 

    if (bitmap.getWidth() > bitmap.getHeight()) { 
     r = bitmap.getHeight()/2; 
    } else { 
     r = bitmap.getWidth()/2; 
    } 

    paint.setAntiAlias(true); 
    canvas.drawARGB(0, 0, 0, 0); 
    paint.setColor(color); 
    canvas.drawCircle(r, r, r, paint); 
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); 
    canvas.drawBitmap(bitmap, rect, rect, paint); 

    return output 

Answer 1

開発者はdocumentationに示すようBitmapDescriptorFactoryを通して渡される描画可能を使用する必要があります。画像の周りのリングは画像そのものの一部でなければなりません。もし提供された画像のように多色であれば、マーカーのために複数のテンプレートを使うことができます。

希望すると便利です。