Question

对于Android应用，我需要为我的Google地图活动设置自定义标记。标准选项对我没有帮助。使用可以为每个标记设置的businesslogo实现正确图标的最佳方法是什么？

更新：

对不起，要么我不够清楚，要么我都看不到。我无法在文档或你给我的提示中找到很多有用的东西。现在我构建了一个默认标记：

我在运行时需要将大量的个人资料图片或徽标放在标记内，具体取决于某些条件，例如：

Answer 1

有一个documentation关于在某个位置添加自定义标记。

private static final LatLng MELBOURNE = new LatLng(-37.813, 144.962);
private Marker melbourne = mMap.addMarker(new MarkerOptions()
                            .position(MELBOURNE)
                            .title("Melbourne")
                            .snippet("Population: 4,137,400")
                        .icon(BitmapDescriptorFactory.fromResource(R.drawable.arrow)));

Answer 2

要制作自定义视图，您必须使用MarkerDemoActivity类来使用自定义标记。如果您使用的是Google地图Api V2.0。

以及为标记制作自定义视图的其他解决方案。添加此代码以添加地图标记：

Marker myLocMarker = map.addMarker(new MarkerOptions()
        .position(myLocation)
        .icon(BitmapDescriptorFactory.fromBitmap(writeTextOnDrawable(R.drawable.bluebox, "your text goes here"))));

writeTextOnDrawable（）方法：

private Bitmap writeTextOnDrawable(int drawableId, String text) {

Bitmap bm = BitmapFactory.decodeResource(getResources(), drawableId)
        .copy(Bitmap.Config.ARGB_8888, true);

Typeface tf = Typeface.create("Helvetica", Typeface.BOLD);

Paint paint = new Paint();
paint.setStyle(Style.FILL);
paint.setColor(Color.WHITE);
paint.setTypeface(tf);
paint.setTextAlign(Align.CENTER);
paint.setTextSize(convertToPixels(context, 11));

Rect textRect = new Rect();
paint.getTextBounds(text, 0, text.length(), textRect);

Canvas canvas = new Canvas(bm);

//If the text is bigger than the canvas , reduce the font size
if(textRect.width() >= (canvas.getWidth() - 4))     //the padding on either sides is considered as 4, so as to appropriately fit in the text
    paint.setTextSize(convertToPixels(context, 7));        //Scaling needs to be used for different dpi's

//Calculate the positions
int xPos = (canvas.getWidth() / 2) - 2;     //-2 is for regulating the x position offset

//"- ((paint.descent() + paint.ascent()) / 2)" is the distance from the baseline to the center.
int yPos = (int) ((canvas.getHeight() / 2) - ((paint.descent() + paint.ascent()) / 2)) ;  

    canvas.drawText(text, xPos, yPos, paint);

    return  bm;
}


public static int convertToPixels(Context context, int nDP)
{
    final float conversionScale = context.getResources().getDisplayMetrics().density;

    return (int) ((nDP * conversionScale) + 0.5f) ;

}

有关详细信息，请参阅此link.

Answer 3

所以我就是这样做的，我构建了两张照片。标记如上所示，另一个通过以下函数（所有代码都在stackoverflow上找到）：

public static Bitmap getCircleBitmap(Bitmap bm) {
    int sice = Math.min((bm.getWidth()), (bm.getHeight()));
    Bitmap bitmap = ThumbnailUtils.extractThumbnail(bm, sice, sice);
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);
    final int color = 0xffff0000;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);
    paint.setAntiAlias(true);
    paint.setDither(true);
    paint.setFilterBitmap(true);
    canvas.drawARGB(0, 0, 0, 0);
    paint.setColor(color);
    canvas.drawOval(rectF, paint);
    paint.setColor(Color.BLUE);
    paint.setStyle(Paint.Style.STROKE);
    paint.setStrokeWidth((float) 4);
    paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
    canvas.drawBitmap(bitmap, rect, rect, paint);
    return output;
}

然后我将它们传递给以下函数

public static Bitmap overlay(Bitmap bmp1, Bitmap bmp2) {
    Bitmap bmOverlay = Bitmap.createBitmap(bmp1.getWidth(), bmp1.getHeight(), bmp1.getConfig());
    Canvas canvas = new Canvas(bmOverlay);
    canvas.drawBitmap(bmp1, new Matrix(), null);
    canvas.drawBitmap(bmp2, 5, 5, null);
    return bmOverlay;
}

我知道这可能不是最好的方法，特别是我不喜欢标记中圆圈位置的硬编码。但到目前为止工作

Google地图自定义标记与商业徽标

3 个答案: