Android - 相机变焦不起作用

Question

我创建了一个应用程序.在我是随机产生latitude,并longitude在GoogleMap并通过该值下页..即CameraPage.但是,在CameraPage上,引脚没有像地图上那样正常掉落..我已经实现了camera-zoom其他方法,但仍然无法正常工作..

请检查屏幕截图..

MapPage

CameraPage

是否有任何解决方案可以缩放相机上的引脚而无需外部变焦控制？

它应该在CameraPage加载时默认缩放..

编辑::

码::

ArrayList<Point> props = new ArrayList<Point>();
            props.add(new Point(a_latitude, a_longitude, a_username));
            props.add(new Point(b_latitude, b_longitude, b_username));
            props.add(new Point(c_latitude, c_longitude, c_username));
            props.add(new Point(d_latitude, d_longitude, d_username));
            props.add(new Point(e_latitude, e_longitude, e_username));
            props.add(new Point(f_latitude, f_longitude, f_username));
            props.add(new Point(g_latitude, g_longitude, g_username));
            props.add(new Point(h_latitude, h_longitude, h_username));
            props.add(new Point(i_latitude, i_longitude, i_username));
            props.add(new Point(j_latitude, j_longitude, j_username));


    mPaint.setColor(Color.BLACK);
    mPaint.setTextSize(30);
    mPaint.setStrokeWidth(DpiUtils.getPxFromDpi(getContext(), 2));
    mPaint.setAntiAlias(true);      


    mSpots = new Bitmap[props.size()];
    for (int i = 0; i < mSpots.length; i++) 
        mSpots[i] = BitmapFactory.decodeResource(context.getResources(), R.drawable.google_pin_new);

点类::

public class Point {
public double longitude = 0f;
public double latitude = 0f;
public String description;


public Point(double d, double e, String string) {
    // TODO Auto-generated constructor stub
    this.latitude = d;
    this.longitude = e;
    this.description = string;

  } 

}

Answer 1

而不是使用经度和纬度来绘制你的积分.

使用该功能toScreenLocation.例如,以下行将返回一个Point表示您应该绘制位置标记的坐标.

android.graphics.Point p = mMap.getProjection().toScreenLocation(location);
props.add(new Point(p.X, p.Y, a_username));