Question

我的代码出了什么问题？。当我按下按钮时，为什么地图会显示默认位置？

这是我的setOnClickListener

 package test;
 import org.opencv.imgcodecs.Imgcodecs;

 import org.opencv.core.*;
 import org.opencv.imgproc.Imgproc;
 import org.opencv.highgui.Highgui;

 import java.util.*;

 import javax.swing.*;


 public class DMImageFactory {

   public void contours(String location) {

       System.loadLibrary(Core.NATIVE_LIBRARY_NAME);

        Mat image =Imgcodecs.imread(location);
        Mat dst=new Mat();

        Core.inRange(image, new Scalar(0,0,0), new Scalar(255,255,255),dst);

        if(dst.empty())
        System.out.print("empty matrix");

        Imshow im = new Imshow("Box1");
        im.showImage(image);

        List<MatOfPoint> contours = new ArrayList<>();
        Mat countour_result = Mat.zeros(image.size(), CvType.CV_8UC3);

       Imgproc.findContours(dst, contours, new Mat(),[enter image description here][1]Imgproc.RETR_TREE, Imgproc.CHAIN_APPROX_SIMPLE);

       Imgproc.drawContours(countour_result, contours, -1,new 
       Scalar(255,255,255));

       Imgcodecs.imwrite("/Users/pranay/Desktop/test/counterdetection_intermidiate.png",countour_result);

        System.out.print(contours+" ");

         for (MatOfPoint contour: contours) 
        Imgproc.fillPoly(countour_result, Arrays.asList(contour), new Scalar(255,255,255));

       Scalar green = new Scalar(81, 190, 0);

       for (MatOfPoint contour: contours) {
        RotatedRect rotatedRect = Imgproc.minAreaRect(new 
        MatOfPoint2f(contour.toArray()));
      drawRotatedRect(countour_result, rotatedRect, green, 4);
    }


     Imgcodecs.imwrite("/Users/pranay/Desktop/test/counterdetection.png",countour_result);


 }

 public static void drawRotatedRect(Mat image, RotatedRect rotatedRect, 
 Scalar color, int thickness) {
      Point[] vertices = new Point[4];
      rotatedRect.points(vertices);
      MatOfPoint points = new MatOfPoint(vertices);
      Imgproc.drawContours(image, Arrays.asList(points), -1, color, 
      thickness);
    }


 }

这是我的地图活动：

    holder.mapBtn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v ) {
            //if you need position, just use recycleViewHolder.getAdapterPosition();
            Toast.makeText(mContext, "OMG! The position is still here and is: "+holder.getAdapterPosition(), Toast.LENGTH_SHORT).show();
            Uri uri = Uri.parse("geo:35.2137,31.7683");
            Intent intent = new Intent(v.getContext(), MapsActivity.class );
            intent.putExtra("location",uri);
            mContext.startActivity(intent);
        }
    });

}

Answer 1

在OR方法中，从列表中获取纬度和经度（我在此处仅对其进行了硬编码，仅作为示例）。

onClick

在public void onClick(View v ) { double lat = 35.2137; double lng = 31.7683; Intent intent = new Intent(v.getContext(), MapsActivity.class ); intent.putExtra("lat",lat); intent.putExtra("lng",lng); mContext.startActivity(intent); }添加实例变量：

MapsActivity

现在，在private LatLng mLatLng;的{{1}}方法中执行此操作：

onCreate

请注意，-34和151是默认值。您可以选择您喜欢的任何坐标。

现在，您可以使用MapsActivity方法中的新坐标设置此值：

Intent intent = getIntent(); double lat = intent.getDoubleExtra("lat", -34); double lng = intent.getDoubleExtra("lng", 151); mLatLng = new LatLng(lat, lng);

如何在onClick上设置新的Map位置

1 个答案: