3月17日

继续用svg来实现中国地图，先要找svg格式的中国地图，然后按找Javaweb的形式传入需要的对象集，实现点击地图某处显示高亮并弹出相应的数据具体代码如下：

import android.annotation.SuppressLint;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.RectF;
import android.os.Handler;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.core.graphics.PathParser;


import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import java.io.InputStream;
import java.util.ArrayList;

import java.util.List;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import db.dao.quanbandao;


public class MapView extends View {
    private static final String TestApp="TestApp";
    private Paint paint;
    private Context mContext;
    private List<PathItem> pathItemList=new ArrayList<>();
    private int[] colors = new int[]{Color.RED,Color.YELLOW,Color.GRAY, Color.GREEN};
    private PathItem selectPathItem;
    public MapView(Context context) {
        super(context);
    }

    public MapView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        init(context);
    }

    private void init(Context context) {
        this.mContext=context;
        this.paint=new Paint();
        thread.start();
    }
    private Thread thread=new Thread(new Runnable() {//在子线程
        @Override
        public void run() {
             InputStream inputStream = mContext.getResources().openRawResource(R.raw.china);//获取svg文件
            DocumentBuilderFactory documentBuilderFactory=DocumentBuilderFactory.newInstance();//对svg进行解析
            try {
                DocumentBuilder documentBuilder=documentBuilderFactory.newDocumentBuilder();
                Document document = documentBuilder.parse(inputStream);//获取到了svg
                Element documentElement = document.getDocumentElement();//获取根节点
                NodeList nodeList = document.getElementsByTagName("path");//获取子节点

                float left=-1,top=-1,right=-1,bottom=-1;
                for(int i=0;i<nodeList.getLength();i++){
                    Element element= (Element) nodeList.item(i);
                    String pathdata = element.getAttribute("android:pathData");
                    String shen=element.getAttribute("android:provice");

                     @SuppressLint("RestrictedApi") Path path= PathParser.createPathFromPathData(pathdata);
                    PathItem pathItem=new PathItem(path);
                    pathItem.setName(shen);
                    quanbandao dao= quanbandao.getInstance(getContext());
                   // Log.d(TestApp,shen);
                    int num=0;
                    num=dao.findren(shen);
                    Log.d(TestApp,""+num);

                    if(num>=12){
                        pathItem.setColor(colors[0]);
                    }
                    else if(num<12&&num>=5){
                        pathItem.setColor(colors[1]);
                    }
                    else if(num<5&&num>0){
                        pathItem.setColor(colors[2]);
                    }
                    else if(num==0){
                        pathItem.setColor(colors[3]);
                    }

                    pathItemList.add(pathItem);


//                    RectF rectF=new RectF();
//                    path.computeBounds(rectF,true);
//
//                    left=left==-1?rectF.left:Math.min(rectF.left,left);
//                    right=right==-1?rectF.right:Math.min(rectF.right,right);
//                    bottom=bottom==-1?rectF.bottom:Math.min(rectF.bottom,bottom);
//                    top=top==-1?rectF.top:Math.min(rectF.top,top);

                }
                handler.sendEmptyMessage(1);//数据处理完成可以进行画
            } catch (Exception e) {//此处要抛出两处异常，这样写抛出所有异常
                e.printStackTrace();
            }
        }
    });

    private Handler handler=new Handler(){
        @Override
        public void handleMessage(@NonNull Message msg) {
            super.handleMessage(msg);
            invalidate();//刷新
        }
    };

    @Override
    protected void onDraw(Canvas canvas) {
        quanbandao dao= quanbandao.getInstance(getContext());
        super.onDraw(canvas);
        for(PathItem pathItem:pathItemList){
            pathItem.drawItem(canvas,paint,false);
        }
        if(selectPathItem!=null){
            selectPathItem.drawItem(canvas,paint,true);
            Toast.makeText(getContext(), selectPathItem.getName()+"省上报体温正常"+dao.findren(selectPathItem.getName())+"人,未上报人数0人，体温异常人数0人", Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        onTouch(event.getX(),event.getY());
        return super.onTouchEvent(event);
    }

    private void onTouch(float x, float y) {
        for(PathItem pathItem:pathItemList){
           if( pathItem.isTouch(x,y)){
                selectPathItem=pathItem;
           }
        }
        if(selectPathItem!=null){
            invalidate();
        }
    }


}此操作相当于自己定义一个view控件，在此控件文件中进行设定及数据操作，然后将此view控件写在activity中进行显示。