Question

这看起来应该有些微不足道，但是在我的Android应用程序中，我使用画布绘制一系列连接在一起的线条。由于某种原因，我的线条非常微弱和薄。我想知道如何让我的线条变粗？这是我的代码..

for(int i=1; i<myArrayListOfValues.size(); i++){

        Paint myPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
        myPaint.setStrokeWidth(8/*1 /getResources().getDisplayMetrics().density*/);
        myPaint.setColor(0xffff0000);   //color.RED

        canvas.drawLine(myArrayListOfValues.get(i), myArrayListOfValues.get(i), myArrayListOfValues.get(i-1), myArrayListOfValues.get(i-1), myPaint);       

    }

另一件事是我绘制的线条和圆圈总是黑色的.setColor（）似乎从来没有任何效果。我尝试过使用颜色名称（例如color.red）甚至是十六进制值（例如0xffff0000）

Answer 1

更改

的值

myPaint.setStrokeWidth(50);

为更大的整数，例如：

    import java.awt.Color;
import java.awt.Container;
import javax.swing.*;
import javax.swing.event.MenuEvent;
import javax.swing.event.MenuListener;

class menuListener implements MenuListener {

    @Override
    public void menuSelected(MenuEvent e) {
        // TODO Auto-generated method stub
        System.out.println("menu clicked !");
        System.exit(0);
    }

    @Override
    public void menuDeselected(MenuEvent e) {
        // TODO Auto-generated method stub

    }

    @Override
    public void menuCanceled(MenuEvent e) {
        // TODO Auto-generated method stub

    }

}

public class pcMain extends JFrame implements Runnable {
    userSeat us;
    int user;
    JPanel[] userSeat;
    Container con;
    JPanel leftPane, rightPane;
    JMenuBar jm;
    JMenu exit;

    public pcMain(int user) {

        super("Pc Management Application");

        con = getContentPane();
        con.setBackground(new Color(0, 128, 128));

        setVisible(true);
        setSize(1100, 500);
        // setLayout(null);
        this.setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // Menu bar
        jm = new JMenuBar();

        // Menu items
        exit = new JMenu("EXIT");
        exit.addMenuListener(new menuListener());

        // letPanel
        leftPane = new JPanel();
        leftPane.setLayout(null);
        // leftPane.setSize(800, 470);
        leftPane.setBorder(BorderFactory.createLineBorder(Color.black));
        leftPane.setOpaque(false);
        leftPane.setBounds(0, 0, 800, 500);

        // rightPanel
        rightPane = new JPanel();
        // rightPane.setSize(300, 470);
        rightPane.setBorder(BorderFactory.createLineBorder(Color.red));
        rightPane.setOpaque(false);
        rightPane.setBounds(800, 0, 300, 500);

        // adding all components
        this.user = user;
        jm.add(exit);
        us = new userSeat(user);
        userSeat = us.getSeat();
        setJMenuBar(jm);
        // add(leftPane);
        // add(rightPane);

    }

    @Override
    public void run() {

        int seatX = 10;
        int seatY = 10;

        // Add user seats into leftPane
        for (int i = 0; i < user; i++) {

            if (i != 0 && i % 5 == 0) {
                // Increase y value
                System.out.println("if : " + i);
                seatX = 10;
                seatY += 100;
            }

            // Increase x values
            userSeat[i].setLocation(seatX, seatY);
            leftPane.add(userSeat[i]);
            // add(leftPane);
            System.out.println("else :" + i);
            seatX += 95;

        }

        add(leftPane);

    }

    public static void main(String[] args) {
        new Thread(new pcMain(10)).start();

    }

}

它会使线条变粗

另见KnowledgeBase

Answer 2

尝试在释放'mypaint'

后立即包含此行

 mypaint.setStyle(Paint.Style.STROKE);

Answer 3

如果删除ANTI_ALIAS_FLAG会怎样？此外，您应该将Paint构造函数移动到for循环之外，因此不会在每次迭代时重新创建它。

Android画布画线 - 使线条更粗

3 个答案: