1. 定义一个绘制多条线的自定义View类：

public class MultiLineView extends View { private List pointsList = new ArrayList<>(); // 存储线的端点坐标 private Paint linePaint = new Paint(); // 画笔

public MultiLineView(Context context) {
    super(context);
    init();
}

public MultiLineView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
}

private void init() {
    linePaint.setColor(Color.BLACK);
    linePaint.setStrokeWidth(5);
    linePaint.setStyle(Paint.Style.STROKE);
    linePaint.setAntiAlias(true);
}

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);
    if (pointsList.size() >= 2) {
        Path path = new Path();
        for (int i = 1; i < pointsList.size(); i++) {
            path.moveTo(pointsList.get(i - 1).x, pointsList.get(i - 1).y);
            path.lineTo(pointsList.get(i).x, pointsList.get(i).y);
        }
        canvas.drawPath(path, linePaint);
    }
}

public void addLine(PointF startPoint, PointF endPoint) {
    pointsList.add(startPoint);
    pointsList.add(endPoint);
    invalidate(); // 重绘
}

public void clearLines() {
    pointsList.clear();
    invalidate(); // 重绘
}

}

2. 在activity布局文件中添加该自定义View：

3. 在activity中获取该自定义View并使用addLine方法绘制多条线：

MultiLineView multiLineView = findViewById(R.id.multi_line_view); multiLineView.addLine(new PointF(100, 100), new PointF(200, 200)); multiLineView.addLine(new PointF(200, 200), new PointF(200, 300));

注意：在activity中绘制前需要先保证自定义View的onDraw方法被调用，可以通过在