public class PointLine extends View {

    Paint mLinePaint;
Paint mPointPaint;
    float width;
    float height;
    float pointAddress[] = new float[]{72, 200,  216, 200, 360, 200,  504, 200, 648, 200};
    float lineAddress[] = new float[]{72, 200, 216, 200, 216, 200, 360, 200, 360, 200, 504, 200, 504, 200, 648, 200};
    public 
 
PointLine(Context context) {
        this(context, null);
}

    public PointLine(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
}

    public PointLine(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
mLinePaint 
 
= new Paint();
mLinePaint.setColor(Color.RED);
mPointPaint = new Paint();
mPointPaint.setColor(Color.BLACK);
}


    @Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec);
width = getMeasuredWidth() / 5;
height = getMeasuredHeight() / 2
 
;
}

    @Override
protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
//一定要設定線的的寬度
mPointPaint.setStrokeWidth((float) 20.0);         //線寬
        //點的陣列一定是2的整數倍
canvas.drawPoints(pointAddress, mPointPaint);
//一定要設定線的的寬度
mLinePaint.setStrokeWidth((float) 10.0);
//線的陣列一定是4的整數倍
canvas.drawLines(lineAddress, mLinePaint);
}
}