Android尺子

尺子UI布局

自定义TextView

public class CM extends TextView {public CM(Context context) {super(context);init();}public CM(Context context, AttributeSet attrs) {super(context, attrs);init();}private void init() {setGravity(Gravity.BOTTOM);}@Overridepublic void draw(Canvas canvas) {super.draw(canvas);float mmWidth = ((float) getWidth()) / 10;Paint p = new Paint();p.setColor(Color.BLACK);float top = 2;for (int i = 0; i < 10; i++) {if (i % 5 == 0) {canvas.drawLine(i * mmWidth, top, i * mmWidth, top + 2 * mmWidth, p);} else {canvas.drawLine(i * mmWidth, top, i * mmWidth, top + mmWidth, p);}
//            if (i % 2 == 1) {canvas.drawRect(i * mmWidth, top, i * mmWidth + mmWidth, top + mmWidth, p);
//                canvas.drawLine(i * mmWidth, top, i * mmWidth, top + mmWidth, p);
//            } else {
//                canvas.drawLine(i * mmWidth, top, i * mmWidth, top + 2 * mmWidth, p);
//            }}}}

https://github.com/LiuchangDuan/androiddemo/tree/master/myruler

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