这个View目前包含直线虚线波浪线，下面我把View的代码粘上了

/*

* Created by dell

* on 2020/8/7

* The package is sport.randong.com.randongsport.view

* This Class is ...

*/

public class LineViewextends View {

private float lineSize =0;//线粗细

private float lineWidth =0;//线宽

private float lineHeight =0;//线高

private int lineColor =0;//线的颜色

private int lineAngle =0;//线的偏折角度

private int lineStyle =0;//线的风格

private int orientation =0;//线的方向有横向纵向两个取值范围

private int lineSmallLength =0;//虚线的每个小横线的长度

private int lineSmallSpace =0;//虚线的每个小横线之间的间距

private float lineWavyCrestSpace =0;//波峰间距

private float lineWavyCrestHeight =0;//波峰高度

//--------------------------------线的风格取值--------------------------------

public static final int LINE_STRAIGNT =1;//直线

public static final int LINE_IMAGINARY =2;//虚线

public static final int LINE_WAVY =3;//波浪线

//------------------------------线的方向取值范围------------------------------

public static final int VERTICAL =1;//竖向

public static final int HORIZONTAL =2;//横向

private Paintpaint;

public LineView(Context context,@Nullable AttributeSet attrs) {

this(context, attrs,0);

}

public LineView(Context context,@Nullable AttributeSet attrs,int defStyleAttr) {

super(context, attrs, defStyleAttr);

TypedArray ta = context.obtainStyledAttributes(attrs, R.styleable.LineView);

lineSize = ta.getDimension(R.styleable.LineView_line_size,0);

lineHeight = ta.getDimension(R.styleable.LineView_line_height,0);

lineWidth = ta.getDimension(R.styleable.LineView_line_width,0);

lineColor = ta.getColor(R.styleable.LineView_line_color,0x00000000);//线的颜色默认黑色

lineAngle = ta.getInt(R.styleable.LineView_line_angle,0);//线的偏折角度默认0度(12点中方向)

lineStyle = ta.getInt(R.styleable.LineView_line_style,0);

orientation = ta.getInt(R.styleable.LineView_orientation,1);//线的方向默认纵向

lineSmallLength = ta.getInt(R.styleable.LineView_line_small_length,5);//虚线的每个小横线的长度默认5

lineSmallSpace = ta.getInt(R.styleable.LineView_line_small_space,5);//虚线的每个小横线之间的间距默认5

lineWavyCrestHeight = ta.getDimension(R.styleable.LineView_line_wavy_crest_height,10);//波峰高度

lineWavyCrestSpace = ta.getDimension(R.styleable.LineView_line_wavy_crest_space,10);//波峰间距

paint =new Paint();

paint.setColor(lineColor);

paint.setStrokeWidth(lineSize *2);

}

@Override

protected void onMeasure(int widthMeasureSpec,int heightMeasureSpec) {

int specModeWidth = MeasureSpec.getMode(widthMeasureSpec);

int specModeHeight = MeasureSpec.getMode(heightMeasureSpec);

int specSizwWidth = MeasureSpec.getSize(widthMeasureSpec);

int specSizwHeight = MeasureSpec.getSize(heightMeasureSpec);

// switch (specModeWidth) {

// case MeasureSpec.EXACTLY:

// case MeasureSpec.UNSPECIFIED: {

// //铺满

// lineWidth = specSizwWidth;

// lineHeight = lineSize;

// }

// break;

// case MeasureSpec.AT_MOST: {

// //自适应

// }

// break;

// }

// switch (specModeHeight) {

// case MeasureSpec.EXACTLY:

// case MeasureSpec.UNSPECIFIED: {

// //铺满

// lineHeight = specSizwHeight;

// lineWidth = lineSize;

// }

// break;

// case MeasureSpec.AT_MOST: {

// //自适应

// }

// break;

// }

if (lineStyle ==LINE_WAVY) {

//这里是波浪线的测量方法

if (orientation ==VERTICAL) {

if (specModeHeight == MeasureSpec.EXACTLY) {

lineHeight = specSizwHeight;

}

setMeasuredDimension((int)lineWavyCrestHeight +500, (int)lineHeight);

}else if (orientation ==HORIZONTAL) {

if (specModeWidth == MeasureSpec.EXACTLY) {

lineWidth = specSizwWidth;

}

setMeasuredDimension((int)lineWidth, (int)lineWavyCrestHeight);

}

return;

}

if (orientation ==VERTICAL) {

if (specModeHeight == MeasureSpec.EXACTLY) {

lineHeight = specSizwHeight;

}

lineWidth =lineSize;

}else if (orientation ==HORIZONTAL) {

if (specModeWidth == MeasureSpec.EXACTLY) {

lineWidth = specSizwWidth;

}

lineHeight =lineSize;

}else {

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

}

setMeasuredDimension((int)lineWidth, (int)lineHeight);

}

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

if (lineStyle ==LINE_STRAIGNT)

if (orientation ==VERTICAL) {

//竖线

canvas.drawLine(0,0,0,lineHeight,paint);

}else {

//横线

canvas.drawLine(0,0,lineWidth,0,paint);

}

else if (lineStyle ==LINE_IMAGINARY) {

//虚线

int width = getWidth();//View的宽度

int height = getHeight();//View的高度

if (orientation ==VERTICAL) {

//竖线

for (int index =0; index <= height; index +=lineSmallLength +lineSmallSpace) {

canvas.drawLine(0, index,0, index +lineSmallLength,paint);

}

}else {

//横线

for (int index =0; index <= width; index +=lineSmallLength +lineSmallSpace) {

canvas.drawLine(index,0, index +lineSmallLength,0,paint);

}

}

}else if (lineStyle ==LINE_WAVY) {

paint.setStyle(Paint.Style.STROKE);

paint.setAntiAlias(true);

//波浪线

int height = getHeight();

int width = getWidth();

Path path =new Path();

if (orientation ==VERTICAL) {

//竖线

for (int i =0; i < height; i +=lineWavyCrestSpace *2) {

path.moveTo(width /2, i);

path.quadTo(width /2 -lineWavyCrestHeight, (i +lineWavyCrestSpace - (lineWavyCrestSpace /2)), width /2, i +lineWavyCrestSpace);

path.moveTo(width /2, i +lineWavyCrestSpace);

path.quadTo(lineWavyCrestHeight + width /2, (i +lineWavyCrestSpace *2 - (lineWavyCrestSpace /2)), width /2, i +lineWavyCrestSpace *2);

canvas.drawPath(path,paint);

}

}else if (orientation ==HORIZONTAL) {

//横线

for (int i =0; i < width; i +=lineWavyCrestSpace *2) {

path.moveTo(i, height /2);

path.quadTo((i +lineWavyCrestSpace - (lineWavyCrestSpace /2)), height /2 -lineWavyCrestHeight, i +lineWavyCrestSpace, height /2);

path.moveTo(i +lineWavyCrestSpace, height /2);

path.quadTo((i +lineWavyCrestSpace *2 - (lineWavyCrestSpace /2)),lineWavyCrestHeight + height /2, i +lineWavyCrestSpace *2, height /2);

canvas.drawPath(path,paint);

}

}

}

}

}

这个就是View的源码，可能性能问题没有考虑。。。接下来是自定义属性

<declare-styleable name="LineView">

<attr name="line_size" format="dimension" />



<attr name="line_width" format="dimension" />

<attr name="line_height" format="dimension" />

<attr name="line_color" format="color" />

<attr name="line_angle" format="integer" />

<attr name="line_style">

<enum name="straignt" value="1" />

<enum name="imaginary" value="2" />

<enum name="wavy" value="3" />

</attr>

<attr name="orientation">

<enum name="vertical" value="1" /> 

<enum name="horizontal" value="2" />

</attr>



<attr name="line_small_length" format="integer" />

<attr name="line_small_space" format="integer" />



<attr name="line_wavy_crest_space" format="dimension" />

<attr name="line_wavy_crest_height" format="dimension" />

</declare-styleable>