android 自定义密码框

1.自定义view

import android.content.Context

import android.graphics.Canvas

import android.graphics.Color

import android.graphics.Paint

import android.graphics.Rect

import android.util.AttributeSet

import android.view.View

import java.lang.StringBuilder

/**

* @author wellJan

* 自定义密码框

*/

class TestView : View {

constructor(context: Context?) :super(context,null,0)

constructor(context: Context?, attrs: AttributeSet?) :super(context, attrs,0)

constructor(context: Context?, attrs: AttributeSet?, defStyleAttr: Int) :super(

context,

        attrs,

        defStyleAttr

)

private var paint = Paint()

private var pointPaint = Paint()

//单个密码框的宽度

    private var itemW =0

    //item的间隔

    private var itemPadding =20;

    private var size =6

    init {

paint.color = (Color.BLACK)

paint.isAntiAlias =true

        paint.style = Paint.Style.STROKE

        setBackgroundColor(Color.WHITE)

pointPaint.color = (Color.BLACK)

pointPaint.isAntiAlias =true

        pointPaint.style = Paint.Style.FILL

    }

override fun onDraw(canvas: Canvas?) {

super.onDraw(canvas)

//先绘制size个密码框框

        itemW = (measuredWidth-paddingLeft-paddingRight-(size-1)*itemPadding)/size;

        canvas!!.translate(paddingLeft.toFloat(),0f)

canvas.save()

var rect = Rect(0,0,itemW,measuredHeight)

for (iin 0 until size){

canvas!!.drawRect(rect,paint)

if (i

//画实心圆

                canvas.drawCircle(itemW/2.toFloat(),measuredHeight/2.toFloat(),itemW/size.toFloat(),pointPaint)

}

canvas.translate(itemPadding.toFloat()+itemW,0f)

}

canvas!!.restore()

}

var stringBuilder = StringBuilder()

public fun addNumber(number:String){

if (stringBuilder.length ==size)

return

        stringBuilder.append(number)

invalidate()

}

public fun delNumber(){

if (stringBuilder.isEmpty())

return

        stringBuilder.deleteAt(stringBuilder.length-1)

invalidate()

}

public fun getNumber():String{

return stringBuilder.toString()

}

}