验证码自定义控件

效果图

自定义边框

内部控制倒计时

居中/宽度自适应

控件源代码

class VerificationCodeView : View {
    val mContext: Context
    var enableStr: String
    var disableStr: String
    var totalCountdownTime: Int
    var mTickCount: Long = 0
    var enablColor: Int
    var disablColor: Int
    var boardColor: Int
    var showBoardColor = false
    var mEnable = true
    var textsize: Float = 0F
    var padding: Float = 0F
    var strokeWidth: Float = 0F
    var radiusSize: Float = 0F

    var fatherHeight: Float = 0F
    var fatherWidth: Float = 0F

    lateinit var fatherRectF: RectF
    lateinit var textPaint: TextPaint
    lateinit var boardPaint: Paint

    constructor(context: Context) : this(context, null)

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

    constructor(context: Context, attrs: AttributeSet?, defStyleAttr: Int) : super(
        context, attrs, defStyleAttr
    ) {
        mContext = context
        val a = context.obtainStyledAttributes(attrs, R.styleable.VerificationCodeView)
        totalCountdownTime = a.getInteger(R.styleable.VerificationCodeView_totalCountdownTime, 60)
        textsize = a.getDimension(R.styleable.VerificationCodeView_codeTextSize, dp2px(14f))
        showBoardColor = a.getBoolean(R.styleable.VerificationCodeView_showBoardColor, false)
        mEnable = a.getBoolean(R.styleable.VerificationCodeView_enable, true)
        enableStr = a.getString(R.styleable.VerificationCodeView_enableStr) ?: mContext.getString(
            com.guide.strings.R.string.userinfo_get_code
        )
        disableStr = a.getString(R.styleable.VerificationCodeView_disableStr) ?: "%dS"
        enablColor = a.getColor(
            R.styleable.VerificationCodeView_enableColor, ContextCompat.getColor(
                mContext, color.lib_common_selected
            )
        )
        disablColor = a.getColor(
            R.styleable.VerificationCodeView_disableColor, ContextCompat.getColor(
                mContext, color.lib_common_color_dd
            )
        )

        boardColor = a.getColor(
            R.styleable.VerificationCodeView_boardColor, ContextCompat.getColor(
                mContext, color.lib_common_selected
            )
        )
        a.recycle()
        init()
    }


    private fun init() {
        setWillNotDraw(false)
        padding = dp2px(40F)
        strokeWidth = dp2px(1F)
        radiusSize = dp2px(3F)
        initPaint()
    }

    private fun initPaint() {
        textPaint = TextPaint()
        textPaint.color = enablColor
        textPaint.textSize = textsize
        textPaint.style = Paint.Style.FILL

        boardPaint = Paint()
        boardPaint.color = boardColor
        boardPaint.isAntiAlias = true
        boardPaint.style = Paint.Style.STROKE
        boardPaint.strokeWidth = strokeWidth


        fatherWidth = getTextW(textPaint, enableStr) + padding
        fatherHeight = getTextH(textPaint, enableStr) + padding / 2
    }

    /**
     * 开启倒计时
     */
    fun startCountdown() {
        mViewCountDownTimer?.cancel()
        mViewCountDownTimer = ViewCountDownTimer(totalCountdownTime * 1000L, 1000L)
        mViewCountDownTimer?.start()
    }

    fun cancelCountdown() {
        mViewCountDownTimer?.cancel()
        mViewCountDownTimer = null
    }

    override fun onDetachedFromWindow() {
        cancelCountdown()
        super.onDetachedFromWindow()
    }

    var mViewCountDownTimer: ViewCountDownTimer? = null

    inner class ViewCountDownTimer(millisInFuture: Long, countDownInterval: Long) :
        CountDownTimer(millisInFuture, countDownInterval) {

        override fun onTick(p0: Long) {
            mTickCount = p0 / 1000
            mEnable = false
            postInvalidate()
        }

        override fun onFinish() {
            mEnable = true
            postInvalidate()
        }

    }

    override fun onDraw(canvas: Canvas?) {
        super.onDraw(canvas)
        if (mEnable) {
            if (isTouch) {
                textPaint.color = disablColor
                boardPaint.color = disablColor
            } else {
                textPaint.color = enablColor
                boardPaint.color = enablColor
            }
            if (showBoardColor) {
                canvas?.drawRoundRect(fatherRectF, radiusSize, radiusSize, boardPaint)
            }
            canvas?.drawText(
                enableStr,
                (fatherWidth - getTextW(textPaint, enableStr)) / 2,
                (getTextH(textPaint, enableStr) + fatherHeight) / 2,
                textPaint
            )
        } else {
            textPaint.color = disablColor
            boardPaint.color = disablColor
            if (showBoardColor) {
                canvas?.drawRoundRect(fatherRectF, radiusSize, radiusSize, boardPaint)
            }
            val format = String.format(disableStr, mTickCount)
            canvas?.drawText(
                format,
                (fatherWidth - getTextW(textPaint, format)) / 2,
                (getTextH(textPaint, format) + fatherHeight) / 2,
                textPaint
            )
        }
    }

    override fun onMeasure(widthMeasureSpec: Int, heightMeasureSpec: Int) {
        super.onMeasure(widthMeasureSpec, heightMeasureSpec)

        val widthMode = MeasureSpec.getMode(widthMeasureSpec)
        val widthSize = MeasureSpec.getSize(widthMeasureSpec)
        val heightSize = MeasureSpec.getSize(heightMeasureSpec)


        //不能超过父布局大小
        if (fatherWidth > widthSize) {
            fatherWidth = widthSize.toFloat()
        }

        fatherRectF = RectF(0F, 0F, fatherWidth, fatherHeight)

        Log.d("ssss", "widthMode " + widthMode)
        Log.d("ssss", "widthSize " + widthSize)
        Log.d("ssss", "heightSize " + heightSize)

        setMeasuredDimension(fatherWidth.toInt(), fatherHeight.toInt())
    }

    private fun dp2px(dpValue: Float): Float {
        val scale = Resources.getSystem().displayMetrics.density
        return dpValue * scale + 0.5f
    }

    private fun getTextH(pFont: TextPaint, text: String): Int {
        val rect = Rect()
        pFont.getTextBounds(text, 0, text.length, rect)
        return rect.height()
    }

    private fun getTextW(pFont: TextPaint, text: String): Float {
        return pFont.measureText(text)
    }

    var isTouch = false
    var lastAction: Int = -1
    var actionDownTime: Long = 0
    var actionUpTime: Long = 0L
    var clickSpaceTime: Long = 1000L
    var lastClickTime: Long = 0L

    public interface OnClickListener {
        fun onClick()
    }

    var mOnClickListener: OnClickListener? = null

    override fun onTouchEvent(event: MotionEvent): Boolean {
        if (MotionEvent.ACTION_DOWN == event.action) {
            actionDownTime = System.currentTimeMillis()
            lastAction = MotionEvent.ACTION_DOWN
            isTouch = true
            invalidate()
        } else if (MotionEvent.ACTION_MOVE == event.action) {
            lastAction = MotionEvent.ACTION_MOVE
            isTouch = true
            invalidate()
        } else if (MotionEvent.ACTION_UP == event.action) {
            lastAction = MotionEvent.ACTION_UP
            actionUpTime = System.currentTimeMillis()
            val canClickSpace = actionUpTime - lastClickTime > clickSpaceTime
            val isClick = actionUpTime - actionDownTime < clickSpaceTime
            if (mEnable && canClickSpace && isClick) {
                lastClickTime = actionUpTime
                mOnClickListener?.onClick()
            }
            isTouch = false
            invalidate()
        }
        return true
    }
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234

Style

 <declare-styleable name="VerificationCodeView">
        <attr name="enable" format="boolean" />
        <attr name="showBoardColor" format="boolean" />
        <attr name="disableColor" format="color|reference" />
        <attr name="enableColor" format="color|reference" />
        <attr name="backColor" format="color|reference" />
        <attr name="boardColor" format="color|reference" />
        <attr name="totalCountdownTime" format="integer" />
        <attr name="enableStr" format="reference" />
        <attr name="disableStr" format="reference" />
        <attr name="codeTextSize" format="reference" />
    </declare-styleable>
1
2
3
4
5
6
7
8
9
10
11
12

Xml

    <com.guide.userinfo.widget.VerificationCodeView
        android:id="@+id/tv_get_code"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="@dimen/lib_common_20dp"
        app:codeTextSize="@dimen/lib_common_12sp"
        app:disableColor="@color/lib_common_gray_999"
        app:disableStr="@string/userinfo_num"
        app:enable="true"
        app:enableStr="@string/userinfo_get_code"
        app:layout_constraintBottom_toBottomOf="@+id/mobile_code"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="@+id/mobile_code"
        app:showBoardColor="false"
        app:totalCountdownTime="60" />

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Code

手动开启倒计时

     mViewBinding.tvGetCode.mOnClickListener = object : VerificationCodeView.OnClickListener {
            override fun onClick() {
                //发送验证码成功
                mViewBinding.tvGetCode.startCountdown()
            }
        }
1
2
3
4
5
6