Android實(shí)現(xiàn)長(zhǎng)按圓環(huán)動(dòng)畫View效果的思路代碼

更新時(shí)間：2020年09月08日 16:46:48 作者：xun-ming

這篇文章主要介紹了Android實(shí)現(xiàn)長(zhǎng)按圓環(huán)動(dòng)畫View效果,本文給大家分享實(shí)現(xiàn)思路，通過(guò)示例代碼給大家介紹的非常詳細(xì)，對(duì)大家的學(xué)習(xí)或工作具有一定的參考借鑒價(jià)值，需要的朋友可以參考下

一、需求來(lái)源

最近想到一個(gè)需求，類似悅跑圈或者Keep的結(jié)束按鈕動(dòng)畫

在這里插入圖片描述

二、思路代碼

該動(dòng)畫按鈕的主要作用就是防止用戶誤操作，具體實(shí)現(xiàn)思路如下：
1、監(jiān)聽用戶的觸摸事件OnTouchListener，在ACTION_DOWN的時(shí)候，記錄下xy坐標(biāo)和觸摸時(shí)間，同時(shí)start自定義View動(dòng)畫；在ACTION_MOVE的過(guò)程中，判斷坐標(biāo)差值的偏移量是否在一個(gè)可接受的范圍內(nèi)，是的話就保留當(dāng)前動(dòng)畫，不是的話就清除按鈕上繪制的path；在ACTION_UP的時(shí)候，再次記錄下觸摸時(shí)間，比較兩個(gè)時(shí)間是否達(dá)到了長(zhǎng)按規(guī)定的時(shí)間，是的話就執(zhí)行下一個(gè)事件，不是的話就停止動(dòng)畫重置Path。

val touchMax = 50
    var lastX = 0
    var lastY = 0
    circleView.setOnTouchListener(object : View.OnTouchListener{
      override fun onTouch(p0: View?, motionEvent: MotionEvent): Boolean {
        val endTime: Long
        val x = motionEvent.x
        val y = motionEvent.y
        when (motionEvent.action) {
          MotionEvent.ACTION_DOWN -> {
            startTime = System.currentTimeMillis()
            lastX = x.toInt()
            lastY = y.toInt()
            circleView.startAnim()
          }
          MotionEvent.ACTION_UP -> {
            endTime = System.currentTimeMillis()
            val during = endTime - startTime
            if (during < App.LONG_CLICK_TIME) {
              circleView.cancelAnim()
              circleView.clearAll()
            }else{
              playMaxWarn()
            }
          }
          MotionEvent.ACTION_MOVE -> {
            if (abs(lastX - x) > touchMax || abs(lastY - y) > touchMax) {
              circleView.clearAll()
            }
          }
        }
        return false
      }
    })

2、就是在自定義View里arcTo畫一個(gè)圓，再使用屬性動(dòng)畫來(lái)監(jiān)聽動(dòng)畫的播放即可

fun startAnim() {
    isClear = false
    valueAnimator = ValueAnimator.ofFloat(0F, 359.9999F)
    valueAnimator!!.duration = App.LONG_CLICK_TIME
    valueAnimator!!.addUpdateListener { animation ->
      mProgress = animation.animatedValue as Float
      invalidate()
    }
    valueAnimator!!.start()
  }

三、效果展示

最終實(shí)現(xiàn)效果圖雖然沒有上面那么好看，但基本效果還是達(dá)到了

在這里插入圖片描述

四、全部代碼

package cn.xmliu.melongo.view

import android.animation.ValueAnimator
import android.content.Context
import android.graphics.*
import android.util.AttributeSet
import android.view.View
import androidx.core.content.ContextCompat
import cn.xmliu.melongo.App
import cn.xmliu.melongo.R

/**
 * Date: 2020/8/12 13:21
 * Email: diyangxia@163.com
 * Description: 長(zhǎng)按動(dòng)畫View
 */
class LongCircleView(context: Context?, attrs: AttributeSet?) : View(context, attrs) {

  /**
   * 畫筆
   */
  private val paint = Paint()
  private var arcPath: Path? = null
  private var rectF: RectF? = null
  private var lineColor = 0

  /**
   * 中心點(diǎn)坐標(biāo)、半徑
   */
  private var centerX: Float? = null
  private var centerY: Float? = null
  private var radius: Float? = null

  private var left = -1F
  private var top = -1F
  private var right = -1F
  private var bottom = -1F
  private val offset = 10

  private var mProgress = -1F
  private var valueAnimator: ValueAnimator ?= null
  private var isClear = true

  init {
    lineColor = ContextCompat.getColor(context!!, R.color.red)

  }

  override fun onSizeChanged(w: Int, h: Int, oldw: Int, oldh: Int) {
    super.onSizeChanged(w, h, oldw, oldh)
    centerX = width / 2.toFloat()
    centerY = height / 2.toFloat()
    radius = height / 2.toFloat()
    left = centerX!! - radius!! + offset
    top = centerY!! - radius!! + offset
    right = centerX!! + radius!! - offset
    bottom = centerY!! + radius!! - offset

    rectF = RectF(left, top, right, bottom)
    arcPath = Path()
  }

  override fun onDraw(canvas: Canvas?) {
    super.onDraw(canvas)
    paint.isAntiAlias = true
    paint.color = lineColor
    paint.style = Paint.Style.STROKE
    paint.strokeWidth = 10F
    arcPath!!.rewind() // 清除直線數(shù)據(jù)，保留數(shù)據(jù)結(jié)構(gòu)，方便快速重用
    if(isClear) return
    arcPath!!.arcTo(rectF!!, 270F, mProgress)
    canvas?.drawPath(arcPath!!, paint)
  }

  fun startAnim() {
    isClear = false
    valueAnimator = ValueAnimator.ofFloat(0F, 359.9999F)
    valueAnimator!!.duration = App.LONG_CLICK_TIME
    valueAnimator!!.addUpdateListener { animation ->
      mProgress = animation.animatedValue as Float
      invalidate()
    }
    valueAnimator!!.start()
  }

  fun cancelAnim(){
    valueAnimator!!.cancel()
  }

  fun clearAll() {
    isClear = true
    invalidate()
  }
}

<RelativeLayout
        android:layout_width="wrap_content"
        android:layout_marginTop="5dp"
        android:layout_height="wrap_content">

        <LinearLayout
          android:id="@+id/flashLayout"
          android:layout_centerInParent="true"
          android:layout_width="70dp"
          android:layout_height="70dp"
          android:background="@drawable/btn_circle_white"
          android:gravity="center_horizontal"
          android:orientation="vertical">

          <ImageView
            android:id="@+id/flashIV"
            android:layout_width="40dp"
            android:layout_height="40dp"
            android:padding="7dp"
            android:src="@drawable/menu_flash_black"
            android:text="閃燈開"
            android:tint="@color/main_color" />

          <TextView
            android:id="@+id/flashTV"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="閃燈"
            android:textColor="@color/main_color" />
        </LinearLayout>

        <cn.xmliu.melongo.view.LongCircleView
          android:id="@+id/circleView"
          android:layout_width="80dp"
          android:layout_height="80dp" />
      </RelativeLayout>

val touchMax = 50
    var lastX = 0
    var lastY = 0
    circleView.setOnTouchListener(object : View.OnTouchListener{
      override fun onTouch(p0: View?, motionEvent: MotionEvent): Boolean {
        val endTime: Long
        val x = motionEvent.x
        val y = motionEvent.y
        when (motionEvent.action) {
          MotionEvent.ACTION_DOWN -> {
            startTime = System.currentTimeMillis()
            lastX = x.toInt()
            lastY = y.toInt()
            circleView.startAnim()
          }
          MotionEvent.ACTION_UP -> {
            endTime = System.currentTimeMillis()
            val during = endTime - startTime
            if (during < App.LONG_CLICK_TIME) {
              circleView.cancelAnim()
              circleView.clearAll()
            }else{
              flashTV.text = "OK"
            }
          }
          MotionEvent.ACTION_MOVE -> {
            if (abs(lastX - x) > touchMax || abs(lastY - y) > touchMax) {
              circleView.clearAll()
            }
          }
        }
        return false
      }
    })

總結(jié)

到此這篇關(guān)于Android實(shí)現(xiàn)長(zhǎng)按圓環(huán)動(dòng)畫View效果的文章就介紹到這了,更多相關(guān)android長(zhǎng)按圓環(huán)動(dòng)畫內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！

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