Android實(shí)現(xiàn)自定義倒計(jì)時(shí)

更新時(shí)間：2020年07月24日 17:22:20 作者：Robert_dl

這篇文章主要為大家詳細(xì)介紹了Android實(shí)現(xiàn)自定義倒計(jì)時(shí)，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

最近工作中遇到個(gè)要做倒計(jì)時(shí)60秒的進(jìn)度條，經(jīng)過(guò)參考別人的資料做出來(lái)需求的效果。廢話少說(shuō)先來(lái)個(gè)效果：

一定想知道是怎么實(shí)現(xiàn)的吧！下面是代碼

public class CountDownView extends View {
 //圓輪顏色
 private int mRingColor;
 //默認(rèn)圓顏色
 private int mRingNormalColor ;
 //圓輪寬度
 private float mRingWidth;
 //圓輪進(jìn)度值文本大小
 private int mRingProgessTextSize;
 //寬度
 private int mWidth;
 //高度
 private int mHeight;
 private Paint mPaint;
 private Paint paintNormal;
 //圓環(huán)的矩形區(qū)域
 private RectF mRectF;
 //
 private int mProgessTextColor;
 private int mCountdownTime;
 private float mCurrentProgress;
 private OnCountDownFinishListener mListener;
 private ValueAnimator valueAnimator ;
 
 public CountDownView(Context context) {
  this(context, null);
 }
 
 public CountDownView(Context context, AttributeSet attrs) {
  this(context, attrs, 0);
 }
 
 public CountDownView(Context context, AttributeSet attrs, int defStyleAttr) {
  super(context, attrs, defStyleAttr);
  TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CountDownView);
  mRingColor = a.getColor(R.styleable.CountDownView_ringColor, context.getResources().getColor(R.color.circle_progress));
  mRingWidth = a.getFloat(R.styleable.CountDownView_ringWidth, 8);
  mRingProgessTextSize = a.getDimensionPixelSize(R.styleable.CountDownView_progressTextSize, DisplayUtil.sp2px(context, 12));
  mProgessTextColor = a.getColor(R.styleable.CountDownView_progressTextColor, context.getResources().getColor(R.color.circle_progress));
  mCountdownTime = a.getInteger(R.styleable.CountDownView_countdownTime, 60);
  mRingNormalColor = a.getColor(R.styleable.CountDownView_ringColor, context.getResources().getColor(R.color._circle_progress));
  a.recycle();
  paintNormal = new Paint(Paint.ANTI_ALIAS_FLAG);
  paintNormal.setAntiAlias(true);
  mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  mPaint.setAntiAlias(true);
  this.setWillNotDraw(false);
 }
 
 public void setCountdownTime(int mCountdownTime) {
  this.mCountdownTime = mCountdownTime;
 }
 
 @Override
 protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
  super.onLayout(changed, left, top, right, bottom);
  mWidth = getMeasuredWidth();
  mHeight = getMeasuredHeight();
  mRectF = new RectF(0 + mRingWidth / 2, 0 + mRingWidth / 2,
    mWidth - mRingWidth / 2, mHeight - mRingWidth / 2);
 }
 
 @Override
 protected void onDraw(Canvas canvas) {
  super.onDraw(canvas);
  /**
   *圓環(huán)
   */
  //顏色
  mPaint.setColor(mRingColor);
  //空心
  mPaint.setStyle(Paint.Style.STROKE);
  //寬度
  mPaint.setStrokeWidth(mRingWidth);
  /**
   *默認(rèn)圓環(huán)
   */
  //顏色
  paintNormal.setColor(mRingNormalColor);
  //空心
  paintNormal.setStyle(Paint.Style.STROKE);
  //寬度
  paintNormal.setStrokeWidth(mRingWidth);
  canvas.drawArc(mRectF, 360, 360, false, paintNormal);
  canvas.drawArc(mRectF, -90, mCurrentProgress - 360, false, mPaint);
  //繪制文本
  Paint textPaint = new Paint();
  textPaint.setAntiAlias(true);
  textPaint.setTextAlign(Paint.Align.CENTER);
  String text = mCountdownTime - (int) (mCurrentProgress / 360f * mCountdownTime) + "";
  textPaint.setTextSize(mRingProgessTextSize);
  textPaint.setColor(mProgessTextColor);
 
  //文字居中顯示
  Paint.FontMetricsInt fontMetrics = textPaint.getFontMetricsInt();
  int baseline = (int) ((mRectF.bottom + mRectF.top - fontMetrics.bottom - fontMetrics.top) / 2);
  canvas.drawText(text, mRectF.centerX(), baseline, textPaint);
 }
 
 private ValueAnimator getValA(long countdownTime) {
  ValueAnimator valueAnimator = ValueAnimator.ofFloat(0, 100);
  valueAnimator.setDuration(countdownTime);
  valueAnimator.setInterpolator(new LinearInterpolator());
  valueAnimator.setRepeatCount(0);
  return valueAnimator;
 }
 /**
  * 開(kāi)始倒計(jì)時(shí)
  */
 public void startCountDown() {
  setClickable(false);
  valueAnimator = getValA(mCountdownTime * 1000);
  valueAnimator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
   @Override
   public void onAnimationUpdate(ValueAnimator animation) {
    float i = Float.valueOf(String.valueOf(animation.getAnimatedValue()));
    mCurrentProgress = (int) (360 * (i / 100f));
    invalidate();
   }
  });
  valueAnimator.start();
  valueAnimator.addListener(new AnimatorListenerAdapter() {
   @Override
   public void onAnimationEnd(Animator animation) {
    super.onAnimationEnd(animation);
    //倒計(jì)時(shí)結(jié)束回調(diào)
    if (mListener != null) {
     mListener.countDownFinished();
    }
    setClickable(true);
   }
 
  });
 }
 public void setAddCountDownListener(OnCountDownFinishListener mListener) {
  this.mListener = mListener;
 }
 public interface OnCountDownFinishListener {
  void countDownFinished();
 }
 public void stopCountDown(){
  valueAnimator.end();
 }
 
}

然后新建一個(gè)attr.xml;

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <declare-styleable name="CountDownView">
  <!--顏色-->
  <attr name="ringColor" format="color" />
  <!-- 進(jìn)度文本的字體大小 -->
  <attr name="progressTextSize" format="dimension" />
  <!-- 圓環(huán)寬度 -->
  <attr name="ringWidth" format="float" />
  <!--進(jìn)度文本顏色-->
  <attr name="progressTextColor" format="color"/>
  <!--倒計(jì)時(shí)-->
  <attr name="countdownTime" format="integer"/>
 </declare-styleable>
</resources>

這樣一個(gè)自定義的view就寫(xiě)完了；那怎么用呢；布局就不說(shuō)了；

losTime.setAddCountDownListener(new CountDownView.OnCountDownFinishListener() {
    @Override
    public void countDownFinished() {
     倒計(jì)時(shí)結(jié)束
    }
   });
losTime.setCountdownTime(60);
losTime.startCountDown();

這樣就輕輕松松的跑起來(lái)了，希望能幫助到需要的你；

以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持腳本之家。

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